--- /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 <stdlib.h>
+#include <limits.h>
+#include <sstream>
+#include <boost/regex.hpp>
+
+#include "include/assert.h"
+#include "include/stringify.h"
+
+#include "mon/Monitor.h"
+#include "mon/HealthService.h"
+#include "mon/HealthMonitor.h"
+#include "mon/DataHealthService.h"
+
+#include "messages/MMonHealth.h"
+#include "messages/MMonHealthChecks.h"
+
+#include "common/Formatter.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 HealthMonitor *hmon) {
+ return *_dout << "mon." << mon->name << "@" << mon->rank
+ << "(" << mon->get_state_name() << ").health ";
+}
+
+HealthMonitor::HealthMonitor(Monitor *m, Paxos *p, const string& service_name)
+ : PaxosService(m, p, service_name) {
+}
+
+void HealthMonitor::init()
+{
+ dout(10) << __func__ << dendl;
+}
+
+void HealthMonitor::create_initial()
+{
+ dout(10) << __func__ << dendl;
+}
+
+void HealthMonitor::update_from_paxos(bool *need_bootstrap)
+{
+ version = get_last_committed();
+ dout(10) << __func__ << dendl;
+ load_health();
+
+ bufferlist qbl;
+ mon->store->get(service_name, "quorum", qbl);
+ if (qbl.length()) {
+ auto p = qbl.begin();
+ ::decode(quorum_checks, p);
+ } else {
+ quorum_checks.clear();
+ }
+
+ bufferlist lbl;
+ mon->store->get(service_name, "leader", lbl);
+ if (lbl.length()) {
+ auto p = lbl.begin();
+ ::decode(leader_checks, p);
+ } else {
+ leader_checks.clear();
+ }
+
+ dout(20) << "dump:";
+ JSONFormatter jf(true);
+ jf.open_object_section("health");
+ jf.open_object_section("quorum_health");
+ for (auto& p : quorum_checks) {
+ string s = string("mon.") + stringify(p.first);
+ jf.dump_object(s.c_str(), p.second);
+ }
+ jf.close_section();
+ jf.dump_object("leader_health", leader_checks);
+ jf.close_section();
+ jf.flush(*_dout);
+ *_dout << dendl;
+}
+
+void HealthMonitor::create_pending()
+{
+ dout(10) << " " << version << dendl;
+}
+
+void HealthMonitor::encode_pending(MonitorDBStore::TransactionRef t)
+{
+ ++version;
+ dout(10) << " " << version << dendl;
+ put_last_committed(t, version);
+
+ bufferlist qbl;
+ ::encode(quorum_checks, qbl);
+ t->put(service_name, "quorum", qbl);
+ bufferlist lbl;
+ ::encode(leader_checks, lbl);
+ t->put(service_name, "leader", lbl);
+
+ health_check_map_t pending_health;
+
+ // combine per-mon details carefully...
+ map<string,set<string>> names; // code -> <mon names>
+ for (auto p : quorum_checks) {
+ for (auto q : p.second.checks) {
+ names[q.first].insert(mon->monmap->get_name(p.first));
+ }
+ pending_health.merge(p.second);
+ }
+ for (auto &p : pending_health.checks) {
+ p.second.summary = boost::regex_replace(
+ p.second.summary,
+ boost::regex("%hasorhave%"),
+ names[p.first].size() > 1 ? "have" : "has");
+ p.second.summary = boost::regex_replace(
+ p.second.summary,
+ boost::regex("%names%"), stringify(names[p.first]));
+ p.second.summary = boost::regex_replace(
+ p.second.summary,
+ boost::regex("%plurals%"),
+ names[p.first].size() > 1 ? "s" : "");
+ p.second.summary = boost::regex_replace(
+ p.second.summary,
+ boost::regex("%isorare%"),
+ names[p.first].size() > 1 ? "are" : "is");
+ }
+
+ pending_health.merge(leader_checks);
+ encode_health(pending_health, t);
+}
+
+version_t HealthMonitor::get_trim_to()
+{
+ // we don't actually need *any* old states, but keep a few.
+ if (version > 5) {
+ return version - 5;
+ }
+ return 0;
+}
+
+bool HealthMonitor::preprocess_query(MonOpRequestRef op)
+{
+ return false;
+}
+
+bool HealthMonitor::prepare_update(MonOpRequestRef op)
+{
+ Message *m = op->get_req();
+ dout(7) << "prepare_update " << *m
+ << " from " << m->get_orig_source_inst() << dendl;
+ switch (m->get_type()) {
+ case MSG_MON_HEALTH:
+ {
+ MMonHealth *hm = static_cast<MMonHealth*>(op->get_req());
+ int service_type = hm->get_service_type();
+ if (services.count(service_type) == 0) {
+ dout(1) << __func__ << " service type " << service_type
+ << " not registered -- drop message!" << dendl;
+ return false;
+ }
+ return services[service_type]->service_dispatch(op);
+ }
+ case MSG_MON_HEALTH_CHECKS:
+ return prepare_health_checks(op);
+ default:
+ return false;
+ }
+}
+
+bool HealthMonitor::prepare_health_checks(MonOpRequestRef op)
+{
+ MMonHealthChecks *m = static_cast<MMonHealthChecks*>(op->get_req());
+ // no need to check if it's changed, the peon has done so
+ quorum_checks[m->get_source().num()] = std::move(m->health_checks);
+ return true;
+}
+
+void HealthMonitor::tick()
+{
+ if (!is_active()) {
+ return;
+ }
+ dout(10) << __func__ << dendl;
+ bool changed = false;
+ if (check_member_health()) {
+ changed = true;
+ }
+ if (!mon->is_leader()) {
+ return;
+ }
+ if (check_leader_health()) {
+ changed = true;
+ }
+ if (changed) {
+ propose_pending();
+ }
+}
+
+bool HealthMonitor::check_member_health()
+{
+ dout(20) << __func__ << dendl;
+ bool changed = false;
+
+ // snapshot of usage
+ DataStats stats;
+ get_fs_stats(stats.fs_stats, g_conf->mon_data.c_str());
+ map<string,uint64_t> extra;
+ uint64_t store_size = mon->store->get_estimated_size(extra);
+ assert(store_size > 0);
+ stats.store_stats.bytes_total = store_size;
+ stats.store_stats.bytes_sst = extra["sst"];
+ stats.store_stats.bytes_log = extra["log"];
+ stats.store_stats.bytes_misc = extra["misc"];
+ stats.last_update = ceph_clock_now();
+ dout(10) << __func__ << " avail " << stats.fs_stats.avail_percent << "%"
+ << " total " << prettybyte_t(stats.fs_stats.byte_total)
+ << ", used " << prettybyte_t(stats.fs_stats.byte_used)
+ << ", avail " << prettybyte_t(stats.fs_stats.byte_avail) << dendl;
+
+ // MON_DISK_{LOW,CRIT,BIG}
+ health_check_map_t next;
+ if (stats.fs_stats.avail_percent <= g_conf->mon_data_avail_crit) {
+ stringstream ss, ss2;
+ ss << "mon%plurals% %names% %isorare% very low on available space";
+ auto& d = next.add("MON_DISK_CRIT", HEALTH_ERR, ss.str());
+ ss2 << "mon." << mon->name << " has " << stats.fs_stats.avail_percent
+ << "% avail";
+ d.detail.push_back(ss2.str());
+ } else if (stats.fs_stats.avail_percent <= g_conf->mon_data_avail_warn) {
+ stringstream ss, ss2;
+ ss << "mon%plurals% %names% %isorare% low on available space";
+ auto& d = next.add("MON_DISK_LOW", HEALTH_WARN, ss.str());
+ ss2 << "mon." << mon->name << " has " << stats.fs_stats.avail_percent
+ << "% avail";
+ d.detail.push_back(ss2.str());
+ }
+ if (stats.store_stats.bytes_total >= g_conf->mon_data_size_warn) {
+ stringstream ss, ss2;
+ ss << "mon%plurals% %names% %isorare% using a lot of disk space";
+ auto& d = next.add("MON_DISK_BIG", HEALTH_WARN, ss.str());
+ ss2 << "mon." << mon->name << " is "
+ << prettybyte_t(stats.store_stats.bytes_total)
+ << " >= mon_data_size_warn ("
+ << prettybyte_t(g_conf->mon_data_size_warn) << ")";
+ d.detail.push_back(ss2.str());
+ }
+
+ // OSD_NO_DOWN_OUT_INTERVAL
+ {
+ // Warn if 'mon_osd_down_out_interval' is set to zero.
+ // Having this option set to zero on the leader acts much like the
+ // 'noout' flag. It's hard to figure out what's going wrong with clusters
+ // without the 'noout' flag set but acting like that just the same, so
+ // we report a HEALTH_WARN in case this option is set to zero.
+ // This is an ugly hack to get the warning out, but until we find a way
+ // to spread global options throughout the mon cluster and have all mons
+ // using a base set of the same options, we need to work around this sort
+ // of things.
+ // There's also the obvious drawback that if this is set on a single
+ // monitor on a 3-monitor cluster, this warning will only be shown every
+ // third monitor connection.
+ if (g_conf->mon_warn_on_osd_down_out_interval_zero &&
+ g_conf->mon_osd_down_out_interval == 0) {
+ ostringstream ss, ds;
+ ss << "mon%plurals% %names% %hasorhave% mon_osd_down_out_interval set to 0";
+ auto& d = next.add("OSD_NO_DOWN_OUT_INTERVAL", HEALTH_WARN, ss.str());
+ ds << "mon." << mon->name << " has mon_osd_down_out_interval set to 0";
+ d.detail.push_back(ds.str());
+ }
+ }
+
+ auto p = quorum_checks.find(mon->rank);
+ if (p == quorum_checks.end()) {
+ if (next.empty()) {
+ return false;
+ }
+ } else {
+ if (p->second == next) {
+ return false;
+ }
+ }
+
+ if (mon->is_leader()) {
+ // prepare to propose
+ quorum_checks[mon->rank] = next;
+ changed = true;
+ } else {
+ // tell the leader
+ mon->messenger->send_message(new MMonHealthChecks(next),
+ mon->monmap->get_inst(mon->get_leader()));
+ }
+
+ return changed;
+}
+
+bool HealthMonitor::check_leader_health()
+{
+ dout(20) << __func__ << dendl;
+ bool changed = false;
+
+ // prune quorum_health
+ {
+ auto& qset = mon->get_quorum();
+ auto p = quorum_checks.begin();
+ while (p != quorum_checks.end()) {
+ if (qset.count(p->first) == 0) {
+ p = quorum_checks.erase(p);
+ changed = true;
+ } else {
+ ++p;
+ }
+ }
+ }
+
+ health_check_map_t next;
+
+ // MON_DOWN
+ {
+ int max = mon->monmap->size();
+ int actual = mon->get_quorum().size();
+ if (actual < max) {
+ ostringstream ss;
+ ss << (max-actual) << "/" << max << " mons down, quorum "
+ << mon->get_quorum_names();
+ auto& d = next.add("MON_DOWN", HEALTH_WARN, ss.str());
+ set<int> q = mon->get_quorum();
+ for (int i=0; i<max; i++) {
+ if (q.count(i) == 0) {
+ ostringstream ss;
+ ss << "mon." << mon->monmap->get_name(i) << " (rank " << i
+ << ") addr " << mon->monmap->get_addr(i)
+ << " is down (out of quorum)";
+ d.detail.push_back(ss.str());
+ }
+ }
+ }
+ }
+
+ // MON_CLOCK_SKEW
+ if (!mon->timecheck_skews.empty()) {
+ list<string> warns;
+ list<string> details;
+ for (map<entity_inst_t,double>::iterator i = mon->timecheck_skews.begin();
+ i != mon->timecheck_skews.end(); ++i) {
+ entity_inst_t inst = i->first;
+ double skew = i->second;
+ double latency = mon->timecheck_latencies[inst];
+ string name = mon->monmap->get_name(inst.addr);
+ ostringstream tcss;
+ health_status_t tcstatus = mon->timecheck_status(tcss, skew, latency);
+ if (tcstatus != HEALTH_OK) {
+ warns.push_back(name);
+ ostringstream tmp_ss;
+ tmp_ss << "mon." << name
+ << " addr " << inst.addr << " " << tcss.str()
+ << " (latency " << latency << "s)";
+ details.push_back(tmp_ss.str());
+ }
+ }
+ if (!warns.empty()) {
+ ostringstream ss;
+ ss << "clock skew detected on";
+ while (!warns.empty()) {
+ ss << " mon." << warns.front();
+ warns.pop_front();
+ if (!warns.empty())
+ ss << ",";
+ }
+ auto& d = next.add("MON_CLOCK_SKEW", HEALTH_WARN, ss.str());
+ d.detail.swap(details);
+ }
+ }
+
+ if (next != leader_checks) {
+ changed = true;
+ leader_checks = next;
+ }
+ return changed;
+}
Code Review / stor4nfv.git / blobdiff