--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2013 Inktank, Inc
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+#include "include/memory.h"
+#include <errno.h>
+#include <map>
+#include <list>
+#include <string>
+#include <sstream>
+
+#include "acconfig.h"
+
+#ifdef HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+
+#ifdef HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#include "messages/MMonHealth.h"
+#include "include/assert.h"
+#include "common/Formatter.h"
+#include "common/errno.h"
+
+#include "mon/Monitor.h"
+#include "mon/DataHealthService.h"
+
+#define dout_subsys ceph_subsys_mon
+#undef dout_prefix
+#define dout_prefix _prefix(_dout, mon, this)
+static ostream& _prefix(std::ostream *_dout, const Monitor *mon,
+ const DataHealthService *svc) {
+ assert(mon != NULL);
+ assert(svc != NULL);
+ return *_dout << "mon." << mon->name << "@" << mon->rank
+ << "(" << mon->get_state_name() << ")." << svc->get_name()
+ << "(" << svc->get_epoch() << ") ";
+}
+
+void DataHealthService::start_epoch()
+{
+ dout(10) << __func__ << " epoch " << get_epoch() << dendl;
+ // we are not bound by election epochs, but we should clear the stats
+ // everytime an election is triggerd. As far as we know, a monitor might
+ // have been running out of disk space and someone fixed it. We don't want
+ // to hold the cluster back, even confusing the user, due to some possibly
+ // outdated stats.
+ stats.clear();
+ last_warned_percent = 0;
+}
+
+void DataHealthService::get_health(
+ list<pair<health_status_t,string> >& summary,
+ list<pair<health_status_t,string> > *detail)
+{
+ dout(10) << __func__ << dendl;
+ for (map<entity_inst_t,DataStats>::iterator it = stats.begin();
+ it != stats.end(); ++it) {
+ string mon_name = mon->monmap->get_name(it->first.addr);
+ DataStats& stats = it->second;
+
+ health_status_t health_status = HEALTH_OK;
+ string health_detail;
+ if (stats.fs_stats.avail_percent <= g_conf->mon_data_avail_crit) {
+ health_status = HEALTH_ERR;
+ health_detail = "low disk space, shutdown imminent";
+ } else if (stats.fs_stats.avail_percent <= g_conf->mon_data_avail_warn) {
+ health_status = HEALTH_WARN;
+ health_detail = "low disk space";
+ }
+
+ if (stats.store_stats.bytes_total >= g_conf->mon_data_size_warn) {
+ if (health_status > HEALTH_WARN)
+ health_status = HEALTH_WARN;
+ if (!health_detail.empty())
+ health_detail.append("; ");
+ stringstream ss;
+ ss << "store is getting too big! "
+ << prettybyte_t(stats.store_stats.bytes_total)
+ << " >= " << prettybyte_t(g_conf->mon_data_size_warn);
+ health_detail.append(ss.str());
+ }
+
+ if (health_status != HEALTH_OK) {
+ stringstream ss;
+ ss << "mon." << mon_name << " " << health_detail;
+ summary.push_back(make_pair(health_status, ss.str()));
+ ss << " -- " << stats.fs_stats.avail_percent << "% avail";
+ if (detail)
+ detail->push_back(make_pair(health_status, ss.str()));
+ }
+ }
+}
+
+int DataHealthService::update_store_stats(DataStats &ours)
+{
+ map<string,uint64_t> extra;
+ uint64_t store_size = mon->store->get_estimated_size(extra);
+ assert(store_size > 0);
+
+ ours.store_stats.bytes_total = store_size;
+ ours.store_stats.bytes_sst = extra["sst"];
+ ours.store_stats.bytes_log = extra["log"];
+ ours.store_stats.bytes_misc = extra["misc"];
+ ours.last_update = ceph_clock_now();
+
+ return 0;
+}
+
+
+int DataHealthService::update_stats()
+{
+ entity_inst_t our_inst = mon->messenger->get_myinst();
+ DataStats& ours = stats[our_inst];
+
+ int err = get_fs_stats(ours.fs_stats, g_conf->mon_data.c_str());
+ if (err < 0) {
+ derr << __func__ << " get_fs_stats error: " << cpp_strerror(err) << dendl;
+ return err;
+ }
+ dout(0) << __func__ << " avail " << ours.fs_stats.avail_percent << "%"
+ << " total " << prettybyte_t(ours.fs_stats.byte_total)
+ << ", used " << prettybyte_t(ours.fs_stats.byte_used)
+ << ", avail " << prettybyte_t(ours.fs_stats.byte_avail) << dendl;
+ ours.last_update = ceph_clock_now();
+
+ return update_store_stats(ours);
+}
+
+void DataHealthService::share_stats()
+{
+ dout(10) << __func__ << dendl;
+ if (!in_quorum())
+ return;
+
+ assert(!stats.empty());
+ entity_inst_t our_inst = mon->messenger->get_myinst();
+ assert(stats.count(our_inst) > 0);
+ DataStats &ours = stats[our_inst];
+ const set<int>& quorum = mon->get_quorum();
+ for (set<int>::const_iterator it = quorum.begin();
+ it != quorum.end(); ++it) {
+ if (mon->monmap->get_name(*it) == mon->name)
+ continue;
+ entity_inst_t inst = mon->monmap->get_inst(*it);
+ MMonHealth *m = new MMonHealth(HealthService::SERVICE_HEALTH_DATA,
+ MMonHealth::OP_TELL);
+ m->data_stats = ours;
+ dout(20) << __func__ << " send " << *m << " to " << inst << dendl;
+ mon->messenger->send_message(m, inst);
+ }
+}
+
+void DataHealthService::service_tick()
+{
+ dout(10) << __func__ << dendl;
+
+ int err = update_stats();
+ if (err < 0) {
+ derr << "something went wrong obtaining our disk stats: "
+ << cpp_strerror(err) << dendl;
+ force_shutdown();
+ return;
+ }
+ if (in_quorum())
+ share_stats();
+
+ DataStats &ours = stats[mon->messenger->get_myinst()];
+
+ if (ours.fs_stats.avail_percent <= g_conf->mon_data_avail_crit) {
+ derr << "reached critical levels of available space on local monitor storage"
+ << " -- shutdown!" << dendl;
+ force_shutdown();
+ return;
+ }
+
+ // we must backoff these warnings, and track how much data is being
+ // consumed in-between reports to assess if it's worth to log this info,
+ // otherwise we may very well contribute to the consumption of the
+ // already low available disk space.
+ if (ours.fs_stats.avail_percent <= g_conf->mon_data_avail_warn) {
+ if (ours.fs_stats.avail_percent != last_warned_percent)
+ mon->clog->warn()
+ << "reached concerning levels of available space on local monitor storage"
+ << " (" << ours.fs_stats.avail_percent << "% free)";
+ last_warned_percent = ours.fs_stats.avail_percent;
+ } else {
+ last_warned_percent = 0;
+ }
+}
+
+void DataHealthService::handle_tell(MonOpRequestRef op)
+{
+ op->mark_event("datahealth:handle_tell");
+ MMonHealth *m = static_cast<MMonHealth*>(op->get_req());
+ dout(10) << __func__ << " " << *m << dendl;
+ assert(m->get_service_op() == MMonHealth::OP_TELL);
+
+ stats[m->get_source_inst()] = m->data_stats;
+}
+
+bool DataHealthService::service_dispatch_op(MonOpRequestRef op)
+{
+ op->mark_event("datahealth:service_dispatch_op");
+ MMonHealth *m = static_cast<MMonHealth*>(op->get_req());
+ dout(10) << __func__ << " " << *m << dendl;
+ assert(m->get_service_type() == get_type());
+ if (!in_quorum()) {
+ dout(1) << __func__ << " not in quorum -- drop message" << dendl;
+ return false;
+ }
+
+ switch (m->service_op) {
+ case MMonHealth::OP_TELL:
+ // someone is telling us their stats
+ handle_tell(op);
+ break;
+ default:
+ dout(0) << __func__ << " unknown op " << m->service_op << dendl;
+ assert(0 == "Unknown service op");
+ break;
+ }
+ return true;
+}
Code Review / stor4nfv.git / blobdiff