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MgrMonitor.cc
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MgrMonitor.cc
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// -*- 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) 2016 John Spray <john.spray@redhat.com>
*
* 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 <boost/tokenizer.hpp>
#include "messages/MMgrBeacon.h"
#include "messages/MMgrMap.h"
#include "messages/MMgrDigest.h"
#include "include/stringify.h"
#include "mgr/MgrContext.h"
#include "mgr/mgr_commands.h"
#include "OSDMonitor.h"
#include "ConfigMonitor.h"
#include "HealthMonitor.h"
#include "MgrMonitor.h"
#define MGR_METADATA_PREFIX "mgr_metadata"
#define dout_subsys ceph_subsys_mon
#undef dout_prefix
#define dout_prefix _prefix(_dout, mon, map)
using namespace TOPNSPC::common;
using std::dec;
using std::hex;
using std::list;
using std::map;
using std::make_pair;
using std::ostream;
using std::ostringstream;
using std::pair;
using std::set;
using std::string;
using std::stringstream;
using std::to_string;
using std::vector;
using ceph::bufferlist;
using ceph::decode;
using ceph::encode;
using ceph::ErasureCodeInterfaceRef;
using ceph::ErasureCodeProfile;
using ceph::Formatter;
using ceph::JSONFormatter;
using ceph::make_message;
using ceph::mono_clock;
using ceph::mono_time;
static ostream& _prefix(std::ostream *_dout, Monitor &mon,
const MgrMap& mgrmap) {
return *_dout << "mon." << mon.name << "@" << mon.rank
<< "(" << mon.get_state_name()
<< ").mgr e" << mgrmap.get_epoch() << " ";
}
// the system treats always_on_modules as if they provide built-in functionality
// by ensuring that they are always enabled.
const static std::map<uint32_t, std::set<std::string>> always_on_modules = {
{
CEPH_RELEASE_NAUTILUS, {
"crash",
"status",
"progress",
"balancer",
"devicehealth",
"orchestrator_cli",
"rbd_support",
"volumes",
}
},
{
CEPH_RELEASE_OCTOPUS, {
"crash",
"status",
"progress",
"balancer",
"devicehealth",
"orchestrator",
"rbd_support",
"volumes",
"pg_autoscaler",
"telemetry",
}
},
{
CEPH_RELEASE_PACIFIC, {
"crash",
"status",
"progress",
"balancer",
"devicehealth",
"orchestrator",
"rbd_support",
"volumes",
"pg_autoscaler",
"telemetry",
}
},
{
CEPH_RELEASE_QUINCY, {
"crash",
"status",
"progress",
"balancer",
"devicehealth",
"orchestrator",
"rbd_support",
"volumes",
"pg_autoscaler",
"telemetry",
}
},
};
// Prefix for mon store of active mgr's command descriptions
const static std::string command_descs_prefix = "mgr_command_descs";
const Option *MgrMonitor::find_module_option(const string& name)
{
// we have two forms of names: "mgr/$module/$option" and
// localized "mgr/$module/$instance/$option". normalize to the
// former by stripping out $instance.
string real_name;
if (name.substr(0, 4) != "mgr/") {
return nullptr;
}
auto second_slash = name.find('/', 5);
if (second_slash == std::string::npos) {
return nullptr;
}
auto third_slash = name.find('/', second_slash + 1);
if (third_slash != std::string::npos) {
// drop the $instance part between the second and third slash
real_name = name.substr(0, second_slash) + name.substr(third_slash);
} else {
real_name = name;
}
auto p = mgr_module_options.find(real_name);
if (p != mgr_module_options.end()) {
return &p->second;
}
return nullptr;
}
version_t MgrMonitor::get_trim_to() const
{
int64_t max = g_conf().get_val<int64_t>("mon_max_mgrmap_epochs");
if (map.epoch > max) {
return map.epoch - max;
}
return 0;
}
void MgrMonitor::create_initial()
{
// Take a local copy of initial_modules for tokenizer to iterate over.
auto initial_modules = g_conf().get_val<std::string>("mgr_initial_modules");
boost::tokenizer<> tok(initial_modules);
for (auto& m : tok) {
pending_map.modules.insert(m);
}
pending_map.always_on_modules = always_on_modules;
pending_command_descs = mgr_commands;
dout(10) << __func__ << " initial modules " << pending_map.modules
<< ", always on modules " << pending_map.get_always_on_modules()
<< ", " << pending_command_descs.size() << " commands"
<< dendl;
}
void MgrMonitor::get_store_prefixes(std::set<string>& s) const
{
s.insert(service_name);
s.insert(command_descs_prefix);
s.insert(MGR_METADATA_PREFIX);
}
void MgrMonitor::update_from_paxos(bool *need_bootstrap)
{
version_t version = get_last_committed();
if (version != map.epoch) {
dout(4) << "loading version " << version << dendl;
bufferlist bl;
int err = get_version(version, bl);
ceph_assert(err == 0);
bool old_available = map.get_available();
uint64_t old_gid = map.get_active_gid();
auto p = bl.cbegin();
map.decode(p);
dout(4) << "active server: " << map.active_addrs
<< "(" << map.active_gid << ")" << dendl;
ever_had_active_mgr = get_value("ever_had_active_mgr");
load_health();
if (map.available) {
first_seen_inactive = utime_t();
} else {
first_seen_inactive = ceph_clock_now();
}
check_subs();
if (version == 1
|| command_descs.empty()
|| (map.get_available()
&& (!old_available || old_gid != map.get_active_gid()))) {
dout(4) << "mkfs or daemon transitioned to available, loading commands"
<< dendl;
bufferlist loaded_commands;
int r = mon.store->get(command_descs_prefix, "", loaded_commands);
if (r < 0) {
derr << "Failed to load mgr commands: " << cpp_strerror(r) << dendl;
} else {
auto p = loaded_commands.cbegin();
decode(command_descs, p);
}
}
}
// populate module options
mgr_module_options.clear();
misc_option_strings.clear();
for (auto& i : map.available_modules) {
for (auto& j : i.module_options) {
string name = string("mgr/") + i.name + "/" + j.second.name;
auto p = mgr_module_options.emplace(
name,
Option(name, static_cast<Option::type_t>(j.second.type),
static_cast<Option::level_t>(j.second.level)));
Option& opt = p.first->second;
opt.set_flags(static_cast<Option::flag_t>(j.second.flags));
opt.set_flag(Option::FLAG_MGR);
opt.set_description(j.second.desc.c_str());
opt.set_long_description(j.second.long_desc.c_str());
for (auto& k : j.second.tags) {
opt.add_tag(k.c_str());
}
for (auto& k : j.second.see_also) {
if (i.module_options.count(k)) {
// it's another module option
misc_option_strings.push_back(string("mgr/") + i.name + "/" + k);
opt.add_see_also(misc_option_strings.back().c_str());
} else {
// it's a native option
opt.add_see_also(k.c_str());
}
}
Option::value_t v, v2;
std::string err;
if (j.second.default_value.size() &&
!opt.parse_value(j.second.default_value, &v, &err)) {
opt.set_default(v);
}
if (j.second.min.size() &&
j.second.max.size() &&
!opt.parse_value(j.second.min, &v, &err) &&
!opt.parse_value(j.second.max, &v2, &err)) {
opt.set_min_max(v, v2);
}
std::vector<const char *> enum_allowed;
for (auto& k : j.second.enum_allowed) {
enum_allowed.push_back(k.c_str());
}
opt.set_enum_allowed(enum_allowed);
}
}
// force ConfigMonitor to refresh, since it uses const Option *
// pointers into our mgr_module_options (which we just rebuilt).
mon.configmon()->load_config();
if (!mon.is_init()) {
// feed our pet MgrClient, unless we are in Monitor::[pre]init()
prime_mgr_client();
}
}
void MgrMonitor::prime_mgr_client()
{
dout(10) << __func__ << dendl;
mon.mgr_client.ms_dispatch2(make_message<MMgrMap>(map));
}
void MgrMonitor::create_pending()
{
pending_map = map;
pending_map.epoch++;
}
health_status_t MgrMonitor::should_warn_about_mgr_down()
{
utime_t now = ceph_clock_now();
// we warn if we have osds AND we've exceeded the grace period
// which means a new mon cluster and be HEALTH_OK indefinitely as long as
// no OSDs are ever created.
if (mon.osdmon()->osdmap.get_num_osds() > 0 &&
now > mon.monmap->created + g_conf().get_val<int64_t>("mon_mgr_mkfs_grace")) {
health_status_t level = HEALTH_WARN;
if (first_seen_inactive != utime_t() &&
now - first_seen_inactive > g_conf().get_val<int64_t>("mon_mgr_inactive_grace")) {
level = HEALTH_ERR;
}
return level;
}
return HEALTH_OK;
}
void MgrMonitor::post_paxos_update()
{
// are we handling digest subscribers?
if (digest_event) {
bool send = false;
if (prev_health_checks.empty()) {
prev_health_checks.resize(mon.paxos_service.size());
send = true;
}
ceph_assert(prev_health_checks.size() == mon.paxos_service.size());
for (auto i = 0u; i < prev_health_checks.size(); i++) {
const auto& curr = mon.paxos_service[i]->get_health_checks();
if (!send && curr != prev_health_checks[i]) {
send = true;
}
prev_health_checks[i] = curr;
}
if (send) {
if (is_active()) {
send_digests();
} else {
cancel_timer();
wait_for_active_ctx(new C_MonContext{&mon, [this](int) {
send_digests();
}});
}
}
}
}
void MgrMonitor::encode_pending(MonitorDBStore::TransactionRef t)
{
dout(10) << __func__ << " " << pending_map << dendl;
bufferlist bl;
pending_map.encode(bl, mon.get_quorum_con_features());
put_version(t, pending_map.epoch, bl);
put_last_committed(t, pending_map.epoch);
for (auto& p : pending_metadata) {
dout(10) << __func__ << " set metadata for " << p.first << dendl;
t->put(MGR_METADATA_PREFIX, p.first, p.second);
}
for (auto& name : pending_metadata_rm) {
dout(10) << __func__ << " rm metadata for " << name << dendl;
t->erase(MGR_METADATA_PREFIX, name);
}
pending_metadata.clear();
pending_metadata_rm.clear();
health_check_map_t next;
if (pending_map.active_gid == 0) {
auto level = should_warn_about_mgr_down();
if (level != HEALTH_OK) {
next.add("MGR_DOWN", level, "no active mgr", 0);
} else {
dout(10) << __func__ << " no health warning (never active and new cluster)"
<< dendl;
}
} else {
put_value(t, "ever_had_active_mgr", 1);
}
encode_health(next, t);
if (pending_command_descs.size()) {
dout(4) << __func__ << " encoding " << pending_command_descs.size()
<< " command_descs" << dendl;
for (auto& p : pending_command_descs) {
p.set_flag(MonCommand::FLAG_MGR);
}
bufferlist bl;
encode(pending_command_descs, bl);
t->put(command_descs_prefix, "", bl);
pending_command_descs.clear();
}
}
bool MgrMonitor::check_caps(MonOpRequestRef op, const uuid_d& fsid)
{
// check permissions
MonSession *session = op->get_session();
if (!session)
return false;
if (!session->is_capable("mgr", MON_CAP_X)) {
dout(1) << __func__ << " insufficient caps " << session->caps << dendl;
return false;
}
if (fsid != mon.monmap->fsid) {
dout(1) << __func__ << " op fsid " << fsid
<< " != " << mon.monmap->fsid << dendl;
return false;
}
return true;
}
bool MgrMonitor::preprocess_query(MonOpRequestRef op)
{
auto m = op->get_req<PaxosServiceMessage>();
switch (m->get_type()) {
case MSG_MGR_BEACON:
return preprocess_beacon(op);
case MSG_MON_COMMAND:
try {
return preprocess_command(op);
} catch (const bad_cmd_get& e) {
bufferlist bl;
mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed());
return true;
}
default:
mon.no_reply(op);
derr << "Unhandled message type " << m->get_type() << dendl;
return true;
}
}
bool MgrMonitor::prepare_update(MonOpRequestRef op)
{
auto m = op->get_req<PaxosServiceMessage>();
switch (m->get_type()) {
case MSG_MGR_BEACON:
return prepare_beacon(op);
case MSG_MON_COMMAND:
try {
return prepare_command(op);
} catch (const bad_cmd_get& e) {
bufferlist bl;
mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed());
return true;
}
default:
mon.no_reply(op);
derr << "Unhandled message type " << m->get_type() << dendl;
return true;
}
}
class C_Updated : public Context {
MgrMonitor *mm;
MonOpRequestRef op;
public:
C_Updated(MgrMonitor *a, MonOpRequestRef c) :
mm(a), op(c) {}
void finish(int r) override {
if (r >= 0) {
// Success
} else if (r == -ECANCELED) {
mm->mon.no_reply(op);
} else {
mm->dispatch(op); // try again
}
}
};
bool MgrMonitor::preprocess_beacon(MonOpRequestRef op)
{
auto m = op->get_req<MMgrBeacon>();
mon.no_reply(op); // we never reply to beacons
dout(4) << "beacon from " << m->get_gid() << dendl;
if (!check_caps(op, m->get_fsid())) {
// drop it on the floor
return true;
}
// always send this to the leader's prepare_beacon()
return false;
}
bool MgrMonitor::prepare_beacon(MonOpRequestRef op)
{
auto m = op->get_req<MMgrBeacon>();
dout(4) << "beacon from " << m->get_gid() << dendl;
// See if we are seeing same name, new GID for the active daemon
if (m->get_name() == pending_map.active_name
&& m->get_gid() != pending_map.active_gid)
{
dout(4) << "Active daemon restart (mgr." << m->get_name() << ")" << dendl;
mon.clog->info() << "Active manager daemon " << m->get_name()
<< " restarted";
if (!mon.osdmon()->is_writeable()) {
dout(1) << __func__ << ": waiting for osdmon writeable to"
" blocklist old instance." << dendl;
mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op));
return false;
}
drop_active();
}
// See if we are seeing same name, new GID for any standbys
for (const auto &i : pending_map.standbys) {
const MgrMap::StandbyInfo &s = i.second;
if (s.name == m->get_name() && s.gid != m->get_gid()) {
dout(4) << "Standby daemon restart (mgr." << m->get_name() << ")" << dendl;
mon.clog->debug() << "Standby manager daemon " << m->get_name()
<< " restarted";
drop_standby(i.first);
break;
}
}
last_beacon[m->get_gid()] = ceph::coarse_mono_clock::now();
// Track whether we modified pending_map
bool updated = false;
if (pending_map.active_gid == m->get_gid()) {
if (pending_map.services != m->get_services()) {
dout(4) << "updated services from mgr." << m->get_name()
<< ": " << m->get_services() << dendl;
pending_map.services = m->get_services();
updated = true;
}
// A beacon from the currently active daemon
if (pending_map.active_addrs != m->get_server_addrs()) {
dout(4) << "learned address " << m->get_server_addrs()
<< " (was " << pending_map.active_addrs << ")" << dendl;
pending_map.active_addrs = m->get_server_addrs();
updated = true;
}
if (pending_map.get_available() != m->get_available()) {
dout(4) << "available " << m->get_gid() << dendl;
mon.clog->info() << "Manager daemon " << pending_map.active_name
<< " is now available";
// This beacon should include command descriptions
pending_command_descs = m->get_command_descs();
if (pending_command_descs.empty()) {
// This should not happen, but it also isn't fatal: we just
// won't successfully update our list of commands.
dout(4) << "First available beacon from " << pending_map.active_name
<< "(" << m->get_gid() << ") does not include command descs"
<< dendl;
} else {
dout(4) << "First available beacon from " << pending_map.active_name
<< "(" << m->get_gid() << ") includes "
<< pending_command_descs.size() << " command descs" << dendl;
}
pending_map.available = m->get_available();
updated = true;
}
if (pending_map.available_modules != m->get_available_modules()) {
dout(4) << "available_modules " << m->get_available_modules()
<< " (was " << pending_map.available_modules << ")" << dendl;
pending_map.available_modules = m->get_available_modules();
updated = true;
}
const auto& clients = m->get_clients();
if (pending_map.clients != clients) {
dout(4) << "active's RADOS clients " << clients
<< " (was " << pending_map.clients << ")" << dendl;
pending_map.clients = clients;
updated = true;
}
} else if (pending_map.active_gid == 0) {
// There is no currently active daemon, select this one.
if (pending_map.standbys.count(m->get_gid())) {
drop_standby(m->get_gid(), false);
}
dout(4) << "selecting new active " << m->get_gid()
<< " " << m->get_name()
<< " (was " << pending_map.active_gid << " "
<< pending_map.active_name << ")" << dendl;
pending_map.active_gid = m->get_gid();
pending_map.active_name = m->get_name();
pending_map.active_change = ceph_clock_now();
pending_map.active_mgr_features = m->get_mgr_features();
pending_map.available_modules = m->get_available_modules();
encode(m->get_metadata(), pending_metadata[m->get_name()]);
pending_metadata_rm.erase(m->get_name());
mon.clog->info() << "Activating manager daemon "
<< pending_map.active_name;
updated = true;
} else {
if (pending_map.standbys.count(m->get_gid()) > 0) {
dout(10) << "from existing standby " << m->get_gid() << dendl;
if (pending_map.standbys[m->get_gid()].available_modules !=
m->get_available_modules()) {
dout(10) << "existing standby " << m->get_gid() << " available_modules "
<< m->get_available_modules() << " (was "
<< pending_map.standbys[m->get_gid()].available_modules << ")"
<< dendl;
pending_map.standbys[m->get_gid()].available_modules =
m->get_available_modules();
updated = true;
}
} else {
dout(10) << "new standby " << m->get_gid() << dendl;
mon.clog->debug() << "Standby manager daemon " << m->get_name()
<< " started";
pending_map.standbys[m->get_gid()] = {m->get_gid(), m->get_name(),
m->get_available_modules(),
m->get_mgr_features()};
encode(m->get_metadata(), pending_metadata[m->get_name()]);
pending_metadata_rm.erase(m->get_name());
updated = true;
}
}
if (updated) {
dout(4) << "updating map" << dendl;
wait_for_finished_proposal(op, new C_Updated(this, op));
} else {
dout(10) << "no change" << dendl;
}
return updated;
}
void MgrMonitor::check_subs()
{
const std::string type = "mgrmap";
if (mon.session_map.subs.count(type) == 0)
return;
for (auto sub : *(mon.session_map.subs[type])) {
check_sub(sub);
}
}
void MgrMonitor::check_sub(Subscription *sub)
{
if (sub->type == "mgrmap") {
if (sub->next <= map.get_epoch()) {
dout(20) << "Sending map to subscriber " << sub->session->con
<< " " << sub->session->con->get_peer_addr() << dendl;
sub->session->con->send_message2(make_message<MMgrMap>(map));
if (sub->onetime) {
mon.session_map.remove_sub(sub);
} else {
sub->next = map.get_epoch() + 1;
}
}
} else {
ceph_assert(sub->type == "mgrdigest");
if (sub->next == 0) {
// new registration; cancel previous timer
cancel_timer();
}
if (digest_event == nullptr) {
send_digests();
}
}
}
/**
* Handle digest subscriptions separately (outside of check_sub) because
* they are going to be periodic rather than version-driven.
*/
void MgrMonitor::send_digests()
{
cancel_timer();
const std::string type = "mgrdigest";
if (mon.session_map.subs.count(type) == 0) {
prev_health_checks.clear();
return;
}
if (!is_active()) {
// if paxos is currently not active, don't send a digest but reenable timer
goto timer;
}
dout(10) << __func__ << dendl;
for (auto sub : *(mon.session_map.subs[type])) {
dout(10) << __func__ << " sending digest to subscriber " << sub->session->con
<< " " << sub->session->con->get_peer_addr() << dendl;
auto mdigest = make_message<MMgrDigest>();
JSONFormatter f;
mon.healthmon()->get_health_status(true, &f, nullptr, nullptr, nullptr);
f.flush(mdigest->health_json);
f.reset();
mon.get_mon_status(&f);
f.flush(mdigest->mon_status_json);
f.reset();
sub->session->con->send_message2(mdigest);
}
timer:
digest_event = mon.timer.add_event_after(
g_conf().get_val<int64_t>("mon_mgr_digest_period"),
new C_MonContext{&mon, [this](int) {
send_digests();
}});
}
void MgrMonitor::cancel_timer()
{
if (digest_event) {
mon.timer.cancel_event(digest_event);
digest_event = nullptr;
}
}
void MgrMonitor::on_active()
{
if (!mon.is_leader()) {
return;
}
mon.clog->debug() << "mgrmap e" << map.epoch << ": " << map;
assert(HAVE_FEATURE(mon.get_quorum_con_features(), SERVER_NAUTILUS));
if (pending_map.always_on_modules == always_on_modules) {
return;
}
dout(4) << "always on modules changed, pending "
<< pending_map.always_on_modules << " != wanted "
<< always_on_modules << dendl;
pending_map.always_on_modules = always_on_modules;
propose_pending();
}
void MgrMonitor::tick()
{
if (!is_active() || !mon.is_leader())
return;
const auto now = ceph::coarse_mono_clock::now();
const auto mgr_beacon_grace =
g_conf().get_val<std::chrono::seconds>("mon_mgr_beacon_grace");
// Note that this is the mgr daemon's tick period, not ours (the
// beacon is sent with this period).
const auto mgr_tick_period =
g_conf().get_val<std::chrono::seconds>("mgr_tick_period");
if (last_tick != ceph::coarse_mono_clock::time_point::min()
&& (now - last_tick > (mgr_beacon_grace - mgr_tick_period))) {
// This case handles either local slowness (calls being delayed
// for whatever reason) or cluster election slowness (a long gap
// between calls while an election happened)
dout(4) << __func__ << ": resetting beacon timeouts due to mon delay "
"(slow election?) of " << now - last_tick << " seconds" << dendl;
for (auto &i : last_beacon) {
i.second = now;
}
}
last_tick = now;
// Populate any missing beacons (i.e. no beacon since MgrMonitor
// instantiation) with the current time, so that they will
// eventually look laggy if they fail to give us a beacon.
if (pending_map.active_gid != 0
&& last_beacon.count(pending_map.active_gid) == 0) {
last_beacon[pending_map.active_gid] = now;
}
for (auto s : pending_map.standbys) {
if (last_beacon.count(s.first) == 0) {
last_beacon[s.first] = now;
}
}
// Cull standbys first so that any remaining standbys
// will be eligible to take over from the active if we cull him.
std::list<uint64_t> dead_standbys;
const auto cutoff = now - mgr_beacon_grace;
for (const auto &i : pending_map.standbys) {
auto last_beacon_time = last_beacon.at(i.first);
if (last_beacon_time < cutoff) {
dead_standbys.push_back(i.first);
}
}
bool propose = false;
for (auto i : dead_standbys) {
dout(4) << "Dropping laggy standby " << i << dendl;
drop_standby(i);
propose = true;
}
if (pending_map.active_gid != 0
&& last_beacon.at(pending_map.active_gid) < cutoff
&& mon.osdmon()->is_writeable()) {
const std::string old_active_name = pending_map.active_name;
drop_active();
propose = true;
dout(4) << "Dropping active" << pending_map.active_gid << dendl;
if (promote_standby()) {
dout(4) << "Promoted standby " << pending_map.active_gid << dendl;
mon.clog->info() << "Manager daemon " << old_active_name
<< " is unresponsive, replacing it with standby"
<< " daemon " << pending_map.active_name;
} else {
dout(4) << "Active is laggy but have no standbys to replace it" << dendl;
mon.clog->info() << "Manager daemon " << old_active_name
<< " is unresponsive. No standby daemons available.";
}
} else if (pending_map.active_gid == 0) {
if (promote_standby()) {
dout(4) << "Promoted standby " << pending_map.active_gid << dendl;
mon.clog->info() << "Activating manager daemon "
<< pending_map.active_name;
propose = true;
}
}
if (!pending_map.available &&
!ever_had_active_mgr &&
should_warn_about_mgr_down() != HEALTH_OK) {
dout(10) << " exceeded mon_mgr_mkfs_grace "
<< g_conf().get_val<int64_t>("mon_mgr_mkfs_grace")
<< " seconds" << dendl;
propose = true;
}
// obsolete modules?
if (mon.monmap->min_mon_release >= ceph_release_t::octopus &&
pending_map.module_enabled("orchestrator_cli")) {
dout(10) << " disabling obsolete/renamed 'orchestrator_cli'" << dendl;
// we don't need to enable 'orchestrator' because it's now always-on
pending_map.modules.erase("orchestrator_cli");
propose = true;
}
if (propose) {
propose_pending();
}
}
void MgrMonitor::on_restart()
{
// Clear out the leader-specific state.
last_beacon.clear();
last_tick = ceph::coarse_mono_clock::now();
}
bool MgrMonitor::promote_standby()
{
ceph_assert(pending_map.active_gid == 0);
if (pending_map.standbys.size()) {
// Promote a replacement (arbitrary choice of standby)
auto replacement_gid = pending_map.standbys.begin()->first;
pending_map.active_gid = replacement_gid;
pending_map.active_name = pending_map.standbys.at(replacement_gid).name;
pending_map.available_modules =
pending_map.standbys.at(replacement_gid).available_modules;
pending_map.active_mgr_features =
pending_map.standbys.at(replacement_gid).mgr_features;
pending_map.available = false;
pending_map.active_addrs = entity_addrvec_t();
pending_map.active_change = ceph_clock_now();
drop_standby(replacement_gid, false);
return true;
} else {
return false;
}
}
void MgrMonitor::drop_active()
{
ceph_assert(mon.osdmon()->is_writeable());
if (last_beacon.count(pending_map.active_gid) > 0) {
last_beacon.erase(pending_map.active_gid);
}
ceph_assert(pending_map.active_gid > 0);
auto until = ceph_clock_now();
until += g_conf().get_val<double>("mon_mgr_blocklist_interval");
dout(5) << "blocklisting previous mgr." << pending_map.active_name << "."
<< pending_map.active_gid << " ("
<< pending_map.active_addrs << ")" << dendl;
auto blocklist_epoch = mon.osdmon()->blocklist(pending_map.active_addrs, until);
/* blocklist RADOS clients in use by the mgr */
for (const auto& a : pending_map.clients) {
mon.osdmon()->blocklist(a, until);
}
request_proposal(mon.osdmon());
pending_metadata_rm.insert(pending_map.active_name);
pending_metadata.erase(pending_map.active_name);
pending_map.active_name = "";
pending_map.active_gid = 0;
pending_map.active_change = ceph_clock_now();
pending_map.active_mgr_features = 0;
pending_map.available = false;
pending_map.active_addrs = entity_addrvec_t();
pending_map.services.clear();
pending_map.clients.clear();
pending_map.last_failure_osd_epoch = blocklist_epoch;
// So that when new active mgr subscribes to mgrdigest, it will
// get an immediate response instead of waiting for next timer
cancel_timer();
}
void MgrMonitor::drop_standby(uint64_t gid, bool drop_meta)
{
if (drop_meta) {
pending_metadata_rm.insert(pending_map.standbys[gid].name);
pending_metadata.erase(pending_map.standbys[gid].name);
}
pending_map.standbys.erase(gid);
if (last_beacon.count(gid) > 0) {
last_beacon.erase(gid);
}
}
bool MgrMonitor::preprocess_command(MonOpRequestRef op)
{
auto m = op->get_req<MMonCommand>();
std::stringstream ss;
bufferlist rdata;
cmdmap_t cmdmap;
if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) {
string rs = ss.str();
mon.reply_command(op, -EINVAL, rs, rdata, get_last_committed());
return true;
}
MonSession *session = op->get_session();
if (!session) {
mon.reply_command(op, -EACCES, "access denied", rdata,
get_last_committed());
return true;
}
string format;
cmd_getval(cmdmap, "format", format);
boost::scoped_ptr<Formatter> f(Formatter::create(format, "json-pretty",
"json-pretty"));
string prefix;
cmd_getval(cmdmap, "prefix", prefix);
int r = 0;
if (prefix == "mgr stat") {
f->open_object_section("stat");
f->dump_unsigned("epoch", map.get_epoch());
f->dump_bool("available", map.get_available());
f->dump_string("active_name", map.get_active_name());
f->dump_unsigned("num_standby", map.get_num_standby());
f->close_section();
f->flush(rdata);
} else if (prefix == "mgr dump") {
int64_t epoch = 0;
cmd_getval(cmdmap, "epoch", epoch, (int64_t)map.get_epoch());
if (epoch == (int64_t)map.get_epoch()) {
f->dump_object("mgrmap", map);
} else {
bufferlist bl;
int err = get_version(epoch, bl);
if (err == -ENOENT) {
r = -ENOENT;
ss << "there is no map for epoch " << epoch;
goto reply;
}
MgrMap m;
auto p = bl.cbegin();
m.decode(p);
f->dump_object("mgrmap", m);
}
f->flush(rdata);
} else if (prefix == "mgr module ls") {
f->open_object_section("modules");
{
f->open_array_section("always_on_modules");