apex/undercloud/undercloud.py

   1 ##############################################################################
   2 # Copyright (c) 2017 Tim Rozet (trozet@redhat.com) and others.
   3 #
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9
  10 import libvirt
  11 import logging
  12 import os
  13 import platform
  14 import shutil
  15 import subprocess
  16 import time
  17
  18 from apex.virtual import utils as virt_utils
  19 from apex.virtual import configure_vm as vm_lib
  20 from apex.common import constants
  21 from apex.common import utils
  22
  23
  24 class ApexUndercloudException(Exception):
  25     pass
  26
  27
  28 class Undercloud:
  29     """
  30     This class represents an Apex Undercloud VM
  31     """
  32     def __init__(self, image_path, template_path,
  33                  root_pw=None, external_network=False,
  34                  image_name='undercloud.qcow2',
  35                  os_version=constants.DEFAULT_OS_VERSION):
  36         self.ip = None
  37         self.os_version = os_version
  38         self.root_pw = root_pw
  39         self.external_net = external_network
  40         self.volume = os.path.join(constants.LIBVIRT_VOLUME_PATH,
  41                                    'undercloud.qcow2')
  42         self.image_path = image_path
  43         self.image_name = image_name
  44         self.template_path = template_path
  45         self.vm = None
  46         if Undercloud._get_vm():
  47             logging.error("Undercloud VM already exists.  Please clean "
  48                           "before creating")
  49             raise ApexUndercloudException("Undercloud VM already exists!")
  50         self.create()
  51
  52     @staticmethod
  53     def _get_vm():
  54         conn = libvirt.open('qemu:///system')
  55         try:
  56             vm = conn.lookupByName('undercloud')
  57             return vm
  58         except libvirt.libvirtError:
  59             logging.debug("No undercloud VM exists")
  60
  61     def create(self):
  62         networks = ['admin']
  63         if self.external_net:
  64             networks.append('external')
  65         console = 'ttyAMA0' if platform.machine() == 'aarch64' else 'ttyS0'
  66         root = 'vda' if platform.machine() == 'aarch64' else 'sda'
  67
  68         self.vm = vm_lib.create_vm(name='undercloud',
  69                                    image=self.volume,
  70                                    baremetal_interfaces=networks,
  71                                    direct_boot='overcloud-full',
  72                                    kernel_args=['console={}'.format(console),
  73                                                 'root=/dev/{}'.format(root)],
  74                                    default_network=True,
  75                                    template_dir=self.template_path)
  76         self.setup_volumes()
  77         self.inject_auth()
  78
  79     @staticmethod
  80     def _get_ip(vm):
  81         ip_out = vm.interfaceAddresses(
  82             libvirt.VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE, 0)
  83         if ip_out:
  84             for (name, val) in ip_out.items():
  85                 for ipaddr in val['addrs']:
  86                     if ipaddr['type'] == libvirt.VIR_IP_ADDR_TYPE_IPV4:
  87                         return ipaddr['addr']
  88
  89     def _set_ip(self):
  90         ip = self._get_ip(self.vm)
  91         if ip:
  92             self.ip = ip
  93             return True
  94
  95     @staticmethod
  96     def get_ip():
  97         vm = Undercloud._get_vm()
  98         return Undercloud._get_ip(vm)
  99
 100     def start(self):
 101         """
 102         Start Undercloud VM
 103         :return: None
 104         """
 105         if self.vm.isActive():
 106             logging.info("Undercloud already started")
 107         else:
 108             logging.info("Starting undercloud")
 109             self.vm.create()
 110             # give 10 seconds to come up
 111             time.sleep(10)
 112         # set IP
 113         for x in range(5):
 114             if self._set_ip():
 115                 logging.info("Undercloud started.  IP Address: {}".format(
 116                     self.ip))
 117                 break
 118             logging.debug("Did not find undercloud IP in {} "
 119                           "attempts...".format(x))
 120             time.sleep(10)
 121         else:
 122             logging.error("Cannot find IP for Undercloud")
 123             raise ApexUndercloudException(
 124                 "Unable to find IP for undercloud.  Check if VM booted "
 125                 "correctly")
 126
 127     def detect_nat(self, net_settings):
 128         if self.external_net:
 129             net = net_settings['networks'][constants.EXTERNAL_NETWORK][0]
 130         else:
 131             net = net_settings['networks'][constants.ADMIN_NETWORK]
 132         if net['gateway'] == net['installer_vm']['ip']:
 133             return True
 134         else:
 135             return False
 136
 137     def configure(self, net_settings, deploy_settings,
 138                   playbook, apex_temp_dir, virtual_oc=False):
 139         """
 140         Configures undercloud VM
 141         :param net_settings: Network settings for deployment
 142         :param deploy_settings: Deployment settings for deployment
 143         :param playbook: playbook to use to configure undercloud
 144         :param apex_temp_dir: temporary apex directory to hold configs/logs
 145         :param virtual_oc: Boolean to determine if overcloud is virt
 146         :return: None
 147         """
 148
 149         logging.info("Configuring Undercloud...")
 150         # run ansible
 151         ansible_vars = Undercloud.generate_config(net_settings,
 152                                                   deploy_settings)
 153         ansible_vars['apex_temp_dir'] = apex_temp_dir
 154
 155         ansible_vars['nat'] = self.detect_nat(net_settings)
 156         try:
 157             utils.run_ansible(ansible_vars, playbook, host=self.ip,
 158                               user='stack')
 159         except subprocess.CalledProcessError:
 160             logging.error(
 161                 "Failed to install undercloud..."
 162                 "please check log: {}".format(os.path.join(
 163                     apex_temp_dir, 'apex-undercloud-install.log')))
 164             raise ApexUndercloudException('Failed to install undercloud')
 165         logging.info("Undercloud installed!")
 166
 167     def setup_volumes(self):
 168         for img_file in ('overcloud-full.vmlinuz', 'overcloud-full.initrd',
 169                          self.image_name):
 170             src_img = os.path.join(self.image_path, img_file)
 171             if img_file == self.image_name:
 172                 dest_img = os.path.join(constants.LIBVIRT_VOLUME_PATH,
 173                                         'undercloud.qcow2')
 174             else:
 175                 dest_img = os.path.join(constants.LIBVIRT_VOLUME_PATH,
 176                                         img_file)
 177             if not os.path.isfile(src_img):
 178                 raise ApexUndercloudException(
 179                     "Required source file does not exist:{}".format(src_img))
 180             if os.path.exists(dest_img):
 181                 os.remove(dest_img)
 182             shutil.copyfile(src_img, dest_img)
 183             shutil.chown(dest_img, user='qemu', group='qemu')
 184             os.chmod(dest_img, 0o0744)
 185         # TODO(trozet):check if resize needed right now size is 50gb
 186         # there is a lib called vminspect which has some dependencies and is
 187         # not yet available in pip.  Consider switching to this lib later.
 188
 189     def inject_auth(self):
 190         virt_ops = list()
 191         # virt-customize keys/pws
 192         if self.root_pw:
 193             pw_op = "password:{}".format(self.root_pw)
 194             virt_ops.append({constants.VIRT_PW: pw_op})
 195         # ssh key setup
 196         virt_ops.append({constants.VIRT_RUN_CMD:
 197                         'mkdir -p /root/.ssh'})
 198         virt_ops.append({constants.VIRT_UPLOAD:
 199                          '/root/.ssh/id_rsa.pub:/root/.ssh/authorized_keys'})
 200         run_cmds = [
 201             'chmod 600 /root/.ssh/authorized_keys',
 202             'restorecon -R -v /root/.ssh',
 203             'cp /root/.ssh/authorized_keys /home/stack/.ssh/',
 204             'chown stack:stack /home/stack/.ssh/authorized_keys',
 205             'chmod 600 /home/stack/.ssh/authorized_keys'
 206         ]
 207         for cmd in run_cmds:
 208             virt_ops.append({constants.VIRT_RUN_CMD: cmd})
 209         virt_utils.virt_customize(virt_ops, self.volume)
 210
 211     @staticmethod
 212     def generate_config(ns, ds):
 213         """
 214         Generates a dictionary of settings for configuring undercloud
 215         :param ns: network settings to derive undercloud settings
 216         :param ds: deploy settings to derive undercloud settings
 217         :return: dictionary of settings
 218         """
 219
 220         ns_admin = ns['networks']['admin']
 221         intro_range = ns['apex']['networks']['admin']['introspection_range']
 222         config = dict()
 223         # Check if this is an ARM deployment
 224         config['aarch64'] = platform.machine() == 'aarch64'
 225         # Configuration for undercloud.conf
 226         config['undercloud_config'] = [
 227             "enable_ui false",
 228             "undercloud_update_packages false",
 229             "undercloud_debug false",
 230             "inspection_extras false",
 231             "ipxe_enabled {}".format(
 232                 str(ds['global_params'].get('ipxe', True) and
 233                     not config['aarch64'])),
 234             "undercloud_hostname undercloud.{}".format(ns['dns-domain']),
 235             "local_ip {}/{}".format(str(ns_admin['installer_vm']['ip']),
 236                                     str(ns_admin['cidr']).split('/')[1]),
 237             "generate_service_certificate false",
 238             "undercloud_ntp_servers {}".format(str(ns['ntp'][0]))
 239         ]
 240
 241         config['undercloud_network_config'] = [
 242             "gateway {}".format(str(ns_admin['installer_vm']['ip'])),
 243             "cidr {}".format(str(ns_admin['cidr'])),
 244             "dhcp_start {}".format(str(ns_admin['dhcp_range'][0])),
 245             "dhcp_end {}".format(str(ns_admin['dhcp_range'][1])),
 246             "inspection_iprange {}".format(','.join(intro_range)),
 247         ]
 248
 249         config['ironic_config'] = [
 250             "disk_utils iscsi_verify_attempts 30",
 251             "disk_partitioner check_device_max_retries 40"
 252         ]
 253
 254         config['nova_config'] = [
 255             "dns_domain {}".format(ns['dns-domain']),
 256             "dhcp_domain {}".format(ns['dns-domain'])
 257         ]
 258
 259         config['neutron_config'] = [
 260             "dns_domain {}".format(ns['dns-domain']),
 261         ]
 262         # FIXME(trozet): possible bug here with not using external network
 263         ns_external = ns['networks']['external'][0]
 264         config['external_network'] = {
 265             "vlan": ns_external['installer_vm']['vlan'],
 266             "ip": ns_external['installer_vm']['ip'],
 267             "prefix": str(ns_external['cidr']).split('/')[1],
 268             "enabled": ns_external['enabled']
 269         }
 270         # We will NAT external network if it is enabled. If external network
 271         # is IPv6, we will NAT admin network in case we need IPv4 connectivity
 272         # for things like DNS server.
 273         if 'external' in ns.enabled_network_list and \
 274                 ns_external['cidr'].version == 4:
 275             nat_cidr = ns_external['cidr']
 276         else:
 277             nat_cidr = ns['networks']['admin']['cidr']
 278         config['nat_cidr'] = str(nat_cidr)
 279         if nat_cidr.version == 6:
 280             config['nat_network_ipv6'] = True
 281         else:
 282             config['nat_network_ipv6'] = False
 283         config['http_proxy'] = ns.get('http_proxy', '')
 284         config['https_proxy'] = ns.get('https_proxy', '')
 285
 286         return config
 287
 288     def _update_delorean_repo(self):
 289         if utils.internet_connectivity():
 290             logging.info('Updating delorean repo on Undercloud')
 291             delorean_repo = (
 292                 "https://trunk.rdoproject.org/centos7-{}"
 293                 "/current-tripleo/delorean.repo".format(self.os_version))
 294             cmd = ("curl -L -f -o "
 295                    "/etc/yum.repos.d/deloran.repo {}".format(delorean_repo))
 296             try:
 297                 virt_utils.virt_customize([{constants.VIRT_RUN_CMD: cmd}],
 298                                           self.volume)
 299             except Exception:
 300                 logging.warning("Failed to download and update delorean repo "
 301                                 "for Undercloud")