initial code repo
[stor4nfv.git] / src / ceph / qa / tasks / ceph_manager.py
diff --git a/src/ceph/qa/tasks/ceph_manager.py b/src/ceph/qa/tasks/ceph_manager.py
new file mode 100644 (file)
index 0000000..5a89f23
--- /dev/null
@@ -0,0 +1,2592 @@
+"""
+ceph manager -- Thrasher and CephManager objects
+"""
+from cStringIO import StringIO
+from functools import wraps
+import contextlib
+import random
+import signal
+import time
+import gevent
+import base64
+import json
+import logging
+import threading
+import traceback
+import os
+from teuthology import misc as teuthology
+from tasks.scrub import Scrubber
+from util.rados import cmd_erasure_code_profile
+from util import get_remote
+from teuthology.contextutil import safe_while
+from teuthology.orchestra.remote import Remote
+from teuthology.orchestra import run
+from teuthology.exceptions import CommandFailedError
+
+try:
+    from subprocess import DEVNULL # py3k
+except ImportError:
+    DEVNULL = open(os.devnull, 'r+')
+
+DEFAULT_CONF_PATH = '/etc/ceph/ceph.conf'
+
+log = logging.getLogger(__name__)
+
+
+def write_conf(ctx, conf_path=DEFAULT_CONF_PATH, cluster='ceph'):
+    conf_fp = StringIO()
+    ctx.ceph[cluster].conf.write(conf_fp)
+    conf_fp.seek(0)
+    writes = ctx.cluster.run(
+        args=[
+            'sudo', 'mkdir', '-p', '/etc/ceph', run.Raw('&&'),
+            'sudo', 'chmod', '0755', '/etc/ceph', run.Raw('&&'),
+            'sudo', 'python',
+            '-c',
+            ('import shutil, sys; '
+             'shutil.copyfileobj(sys.stdin, file(sys.argv[1], "wb"))'),
+            conf_path,
+            run.Raw('&&'),
+            'sudo', 'chmod', '0644', conf_path,
+        ],
+        stdin=run.PIPE,
+        wait=False)
+    teuthology.feed_many_stdins_and_close(conf_fp, writes)
+    run.wait(writes)
+
+
+def mount_osd_data(ctx, remote, cluster, osd):
+    """
+    Mount a remote OSD
+
+    :param ctx: Context
+    :param remote: Remote site
+    :param cluster: name of ceph cluster
+    :param osd: Osd name
+    """
+    log.debug('Mounting data for osd.{o} on {r}'.format(o=osd, r=remote))
+    role = "{0}.osd.{1}".format(cluster, osd)
+    alt_role = role if cluster != 'ceph' else "osd.{0}".format(osd)
+    if remote in ctx.disk_config.remote_to_roles_to_dev:
+        if alt_role in ctx.disk_config.remote_to_roles_to_dev[remote]:
+            role = alt_role
+        if role not in ctx.disk_config.remote_to_roles_to_dev[remote]:
+            return
+        dev = ctx.disk_config.remote_to_roles_to_dev[remote][role]
+        mount_options = ctx.disk_config.\
+            remote_to_roles_to_dev_mount_options[remote][role]
+        fstype = ctx.disk_config.remote_to_roles_to_dev_fstype[remote][role]
+        mnt = os.path.join('/var/lib/ceph/osd', '{0}-{1}'.format(cluster, osd))
+
+        log.info('Mounting osd.{o}: dev: {n}, cluster: {c}'
+                 'mountpoint: {p}, type: {t}, options: {v}'.format(
+                     o=osd, n=remote.name, p=mnt, t=fstype, v=mount_options,
+                     c=cluster))
+
+        remote.run(
+            args=[
+                'sudo',
+                'mount',
+                '-t', fstype,
+                '-o', ','.join(mount_options),
+                dev,
+                mnt,
+            ]
+            )
+
+
+class Thrasher:
+    """
+    Object used to thrash Ceph
+    """
+    def __init__(self, manager, config, logger=None):
+        self.ceph_manager = manager
+        self.cluster = manager.cluster
+        self.ceph_manager.wait_for_clean()
+        osd_status = self.ceph_manager.get_osd_status()
+        self.in_osds = osd_status['in']
+        self.live_osds = osd_status['live']
+        self.out_osds = osd_status['out']
+        self.dead_osds = osd_status['dead']
+        self.stopping = False
+        self.logger = logger
+        self.config = config
+        self.revive_timeout = self.config.get("revive_timeout", 360)
+        self.pools_to_fix_pgp_num = set()
+        if self.config.get('powercycle'):
+            self.revive_timeout += 120
+        self.clean_wait = self.config.get('clean_wait', 0)
+        self.minin = self.config.get("min_in", 4)
+        self.chance_move_pg = self.config.get('chance_move_pg', 1.0)
+        self.sighup_delay = self.config.get('sighup_delay')
+        self.optrack_toggle_delay = self.config.get('optrack_toggle_delay')
+        self.dump_ops_enable = self.config.get('dump_ops_enable')
+        self.noscrub_toggle_delay = self.config.get('noscrub_toggle_delay')
+        self.chance_thrash_cluster_full = self.config.get('chance_thrash_cluster_full', .05)
+        self.chance_thrash_pg_upmap = self.config.get('chance_thrash_pg_upmap', 1.0)
+        self.chance_thrash_pg_upmap_items = self.config.get('chance_thrash_pg_upmap', 1.0)
+        self.random_eio = self.config.get('random_eio')
+        self.chance_force_recovery = self.config.get('chance_force_recovery', 0.3)
+
+        num_osds = self.in_osds + self.out_osds
+        self.max_pgs = self.config.get("max_pgs_per_pool_osd", 1200) * num_osds
+        if self.logger is not None:
+            self.log = lambda x: self.logger.info(x)
+        else:
+            def tmp(x):
+                """
+                Implement log behavior
+                """
+                print x
+            self.log = tmp
+        if self.config is None:
+            self.config = dict()
+        # prevent monitor from auto-marking things out while thrasher runs
+        # try both old and new tell syntax, in case we are testing old code
+        self.saved_options = []
+        # assuming that the default settings do not vary from one daemon to
+        # another
+        first_mon = teuthology.get_first_mon(manager.ctx, self.config).split('.')
+        opts = [('mon', 'mon_osd_down_out_interval', 0)]
+        for service, opt, new_value in opts:
+            old_value = manager.get_config(first_mon[0],
+                                           first_mon[1],
+                                           opt)
+            self.saved_options.append((service, opt, old_value))
+            self._set_config(service, '*', opt, new_value)
+        # initialize ceph_objectstore_tool property - must be done before
+        # do_thrash is spawned - http://tracker.ceph.com/issues/18799
+        if (self.config.get('powercycle') or
+            not self.cmd_exists_on_osds("ceph-objectstore-tool") or
+            self.config.get('disable_objectstore_tool_tests', False)):
+            self.ceph_objectstore_tool = False
+            self.test_rm_past_intervals = False
+            if self.config.get('powercycle'):
+                self.log("Unable to test ceph-objectstore-tool, "
+                         "powercycle testing")
+            else:
+                self.log("Unable to test ceph-objectstore-tool, "
+                         "not available on all OSD nodes")
+        else:
+            self.ceph_objectstore_tool = \
+                self.config.get('ceph_objectstore_tool', True)
+            self.test_rm_past_intervals = \
+                self.config.get('test_rm_past_intervals', True)
+        # spawn do_thrash
+        self.thread = gevent.spawn(self.do_thrash)
+        if self.sighup_delay:
+            self.sighup_thread = gevent.spawn(self.do_sighup)
+        if self.optrack_toggle_delay:
+            self.optrack_toggle_thread = gevent.spawn(self.do_optrack_toggle)
+        if self.dump_ops_enable == "true":
+            self.dump_ops_thread = gevent.spawn(self.do_dump_ops)
+        if self.noscrub_toggle_delay:
+            self.noscrub_toggle_thread = gevent.spawn(self.do_noscrub_toggle)
+
+    def _set_config(self, service_type, service_id, name, value):
+        opt_arg = '--{name} {value}'.format(name=name, value=value)
+        whom = '.'.join([service_type, service_id])
+        self.ceph_manager.raw_cluster_cmd('--', 'tell', whom,
+                                          'injectargs', opt_arg)
+
+
+    def cmd_exists_on_osds(self, cmd):
+        allremotes = self.ceph_manager.ctx.cluster.only(\
+            teuthology.is_type('osd', self.cluster)).remotes.keys()
+        allremotes = list(set(allremotes))
+        for remote in allremotes:
+            proc = remote.run(args=['type', cmd], wait=True,
+                              check_status=False, stdout=StringIO(),
+                              stderr=StringIO())
+            if proc.exitstatus != 0:
+                return False;
+        return True;
+
+    def kill_osd(self, osd=None, mark_down=False, mark_out=False):
+        """
+        :param osd: Osd to be killed.
+        :mark_down: Mark down if true.
+        :mark_out: Mark out if true.
+        """
+        if osd is None:
+            osd = random.choice(self.live_osds)
+        self.log("Killing osd %s, live_osds are %s" % (str(osd),
+                                                       str(self.live_osds)))
+        self.live_osds.remove(osd)
+        self.dead_osds.append(osd)
+        self.ceph_manager.kill_osd(osd)
+        if mark_down:
+            self.ceph_manager.mark_down_osd(osd)
+        if mark_out and osd in self.in_osds:
+            self.out_osd(osd)
+        if self.ceph_objectstore_tool:
+            self.log("Testing ceph-objectstore-tool on down osd")
+            remote = self.ceph_manager.find_remote('osd', osd)
+            FSPATH = self.ceph_manager.get_filepath()
+            JPATH = os.path.join(FSPATH, "journal")
+            exp_osd = imp_osd = osd
+            exp_remote = imp_remote = remote
+            # If an older osd is available we'll move a pg from there
+            if (len(self.dead_osds) > 1 and
+                    random.random() < self.chance_move_pg):
+                exp_osd = random.choice(self.dead_osds[:-1])
+                exp_remote = self.ceph_manager.find_remote('osd', exp_osd)
+            if ('keyvaluestore_backend' in
+                    self.ceph_manager.ctx.ceph[self.cluster].conf['osd']):
+                prefix = ("sudo adjust-ulimits ceph-objectstore-tool "
+                          "--data-path {fpath} --journal-path {jpath} "
+                          "--type keyvaluestore "
+                          "--log-file="
+                          "/var/log/ceph/objectstore_tool.\\$pid.log ".
+                          format(fpath=FSPATH, jpath=JPATH))
+            else:
+                prefix = ("sudo adjust-ulimits ceph-objectstore-tool "
+                          "--data-path {fpath} --journal-path {jpath} "
+                          "--log-file="
+                          "/var/log/ceph/objectstore_tool.\\$pid.log ".
+                          format(fpath=FSPATH, jpath=JPATH))
+            cmd = (prefix + "--op list-pgs").format(id=exp_osd)
+
+            # ceph-objectstore-tool might be temporarily absent during an 
+            # upgrade - see http://tracker.ceph.com/issues/18014
+            with safe_while(sleep=15, tries=40, action="type ceph-objectstore-tool") as proceed:
+                while proceed():
+                    proc = exp_remote.run(args=['type', 'ceph-objectstore-tool'], 
+                               wait=True, check_status=False, stdout=StringIO(),
+                               stderr=StringIO())
+                    if proc.exitstatus == 0:
+                        break
+                    log.debug("ceph-objectstore-tool binary not present, trying again")
+
+            # ceph-objectstore-tool might bogusly fail with "OSD has the store locked"
+            # see http://tracker.ceph.com/issues/19556
+            with safe_while(sleep=15, tries=40, action="ceph-objectstore-tool --op list-pgs") as proceed:
+                while proceed():
+                    proc = exp_remote.run(args=cmd, wait=True,
+                                          check_status=False,
+                                          stdout=StringIO(), stderr=StringIO())
+                    if proc.exitstatus == 0:
+                        break
+                    elif proc.exitstatus == 1 and proc.stderr == "OSD has the store locked":
+                        continue
+                    else:
+                        raise Exception("ceph-objectstore-tool: "
+                                        "exp list-pgs failure with status {ret}".
+                                        format(ret=proc.exitstatus))
+
+            pgs = proc.stdout.getvalue().split('\n')[:-1]
+            if len(pgs) == 0:
+                self.log("No PGs found for osd.{osd}".format(osd=exp_osd))
+                return
+            pg = random.choice(pgs)
+            exp_path = teuthology.get_testdir(self.ceph_manager.ctx)
+            exp_path = os.path.join(exp_path, '{0}.data'.format(self.cluster))
+            exp_path = os.path.join(exp_path,
+                                    "exp.{pg}.{id}".format(
+                                        pg=pg,
+                                        id=exp_osd))
+            # export
+            # Can't use new export-remove op since this is part of upgrade testing
+            cmd = prefix + "--op export --pgid {pg} --file {file}"
+            cmd = cmd.format(id=exp_osd, pg=pg, file=exp_path)
+            proc = exp_remote.run(args=cmd)
+            if proc.exitstatus:
+                raise Exception("ceph-objectstore-tool: "
+                                "export failure with status {ret}".
+                                format(ret=proc.exitstatus))
+            # remove
+            cmd = prefix + "--force --op remove --pgid {pg}"
+            cmd = cmd.format(id=exp_osd, pg=pg)
+            proc = exp_remote.run(args=cmd)
+            if proc.exitstatus:
+                raise Exception("ceph-objectstore-tool: "
+                                "remove failure with status {ret}".
+                                format(ret=proc.exitstatus))
+            # If there are at least 2 dead osds we might move the pg
+            if exp_osd != imp_osd:
+                # If pg isn't already on this osd, then we will move it there
+                cmd = (prefix + "--op list-pgs").format(id=imp_osd)
+                proc = imp_remote.run(args=cmd, wait=True,
+                                      check_status=False, stdout=StringIO())
+                if proc.exitstatus:
+                    raise Exception("ceph-objectstore-tool: "
+                                    "imp list-pgs failure with status {ret}".
+                                    format(ret=proc.exitstatus))
+                pgs = proc.stdout.getvalue().split('\n')[:-1]
+                if pg not in pgs:
+                    self.log("Moving pg {pg} from osd.{fosd} to osd.{tosd}".
+                             format(pg=pg, fosd=exp_osd, tosd=imp_osd))
+                    if imp_remote != exp_remote:
+                        # Copy export file to the other machine
+                        self.log("Transfer export file from {srem} to {trem}".
+                                 format(srem=exp_remote, trem=imp_remote))
+                        tmpexport = Remote.get_file(exp_remote, exp_path)
+                        Remote.put_file(imp_remote, tmpexport, exp_path)
+                        os.remove(tmpexport)
+                else:
+                    # Can't move the pg after all
+                    imp_osd = exp_osd
+                    imp_remote = exp_remote
+            # import
+            cmd = (prefix + "--op import --file {file}")
+            cmd = cmd.format(id=imp_osd, file=exp_path)
+            proc = imp_remote.run(args=cmd, wait=True, check_status=False,
+                                  stderr=StringIO())
+            if proc.exitstatus == 1:
+                bogosity = "The OSD you are using is older than the exported PG"
+                if bogosity in proc.stderr.getvalue():
+                    self.log("OSD older than exported PG"
+                             "...ignored")
+            elif proc.exitstatus == 10:
+                self.log("Pool went away before processing an import"
+                         "...ignored")
+            elif proc.exitstatus == 11:
+                self.log("Attempt to import an incompatible export"
+                         "...ignored")
+            elif proc.exitstatus:
+                raise Exception("ceph-objectstore-tool: "
+                                "import failure with status {ret}".
+                                format(ret=proc.exitstatus))
+            cmd = "rm -f {file}".format(file=exp_path)
+            exp_remote.run(args=cmd)
+            if imp_remote != exp_remote:
+                imp_remote.run(args=cmd)
+
+            # apply low split settings to each pool
+            for pool in self.ceph_manager.list_pools():
+                no_sudo_prefix = prefix[5:]
+                cmd = ("CEPH_ARGS='--filestore-merge-threshold 1 "
+                       "--filestore-split-multiple 1' sudo -E "
+                       + no_sudo_prefix + "--op apply-layout-settings --pool " + pool).format(id=osd)
+                proc = remote.run(args=cmd, wait=True, check_status=False, stderr=StringIO())
+                output = proc.stderr.getvalue()
+                if 'Couldn\'t find pool' in output:
+                    continue
+                if proc.exitstatus:
+                    raise Exception("ceph-objectstore-tool apply-layout-settings"
+                                    " failed with {status}".format(status=proc.exitstatus))
+
+    def rm_past_intervals(self, osd=None):
+        """
+        :param osd: Osd to find pg to remove past intervals
+        """
+        if self.test_rm_past_intervals:
+            if osd is None:
+                osd = random.choice(self.dead_osds)
+            self.log("Use ceph_objectstore_tool to remove past intervals")
+            remote = self.ceph_manager.find_remote('osd', osd)
+            FSPATH = self.ceph_manager.get_filepath()
+            JPATH = os.path.join(FSPATH, "journal")
+            if ('keyvaluestore_backend' in
+                    self.ceph_manager.ctx.ceph[self.cluster].conf['osd']):
+                prefix = ("sudo adjust-ulimits ceph-objectstore-tool "
+                          "--data-path {fpath} --journal-path {jpath} "
+                          "--type keyvaluestore "
+                          "--log-file="
+                          "/var/log/ceph/objectstore_tool.\\$pid.log ".
+                          format(fpath=FSPATH, jpath=JPATH))
+            else:
+                prefix = ("sudo adjust-ulimits ceph-objectstore-tool "
+                          "--data-path {fpath} --journal-path {jpath} "
+                          "--log-file="
+                          "/var/log/ceph/objectstore_tool.\\$pid.log ".
+                          format(fpath=FSPATH, jpath=JPATH))
+            cmd = (prefix + "--op list-pgs").format(id=osd)
+            proc = remote.run(args=cmd, wait=True,
+                              check_status=False, stdout=StringIO())
+            if proc.exitstatus:
+                raise Exception("ceph_objectstore_tool: "
+                                "exp list-pgs failure with status {ret}".
+                                format(ret=proc.exitstatus))
+            pgs = proc.stdout.getvalue().split('\n')[:-1]
+            if len(pgs) == 0:
+                self.log("No PGs found for osd.{osd}".format(osd=osd))
+                return
+            pg = random.choice(pgs)
+            cmd = (prefix + "--op rm-past-intervals --pgid {pg}").\
+                format(id=osd, pg=pg)
+            proc = remote.run(args=cmd)
+            if proc.exitstatus:
+                raise Exception("ceph_objectstore_tool: "
+                                "rm-past-intervals failure with status {ret}".
+                                format(ret=proc.exitstatus))
+
+    def blackhole_kill_osd(self, osd=None):
+        """
+        If all else fails, kill the osd.
+        :param osd: Osd to be killed.
+        """
+        if osd is None:
+            osd = random.choice(self.live_osds)
+        self.log("Blackholing and then killing osd %s, live_osds are %s" %
+                 (str(osd), str(self.live_osds)))
+        self.live_osds.remove(osd)
+        self.dead_osds.append(osd)
+        self.ceph_manager.blackhole_kill_osd(osd)
+
+    def revive_osd(self, osd=None, skip_admin_check=False):
+        """
+        Revive the osd.
+        :param osd: Osd to be revived.
+        """
+        if osd is None:
+            osd = random.choice(self.dead_osds)
+        self.log("Reviving osd %s" % (str(osd),))
+        self.ceph_manager.revive_osd(
+            osd,
+            self.revive_timeout,
+            skip_admin_check=skip_admin_check)
+        self.dead_osds.remove(osd)
+        self.live_osds.append(osd)
+        if self.random_eio > 0 and osd is self.rerrosd:
+            self.ceph_manager.raw_cluster_cmd('tell', 'osd.'+str(self.rerrosd),
+                          'injectargs', '--', '--filestore_debug_random_read_err='+str(self.random_eio))
+            self.ceph_manager.raw_cluster_cmd('tell', 'osd.'+str(self.rerrosd),
+                          'injectargs', '--', '--bluestore_debug_random_read_err='+str(self.random_eio))
+
+
+    def out_osd(self, osd=None):
+        """
+        Mark the osd out
+        :param osd: Osd to be marked.
+        """
+        if osd is None:
+            osd = random.choice(self.in_osds)
+        self.log("Removing osd %s, in_osds are: %s" %
+                 (str(osd), str(self.in_osds)))
+        self.ceph_manager.mark_out_osd(osd)
+        self.in_osds.remove(osd)
+        self.out_osds.append(osd)
+
+    def in_osd(self, osd=None):
+        """
+        Mark the osd out
+        :param osd: Osd to be marked.
+        """
+        if osd is None:
+            osd = random.choice(self.out_osds)
+        if osd in self.dead_osds:
+            return self.revive_osd(osd)
+        self.log("Adding osd %s" % (str(osd),))
+        self.out_osds.remove(osd)
+        self.in_osds.append(osd)
+        self.ceph_manager.mark_in_osd(osd)
+        self.log("Added osd %s" % (str(osd),))
+
+    def reweight_osd_or_by_util(self, osd=None):
+        """
+        Reweight an osd that is in
+        :param osd: Osd to be marked.
+        """
+        if osd is not None or random.choice([True, False]):
+            if osd is None:
+                osd = random.choice(self.in_osds)
+            val = random.uniform(.1, 1.0)
+            self.log("Reweighting osd %s to %s" % (str(osd), str(val)))
+            self.ceph_manager.raw_cluster_cmd('osd', 'reweight',
+                                              str(osd), str(val))
+        else:
+            # do it several times, the option space is large
+            for i in range(5):
+                options = {
+                    'max_change': random.choice(['0.05', '1.0', '3.0']),
+                    'overage': random.choice(['110', '1000']),
+                    'type': random.choice([
+                        'reweight-by-utilization',
+                        'test-reweight-by-utilization']),
+                }
+                self.log("Reweighting by: %s"%(str(options),))
+                self.ceph_manager.raw_cluster_cmd(
+                    'osd',
+                    options['type'],
+                    options['overage'],
+                    options['max_change'])
+
+    def primary_affinity(self, osd=None):
+        if osd is None:
+            osd = random.choice(self.in_osds)
+        if random.random() >= .5:
+            pa = random.random()
+        elif random.random() >= .5:
+            pa = 1
+        else:
+            pa = 0
+        self.log('Setting osd %s primary_affinity to %f' % (str(osd), pa))
+        self.ceph_manager.raw_cluster_cmd('osd', 'primary-affinity',
+                                          str(osd), str(pa))
+
+    def thrash_cluster_full(self):
+        """
+        Set and unset cluster full condition
+        """
+        self.log('Setting full ratio to .001')
+        self.ceph_manager.raw_cluster_cmd('osd', 'set-full-ratio', '.001')
+        time.sleep(1)
+        self.log('Setting full ratio back to .95')
+        self.ceph_manager.raw_cluster_cmd('osd', 'set-full-ratio', '.95')
+
+    def thrash_pg_upmap(self):
+        """
+        Install or remove random pg_upmap entries in OSDMap
+        """
+        from random import shuffle
+        out = self.ceph_manager.raw_cluster_cmd('osd', 'dump', '-f', 'json-pretty')
+        j = json.loads(out)
+        self.log('j is %s' % j)
+        try:
+            if random.random() >= .3:
+                pgs = self.ceph_manager.get_pg_stats()
+                pg = random.choice(pgs)
+                pgid = str(pg['pgid'])
+                poolid = int(pgid.split('.')[0])
+                sizes = [x['size'] for x in j['pools'] if x['pool'] == poolid]
+                if len(sizes) == 0:
+                    return
+                n = sizes[0]
+                osds = self.in_osds + self.out_osds
+                shuffle(osds)
+                osds = osds[0:n]
+                self.log('Setting %s to %s' % (pgid, osds))
+                cmd = ['osd', 'pg-upmap', pgid] + [str(x) for x in osds]
+                self.log('cmd %s' % cmd)
+                self.ceph_manager.raw_cluster_cmd(*cmd)
+            else:
+                m = j['pg_upmap']
+                if len(m) > 0:
+                    shuffle(m)
+                    pg = m[0]['pgid']
+                    self.log('Clearing pg_upmap on %s' % pg)
+                    self.ceph_manager.raw_cluster_cmd(
+                        'osd',
+                        'rm-pg-upmap',
+                        pg)
+                else:
+                    self.log('No pg_upmap entries; doing nothing')
+        except CommandFailedError:
+            self.log('Failed to rm-pg-upmap, ignoring')
+
+    def thrash_pg_upmap_items(self):
+        """
+        Install or remove random pg_upmap_items entries in OSDMap
+        """
+        from random import shuffle
+        out = self.ceph_manager.raw_cluster_cmd('osd', 'dump', '-f', 'json-pretty')
+        j = json.loads(out)
+        self.log('j is %s' % j)
+        try:
+            if random.random() >= .3:
+                pgs = self.ceph_manager.get_pg_stats()
+                pg = random.choice(pgs)
+                pgid = str(pg['pgid'])
+                poolid = int(pgid.split('.')[0])
+                sizes = [x['size'] for x in j['pools'] if x['pool'] == poolid]
+                if len(sizes) == 0:
+                    return
+                n = sizes[0]
+                osds = self.in_osds + self.out_osds
+                shuffle(osds)
+                osds = osds[0:n*2]
+                self.log('Setting %s to %s' % (pgid, osds))
+                cmd = ['osd', 'pg-upmap-items', pgid] + [str(x) for x in osds]
+                self.log('cmd %s' % cmd)
+                self.ceph_manager.raw_cluster_cmd(*cmd)
+            else:
+                m = j['pg_upmap_items']
+                if len(m) > 0:
+                    shuffle(m)
+                    pg = m[0]['pgid']
+                    self.log('Clearing pg_upmap on %s' % pg)
+                    self.ceph_manager.raw_cluster_cmd(
+                        'osd',
+                        'rm-pg-upmap-items',
+                        pg)
+                else:
+                    self.log('No pg_upmap entries; doing nothing')
+        except CommandFailedError:
+            self.log('Failed to rm-pg-upmap-items, ignoring')
+
+    def force_recovery(self):
+        """
+        Force recovery on some of PGs
+        """
+        backfill = random.random() >= 0.5
+        j = self.ceph_manager.get_pgids_to_force(backfill)
+        if j:
+            if backfill:
+                self.ceph_manager.raw_cluster_cmd('pg', 'force-backfill', *j)
+            else:
+                self.ceph_manager.raw_cluster_cmd('pg', 'force-recovery', *j)
+
+    def cancel_force_recovery(self):
+        """
+        Force recovery on some of PGs
+        """
+        backfill = random.random() >= 0.5
+        j = self.ceph_manager.get_pgids_to_cancel_force(backfill)
+        if j:
+            if backfill:
+                self.ceph_manager.raw_cluster_cmd('pg', 'cancel-force-backfill', *j)
+            else:
+                self.ceph_manager.raw_cluster_cmd('pg', 'cancel-force-recovery', *j)
+
+    def force_cancel_recovery(self):
+        """
+        Force or cancel forcing recovery
+        """
+        if random.random() >= 0.4:
+           self.force_recovery()
+        else:
+           self.cancel_force_recovery()
+
+    def all_up(self):
+        """
+        Make sure all osds are up and not out.
+        """
+        while len(self.dead_osds) > 0:
+            self.log("reviving osd")
+            self.revive_osd()
+        while len(self.out_osds) > 0:
+            self.log("inning osd")
+            self.in_osd()
+
+    def all_up_in(self):
+        """
+        Make sure all osds are up and fully in.
+        """
+        self.all_up();
+        for osd in self.live_osds:
+            self.ceph_manager.raw_cluster_cmd('osd', 'reweight',
+                                              str(osd), str(1))
+            self.ceph_manager.raw_cluster_cmd('osd', 'primary-affinity',
+                                              str(osd), str(1))
+
+    def do_join(self):
+        """
+        Break out of this Ceph loop
+        """
+        self.stopping = True
+        self.thread.get()
+        if self.sighup_delay:
+            self.log("joining the do_sighup greenlet")
+            self.sighup_thread.get()
+        if self.optrack_toggle_delay:
+            self.log("joining the do_optrack_toggle greenlet")
+            self.optrack_toggle_thread.join()
+        if self.dump_ops_enable == "true":
+            self.log("joining the do_dump_ops greenlet")
+            self.dump_ops_thread.join()
+        if self.noscrub_toggle_delay:
+            self.log("joining the do_noscrub_toggle greenlet")
+            self.noscrub_toggle_thread.join()
+
+    def grow_pool(self):
+        """
+        Increase the size of the pool
+        """
+        pool = self.ceph_manager.get_pool()
+        orig_pg_num = self.ceph_manager.get_pool_pg_num(pool)
+        self.log("Growing pool %s" % (pool,))
+        if self.ceph_manager.expand_pool(pool,
+                                         self.config.get('pool_grow_by', 10),
+                                         self.max_pgs):
+            self.pools_to_fix_pgp_num.add(pool)
+
+    def fix_pgp_num(self, pool=None):
+        """
+        Fix number of pgs in pool.
+        """
+        if pool is None:
+            pool = self.ceph_manager.get_pool()
+            force = False
+        else:
+            force = True
+        self.log("fixing pg num pool %s" % (pool,))
+        if self.ceph_manager.set_pool_pgpnum(pool, force):
+            self.pools_to_fix_pgp_num.discard(pool)
+
+    def test_pool_min_size(self):
+        """
+        Kill and revive all osds except one.
+        """
+        self.log("test_pool_min_size")
+        self.all_up()
+        self.ceph_manager.wait_for_recovery(
+            timeout=self.config.get('timeout')
+            )
+        the_one = random.choice(self.in_osds)
+        self.log("Killing everyone but %s", the_one)
+        to_kill = filter(lambda x: x != the_one, self.in_osds)
+        [self.kill_osd(i) for i in to_kill]
+        [self.out_osd(i) for i in to_kill]
+        time.sleep(self.config.get("test_pool_min_size_time", 10))
+        self.log("Killing %s" % (the_one,))
+        self.kill_osd(the_one)
+        self.out_osd(the_one)
+        self.log("Reviving everyone but %s" % (the_one,))
+        [self.revive_osd(i) for i in to_kill]
+        [self.in_osd(i) for i in to_kill]
+        self.log("Revived everyone but %s" % (the_one,))
+        self.log("Waiting for clean")
+        self.ceph_manager.wait_for_recovery(
+            timeout=self.config.get('timeout')
+            )
+
+    def inject_pause(self, conf_key, duration, check_after, should_be_down):
+        """
+        Pause injection testing. Check for osd being down when finished.
+        """
+        the_one = random.choice(self.live_osds)
+        self.log("inject_pause on {osd}".format(osd=the_one))
+        self.log(
+            "Testing {key} pause injection for duration {duration}".format(
+                key=conf_key,
+                duration=duration
+                ))
+        self.log(
+            "Checking after {after}, should_be_down={shouldbedown}".format(
+                after=check_after,
+                shouldbedown=should_be_down
+                ))
+        self.ceph_manager.set_config(the_one, **{conf_key: duration})
+        if not should_be_down:
+            return
+        time.sleep(check_after)
+        status = self.ceph_manager.get_osd_status()
+        assert the_one in status['down']
+        time.sleep(duration - check_after + 20)
+        status = self.ceph_manager.get_osd_status()
+        assert not the_one in status['down']
+
+    def test_backfill_full(self):
+        """
+        Test backfills stopping when the replica fills up.
+
+        First, use injectfull admin command to simulate a now full
+        osd by setting it to 0 on all of the OSDs.
+
+        Second, on a random subset, set
+        osd_debug_skip_full_check_in_backfill_reservation to force
+        the more complicated check in do_scan to be exercised.
+
+        Then, verify that all backfillings stop.
+        """
+        self.log("injecting backfill full")
+        for i in self.live_osds:
+            self.ceph_manager.set_config(
+                i,
+                osd_debug_skip_full_check_in_backfill_reservation=
+                random.choice(['false', 'true']))
+            self.ceph_manager.osd_admin_socket(i, command=['injectfull', 'backfillfull'],
+                                     check_status=True, timeout=30, stdout=DEVNULL)
+        for i in range(30):
+            status = self.ceph_manager.compile_pg_status()
+            if 'backfilling' not in status.keys():
+                break
+            self.log(
+                "waiting for {still_going} backfillings".format(
+                    still_going=status.get('backfilling')))
+            time.sleep(1)
+        assert('backfilling' not in self.ceph_manager.compile_pg_status().keys())
+        for i in self.live_osds:
+            self.ceph_manager.set_config(
+                i,
+                osd_debug_skip_full_check_in_backfill_reservation='false')
+            self.ceph_manager.osd_admin_socket(i, command=['injectfull', 'none'],
+                                     check_status=True, timeout=30, stdout=DEVNULL)
+
+    def test_map_discontinuity(self):
+        """
+        1) Allows the osds to recover
+        2) kills an osd
+        3) allows the remaining osds to recover
+        4) waits for some time
+        5) revives the osd
+        This sequence should cause the revived osd to have to handle
+        a map gap since the mons would have trimmed
+        """
+        while len(self.in_osds) < (self.minin + 1):
+            self.in_osd()
+        self.log("Waiting for recovery")
+        self.ceph_manager.wait_for_all_osds_up(
+            timeout=self.config.get('timeout')
+            )
+        # now we wait 20s for the pg status to change, if it takes longer,
+        # the test *should* fail!
+        time.sleep(20)
+        self.ceph_manager.wait_for_clean(
+            timeout=self.config.get('timeout')
+            )
+
+        # now we wait 20s for the backfill replicas to hear about the clean
+        time.sleep(20)
+        self.log("Recovered, killing an osd")
+        self.kill_osd(mark_down=True, mark_out=True)
+        self.log("Waiting for clean again")
+        self.ceph_manager.wait_for_clean(
+            timeout=self.config.get('timeout')
+            )
+        self.log("Waiting for trim")
+        time.sleep(int(self.config.get("map_discontinuity_sleep_time", 40)))
+        self.revive_osd()
+
+    def choose_action(self):
+        """
+        Random action selector.
+        """
+        chance_down = self.config.get('chance_down', 0.4)
+        chance_test_min_size = self.config.get('chance_test_min_size', 0)
+        chance_test_backfill_full = \
+            self.config.get('chance_test_backfill_full', 0)
+        if isinstance(chance_down, int):
+            chance_down = float(chance_down) / 100
+        minin = self.minin
+        minout = self.config.get("min_out", 0)
+        minlive = self.config.get("min_live", 2)
+        mindead = self.config.get("min_dead", 0)
+
+        self.log('choose_action: min_in %d min_out '
+                 '%d min_live %d min_dead %d' %
+                 (minin, minout, minlive, mindead))
+        actions = []
+        if len(self.in_osds) > minin:
+            actions.append((self.out_osd, 1.0,))
+        if len(self.live_osds) > minlive and chance_down > 0:
+            actions.append((self.kill_osd, chance_down,))
+        if len(self.dead_osds) > 1:
+            actions.append((self.rm_past_intervals, 1.0,))
+        if len(self.out_osds) > minout:
+            actions.append((self.in_osd, 1.7,))
+        if len(self.dead_osds) > mindead:
+            actions.append((self.revive_osd, 1.0,))
+        if self.config.get('thrash_primary_affinity', True):
+            actions.append((self.primary_affinity, 1.0,))
+        actions.append((self.reweight_osd_or_by_util,
+                        self.config.get('reweight_osd', .5),))
+        actions.append((self.grow_pool,
+                        self.config.get('chance_pgnum_grow', 0),))
+        actions.append((self.fix_pgp_num,
+                        self.config.get('chance_pgpnum_fix', 0),))
+        actions.append((self.test_pool_min_size,
+                        chance_test_min_size,))
+        actions.append((self.test_backfill_full,
+                        chance_test_backfill_full,))
+        if self.chance_thrash_cluster_full > 0:
+            actions.append((self.thrash_cluster_full, self.chance_thrash_cluster_full,))
+        if self.chance_thrash_pg_upmap > 0:
+            actions.append((self.thrash_pg_upmap, self.chance_thrash_pg_upmap,))
+        if self.chance_thrash_pg_upmap_items > 0:
+            actions.append((self.thrash_pg_upmap_items, self.chance_thrash_pg_upmap_items,))
+        if self.chance_force_recovery > 0:
+            actions.append((self.force_cancel_recovery, self.chance_force_recovery))
+
+        for key in ['heartbeat_inject_failure', 'filestore_inject_stall']:
+            for scenario in [
+                (lambda:
+                 self.inject_pause(key,
+                                   self.config.get('pause_short', 3),
+                                   0,
+                                   False),
+                 self.config.get('chance_inject_pause_short', 1),),
+                (lambda:
+                 self.inject_pause(key,
+                                   self.config.get('pause_long', 80),
+                                   self.config.get('pause_check_after', 70),
+                                   True),
+                 self.config.get('chance_inject_pause_long', 0),)]:
+                actions.append(scenario)
+
+        total = sum([y for (x, y) in actions])
+        val = random.uniform(0, total)
+        for (action, prob) in actions:
+            if val < prob:
+                return action
+            val -= prob
+        return None
+
+    def log_exc(func):
+        @wraps(func)
+        def wrapper(self):
+            try:
+                return func(self)
+            except:
+                self.log(traceback.format_exc())
+                raise
+        return wrapper
+
+    @log_exc
+    def do_sighup(self):
+        """
+        Loops and sends signal.SIGHUP to a random live osd.
+
+        Loop delay is controlled by the config value sighup_delay.
+        """
+        delay = float(self.sighup_delay)
+        self.log("starting do_sighup with a delay of {0}".format(delay))
+        while not self.stopping:
+            osd = random.choice(self.live_osds)
+            self.ceph_manager.signal_osd(osd, signal.SIGHUP, silent=True)
+            time.sleep(delay)
+
+    @log_exc
+    def do_optrack_toggle(self):
+        """
+        Loops and toggle op tracking to all osds.
+
+        Loop delay is controlled by the config value optrack_toggle_delay.
+        """
+        delay = float(self.optrack_toggle_delay)
+        osd_state = "true"
+        self.log("starting do_optrack_toggle with a delay of {0}".format(delay))
+        while not self.stopping:
+            if osd_state == "true":
+                osd_state = "false"
+            else:
+                osd_state = "true"
+            self.ceph_manager.raw_cluster_cmd_result('tell', 'osd.*',
+                             'injectargs', '--osd_enable_op_tracker=%s' % osd_state)
+            gevent.sleep(delay)
+
+    @log_exc
+    def do_dump_ops(self):
+        """
+        Loops and does op dumps on all osds
+        """
+        self.log("starting do_dump_ops")
+        while not self.stopping:
+            for osd in self.live_osds:
+                # Ignore errors because live_osds is in flux
+                self.ceph_manager.osd_admin_socket(osd, command=['dump_ops_in_flight'],
+                                     check_status=False, timeout=30, stdout=DEVNULL)
+                self.ceph_manager.osd_admin_socket(osd, command=['dump_blocked_ops'],
+                                     check_status=False, timeout=30, stdout=DEVNULL)
+                self.ceph_manager.osd_admin_socket(osd, command=['dump_historic_ops'],
+                                     check_status=False, timeout=30, stdout=DEVNULL)
+            gevent.sleep(0)
+
+    @log_exc
+    def do_noscrub_toggle(self):
+        """
+        Loops and toggle noscrub flags
+
+        Loop delay is controlled by the config value noscrub_toggle_delay.
+        """
+        delay = float(self.noscrub_toggle_delay)
+        scrub_state = "none"
+        self.log("starting do_noscrub_toggle with a delay of {0}".format(delay))
+        while not self.stopping:
+            if scrub_state == "none":
+                self.ceph_manager.raw_cluster_cmd('osd', 'set', 'noscrub')
+                scrub_state = "noscrub"
+            elif scrub_state == "noscrub":
+                self.ceph_manager.raw_cluster_cmd('osd', 'set', 'nodeep-scrub')
+                scrub_state = "both"
+            elif scrub_state == "both":
+                self.ceph_manager.raw_cluster_cmd('osd', 'unset', 'noscrub')
+                scrub_state = "nodeep-scrub"
+            else:
+                self.ceph_manager.raw_cluster_cmd('osd', 'unset', 'nodeep-scrub')
+                scrub_state = "none"
+            gevent.sleep(delay)
+        self.ceph_manager.raw_cluster_cmd('osd', 'unset', 'noscrub')
+        self.ceph_manager.raw_cluster_cmd('osd', 'unset', 'nodeep-scrub')
+
+    @log_exc
+    def do_thrash(self):
+        """
+        Loop to select random actions to thrash ceph manager with.
+        """
+        cleanint = self.config.get("clean_interval", 60)
+        scrubint = self.config.get("scrub_interval", -1)
+        maxdead = self.config.get("max_dead", 0)
+        delay = self.config.get("op_delay", 5)
+        self.rerrosd = self.live_osds[0]
+        if self.random_eio > 0:
+            self.ceph_manager.raw_cluster_cmd('tell', 'osd.'+str(self.rerrosd),
+                          'injectargs', '--', '--filestore_debug_random_read_err='+str(self.random_eio))
+            self.ceph_manager.raw_cluster_cmd('tell', 'osd.'+str(self.rerrosd),
+                          'injectargs', '--', '--bluestore_debug_random_read_err='+str(self.random_eio))
+        self.log("starting do_thrash")
+        while not self.stopping:
+            to_log = [str(x) for x in ["in_osds: ", self.in_osds,
+                                       "out_osds: ", self.out_osds,
+                                       "dead_osds: ", self.dead_osds,
+                                       "live_osds: ", self.live_osds]]
+            self.log(" ".join(to_log))
+            if random.uniform(0, 1) < (float(delay) / cleanint):
+                while len(self.dead_osds) > maxdead:
+                    self.revive_osd()
+                for osd in self.in_osds:
+                    self.ceph_manager.raw_cluster_cmd('osd', 'reweight',
+                                                      str(osd), str(1))
+                if random.uniform(0, 1) < float(
+                        self.config.get('chance_test_map_discontinuity', 0)):
+                    self.test_map_discontinuity()
+                else:
+                    self.ceph_manager.wait_for_recovery(
+                        timeout=self.config.get('timeout')
+                        )
+                time.sleep(self.clean_wait)
+                if scrubint > 0:
+                    if random.uniform(0, 1) < (float(delay) / scrubint):
+                        self.log('Scrubbing while thrashing being performed')
+                        Scrubber(self.ceph_manager, self.config)
+            self.choose_action()()
+            time.sleep(delay)
+        self.all_up()
+        if self.random_eio > 0:
+            self.ceph_manager.raw_cluster_cmd('tell', 'osd.'+str(self.rerrosd),
+                          'injectargs', '--', '--filestore_debug_random_read_err=0.0')
+            self.ceph_manager.raw_cluster_cmd('tell', 'osd.'+str(self.rerrosd),
+                          'injectargs', '--', '--bluestore_debug_random_read_err=0.0')
+        for pool in list(self.pools_to_fix_pgp_num):
+            if self.ceph_manager.get_pool_pg_num(pool) > 0:
+                self.fix_pgp_num(pool)
+        self.pools_to_fix_pgp_num.clear()
+        for service, opt, saved_value in self.saved_options:
+            self._set_config(service, '*', opt, saved_value)
+        self.saved_options = []
+        self.all_up_in()
+
+
+class ObjectStoreTool:
+
+    def __init__(self, manager, pool, **kwargs):
+        self.manager = manager
+        self.pool = pool
+        self.osd = kwargs.get('osd', None)
+        self.object_name = kwargs.get('object_name', None)
+        self.do_revive = kwargs.get('do_revive', True)
+        if self.osd and self.pool and self.object_name:
+            if self.osd == "primary":
+                self.osd = self.manager.get_object_primary(self.pool,
+                                                           self.object_name)
+        assert self.osd
+        if self.object_name:
+            self.pgid = self.manager.get_object_pg_with_shard(self.pool,
+                                                              self.object_name,
+                                                              self.osd)
+        self.remote = self.manager.ctx.\
+            cluster.only('osd.{o}'.format(o=self.osd)).remotes.keys()[0]
+        path = self.manager.get_filepath().format(id=self.osd)
+        self.paths = ("--data-path {path} --journal-path {path}/journal".
+                      format(path=path))
+
+    def build_cmd(self, options, args, stdin):
+        lines = []
+        if self.object_name:
+            lines.append("object=$(sudo adjust-ulimits ceph-objectstore-tool "
+                         "{paths} --pgid {pgid} --op list |"
+                         "grep '\"oid\":\"{name}\"')".
+                         format(paths=self.paths,
+                                pgid=self.pgid,
+                                name=self.object_name))
+            args = '"$object" ' + args
+            options += " --pgid {pgid}".format(pgid=self.pgid)
+        cmd = ("sudo adjust-ulimits ceph-objectstore-tool {paths} {options} {args}".
+               format(paths=self.paths,
+                      args=args,
+                      options=options))
+        if stdin:
+            cmd = ("echo {payload} | base64 --decode | {cmd}".
+                   format(payload=base64.encode(stdin),
+                          cmd=cmd))
+        lines.append(cmd)
+        return "\n".join(lines)
+
+    def run(self, options, args, stdin=None, stdout=None):
+        if stdout is None:
+            stdout = StringIO()
+        self.manager.kill_osd(self.osd)
+        cmd = self.build_cmd(options, args, stdin)
+        self.manager.log(cmd)
+        try:
+            proc = self.remote.run(args=['bash', '-e', '-x', '-c', cmd],
+                                   check_status=False,
+                                   stdout=stdout,
+                                   stderr=StringIO())
+            proc.wait()
+            if proc.exitstatus != 0:
+                self.manager.log("failed with " + str(proc.exitstatus))
+                error = proc.stdout.getvalue() + " " + proc.stderr.getvalue()
+                raise Exception(error)
+        finally:
+            if self.do_revive:
+                self.manager.revive_osd(self.osd)
+                self.manager.wait_till_osd_is_up(self.osd, 300)
+
+
+class CephManager:
+    """
+    Ceph manager object.
+    Contains several local functions that form a bulk of this module.
+
+    Note: this class has nothing to do with the Ceph daemon (ceph-mgr) of
+    the same name.
+    """
+
+    REPLICATED_POOL = 1
+    ERASURE_CODED_POOL = 3
+
+    def __init__(self, controller, ctx=None, config=None, logger=None,
+                 cluster='ceph'):
+        self.lock = threading.RLock()
+        self.ctx = ctx
+        self.config = config
+        self.controller = controller
+        self.next_pool_id = 0
+        self.cluster = cluster
+        if (logger):
+            self.log = lambda x: logger.info(x)
+        else:
+            def tmp(x):
+                """
+                implement log behavior.
+                """
+                print x
+            self.log = tmp
+        if self.config is None:
+            self.config = dict()
+        pools = self.list_pools()
+        self.pools = {}
+        for pool in pools:
+            # we may race with a pool deletion; ignore failures here
+            try:
+                self.pools[pool] = self.get_pool_property(pool, 'pg_num')
+            except CommandFailedError:
+                self.log('Failed to get pg_num from pool %s, ignoring' % pool)
+
+    def raw_cluster_cmd(self, *args):
+        """
+        Start ceph on a raw cluster.  Return count
+        """
+        testdir = teuthology.get_testdir(self.ctx)
+        ceph_args = [
+            'sudo',
+            'adjust-ulimits',
+            'ceph-coverage',
+            '{tdir}/archive/coverage'.format(tdir=testdir),
+            'timeout',
+            '120',
+            'ceph',
+            '--cluster',
+            self.cluster,
+        ]
+        ceph_args.extend(args)
+        proc = self.controller.run(
+            args=ceph_args,
+            stdout=StringIO(),
+            )
+        return proc.stdout.getvalue()
+
+    def raw_cluster_cmd_result(self, *args):
+        """
+        Start ceph on a cluster.  Return success or failure information.
+        """
+        testdir = teuthology.get_testdir(self.ctx)
+        ceph_args = [
+            'sudo',
+            'adjust-ulimits',
+            'ceph-coverage',
+            '{tdir}/archive/coverage'.format(tdir=testdir),
+            'timeout',
+            '120',
+            'ceph',
+            '--cluster',
+            self.cluster,
+        ]
+        ceph_args.extend(args)
+        proc = self.controller.run(
+            args=ceph_args,
+            check_status=False,
+            )
+        return proc.exitstatus
+
+    def run_ceph_w(self):
+        """
+        Execute "ceph -w" in the background with stdout connected to a StringIO,
+        and return the RemoteProcess.
+        """
+        return self.controller.run(
+            args=["sudo",
+                  "daemon-helper",
+                  "kill",
+                  "ceph",
+                  '--cluster',
+                  self.cluster,
+                  "-w"],
+            wait=False, stdout=StringIO(), stdin=run.PIPE)
+
+    def flush_pg_stats(self, osds, no_wait=None, wait_for_mon=300):
+        """
+        Flush pg stats from a list of OSD ids, ensuring they are reflected
+        all the way to the monitor.  Luminous and later only.
+
+        :param osds: list of OSDs to flush
+        :param no_wait: list of OSDs not to wait for seq id. by default, we
+                        wait for all specified osds, but some of them could be
+                        moved out of osdmap, so we cannot get their updated
+                        stat seq from monitor anymore. in that case, you need
+                        to pass a blacklist.
+        :param wait_for_mon: wait for mon to be synced with mgr. 0 to disable
+                             it. (5 min by default)
+        """
+        seq = {osd: self.raw_cluster_cmd('tell', 'osd.%d' % osd, 'flush_pg_stats')
+               for osd in osds}
+        if not wait_for_mon:
+            return
+        if no_wait is None:
+            no_wait = []
+        for osd, need in seq.iteritems():
+            if osd in no_wait:
+                continue
+            got = 0
+            while wait_for_mon > 0:
+                got = self.raw_cluster_cmd('osd', 'last-stat-seq', 'osd.%d' % osd)
+                self.log('need seq {need} got {got} for osd.{osd}'.format(
+                    need=need, got=got, osd=osd))
+                if got >= need:
+                    break
+                A_WHILE = 1
+                time.sleep(A_WHILE)
+                wait_for_mon -= A_WHILE
+            else:
+                raise Exception('timed out waiting for mon to be updated with '
+                                'osd.{osd}: {got} < {need}'.
+                                format(osd=osd, got=got, need=need))
+
+    def flush_all_pg_stats(self):
+        self.flush_pg_stats(range(len(self.get_osd_dump())))
+
+    def do_rados(self, remote, cmd, check_status=True):
+        """
+        Execute a remote rados command.
+        """
+        testdir = teuthology.get_testdir(self.ctx)
+        pre = [
+            'adjust-ulimits',
+            'ceph-coverage',
+            '{tdir}/archive/coverage'.format(tdir=testdir),
+            'rados',
+            '--cluster',
+            self.cluster,
+            ]
+        pre.extend(cmd)
+        proc = remote.run(
+            args=pre,
+            wait=True,
+            check_status=check_status
+            )
+        return proc
+
+    def rados_write_objects(self, pool, num_objects, size,
+                            timelimit, threads, cleanup=False):
+        """
+        Write rados objects
+        Threads not used yet.
+        """
+        args = [
+            '-p', pool,
+            '--num-objects', num_objects,
+            '-b', size,
+            'bench', timelimit,
+            'write'
+            ]
+        if not cleanup:
+            args.append('--no-cleanup')
+        return self.do_rados(self.controller, map(str, args))
+
+    def do_put(self, pool, obj, fname, namespace=None):
+        """
+        Implement rados put operation
+        """
+        args = ['-p', pool]
+        if namespace is not None:
+            args += ['-N', namespace]
+        args += [
+            'put',
+            obj,
+            fname
+        ]
+        return self.do_rados(
+            self.controller,
+            args,
+            check_status=False
+        ).exitstatus
+
+    def do_get(self, pool, obj, fname='/dev/null', namespace=None):
+        """
+        Implement rados get operation
+        """
+        args = ['-p', pool]
+        if namespace is not None:
+            args += ['-N', namespace]
+        args += [
+            'get',
+            obj,
+            fname
+        ]
+        return self.do_rados(
+            self.controller,
+            args,
+            check_status=False
+        ).exitstatus
+
+    def do_rm(self, pool, obj, namespace=None):
+        """
+        Implement rados rm operation
+        """
+        args = ['-p', pool]
+        if namespace is not None:
+            args += ['-N', namespace]
+        args += [
+            'rm',
+            obj
+        ]
+        return self.do_rados(
+            self.controller,
+            args,
+            check_status=False
+        ).exitstatus
+
+    def osd_admin_socket(self, osd_id, command, check_status=True, timeout=0, stdout=None):
+        if stdout is None:
+            stdout = StringIO()
+        return self.admin_socket('osd', osd_id, command, check_status, timeout, stdout)
+
+    def find_remote(self, service_type, service_id):
+        """
+        Get the Remote for the host where a particular service runs.
+
+        :param service_type: 'mds', 'osd', 'client'
+        :param service_id: The second part of a role, e.g. '0' for
+                           the role 'client.0'
+        :return: a Remote instance for the host where the
+                 requested role is placed
+        """
+        return get_remote(self.ctx, self.cluster,
+                          service_type, service_id)
+
+    def admin_socket(self, service_type, service_id,
+                     command, check_status=True, timeout=0, stdout=None):
+        """
+        Remotely start up ceph specifying the admin socket
+        :param command: a list of words to use as the command
+                        to the admin socket
+        """
+        if stdout is None:
+            stdout = StringIO()
+        testdir = teuthology.get_testdir(self.ctx)
+        remote = self.find_remote(service_type, service_id)
+        args = [
+            'sudo',
+            'adjust-ulimits',
+            'ceph-coverage',
+            '{tdir}/archive/coverage'.format(tdir=testdir),
+            'timeout',
+            str(timeout),
+            'ceph',
+            '--cluster',
+            self.cluster,
+            '--admin-daemon',
+            '/var/run/ceph/{cluster}-{type}.{id}.asok'.format(
+                cluster=self.cluster,
+                type=service_type,
+                id=service_id),
+            ]
+        args.extend(command)
+        return remote.run(
+            args=args,
+            stdout=stdout,
+            wait=True,
+            check_status=check_status
+            )
+
+    def objectstore_tool(self, pool, options, args, **kwargs):
+        return ObjectStoreTool(self, pool, **kwargs).run(options, args)
+
+    def get_pgid(self, pool, pgnum):
+        """
+        :param pool: pool name
+        :param pgnum: pg number
+        :returns: a string representing this pg.
+        """
+        poolnum = self.get_pool_num(pool)
+        pg_str = "{poolnum}.{pgnum}".format(
+            poolnum=poolnum,
+            pgnum=pgnum)
+        return pg_str
+
+    def get_pg_replica(self, pool, pgnum):
+        """
+        get replica for pool, pgnum (e.g. (data, 0)->0
+        """
+        pg_str = self.get_pgid(pool, pgnum)
+        output = self.raw_cluster_cmd("pg", "map", pg_str, '--format=json')
+        j = json.loads('\n'.join(output.split('\n')[1:]))
+        return int(j['acting'][-1])
+        assert False
+
+    def wait_for_pg_stats(func):
+        # both osd_mon_report_interval_min and mgr_stats_period are 5 seconds
+        # by default, and take the faulty injection in ms into consideration,
+        # 12 seconds are more than enough
+        delays = [1, 1, 2, 3, 5, 8, 13]
+        @wraps(func)
+        def wrapper(self, *args, **kwargs):
+            exc = None
+            for delay in delays:
+                try:
+                    return func(self, *args, **kwargs)
+                except AssertionError as e:
+                    time.sleep(delay)
+                    exc = e
+            raise exc
+        return wrapper
+
+    def get_pg_primary(self, pool, pgnum):
+        """
+        get primary for pool, pgnum (e.g. (data, 0)->0
+        """
+        pg_str = self.get_pgid(pool, pgnum)
+        output = self.raw_cluster_cmd("pg", "map", pg_str, '--format=json')
+        j = json.loads('\n'.join(output.split('\n')[1:]))
+        return int(j['acting'][0])
+        assert False
+
+    def get_pool_num(self, pool):
+        """
+        get number for pool (e.g., data -> 2)
+        """
+        return int(self.get_pool_dump(pool)['pool'])
+
+    def list_pools(self):
+        """
+        list all pool names
+        """
+        osd_dump = self.get_osd_dump_json()
+        self.log(osd_dump['pools'])
+        return [str(i['pool_name']) for i in osd_dump['pools']]
+
+    def clear_pools(self):
+        """
+        remove all pools
+        """
+        [self.remove_pool(i) for i in self.list_pools()]
+
+    def kick_recovery_wq(self, osdnum):
+        """
+        Run kick_recovery_wq on cluster.
+        """
+        return self.raw_cluster_cmd(
+            'tell', "osd.%d" % (int(osdnum),),
+            'debug',
+            'kick_recovery_wq',
+            '0')
+
+    def wait_run_admin_socket(self, service_type,
+                              service_id, args=['version'], timeout=75, stdout=None):
+        """
+        If osd_admin_socket call suceeds, return.  Otherwise wait
+        five seconds and try again.
+        """
+        if stdout is None:
+            stdout = StringIO()
+        tries = 0
+        while True:
+            proc = self.admin_socket(service_type, service_id,
+                                     args, check_status=False, stdout=stdout)
+            if proc.exitstatus is 0:
+                return proc
+            else:
+                tries += 1
+                if (tries * 5) > timeout:
+                    raise Exception('timed out waiting for admin_socket '
+                                    'to appear after {type}.{id} restart'.
+                                    format(type=service_type,
+                                           id=service_id))
+                self.log("waiting on admin_socket for {type}-{id}, "
+                         "{command}".format(type=service_type,
+                                            id=service_id,
+                                            command=args))
+                time.sleep(5)
+
+    def get_pool_dump(self, pool):
+        """
+        get the osd dump part of a pool
+        """
+        osd_dump = self.get_osd_dump_json()
+        for i in osd_dump['pools']:
+            if i['pool_name'] == pool:
+                return i
+        assert False
+
+    def get_config(self, service_type, service_id, name):
+        """
+        :param node: like 'mon.a'
+        :param name: the option name
+        """
+        proc = self.wait_run_admin_socket(service_type, service_id,
+                                          ['config', 'show'])
+        j = json.loads(proc.stdout.getvalue())
+        return j[name]
+
+    def set_config(self, osdnum, **argdict):
+        """
+        :param osdnum: osd number
+        :param argdict: dictionary containing values to set.
+        """
+        for k, v in argdict.iteritems():
+            self.wait_run_admin_socket(
+                'osd', osdnum,
+                ['config', 'set', str(k), str(v)])
+
+    def raw_cluster_status(self):
+        """
+        Get status from cluster
+        """
+        status = self.raw_cluster_cmd('status', '--format=json-pretty')
+        return json.loads(status)
+
+    def raw_osd_status(self):
+        """
+        Get osd status from cluster
+        """
+        return self.raw_cluster_cmd('osd', 'dump')
+
+    def get_osd_status(self):
+        """
+        Get osd statuses sorted by states that the osds are in.
+        """
+        osd_lines = filter(
+            lambda x: x.startswith('osd.') and (("up" in x) or ("down" in x)),
+            self.raw_osd_status().split('\n'))
+        self.log(osd_lines)
+        in_osds = [int(i[4:].split()[0])
+                   for i in filter(lambda x: " in " in x, osd_lines)]
+        out_osds = [int(i[4:].split()[0])
+                    for i in filter(lambda x: " out " in x, osd_lines)]
+        up_osds = [int(i[4:].split()[0])
+                   for i in filter(lambda x: " up " in x, osd_lines)]
+        down_osds = [int(i[4:].split()[0])
+                     for i in filter(lambda x: " down " in x, osd_lines)]
+        dead_osds = [int(x.id_)
+                     for x in filter(lambda x:
+                                     not x.running(),
+                                     self.ctx.daemons.
+                                     iter_daemons_of_role('osd', self.cluster))]
+        live_osds = [int(x.id_) for x in
+                     filter(lambda x:
+                            x.running(),
+                            self.ctx.daemons.iter_daemons_of_role('osd',
+                                                                  self.cluster))]
+        return {'in': in_osds, 'out': out_osds, 'up': up_osds,
+                'down': down_osds, 'dead': dead_osds, 'live': live_osds,
+                'raw': osd_lines}
+
+    def get_num_pgs(self):
+        """
+        Check cluster status for the number of pgs
+        """
+        status = self.raw_cluster_status()
+        self.log(status)
+        return status['pgmap']['num_pgs']
+
+    def create_erasure_code_profile(self, profile_name, profile):
+        """
+        Create an erasure code profile name that can be used as a parameter
+        when creating an erasure coded pool.
+        """
+        with self.lock:
+            args = cmd_erasure_code_profile(profile_name, profile)
+            self.raw_cluster_cmd(*args)
+
+    def create_pool_with_unique_name(self, pg_num=16,
+                                     erasure_code_profile_name=None,
+                                     min_size=None,
+                                     erasure_code_use_overwrites=False):
+        """
+        Create a pool named unique_pool_X where X is unique.
+        """
+        name = ""
+        with self.lock:
+            name = "unique_pool_%s" % (str(self.next_pool_id),)
+            self.next_pool_id += 1
+            self.create_pool(
+                name,
+                pg_num,
+                erasure_code_profile_name=erasure_code_profile_name,
+                min_size=min_size,
+                erasure_code_use_overwrites=erasure_code_use_overwrites)
+        return name
+
+    @contextlib.contextmanager
+    def pool(self, pool_name, pg_num=16, erasure_code_profile_name=None):
+        self.create_pool(pool_name, pg_num, erasure_code_profile_name)
+        yield
+        self.remove_pool(pool_name)
+
+    def create_pool(self, pool_name, pg_num=16,
+                    erasure_code_profile_name=None,
+                    min_size=None,
+                    erasure_code_use_overwrites=False):
+        """
+        Create a pool named from the pool_name parameter.
+        :param pool_name: name of the pool being created.
+        :param pg_num: initial number of pgs.
+        :param erasure_code_profile_name: if set and !None create an
+                                          erasure coded pool using the profile
+        :param erasure_code_use_overwrites: if true, allow overwrites
+        """
+        with self.lock:
+            assert isinstance(pool_name, basestring)
+            assert isinstance(pg_num, int)
+            assert pool_name not in self.pools
+            self.log("creating pool_name %s" % (pool_name,))
+            if erasure_code_profile_name:
+                self.raw_cluster_cmd('osd', 'pool', 'create',
+                                     pool_name, str(pg_num), str(pg_num),
+                                     'erasure', erasure_code_profile_name)
+            else:
+                self.raw_cluster_cmd('osd', 'pool', 'create',
+                                     pool_name, str(pg_num))
+            if min_size is not None:
+                self.raw_cluster_cmd(
+                    'osd', 'pool', 'set', pool_name,
+                    'min_size',
+                    str(min_size))
+            if erasure_code_use_overwrites:
+                self.raw_cluster_cmd(
+                    'osd', 'pool', 'set', pool_name,
+                    'allow_ec_overwrites',
+                    'true')
+            self.raw_cluster_cmd(
+                'osd', 'pool', 'application', 'enable',
+                pool_name, 'rados', '--yes-i-really-mean-it',
+                run.Raw('||'), 'true')
+            self.pools[pool_name] = pg_num
+        time.sleep(1)
+
+    def add_pool_snap(self, pool_name, snap_name):
+        """
+        Add pool snapshot
+        :param pool_name: name of pool to snapshot
+        :param snap_name: name of snapshot to take
+        """
+        self.raw_cluster_cmd('osd', 'pool', 'mksnap',
+                             str(pool_name), str(snap_name))
+
+    def remove_pool_snap(self, pool_name, snap_name):
+        """
+        Remove pool snapshot
+        :param pool_name: name of pool to snapshot
+        :param snap_name: name of snapshot to remove
+        """
+        self.raw_cluster_cmd('osd', 'pool', 'rmsnap',
+                             str(pool_name), str(snap_name))
+
+    def remove_pool(self, pool_name):
+        """
+        Remove the indicated pool
+        :param pool_name: Pool to be removed
+        """
+        with self.lock:
+            assert isinstance(pool_name, basestring)
+            assert pool_name in self.pools
+            self.log("removing pool_name %s" % (pool_name,))
+            del self.pools[pool_name]
+            self.do_rados(self.controller,
+                          ['rmpool', pool_name, pool_name,
+                           "--yes-i-really-really-mean-it"])
+
+    def get_pool(self):
+        """
+        Pick a random pool
+        """
+        with self.lock:
+            return random.choice(self.pools.keys())
+
+    def get_pool_pg_num(self, pool_name):
+        """
+        Return the number of pgs in the pool specified.
+        """
+        with self.lock:
+            assert isinstance(pool_name, basestring)
+            if pool_name in self.pools:
+                return self.pools[pool_name]
+            return 0
+
+    def get_pool_property(self, pool_name, prop):
+        """
+        :param pool_name: pool
+        :param prop: property to be checked.
+        :returns: property as an int value.
+        """
+        with self.lock:
+            assert isinstance(pool_name, basestring)
+            assert isinstance(prop, basestring)
+            output = self.raw_cluster_cmd(
+                'osd',
+                'pool',
+                'get',
+                pool_name,
+                prop)
+            return int(output.split()[1])
+
+    def set_pool_property(self, pool_name, prop, val):
+        """
+        :param pool_name: pool
+        :param prop: property to be set.
+        :param val: value to set.
+
+        This routine retries if set operation fails.
+        """
+        with self.lock:
+            assert isinstance(pool_name, basestring)
+            assert isinstance(prop, basestring)
+            assert isinstance(val, int)
+            tries = 0
+            while True:
+                r = self.raw_cluster_cmd_result(
+                    'osd',
+                    'pool',
+                    'set',
+                    pool_name,
+                    prop,
+                    str(val))
+                if r != 11:  # EAGAIN
+                    break
+                tries += 1
+                if tries > 50:
+                    raise Exception('timed out getting EAGAIN '
+                                    'when setting pool property %s %s = %s' %
+                                    (pool_name, prop, val))
+                self.log('got EAGAIN setting pool property, '
+                         'waiting a few seconds...')
+                time.sleep(2)
+
+    def expand_pool(self, pool_name, by, max_pgs):
+        """
+        Increase the number of pgs in a pool
+        """
+        with self.lock:
+            assert isinstance(pool_name, basestring)
+            assert isinstance(by, int)
+            assert pool_name in self.pools
+            if self.get_num_creating() > 0:
+                return False
+            if (self.pools[pool_name] + by) > max_pgs:
+                return False
+            self.log("increase pool size by %d" % (by,))
+            new_pg_num = self.pools[pool_name] + by
+            self.set_pool_property(pool_name, "pg_num", new_pg_num)
+            self.pools[pool_name] = new_pg_num
+            return True
+
+    def set_pool_pgpnum(self, pool_name, force):
+        """
+        Set pgpnum property of pool_name pool.
+        """
+        with self.lock:
+            assert isinstance(pool_name, basestring)
+            assert pool_name in self.pools
+            if not force and self.get_num_creating() > 0:
+                return False
+            self.set_pool_property(pool_name, 'pgp_num', self.pools[pool_name])
+            return True
+
+    def list_pg_missing(self, pgid):
+        """
+        return list of missing pgs with the id specified
+        """
+        r = None
+        offset = {}
+        while True:
+            out = self.raw_cluster_cmd('--', 'pg', pgid, 'list_missing',
+                                       json.dumps(offset))
+            j = json.loads(out)
+            if r is None:
+                r = j
+            else:
+                r['objects'].extend(j['objects'])
+            if not 'more' in j:
+                break
+            if j['more'] == 0:
+                break
+            offset = j['objects'][-1]['oid']
+        if 'more' in r:
+            del r['more']
+        return r
+
+    def get_pg_stats(self):
+        """
+        Dump the cluster and get pg stats
+        """
+        out = self.raw_cluster_cmd('pg', 'dump', '--format=json')
+        j = json.loads('\n'.join(out.split('\n')[1:]))
+        return j['pg_stats']
+
+    def get_pgids_to_force(self, backfill):
+        """
+        Return the randomized list of PGs that can have their recovery/backfill forced
+        """
+        j = self.get_pg_stats();
+        pgids = []
+        if backfill:
+            wanted = ['degraded', 'backfilling', 'backfill_wait']
+        else:
+            wanted = ['recovering', 'degraded', 'recovery_wait']
+        for pg in j:
+            status = pg['state'].split('+')
+            for t in wanted:
+                if random.random() > 0.5 and not ('forced_backfill' in status or 'forced_recovery' in status) and t in status:
+                    pgids.append(pg['pgid'])
+                    break
+        return pgids
+
+    def get_pgids_to_cancel_force(self, backfill):
+       """
+       Return the randomized list of PGs whose recovery/backfill priority is forced
+       """
+       j = self.get_pg_stats();
+       pgids = []
+       if backfill:
+           wanted = 'forced_backfill'
+       else:
+           wanted = 'forced_recovery'
+       for pg in j:
+           status = pg['state'].split('+')
+           if wanted in status and random.random() > 0.5:
+               pgids.append(pg['pgid'])
+       return pgids
+
+    def compile_pg_status(self):
+        """
+        Return a histogram of pg state values
+        """
+        ret = {}
+        j = self.get_pg_stats()
+        for pg in j:
+            for status in pg['state'].split('+'):
+                if status not in ret:
+                    ret[status] = 0
+                ret[status] += 1
+        return ret
+
+    @wait_for_pg_stats
+    def with_pg_state(self, pool, pgnum, check):
+        pgstr = self.get_pgid(pool, pgnum)
+        stats = self.get_single_pg_stats(pgstr)
+        assert(check(stats['state']))
+
+    @wait_for_pg_stats
+    def with_pg(self, pool, pgnum, check):
+        pgstr = self.get_pgid(pool, pgnum)
+        stats = self.get_single_pg_stats(pgstr)
+        return check(stats)
+
+    def get_last_scrub_stamp(self, pool, pgnum):
+        """
+        Get the timestamp of the last scrub.
+        """
+        stats = self.get_single_pg_stats(self.get_pgid(pool, pgnum))
+        return stats["last_scrub_stamp"]
+
+    def do_pg_scrub(self, pool, pgnum, stype):
+        """
+        Scrub pg and wait for scrubbing to finish
+        """
+        init = self.get_last_scrub_stamp(pool, pgnum)
+        RESEND_TIMEOUT = 120    # Must be a multiple of SLEEP_TIME
+        FATAL_TIMEOUT = RESEND_TIMEOUT * 3
+        SLEEP_TIME = 10
+        timer = 0
+        while init == self.get_last_scrub_stamp(pool, pgnum):
+            assert timer < FATAL_TIMEOUT, "fatal timeout trying to " + stype
+            self.log("waiting for scrub type %s" % (stype,))
+            if (timer % RESEND_TIMEOUT) == 0:
+                self.raw_cluster_cmd('pg', stype, self.get_pgid(pool, pgnum))
+                # The first time in this loop is the actual request
+                if timer != 0 and stype == "repair":
+                    self.log("WARNING: Resubmitted a non-idempotent repair")
+            time.sleep(SLEEP_TIME)
+            timer += SLEEP_TIME
+
+    def wait_snap_trimming_complete(self, pool):
+        """
+        Wait for snap trimming on pool to end
+        """
+        POLL_PERIOD = 10
+        FATAL_TIMEOUT = 600
+        start = time.time()
+        poolnum = self.get_pool_num(pool)
+        poolnumstr = "%s." % (poolnum,)
+        while (True):
+            now = time.time()
+            if (now - start) > FATAL_TIMEOUT:
+                assert (now - start) < FATAL_TIMEOUT, \
+                    'failed to complete snap trimming before timeout'
+            all_stats = self.get_pg_stats()
+            trimming = False
+            for pg in all_stats:
+                if (poolnumstr in pg['pgid']) and ('snaptrim' in pg['state']):
+                    self.log("pg {pg} in trimming, state: {state}".format(
+                        pg=pg['pgid'],
+                        state=pg['state']))
+                    trimming = True
+            if not trimming:
+                break
+            self.log("{pool} still trimming, waiting".format(pool=pool))
+            time.sleep(POLL_PERIOD)
+
+    def get_single_pg_stats(self, pgid):
+        """
+        Return pg for the pgid specified.
+        """
+        all_stats = self.get_pg_stats()
+
+        for pg in all_stats:
+            if pg['pgid'] == pgid:
+                return pg
+
+        return None
+
+    def get_object_pg_with_shard(self, pool, name, osdid):
+        """
+        """
+        pool_dump = self.get_pool_dump(pool)
+        object_map = self.get_object_map(pool, name)
+        if pool_dump["type"] == CephManager.ERASURE_CODED_POOL:
+            shard = object_map['acting'].index(osdid)
+            return "{pgid}s{shard}".format(pgid=object_map['pgid'],
+                                           shard=shard)
+        else:
+            return object_map['pgid']
+
+    def get_object_primary(self, pool, name):
+        """
+        """
+        object_map = self.get_object_map(pool, name)
+        return object_map['acting_primary']
+
+    def get_object_map(self, pool, name):
+        """
+        osd map --format=json converted to a python object
+        :returns: the python object
+        """
+        out = self.raw_cluster_cmd('--format=json', 'osd', 'map', pool, name)
+        return json.loads('\n'.join(out.split('\n')[1:]))
+
+    def get_osd_dump_json(self):
+        """
+        osd dump --format=json converted to a python object
+        :returns: the python object
+        """
+        out = self.raw_cluster_cmd('osd', 'dump', '--format=json')
+        return json.loads('\n'.join(out.split('\n')[1:]))
+
+    def get_osd_dump(self):
+        """
+        Dump osds
+        :returns: all osds
+        """
+        return self.get_osd_dump_json()['osds']
+
+    def get_mgr_dump(self):
+        out = self.raw_cluster_cmd('mgr', 'dump', '--format=json')
+        return json.loads(out)
+
+    def get_stuck_pgs(self, type_, threshold):
+        """
+        :returns: stuck pg information from the cluster
+        """
+        out = self.raw_cluster_cmd('pg', 'dump_stuck', type_, str(threshold),
+                                   '--format=json')
+        return json.loads(out)
+
+    def get_num_unfound_objects(self):
+        """
+        Check cluster status to get the number of unfound objects
+        """
+        status = self.raw_cluster_status()
+        self.log(status)
+        return status['pgmap'].get('unfound_objects', 0)
+
+    def get_num_creating(self):
+        """
+        Find the number of pgs in creating mode.
+        """
+        pgs = self.get_pg_stats()
+        num = 0
+        for pg in pgs:
+            if 'creating' in pg['state']:
+                num += 1
+        return num
+
+    def get_num_active_clean(self):
+        """
+        Find the number of active and clean pgs.
+        """
+        pgs = self.get_pg_stats()
+        num = 0
+        for pg in pgs:
+            if (pg['state'].count('active') and
+                    pg['state'].count('clean') and
+                    not pg['state'].count('stale')):
+                num += 1
+        return num
+
+    def get_num_active_recovered(self):
+        """
+        Find the number of active and recovered pgs.
+        """
+        pgs = self.get_pg_stats()
+        num = 0
+        for pg in pgs:
+            if (pg['state'].count('active') and
+                    not pg['state'].count('recover') and
+                    not pg['state'].count('backfilling') and
+                    not pg['state'].count('stale')):
+                num += 1
+        return num
+
+    def get_is_making_recovery_progress(self):
+        """
+        Return whether there is recovery progress discernable in the
+        raw cluster status
+        """
+        status = self.raw_cluster_status()
+        kps = status['pgmap'].get('recovering_keys_per_sec', 0)
+        bps = status['pgmap'].get('recovering_bytes_per_sec', 0)
+        ops = status['pgmap'].get('recovering_objects_per_sec', 0)
+        return kps > 0 or bps > 0 or ops > 0
+
+    def get_num_active(self):
+        """
+        Find the number of active pgs.
+        """
+        pgs = self.get_pg_stats()
+        num = 0
+        for pg in pgs:
+            if pg['state'].count('active') and not pg['state'].count('stale'):
+                num += 1
+        return num
+
+    def get_num_down(self):
+        """
+        Find the number of pgs that are down.
+        """
+        pgs = self.get_pg_stats()
+        num = 0
+        for pg in pgs:
+            if ((pg['state'].count('down') and not
+                    pg['state'].count('stale')) or
+                (pg['state'].count('incomplete') and not
+                    pg['state'].count('stale'))):
+                num += 1
+        return num
+
+    def get_num_active_down(self):
+        """
+        Find the number of pgs that are either active or down.
+        """
+        pgs = self.get_pg_stats()
+        num = 0
+        for pg in pgs:
+            if ((pg['state'].count('active') and not
+                    pg['state'].count('stale')) or
+                (pg['state'].count('down') and not
+                    pg['state'].count('stale')) or
+                (pg['state'].count('incomplete') and not
+                    pg['state'].count('stale'))):
+                num += 1
+        return num
+
+    def is_clean(self):
+        """
+        True if all pgs are clean
+        """
+        return self.get_num_active_clean() == self.get_num_pgs()
+
+    def is_recovered(self):
+        """
+        True if all pgs have recovered
+        """
+        return self.get_num_active_recovered() == self.get_num_pgs()
+
+    def is_active_or_down(self):
+        """
+        True if all pgs are active or down
+        """
+        return self.get_num_active_down() == self.get_num_pgs()
+
+    def wait_for_clean(self, timeout=None):
+        """
+        Returns true when all pgs are clean.
+        """
+        self.log("waiting for clean")
+        start = time.time()
+        num_active_clean = self.get_num_active_clean()
+        while not self.is_clean():
+            if timeout is not None:
+                if self.get_is_making_recovery_progress():
+                    self.log("making progress, resetting timeout")
+                    start = time.time()
+                else:
+                    self.log("no progress seen, keeping timeout for now")
+                    if time.time() - start >= timeout:
+                        self.log('dumping pgs')
+                        out = self.raw_cluster_cmd('pg', 'dump')
+                        self.log(out)
+                        assert time.time() - start < timeout, \
+                            'failed to become clean before timeout expired'
+            cur_active_clean = self.get_num_active_clean()
+            if cur_active_clean != num_active_clean:
+                start = time.time()
+                num_active_clean = cur_active_clean
+            time.sleep(3)
+        self.log("clean!")
+
+    def are_all_osds_up(self):
+        """
+        Returns true if all osds are up.
+        """
+        x = self.get_osd_dump()
+        return (len(x) == sum([(y['up'] > 0) for y in x]))
+
+    def wait_for_all_osds_up(self, timeout=None):
+        """
+        When this exits, either the timeout has expired, or all
+        osds are up.
+        """
+        self.log("waiting for all up")
+        start = time.time()
+        while not self.are_all_osds_up():
+            if timeout is not None:
+                assert time.time() - start < timeout, \
+                    'timeout expired in wait_for_all_osds_up'
+            time.sleep(3)
+        self.log("all up!")
+
+    def pool_exists(self, pool):
+        if pool in self.list_pools():
+            return True
+        return False
+
+    def wait_for_pool(self, pool, timeout=300):
+        """
+        Wait for a pool to exist
+        """
+        self.log('waiting for pool %s to exist' % pool)
+        start = time.time()
+        while not self.pool_exists(pool):
+            if timeout is not None:
+                assert time.time() - start < timeout, \
+                    'timeout expired in wait_for_pool'
+            time.sleep(3)
+
+    def wait_for_pools(self, pools):
+        for pool in pools:
+            self.wait_for_pool(pool)
+
+    def is_mgr_available(self):
+        x = self.get_mgr_dump()
+        return x.get('available', False)
+
+    def wait_for_mgr_available(self, timeout=None):
+        self.log("waiting for mgr available")
+        start = time.time()
+        while not self.is_mgr_available():
+            if timeout is not None:
+                assert time.time() - start < timeout, \
+                    'timeout expired in wait_for_mgr_available'
+            time.sleep(3)
+        self.log("mgr available!")
+
+    def wait_for_recovery(self, timeout=None):
+        """
+        Check peering. When this exists, we have recovered.
+        """
+        self.log("waiting for recovery to complete")
+        start = time.time()
+        num_active_recovered = self.get_num_active_recovered()
+        while not self.is_recovered():
+            now = time.time()
+            if timeout is not None:
+                if self.get_is_making_recovery_progress():
+                    self.log("making progress, resetting timeout")
+                    start = time.time()
+                else:
+                    self.log("no progress seen, keeping timeout for now")
+                    if now - start >= timeout:
+                       if self.is_recovered():
+                           break
+                        self.log('dumping pgs')
+                        out = self.raw_cluster_cmd('pg', 'dump')
+                        self.log(out)
+                        assert now - start < timeout, \
+                            'failed to recover before timeout expired'
+            cur_active_recovered = self.get_num_active_recovered()
+            if cur_active_recovered != num_active_recovered:
+                start = time.time()
+                num_active_recovered = cur_active_recovered
+            time.sleep(3)
+        self.log("recovered!")
+
+    def wait_for_active(self, timeout=None):
+        """
+        Check peering. When this exists, we are definitely active
+        """
+        self.log("waiting for peering to complete")
+        start = time.time()
+        num_active = self.get_num_active()
+        while not self.is_active():
+            if timeout is not None:
+                if time.time() - start >= timeout:
+                    self.log('dumping pgs')
+                    out = self.raw_cluster_cmd('pg', 'dump')
+                    self.log(out)
+                    assert time.time() - start < timeout, \
+                        'failed to recover before timeout expired'
+            cur_active = self.get_num_active()
+            if cur_active != num_active:
+                start = time.time()
+                num_active = cur_active
+            time.sleep(3)
+        self.log("active!")
+
+    def wait_for_active_or_down(self, timeout=None):
+        """
+        Check peering. When this exists, we are definitely either
+        active or down
+        """
+        self.log("waiting for peering to complete or become blocked")
+        start = time.time()
+        num_active_down = self.get_num_active_down()
+        while not self.is_active_or_down():
+            if timeout is not None:
+                if time.time() - start >= timeout:
+                    self.log('dumping pgs')
+                    out = self.raw_cluster_cmd('pg', 'dump')
+                    self.log(out)
+                    assert time.time() - start < timeout, \
+                        'failed to recover before timeout expired'
+            cur_active_down = self.get_num_active_down()
+            if cur_active_down != num_active_down:
+                start = time.time()
+                num_active_down = cur_active_down
+            time.sleep(3)
+        self.log("active or down!")
+
+    def osd_is_up(self, osd):
+        """
+        Wrapper for osd check
+        """
+        osds = self.get_osd_dump()
+        return osds[osd]['up'] > 0
+
+    def wait_till_osd_is_up(self, osd, timeout=None):
+        """
+        Loop waiting for osd.
+        """
+        self.log('waiting for osd.%d to be up' % osd)
+        start = time.time()
+        while not self.osd_is_up(osd):
+            if timeout is not None:
+                assert time.time() - start < timeout, \
+                    'osd.%d failed to come up before timeout expired' % osd
+            time.sleep(3)
+        self.log('osd.%d is up' % osd)
+
+    def is_active(self):
+        """
+        Wrapper to check if all pgs are active
+        """
+        return self.get_num_active() == self.get_num_pgs()
+
+    def wait_till_active(self, timeout=None):
+        """
+        Wait until all pgs are active.
+        """
+        self.log("waiting till active")
+        start = time.time()
+        while not self.is_active():
+            if timeout is not None:
+                if time.time() - start >= timeout:
+                    self.log('dumping pgs')
+                    out = self.raw_cluster_cmd('pg', 'dump')
+                    self.log(out)
+                    assert time.time() - start < timeout, \
+                        'failed to become active before timeout expired'
+            time.sleep(3)
+        self.log("active!")
+
+    def wait_till_pg_convergence(self, timeout=None):
+        start = time.time()
+        old_stats = None
+        active_osds = [osd['osd'] for osd in self.get_osd_dump()
+                       if osd['in'] and osd['up']]
+        while True:
+            # strictly speaking, no need to wait for mon. but due to the
+            # "ms inject socket failures" setting, the osdmap could be delayed,
+            # so mgr is likely to ignore the pg-stat messages with pgs serving
+            # newly created pools which is not yet known by mgr. so, to make sure
+            # the mgr is updated with the latest pg-stats, waiting for mon/mgr is
+            # necessary.
+            self.flush_pg_stats(active_osds)
+            new_stats = dict((stat['pgid'], stat['state'])
+                             for stat in self.get_pg_stats())
+            if old_stats == new_stats:
+                return old_stats
+            if timeout is not None:
+                assert time.time() - start < timeout, \
+                    'failed to reach convergence before %d secs' % timeout
+            old_stats = new_stats
+            # longer than mgr_stats_period
+            time.sleep(5 + 1)
+
+    def mark_out_osd(self, osd):
+        """
+        Wrapper to mark osd out.
+        """
+        self.raw_cluster_cmd('osd', 'out', str(osd))
+
+    def kill_osd(self, osd):
+        """
+        Kill osds by either power cycling (if indicated by the config)
+        or by stopping.
+        """
+        if self.config.get('powercycle'):
+            remote = self.find_remote('osd', osd)
+            self.log('kill_osd on osd.{o} '
+                     'doing powercycle of {s}'.format(o=osd, s=remote.name))
+            self._assert_ipmi(remote)
+            remote.console.power_off()
+        elif self.config.get('bdev_inject_crash') and self.config.get('bdev_inject_crash_probability'):
+            if random.uniform(0, 1) < self.config.get('bdev_inject_crash_probability', .5):
+                self.raw_cluster_cmd(
+                    '--', 'tell', 'osd.%d' % osd,
+                    'injectargs',
+                    '--bdev-inject-crash %d' % self.config.get('bdev_inject_crash'),
+                )
+                try:
+                    self.ctx.daemons.get_daemon('osd', osd, self.cluster).wait()
+                except:
+                    pass
+                else:
+                    raise RuntimeError('osd.%s did not fail' % osd)
+            else:
+                self.ctx.daemons.get_daemon('osd', osd, self.cluster).stop()
+        else:
+            self.ctx.daemons.get_daemon('osd', osd, self.cluster).stop()
+
+    @staticmethod
+    def _assert_ipmi(remote):
+        assert remote.console.has_ipmi_credentials, (
+            "powercycling requested but RemoteConsole is not "
+            "initialized.  Check ipmi config.")
+
+    def blackhole_kill_osd(self, osd):
+        """
+        Stop osd if nothing else works.
+        """
+        self.raw_cluster_cmd('--', 'tell', 'osd.%d' % osd,
+                             'injectargs',
+                             '--objectstore-blackhole')
+        time.sleep(2)
+        self.ctx.daemons.get_daemon('osd', osd, self.cluster).stop()
+
+    def revive_osd(self, osd, timeout=360, skip_admin_check=False):
+        """
+        Revive osds by either power cycling (if indicated by the config)
+        or by restarting.
+        """
+        if self.config.get('powercycle'):
+            remote = self.find_remote('osd', osd)
+            self.log('kill_osd on osd.{o} doing powercycle of {s}'.
+                     format(o=osd, s=remote.name))
+            self._assert_ipmi(remote)
+            remote.console.power_on()
+            if not remote.console.check_status(300):
+                raise Exception('Failed to revive osd.{o} via ipmi'.
+                                format(o=osd))
+            teuthology.reconnect(self.ctx, 60, [remote])
+            mount_osd_data(self.ctx, remote, self.cluster, str(osd))
+            self.make_admin_daemon_dir(remote)
+            self.ctx.daemons.get_daemon('osd', osd, self.cluster).reset()
+        self.ctx.daemons.get_daemon('osd', osd, self.cluster).restart()
+
+        if not skip_admin_check:
+            # wait for dump_ops_in_flight; this command doesn't appear
+            # until after the signal handler is installed and it is safe
+            # to stop the osd again without making valgrind leak checks
+            # unhappy.  see #5924.
+            self.wait_run_admin_socket('osd', osd,
+                                       args=['dump_ops_in_flight'],
+                                       timeout=timeout, stdout=DEVNULL)
+
+    def mark_down_osd(self, osd):
+        """
+        Cluster command wrapper
+        """
+        self.raw_cluster_cmd('osd', 'down', str(osd))
+
+    def mark_in_osd(self, osd):
+        """
+        Cluster command wrapper
+        """
+        self.raw_cluster_cmd('osd', 'in', str(osd))
+
+    def signal_osd(self, osd, sig, silent=False):
+        """
+        Wrapper to local get_daemon call which sends the given
+        signal to the given osd.
+        """
+        self.ctx.daemons.get_daemon('osd', osd,
+                                    self.cluster).signal(sig, silent=silent)
+
+    ## monitors
+    def signal_mon(self, mon, sig, silent=False):
+        """
+        Wrapper to local get_deamon call
+        """
+        self.ctx.daemons.get_daemon('mon', mon,
+                                    self.cluster).signal(sig, silent=silent)
+
+    def kill_mon(self, mon):
+        """
+        Kill the monitor by either power cycling (if the config says so),
+        or by doing a stop.
+        """
+        if self.config.get('powercycle'):
+            remote = self.find_remote('mon', mon)
+            self.log('kill_mon on mon.{m} doing powercycle of {s}'.
+                     format(m=mon, s=remote.name))
+            self._assert_ipmi(remote)
+            remote.console.power_off()
+        else:
+            self.ctx.daemons.get_daemon('mon', mon, self.cluster).stop()
+
+    def revive_mon(self, mon):
+        """
+        Restart by either power cycling (if the config says so),
+        or by doing a normal restart.
+        """
+        if self.config.get('powercycle'):
+            remote = self.find_remote('mon', mon)
+            self.log('revive_mon on mon.{m} doing powercycle of {s}'.
+                     format(m=mon, s=remote.name))
+            self._assert_ipmi(remote)
+            remote.console.power_on()
+            self.make_admin_daemon_dir(remote)
+        self.ctx.daemons.get_daemon('mon', mon, self.cluster).restart()
+
+    def revive_mgr(self, mgr):
+        """
+        Restart by either power cycling (if the config says so),
+        or by doing a normal restart.
+        """
+        if self.config.get('powercycle'):
+            remote = self.find_remote('mgr', mgr)
+            self.log('revive_mgr on mgr.{m} doing powercycle of {s}'.
+                     format(m=mgr, s=remote.name))
+            self._assert_ipmi(remote)
+            remote.console.power_on()
+            self.make_admin_daemon_dir(remote)
+        self.ctx.daemons.get_daemon('mgr', mgr, self.cluster).restart()
+
+    def get_mon_status(self, mon):
+        """
+        Extract all the monitor status information from the cluster
+        """
+        addr = self.ctx.ceph[self.cluster].conf['mon.%s' % mon]['mon addr']
+        out = self.raw_cluster_cmd('-m', addr, 'mon_status')
+        return json.loads(out)
+
+    def get_mon_quorum(self):
+        """
+        Extract monitor quorum information from the cluster
+        """
+        out = self.raw_cluster_cmd('quorum_status')
+        j = json.loads(out)
+        self.log('quorum_status is %s' % out)
+        return j['quorum']
+
+    def wait_for_mon_quorum_size(self, size, timeout=300):
+        """
+        Loop until quorum size is reached.
+        """
+        self.log('waiting for quorum size %d' % size)
+        start = time.time()
+        while not len(self.get_mon_quorum()) == size:
+            if timeout is not None:
+                assert time.time() - start < timeout, \
+                    ('failed to reach quorum size %d '
+                     'before timeout expired' % size)
+            time.sleep(3)
+        self.log("quorum is size %d" % size)
+
+    def get_mon_health(self, debug=False):
+        """
+        Extract all the monitor health information.
+        """
+        out = self.raw_cluster_cmd('health', '--format=json')
+        if debug:
+            self.log('health:\n{h}'.format(h=out))
+        return json.loads(out)
+
+    def get_mds_status(self, mds):
+        """
+        Run cluster commands for the mds in order to get mds information
+        """
+        out = self.raw_cluster_cmd('mds', 'dump', '--format=json')
+        j = json.loads(' '.join(out.splitlines()[1:]))
+        # collate; for dup ids, larger gid wins.
+        for info in j['info'].itervalues():
+            if info['name'] == mds:
+                return info
+        return None
+
+    def get_filepath(self):
+        """
+        Return path to osd data with {id} needing to be replaced
+        """
+        return '/var/lib/ceph/osd/' + self.cluster + '-{id}'
+
+    def make_admin_daemon_dir(self, remote):
+        """
+        Create /var/run/ceph directory on remote site.
+
+        :param ctx: Context
+        :param remote: Remote site
+        """
+        remote.run(args=['sudo',
+                         'install', '-d', '-m0777', '--', '/var/run/ceph', ], )
+
+
+def utility_task(name):
+    """
+    Generate ceph_manager subtask corresponding to ceph_manager
+    method name
+    """
+    def task(ctx, config):
+        if config is None:
+            config = {}
+        args = config.get('args', [])
+        kwargs = config.get('kwargs', {})
+        cluster = config.get('cluster', 'ceph')
+        fn = getattr(ctx.managers[cluster], name)
+        fn(*args, **kwargs)
+    return task
+
+revive_osd = utility_task("revive_osd")
+revive_mon = utility_task("revive_mon")
+kill_osd = utility_task("kill_osd")
+kill_mon = utility_task("kill_mon")
+create_pool = utility_task("create_pool")
+remove_pool = utility_task("remove_pool")
+wait_for_clean = utility_task("wait_for_clean")
+flush_all_pg_stats = utility_task("flush_all_pg_stats")
+set_pool_property = utility_task("set_pool_property")
+do_pg_scrub = utility_task("do_pg_scrub")
+wait_for_pool = utility_task("wait_for_pool")
+wait_for_pools = utility_task("wait_for_pools")