/
MonClient.cc
2008 lines (1816 loc) · 55.1 KB
/
MonClient.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) 2004-2006 Sage Weil <sage@newdream.net>
*
* 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 <algorithm>
#include <iterator>
#include <random>
#include <boost/range/adaptor/map.hpp>
#include <boost/range/adaptor/filtered.hpp>
#include <boost/range/algorithm/copy.hpp>
#include <boost/range/algorithm_ext/copy_n.hpp>
#include "common/weighted_shuffle.h"
#include "include/scope_guard.h"
#include "include/stringify.h"
#include "messages/MMonGetMap.h"
#include "messages/MMonGetVersion.h"
#include "messages/MMonGetVersionReply.h"
#include "messages/MMonMap.h"
#include "messages/MConfig.h"
#include "messages/MGetConfig.h"
#include "messages/MAuth.h"
#include "messages/MLogAck.h"
#include "messages/MAuthReply.h"
#include "messages/MMonCommand.h"
#include "messages/MMonCommandAck.h"
#include "messages/MCommand.h"
#include "messages/MCommandReply.h"
#include "messages/MPing.h"
#include "messages/MMonSubscribe.h"
#include "messages/MMonSubscribeAck.h"
#include "common/errno.h"
#include "common/hostname.h"
#include "common/LogClient.h"
#include "MonClient.h"
#include "MonMap.h"
#include "auth/Auth.h"
#include "auth/KeyRing.h"
#include "auth/AuthClientHandler.h"
#include "auth/AuthRegistry.h"
#include "auth/RotatingKeyRing.h"
#define dout_subsys ceph_subsys_monc
#undef dout_prefix
#define dout_prefix *_dout << "monclient" << (_hunting() ? "(hunting)":"") << ": "
using std::string;
MonClient::MonClient(CephContext *cct_) :
Dispatcher(cct_),
AuthServer(cct_),
messenger(NULL),
timer(cct_, monc_lock),
finisher(cct_),
initialized(false),
log_client(NULL),
more_log_pending(false),
want_monmap(true),
had_a_connection(false),
reopen_interval_multiplier(
cct_->_conf.get_val<double>("mon_client_hunt_interval_min_multiple")),
last_mon_command_tid(0),
version_req_id(0)
{}
MonClient::~MonClient()
{
}
int MonClient::build_initial_monmap()
{
ldout(cct, 10) << __func__ << dendl;
int r = monmap.build_initial(cct, false, std::cerr);
ldout(cct,10) << "monmap:\n";
monmap.print(*_dout);
*_dout << dendl;
return r;
}
int MonClient::get_monmap()
{
ldout(cct, 10) << __func__ << dendl;
std::unique_lock l(monc_lock);
sub.want("monmap", 0, 0);
if (!_opened())
_reopen_session();
map_cond.wait(l, [this] { return !want_monmap; });
ldout(cct, 10) << __func__ << " done" << dendl;
return 0;
}
int MonClient::get_monmap_and_config()
{
ldout(cct, 10) << __func__ << dendl;
ceph_assert(!messenger);
int tries = 10;
cct->init_crypto();
auto shutdown_crypto = make_scope_guard([this] {
cct->shutdown_crypto();
});
int r = build_initial_monmap();
if (r < 0) {
lderr(cct) << __func__ << " cannot identify monitors to contact" << dendl;
return r;
}
messenger = Messenger::create_client_messenger(
cct, "temp_mon_client");
ceph_assert(messenger);
messenger->add_dispatcher_head(this);
messenger->start();
auto shutdown_msgr = make_scope_guard([this] {
messenger->shutdown();
messenger->wait();
delete messenger;
messenger = nullptr;
if (!monmap.fsid.is_zero()) {
cct->_conf.set_val("fsid", stringify(monmap.fsid));
}
});
while (tries-- > 0) {
r = init();
if (r < 0) {
return r;
}
r = authenticate(cct->_conf->client_mount_timeout);
if (r == -ETIMEDOUT) {
shutdown();
continue;
}
if (r < 0) {
break;
}
{
std::unique_lock l(monc_lock);
if (monmap.get_epoch() &&
!monmap.persistent_features.contains_all(
ceph::features::mon::FEATURE_MIMIC)) {
ldout(cct,10) << __func__ << " pre-mimic monitor, no config to fetch"
<< dendl;
r = 0;
break;
}
while ((!got_config || monmap.get_epoch() == 0) && r == 0) {
ldout(cct,20) << __func__ << " waiting for monmap|config" << dendl;
map_cond.wait_for(l, ceph::make_timespan(
cct->_conf->mon_client_hunt_interval));
}
if (got_config) {
ldout(cct,10) << __func__ << " success" << dendl;
r = 0;
break;
}
}
lderr(cct) << __func__ << " failed to get config" << dendl;
shutdown();
continue;
}
shutdown();
return r;
}
/**
* Ping the monitor with id @p mon_id and set the resulting reply in
* the provided @p result_reply, if this last parameter is not NULL.
*
* So that we don't rely on the MonClient's default messenger, set up
* during connect(), we create our own messenger to comunicate with the
* specified monitor. This is advantageous in the following ways:
*
* - Isolate the ping procedure from the rest of the MonClient's operations,
* allowing us to not acquire or manage the big monc_lock, thus not
* having to block waiting for some other operation to finish before we
* can proceed.
* * for instance, we can ping mon.FOO even if we are currently hunting
* or blocked waiting for auth to complete with mon.BAR.
*
* - Ping a monitor prior to establishing a connection (using connect())
* and properly establish the MonClient's messenger. This frees us
* from dealing with the complex foo that happens in connect().
*
* We also don't rely on MonClient as a dispatcher for this messenger,
* unlike what happens with the MonClient's default messenger. This allows
* us to sandbox the whole ping, having it much as a separate entity in
* the MonClient class, considerably simplifying the handling and dispatching
* of messages without needing to consider monc_lock.
*
* Current drawback is that we will establish a messenger for each ping
* we want to issue, instead of keeping a single messenger instance that
* would be used for all pings.
*/
int MonClient::ping_monitor(const string &mon_id, string *result_reply)
{
ldout(cct, 10) << __func__ << dendl;
string new_mon_id;
if (monmap.contains("noname-"+mon_id)) {
new_mon_id = "noname-"+mon_id;
} else {
new_mon_id = mon_id;
}
if (new_mon_id.empty()) {
ldout(cct, 10) << __func__ << " specified mon id is empty!" << dendl;
return -EINVAL;
} else if (!monmap.contains(new_mon_id)) {
ldout(cct, 10) << __func__ << " no such monitor 'mon." << new_mon_id << "'"
<< dendl;
return -ENOENT;
}
// N.B. monc isn't initialized
auth_registry.refresh_config();
KeyRing keyring;
keyring.from_ceph_context(cct);
RotatingKeyRing rkeyring(cct, cct->get_module_type(), &keyring);
MonClientPinger *pinger = new MonClientPinger(cct,
&rkeyring,
result_reply);
Messenger *smsgr = Messenger::create_client_messenger(cct, "temp_ping_client");
smsgr->add_dispatcher_head(pinger);
smsgr->set_auth_client(pinger);
smsgr->start();
ConnectionRef con = smsgr->connect_to_mon(monmap.get_addrs(new_mon_id));
ldout(cct, 10) << __func__ << " ping mon." << new_mon_id
<< " " << con->get_peer_addr() << dendl;
pinger->mc.reset(new MonConnection(cct, con, 0, &auth_registry));
pinger->mc->start(monmap.get_epoch(), entity_name);
con->send_message(new MPing);
int ret = pinger->wait_for_reply(cct->_conf->mon_client_ping_timeout);
if (ret == 0) {
ldout(cct,10) << __func__ << " got ping reply" << dendl;
} else {
ret = -ret;
}
con->mark_down();
pinger->mc.reset();
smsgr->shutdown();
smsgr->wait();
delete smsgr;
delete pinger;
return ret;
}
bool MonClient::ms_dispatch(Message *m)
{
// we only care about these message types
switch (m->get_type()) {
case CEPH_MSG_MON_MAP:
case CEPH_MSG_AUTH_REPLY:
case CEPH_MSG_MON_SUBSCRIBE_ACK:
case CEPH_MSG_MON_GET_VERSION_REPLY:
case MSG_MON_COMMAND_ACK:
case MSG_COMMAND_REPLY:
case MSG_LOGACK:
case MSG_CONFIG:
break;
case CEPH_MSG_PING:
m->put();
return true;
default:
return false;
}
std::lock_guard lock(monc_lock);
if (!m->get_connection()->is_anon() &&
m->get_source().type() == CEPH_ENTITY_TYPE_MON) {
if (_hunting()) {
auto p = _find_pending_con(m->get_connection());
if (p == pending_cons.end()) {
// ignore any messages outside hunting sessions
ldout(cct, 10) << "discarding stray monitor message " << *m << dendl;
m->put();
return true;
}
} else if (!active_con || active_con->get_con() != m->get_connection()) {
// ignore any messages outside our session(s)
ldout(cct, 10) << "discarding stray monitor message " << *m << dendl;
m->put();
return true;
}
}
switch (m->get_type()) {
case CEPH_MSG_MON_MAP:
handle_monmap(static_cast<MMonMap*>(m));
if (passthrough_monmap) {
return false;
} else {
m->put();
}
break;
case CEPH_MSG_AUTH_REPLY:
handle_auth(static_cast<MAuthReply*>(m));
break;
case CEPH_MSG_MON_SUBSCRIBE_ACK:
handle_subscribe_ack(static_cast<MMonSubscribeAck*>(m));
break;
case CEPH_MSG_MON_GET_VERSION_REPLY:
handle_get_version_reply(static_cast<MMonGetVersionReply*>(m));
break;
case MSG_MON_COMMAND_ACK:
handle_mon_command_ack(static_cast<MMonCommandAck*>(m));
break;
case MSG_COMMAND_REPLY:
if (m->get_connection()->is_anon() &&
m->get_source().type() == CEPH_ENTITY_TYPE_MON) {
// this connection is from 'tell'... ignore everything except our command
// reply. (we'll get misc other message because we authenticated, but we
// don't need them.)
handle_command_reply(static_cast<MCommandReply*>(m));
return true;
}
// leave the message for another dispatch handler (e.g., Objecter)
return false;
case MSG_LOGACK:
if (log_client) {
log_client->handle_log_ack(static_cast<MLogAck*>(m));
m->put();
if (more_log_pending) {
send_log();
}
} else {
m->put();
}
break;
case MSG_CONFIG:
handle_config(static_cast<MConfig*>(m));
break;
}
return true;
}
void MonClient::send_log(bool flush)
{
if (log_client) {
auto lm = log_client->get_mon_log_message(flush);
if (lm)
_send_mon_message(std::move(lm));
more_log_pending = log_client->are_pending();
}
}
void MonClient::flush_log()
{
std::lock_guard l(monc_lock);
send_log();
}
/* Unlike all the other message-handling functions, we don't put away a reference
* because we want to support MMonMap passthrough to other Dispatchers. */
void MonClient::handle_monmap(MMonMap *m)
{
ldout(cct, 10) << __func__ << " " << *m << dendl;
auto con_addrs = m->get_source_addrs();
string old_name = monmap.get_name(con_addrs);
const auto old_epoch = monmap.get_epoch();
auto p = m->monmapbl.cbegin();
decode(monmap, p);
ldout(cct, 10) << " got monmap " << monmap.epoch
<< " from mon." << old_name
<< " (according to old e" << monmap.get_epoch() << ")"
<< dendl;
ldout(cct, 10) << "dump:\n";
monmap.print(*_dout);
*_dout << dendl;
if (old_epoch != monmap.get_epoch()) {
tried.clear();
}
if (old_name.size() == 0) {
ldout(cct,10) << " can't identify which mon we were connected to" << dendl;
_reopen_session();
} else {
auto new_name = monmap.get_name(con_addrs);
if (new_name.empty()) {
ldout(cct, 10) << "mon." << old_name << " at " << con_addrs
<< " went away" << dendl;
// can't find the mon we were talking to (above)
_reopen_session();
} else if (messenger->should_use_msgr2() &&
monmap.get_addrs(new_name).has_msgr2() &&
!con_addrs.has_msgr2()) {
ldout(cct,1) << " mon." << new_name << " has (v2) addrs "
<< monmap.get_addrs(new_name) << " but i'm connected to "
<< con_addrs << ", reconnecting" << dendl;
_reopen_session();
}
}
sub.got("monmap", monmap.get_epoch());
map_cond.notify_all();
want_monmap = false;
if (authenticate_err == 1) {
_finish_auth(0);
}
}
void MonClient::handle_config(MConfig *m)
{
ldout(cct,10) << __func__ << " " << *m << dendl;
finisher.queue(new LambdaContext([this, m](int r) {
cct->_conf.set_mon_vals(cct, m->config, config_cb);
if (config_notify_cb) {
config_notify_cb();
}
m->put();
}));
got_config = true;
map_cond.notify_all();
}
// ----------------------
int MonClient::init()
{
ldout(cct, 10) << __func__ << dendl;
entity_name = cct->_conf->name;
auth_registry.refresh_config();
std::lock_guard l(monc_lock);
keyring.reset(new KeyRing);
if (auth_registry.is_supported_method(messenger->get_mytype(),
CEPH_AUTH_CEPHX)) {
// this should succeed, because auth_registry just checked!
int r = keyring->from_ceph_context(cct);
if (r != 0) {
// but be somewhat graceful in case there was a race condition
lderr(cct) << "keyring not found" << dendl;
return r;
}
}
if (!auth_registry.any_supported_methods(messenger->get_mytype())) {
return -ENOENT;
}
rotating_secrets.reset(
new RotatingKeyRing(cct, cct->get_module_type(), keyring.get()));
initialized = true;
messenger->set_auth_client(this);
messenger->add_dispatcher_head(this);
timer.init();
finisher.start();
schedule_tick();
return 0;
}
void MonClient::shutdown()
{
ldout(cct, 10) << __func__ << dendl;
monc_lock.lock();
stopping = true;
while (!version_requests.empty()) {
version_requests.begin()->second->context->complete(-ECANCELED);
ldout(cct, 20) << __func__ << " canceling and discarding version request "
<< version_requests.begin()->second << dendl;
delete version_requests.begin()->second;
version_requests.erase(version_requests.begin());
}
while (!mon_commands.empty()) {
auto tid = mon_commands.begin()->first;
_cancel_mon_command(tid);
}
ldout(cct, 20) << __func__ << " discarding " << waiting_for_session.size()
<< " pending message(s)" << dendl;
waiting_for_session.clear();
active_con.reset();
pending_cons.clear();
auth.reset();
monc_lock.unlock();
if (initialized) {
finisher.wait_for_empty();
finisher.stop();
initialized = false;
}
monc_lock.lock();
timer.shutdown();
stopping = false;
monc_lock.unlock();
}
int MonClient::authenticate(double timeout)
{
std::unique_lock lock{monc_lock};
if (active_con) {
ldout(cct, 5) << "already authenticated" << dendl;
return 0;
}
sub.want("monmap", monmap.get_epoch() ? monmap.get_epoch() + 1 : 0, 0);
sub.want("config", 0, 0);
if (!_opened())
_reopen_session();
auto until = ceph::real_clock::now();
until += ceph::make_timespan(timeout);
if (timeout > 0.0)
ldout(cct, 10) << "authenticate will time out at " << until << dendl;
authenticate_err = 1; // == in progress
while (!active_con && authenticate_err >= 0) {
if (timeout > 0.0) {
auto r = auth_cond.wait_until(lock, until);
if (r == cv_status::timeout && !active_con) {
ldout(cct, 0) << "authenticate timed out after " << timeout << dendl;
authenticate_err = -ETIMEDOUT;
}
} else {
auth_cond.wait(lock);
}
}
if (active_con) {
ldout(cct, 5) << __func__ << " success, global_id "
<< active_con->get_global_id() << dendl;
// active_con should not have been set if there was an error
ceph_assert(authenticate_err >= 0);
authenticated = true;
}
if (authenticate_err < 0 && auth_registry.no_keyring_disabled_cephx()) {
lderr(cct) << __func__ << " NOTE: no keyring found; disabled cephx authentication" << dendl;
}
return authenticate_err;
}
void MonClient::handle_auth(MAuthReply *m)
{
ceph_assert(ceph_mutex_is_locked(monc_lock));
if (m->get_connection()->is_anon()) {
// anon connection, used for mon tell commands
for (auto& p : mon_commands) {
if (p.second->target_con == m->get_connection()) {
auto& mc = p.second->target_session;
int ret = mc->handle_auth(m, entity_name,
CEPH_ENTITY_TYPE_MON,
rotating_secrets.get());
(void)ret; // we don't care
break;
}
}
m->put();
return;
}
if (!_hunting()) {
std::swap(active_con->get_auth(), auth);
int ret = active_con->authenticate(m);
m->put();
std::swap(auth, active_con->get_auth());
if (global_id != active_con->get_global_id()) {
lderr(cct) << __func__ << " peer assigned me a different global_id: "
<< active_con->get_global_id() << dendl;
}
if (ret != -EAGAIN) {
_finish_auth(ret);
}
return;
}
// hunting
auto found = _find_pending_con(m->get_connection());
ceph_assert(found != pending_cons.end());
int auth_err = found->second.handle_auth(m, entity_name, want_keys,
rotating_secrets.get());
m->put();
if (auth_err == -EAGAIN) {
return;
}
if (auth_err) {
pending_cons.erase(found);
if (!pending_cons.empty()) {
// keep trying with pending connections
return;
}
// the last try just failed, give up.
} else {
auto& mc = found->second;
ceph_assert(mc.have_session());
active_con.reset(new MonConnection(std::move(mc)));
pending_cons.clear();
}
_finish_hunting(auth_err);
_finish_auth(auth_err);
}
void MonClient::_finish_auth(int auth_err)
{
ldout(cct,10) << __func__ << " " << auth_err << dendl;
authenticate_err = auth_err;
// _resend_mon_commands() could _reopen_session() if the connected mon is not
// the one the MonCommand is targeting.
if (!auth_err && active_con) {
ceph_assert(auth);
_check_auth_tickets();
}
auth_cond.notify_all();
if (!auth_err) {
Context *cb = nullptr;
if (session_established_context) {
cb = session_established_context.release();
}
if (cb) {
monc_lock.unlock();
cb->complete(0);
monc_lock.lock();
}
}
}
// ---------
void MonClient::send_mon_message(MessageRef m)
{
std::lock_guard l{monc_lock};
_send_mon_message(std::move(m));
}
void MonClient::_send_mon_message(MessageRef m)
{
ceph_assert(ceph_mutex_is_locked(monc_lock));
if (active_con) {
auto cur_con = active_con->get_con();
ldout(cct, 10) << "_send_mon_message to mon."
<< monmap.get_name(cur_con->get_peer_addr())
<< " at " << cur_con->get_peer_addr() << dendl;
cur_con->send_message2(std::move(m));
} else {
waiting_for_session.push_back(std::move(m));
}
}
void MonClient::_reopen_session(int rank)
{
ceph_assert(ceph_mutex_is_locked(monc_lock));
ldout(cct, 10) << __func__ << " rank " << rank << dendl;
active_con.reset();
pending_cons.clear();
_start_hunting();
if (rank >= 0) {
_add_conn(rank, global_id);
} else {
_add_conns(global_id);
}
// throw out old queued messages
waiting_for_session.clear();
// throw out version check requests
while (!version_requests.empty()) {
finisher.queue(version_requests.begin()->second->context, -EAGAIN);
delete version_requests.begin()->second;
version_requests.erase(version_requests.begin());
}
for (auto& c : pending_cons) {
c.second.start(monmap.get_epoch(), entity_name);
}
if (sub.reload()) {
_renew_subs();
}
}
MonConnection& MonClient::_add_conn(unsigned rank, uint64_t global_id)
{
auto peer = monmap.get_addrs(rank);
auto conn = messenger->connect_to_mon(peer);
MonConnection mc(cct, conn, global_id, &auth_registry);
auto inserted = pending_cons.insert(std::make_pair(peer, std::move(mc)));
ldout(cct, 10) << "picked mon." << monmap.get_name(rank)
<< " con " << conn
<< " addr " << peer
<< dendl;
return inserted.first->second;
}
void MonClient::_add_conns(uint64_t global_id)
{
// collect the next batch of candidates who are listed right next to the ones
// already tried
auto get_next_batch = [this]() -> std::vector<unsigned> {
std::multimap<uint16_t, unsigned> ranks_by_priority;
boost::copy(
monmap.mon_info | boost::adaptors::filtered(
[this](auto& info) {
auto rank = monmap.get_rank(info.first);
return tried.count(rank) == 0;
}) | boost::adaptors::transformed(
[this](auto& info) {
auto rank = monmap.get_rank(info.first);
return std::make_pair(info.second.priority, rank);
}), std::inserter(ranks_by_priority, end(ranks_by_priority)));
if (ranks_by_priority.empty()) {
return {};
}
// only choose the monitors with lowest priority
auto cands = boost::make_iterator_range(
ranks_by_priority.equal_range(ranks_by_priority.begin()->first));
std::vector<unsigned> ranks;
boost::range::copy(cands | boost::adaptors::map_values,
std::back_inserter(ranks));
return ranks;
};
auto ranks = get_next_batch();
if (ranks.empty()) {
tried.clear(); // start over
ranks = get_next_batch();
}
ceph_assert(!ranks.empty());
if (ranks.size() > 1) {
std::vector<uint16_t> weights;
for (auto i : ranks) {
auto rank_name = monmap.get_name(i);
weights.push_back(monmap.get_weight(rank_name));
}
std::random_device rd;
if (std::accumulate(begin(weights), end(weights), 0u) == 0) {
std::shuffle(begin(ranks), end(ranks), std::mt19937{rd()});
} else {
weighted_shuffle(begin(ranks), end(ranks), begin(weights), end(weights),
std::mt19937{rd()});
}
}
ldout(cct, 10) << __func__ << " ranks=" << ranks << dendl;
unsigned n = cct->_conf->mon_client_hunt_parallel;
if (n == 0 || n > ranks.size()) {
n = ranks.size();
}
for (unsigned i = 0; i < n; i++) {
_add_conn(ranks[i], global_id);
tried.insert(ranks[i]);
}
}
bool MonClient::ms_handle_reset(Connection *con)
{
std::lock_guard lock(monc_lock);
if (con->get_peer_type() != CEPH_ENTITY_TYPE_MON)
return false;
if (con->is_anon()) {
auto p = mon_commands.begin();
while (p != mon_commands.end()) {
auto cmd = p->second;
++p;
if (cmd->target_con == con) {
_send_command(cmd); // may retry or fail
break;
}
}
return true;
}
if (_hunting()) {
if (pending_cons.count(con->get_peer_addrs())) {
ldout(cct, 10) << __func__ << " hunted mon " << con->get_peer_addrs()
<< dendl;
} else {
ldout(cct, 10) << __func__ << " stray mon " << con->get_peer_addrs()
<< dendl;
}
return true;
} else {
if (active_con && con == active_con->get_con()) {
ldout(cct, 10) << __func__ << " current mon " << con->get_peer_addrs()
<< dendl;
_reopen_session();
return false;
} else {
ldout(cct, 10) << "ms_handle_reset stray mon " << con->get_peer_addrs()
<< dendl;
return true;
}
}
}
bool MonClient::_opened() const
{
ceph_assert(ceph_mutex_is_locked(monc_lock));
return active_con || _hunting();
}
bool MonClient::_hunting() const
{
return !pending_cons.empty();
}
void MonClient::_start_hunting()
{
ceph_assert(!_hunting());
// adjust timeouts if necessary
if (!had_a_connection)
return;
reopen_interval_multiplier *= cct->_conf->mon_client_hunt_interval_backoff;
if (reopen_interval_multiplier >
cct->_conf->mon_client_hunt_interval_max_multiple) {
reopen_interval_multiplier =
cct->_conf->mon_client_hunt_interval_max_multiple;
}
}
void MonClient::_finish_hunting(int auth_err)
{
ldout(cct,10) << __func__ << " " << auth_err << dendl;
ceph_assert(ceph_mutex_is_locked(monc_lock));
// the pending conns have been cleaned.
ceph_assert(!_hunting());
if (active_con) {
auto con = active_con->get_con();
ldout(cct, 1) << "found mon."
<< monmap.get_name(con->get_peer_addr())
<< dendl;
} else {
ldout(cct, 1) << "no mon sessions established" << dendl;
}
had_a_connection = true;
_un_backoff();
if (!auth_err) {
last_rotating_renew_sent = utime_t();
while (!waiting_for_session.empty()) {
_send_mon_message(std::move(waiting_for_session.front()));
waiting_for_session.pop_front();
}
_resend_mon_commands();
send_log(true);
if (active_con) {
std::swap(auth, active_con->get_auth());
if (global_id && global_id != active_con->get_global_id()) {
lderr(cct) << __func__ << " global_id changed from " << global_id
<< " to " << active_con->get_global_id() << dendl;
}
global_id = active_con->get_global_id();
}
}
}
void MonClient::tick()
{
ldout(cct, 10) << __func__ << dendl;
utime_t now = ceph_clock_now();
auto reschedule_tick = make_scope_guard([this] {
schedule_tick();
});
_check_auth_tickets();
_check_tell_commands();
if (_hunting()) {
ldout(cct, 1) << "continuing hunt" << dendl;
return _reopen_session();
} else if (active_con) {
// just renew as needed
auto cur_con = active_con->get_con();
if (!cur_con->has_feature(CEPH_FEATURE_MON_STATEFUL_SUB)) {
const bool maybe_renew = sub.need_renew();
ldout(cct, 10) << "renew subs? -- " << (maybe_renew ? "yes" : "no")
<< dendl;
if (maybe_renew) {
_renew_subs();
}
}
if (now > last_keepalive + cct->_conf->mon_client_ping_interval) {
cur_con->send_keepalive();
last_keepalive = now;
if (cct->_conf->mon_client_ping_timeout > 0 &&
cur_con->has_feature(CEPH_FEATURE_MSGR_KEEPALIVE2)) {
utime_t lk = cur_con->get_last_keepalive_ack();
utime_t interval = now - lk;
if (interval > cct->_conf->mon_client_ping_timeout) {
ldout(cct, 1) << "no keepalive since " << lk << " (" << interval
<< " seconds), reconnecting" << dendl;
return _reopen_session();
}
}
_un_backoff();
}
if (now > last_send_log + cct->_conf->mon_client_log_interval) {
send_log();
last_send_log = now;
}
}
}
void MonClient::_un_backoff()
{
// un-backoff our reconnect interval
reopen_interval_multiplier = std::max(
cct->_conf.get_val<double>("mon_client_hunt_interval_min_multiple"),
reopen_interval_multiplier /
cct->_conf.get_val<double>("mon_client_hunt_interval_backoff"));
ldout(cct, 20) << __func__ << " reopen_interval_multipler now "
<< reopen_interval_multiplier << dendl;
}
void MonClient::schedule_tick()
{
auto do_tick = make_lambda_context([this](int) { tick(); });
if (_hunting()) {
const auto hunt_interval = (cct->_conf->mon_client_hunt_interval *
reopen_interval_multiplier);
timer.add_event_after(hunt_interval, do_tick);
} else {
timer.add_event_after(std::min(cct->_conf->mon_client_ping_interval,
cct->_conf->mon_client_log_interval),
do_tick);
}
}
// ---------
void MonClient::_renew_subs()
{
ceph_assert(ceph_mutex_is_locked(monc_lock));
if (!sub.have_new()) {
ldout(cct, 10) << __func__ << " - empty" << dendl;
return;
}
ldout(cct, 10) << __func__ << dendl;
if (!_opened())
_reopen_session();
else {
auto m = ceph::make_message<MMonSubscribe>();
m->what = sub.get_subs();
m->hostname = ceph_get_short_hostname();
_send_mon_message(std::move(m));
sub.renewed();
}
}
void MonClient::handle_subscribe_ack(MMonSubscribeAck *m)
{
sub.acked(m->interval);
m->put();
}
int MonClient::_check_auth_tickets()
{
ceph_assert(ceph_mutex_is_locked(monc_lock));
if (active_con && auth) {
if (auth->need_tickets()) {
ldout(cct, 10) << __func__ << " getting new tickets!" << dendl;