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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
commite6918187568dbd01842d8d1d2c808ce16a894239 (patch)
tree64f88b554b444a49f656b6c656111a145cbbaa28 /src/mon/MonmapMonitor.cc
parentInitial commit. (diff)
downloadceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz
ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/mon/MonmapMonitor.cc')
-rw-r--r--src/mon/MonmapMonitor.cc1464
1 files changed, 1464 insertions, 0 deletions
diff --git a/src/mon/MonmapMonitor.cc b/src/mon/MonmapMonitor.cc
new file mode 100644
index 000000000..d162b8e94
--- /dev/null
+++ b/src/mon/MonmapMonitor.cc
@@ -0,0 +1,1464 @@
+// -*- 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) 2009 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 "MonmapMonitor.h"
+#include "Monitor.h"
+#include "OSDMonitor.h"
+#include "messages/MMonCommand.h"
+#include "messages/MMonJoin.h"
+
+#include "common/ceph_argparse.h"
+#include "common/errno.h"
+#include <sstream>
+#include "common/config.h"
+#include "common/cmdparse.h"
+
+#include "include/ceph_assert.h"
+#include "include/stringify.h"
+
+#define dout_subsys ceph_subsys_mon
+#undef dout_prefix
+#define dout_prefix _prefix(_dout, mon)
+using namespace TOPNSPC::common;
+
+using std::cout;
+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::setfill;
+using std::string;
+using std::stringstream;
+using std::to_string;
+using std::vector;
+using std::unique_ptr;
+
+using ceph::bufferlist;
+using ceph::decode;
+using ceph::encode;
+using ceph::Formatter;
+using ceph::JSONFormatter;
+using ceph::make_message;
+using ceph::mono_clock;
+using ceph::mono_time;
+using ceph::timespan_str;
+static ostream& _prefix(std::ostream *_dout, Monitor &mon) {
+ return *_dout << "mon." << mon.name << "@" << mon.rank
+ << "(" << mon.get_state_name()
+ << ").monmap v" << mon.monmap->epoch << " ";
+}
+
+void MonmapMonitor::create_initial()
+{
+ dout(10) << __func__ << " using current monmap" << dendl;
+ pending_map = *mon.monmap;
+ pending_map.epoch = 1;
+
+ if (g_conf()->mon_debug_no_initial_persistent_features) {
+ derr << __func__ << " mon_debug_no_initial_persistent_features=true"
+ << dendl;
+ } else {
+ // initialize with default persistent features for new clusters
+ pending_map.persistent_features = ceph::features::mon::get_persistent();
+ pending_map.min_mon_release = ceph_release();
+ }
+}
+
+void MonmapMonitor::update_from_paxos(bool *need_bootstrap)
+{
+ version_t version = get_last_committed();
+ if (version <= mon.monmap->get_epoch())
+ return;
+
+ dout(10) << __func__ << " version " << version
+ << ", my v " << mon.monmap->epoch << dendl;
+
+ if (need_bootstrap && version != mon.monmap->get_epoch()) {
+ dout(10) << " signaling that we need a bootstrap" << dendl;
+ *need_bootstrap = true;
+ }
+
+ // read and decode
+ monmap_bl.clear();
+ int ret = get_version(version, monmap_bl);
+ ceph_assert(ret == 0);
+ ceph_assert(monmap_bl.length());
+
+ dout(10) << __func__ << " got " << version << dendl;
+ mon.monmap->decode(monmap_bl);
+
+ if (mon.store->exists("mkfs", "monmap")) {
+ auto t(std::make_shared<MonitorDBStore::Transaction>());
+ t->erase("mkfs", "monmap");
+ mon.store->apply_transaction(t);
+ }
+
+ check_subs();
+
+ // make sure we've recorded min_mon_release
+ string val;
+ if (mon.store->read_meta("min_mon_release", &val) < 0 ||
+ val.size() == 0 ||
+ atoi(val.c_str()) != (int)ceph_release()) {
+ dout(10) << __func__ << " updating min_mon_release meta" << dendl;
+ mon.store->write_meta("min_mon_release",
+ stringify(ceph_release()));
+ }
+
+ mon.notify_new_monmap(true);
+}
+
+void MonmapMonitor::create_pending()
+{
+ pending_map = *mon.monmap;
+ pending_map.epoch++;
+ pending_map.last_changed = ceph_clock_now();
+ pending_map.removed_ranks.clear();
+}
+
+void MonmapMonitor::encode_pending(MonitorDBStore::TransactionRef t)
+{
+ dout(10) << __func__ << " epoch " << pending_map.epoch << dendl;
+
+ ceph_assert(mon.monmap->epoch + 1 == pending_map.epoch ||
+ pending_map.epoch == 1); // special case mkfs!
+ 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);
+
+ // generate a cluster fingerprint, too?
+ if (pending_map.epoch == 1) {
+ mon.prepare_new_fingerprint(t);
+ }
+
+ //health
+ health_check_map_t next;
+ pending_map.check_health(&next);
+ encode_health(next, t);
+}
+
+class C_ApplyFeatures : public Context {
+ MonmapMonitor *svc;
+ mon_feature_t features;
+ ceph_release_t min_mon_release;
+public:
+ C_ApplyFeatures(MonmapMonitor *s, const mon_feature_t& f, ceph_release_t mmr) :
+ svc(s), features(f), min_mon_release(mmr) { }
+ void finish(int r) override {
+ if (r >= 0) {
+ svc->apply_mon_features(features, min_mon_release);
+ } else if (r == -EAGAIN || r == -ECANCELED) {
+ // discard features if we're no longer on the quorum that
+ // established them in the first place.
+ return;
+ } else {
+ ceph_abort_msg("bad C_ApplyFeatures return value");
+ }
+ }
+};
+
+void MonmapMonitor::apply_mon_features(const mon_feature_t& features,
+ ceph_release_t min_mon_release)
+{
+ if (!is_writeable()) {
+ dout(5) << __func__ << " wait for service to be writeable" << dendl;
+ wait_for_writeable_ctx(new C_ApplyFeatures(this, features, min_mon_release));
+ return;
+ }
+
+ // do nothing here unless we have a full quorum
+ if (mon.get_quorum().size() < mon.monmap->size()) {
+ return;
+ }
+
+ ceph_assert(is_writeable());
+ ceph_assert(features.contains_all(pending_map.persistent_features));
+ // we should never hit this because `features` should be the result
+ // of the quorum's supported features. But if it happens, die.
+ ceph_assert(ceph::features::mon::get_supported().contains_all(features));
+
+ mon_feature_t new_features =
+ (pending_map.persistent_features ^
+ (features & ceph::features::mon::get_persistent()));
+
+ if (new_features.empty() &&
+ pending_map.min_mon_release == min_mon_release) {
+ dout(10) << __func__ << " min_mon_release (" << (int)min_mon_release
+ << ") and features (" << features << ") match" << dendl;
+ return;
+ }
+
+ if (!new_features.empty()) {
+ dout(1) << __func__ << " applying new features "
+ << new_features << ", had " << pending_map.persistent_features
+ << ", will have "
+ << (new_features | pending_map.persistent_features)
+ << dendl;
+ pending_map.persistent_features |= new_features;
+ }
+ if (min_mon_release > pending_map.min_mon_release) {
+ dout(1) << __func__ << " increasing min_mon_release to "
+ << to_integer<int>(min_mon_release) << " (" << min_mon_release
+ << ")" << dendl;
+ pending_map.min_mon_release = min_mon_release;
+ }
+
+ propose_pending();
+}
+
+void MonmapMonitor::on_active()
+{
+ if (get_last_committed() >= 1 && !mon.has_ever_joined) {
+ // make note of the fact that i was, once, part of the quorum.
+ dout(10) << "noting that i was, once, part of an active quorum." << dendl;
+
+ /* This is some form of nasty in-breeding we have between the MonmapMonitor
+ and the Monitor itself. We should find a way to get rid of it given our
+ new architecture. Until then, stick with it since we are a
+ single-threaded process and, truth be told, no one else relies on this
+ thing besides us.
+ */
+ auto t(std::make_shared<MonitorDBStore::Transaction>());
+ t->put(Monitor::MONITOR_NAME, "joined", 1);
+ mon.store->apply_transaction(t);
+ mon.has_ever_joined = true;
+ }
+
+ if (mon.is_leader()) {
+ mon.clog->debug() << "monmap " << *mon.monmap;
+ }
+
+ apply_mon_features(mon.get_quorum_mon_features(),
+ mon.quorum_min_mon_release);
+
+ mon.update_pending_metadata();
+}
+
+bool MonmapMonitor::preprocess_query(MonOpRequestRef op)
+{
+ auto m = op->get_req<PaxosServiceMessage>();
+ switch (m->get_type()) {
+ // READs
+ 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;
+ }
+ case MSG_MON_JOIN:
+ return preprocess_join(op);
+ default:
+ ceph_abort();
+ return true;
+ }
+}
+
+void MonmapMonitor::dump_info(Formatter *f)
+{
+ f->dump_unsigned("monmap_first_committed", get_first_committed());
+ f->dump_unsigned("monmap_last_committed", get_last_committed());
+ f->open_object_section("monmap");
+ mon.monmap->dump(f);
+ f->close_section();
+ f->open_array_section("quorum");
+ for (set<int>::iterator q = mon.get_quorum().begin(); q != mon.get_quorum().end(); ++q)
+ f->dump_int("mon", *q);
+ f->close_section();
+}
+
+bool MonmapMonitor::preprocess_command(MonOpRequestRef op)
+{
+ auto m = op->get_req<MMonCommand>();
+ int r = -1;
+ bufferlist rdata;
+ stringstream ss;
+
+ 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;
+ }
+
+ string prefix;
+ cmd_getval(cmdmap, "prefix", prefix);
+
+ MonSession *session = op->get_session();
+ if (!session) {
+ mon.reply_command(op, -EACCES, "access denied", get_last_committed());
+ return true;
+ }
+
+ string format = cmd_getval_or<string>(cmdmap, "format", "plain");
+ boost::scoped_ptr<Formatter> f(Formatter::create(format));
+
+ if (prefix == "mon stat") {
+ if (f) {
+ f->open_object_section("monmap");
+ mon.monmap->dump_summary(f.get());
+ f->dump_string("leader", mon.get_leader_name());
+ f->open_array_section("quorum");
+ for (auto rank: mon.get_quorum()) {
+ std::string name = mon.monmap->get_name(rank);
+ f->open_object_section("mon");
+ f->dump_int("rank", rank);
+ f->dump_string("name", name);
+ f->close_section(); // mon
+ }
+ f->close_section(); // quorum
+ f->close_section(); // monmap
+ f->flush(ss);
+ } else {
+ mon.monmap->print_summary(ss);
+ ss << ", election epoch " << mon.get_epoch() << ", leader "
+ << mon.get_leader() << " " << mon.get_leader_name()
+ << ", quorum " << mon.get_quorum()
+ << " " << mon.get_quorum_names();
+ }
+
+ rdata.append(ss);
+ ss.str("");
+ r = 0;
+
+ } else if (prefix == "mon getmap" ||
+ prefix == "mon dump") {
+
+ epoch_t epoch;
+ int64_t epochnum = cmd_getval_or<int64_t>(cmdmap, "epoch", 0);
+ epoch = epochnum;
+
+ MonMap *p = mon.monmap;
+ if (epoch) {
+ bufferlist bl;
+ r = get_version(epoch, bl);
+ if (r == -ENOENT) {
+ ss << "there is no map for epoch " << epoch;
+ goto reply;
+ }
+ ceph_assert(r == 0);
+ ceph_assert(bl.length() > 0);
+ p = new MonMap;
+ p->decode(bl);
+ }
+
+ ceph_assert(p);
+
+ if (prefix == "mon getmap") {
+ p->encode(rdata, m->get_connection()->get_features());
+ r = 0;
+ ss << "got monmap epoch " << p->get_epoch();
+ } else if (prefix == "mon dump") {
+ stringstream ds;
+ if (f) {
+ f->open_object_section("monmap");
+ p->dump(f.get());
+ f->open_array_section("quorum");
+ for (set<int>::iterator q = mon.get_quorum().begin();
+ q != mon.get_quorum().end(); ++q) {
+ f->dump_int("mon", *q);
+ }
+ f->close_section();
+ f->close_section();
+ f->flush(ds);
+ r = 0;
+ } else {
+ p->print(ds);
+ r = 0;
+ }
+ rdata.append(ds);
+ ss << "dumped monmap epoch " << p->get_epoch();
+ }
+ if (p != mon.monmap) {
+ delete p;
+ p = nullptr;
+ }
+
+ } else if (prefix == "mon feature ls") {
+
+ bool list_with_value = false;
+ cmd_getval_compat_cephbool(cmdmap, "with_value", list_with_value);
+
+ MonMap *p = mon.monmap;
+
+ // list features
+ mon_feature_t supported = ceph::features::mon::get_supported();
+ mon_feature_t persistent = ceph::features::mon::get_persistent();
+ mon_feature_t required = p->get_required_features();
+
+ stringstream ds;
+ auto print_feature = [&](mon_feature_t& m_features, const char* m_str) {
+ if (f) {
+ if (list_with_value)
+ m_features.dump_with_value(f.get(), m_str);
+ else
+ m_features.dump(f.get(), m_str);
+ } else {
+ if (list_with_value)
+ m_features.print_with_value(ds);
+ else
+ m_features.print(ds);
+ }
+ };
+
+ if (f) {
+ f->open_object_section("features");
+
+ f->open_object_section("all");
+ print_feature(supported, "supported");
+ print_feature(persistent, "persistent");
+ f->close_section(); // all
+
+ f->open_object_section("monmap");
+ print_feature(p->persistent_features, "persistent");
+ print_feature(p->optional_features, "optional");
+ print_feature(required, "required");
+ f->close_section(); // monmap
+
+ f->close_section(); // features
+ f->flush(ds);
+
+ } else {
+ ds << "all features" << std::endl
+ << "\tsupported: ";
+ print_feature(supported, nullptr);
+ ds << std::endl
+ << "\tpersistent: ";
+ print_feature(persistent, nullptr);
+ ds << std::endl
+ << std::endl;
+
+ ds << "on current monmap (epoch "
+ << p->get_epoch() << ")" << std::endl
+ << "\tpersistent: ";
+ print_feature(p->persistent_features, nullptr);
+ ds << std::endl
+ // omit optional features in plain-text
+ // makes it easier to read, and they're, currently, empty.
+ << "\trequired: ";
+ print_feature(required, nullptr);
+ ds << std::endl;
+ }
+ rdata.append(ds);
+ r = 0;
+ }
+
+reply:
+ if (r != -1) {
+ string rs;
+ getline(ss, rs);
+
+ mon.reply_command(op, r, rs, rdata, get_last_committed());
+ return true;
+ } else
+ return false;
+}
+
+
+bool MonmapMonitor::prepare_update(MonOpRequestRef op)
+{
+ auto m = op->get_req<PaxosServiceMessage>();
+ dout(7) << __func__ << " " << *m << " from " << m->get_orig_source_inst() << dendl;
+
+ switch (m->get_type()) {
+ 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;
+ }
+ case MSG_MON_JOIN:
+ return prepare_join(op);
+ default:
+ ceph_abort();
+ }
+
+ return false;
+}
+
+bool MonmapMonitor::prepare_command(MonOpRequestRef op)
+{
+ auto m = op->get_req<MMonCommand>();
+ stringstream ss;
+ string rs;
+ int err = -EINVAL;
+
+ cmdmap_t cmdmap;
+ if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) {
+ string rs = ss.str();
+ mon.reply_command(op, -EINVAL, rs, get_last_committed());
+ return true;
+ }
+
+ string prefix;
+ cmd_getval(cmdmap, "prefix", prefix);
+
+ MonSession *session = op->get_session();
+ if (!session) {
+ mon.reply_command(op, -EACCES, "access denied", get_last_committed());
+ return true;
+ }
+
+ /* We should follow the following rules:
+ *
+ * - 'monmap' is the current, consistent version of the monmap
+ * - 'pending_map' is the uncommitted version of the monmap
+ *
+ * All checks for the current state must be made against 'monmap'.
+ * All changes are made against 'pending_map'.
+ *
+ * If there are concurrent operations modifying 'pending_map', please
+ * follow the following rules.
+ *
+ * - if pending_map has already been changed, the second operation must
+ * wait for the proposal to finish and be run again; This is the easiest
+ * path to guarantee correctness but may impact performance (i.e., it
+ * will take longer for the user to get a reply).
+ *
+ * - if the result of the second operation can be guaranteed to be
+ * idempotent, the operation may reply to the user once the proposal
+ * finishes; still needs to wait for the proposal to finish.
+ *
+ * - An operation _NEVER_ returns to the user based on pending state.
+ *
+ * If an operation does not modify current stable monmap, it may be
+ * serialized before current pending map, regardless of any change that
+ * has been made to the pending map -- remember, pending is uncommitted
+ * state, thus we are not bound by it.
+ */
+
+ ceph_assert(mon.monmap);
+ MonMap &monmap = *mon.monmap;
+
+
+ /* Please note:
+ *
+ * Adding or removing monitors may lead to loss of quorum.
+ *
+ * Because quorum may be lost, it's important to reply something
+ * to the user, lest she end up waiting forever for a reply. And
+ * no reply will ever be sent until quorum is formed again.
+ *
+ * On the other hand, this means we're leaking uncommitted state
+ * to the user. As such, please be mindful of the reply message.
+ *
+ * e.g., 'adding monitor mon.foo' is okay ('adding' is an on-going
+ * operation and conveys its not-yet-permanent nature); whereas
+ * 'added monitor mon.foo' presumes the action has successfully
+ * completed and state has been committed, which may not be true.
+ */
+
+
+ bool propose = false;
+ if (prefix == "mon add") {
+ string name;
+ cmd_getval(cmdmap, "name", name);
+ string addrstr;
+ cmd_getval(cmdmap, "addr", addrstr);
+ entity_addr_t addr;
+ bufferlist rdata;
+
+ if (!addr.parse(addrstr)) {
+ err = -EINVAL;
+ ss << "addr " << addrstr << "does not parse";
+ goto reply;
+ }
+
+ vector<string> locationvec;
+ map<string, string> loc;
+ cmd_getval(cmdmap, "location", locationvec);
+ CrushWrapper::parse_loc_map(locationvec, &loc);
+ if (locationvec.size() &&
+ !mon.get_quorum_mon_features().contains_all(
+ ceph::features::mon::FEATURE_PINGING)) {
+ err = -ENOTSUP;
+ ss << "Not all monitors support adding monitors with a location; please upgrade first!";
+ goto reply;
+ }
+ if (locationvec.size() && !loc.size()) {
+ ss << "We could not parse your input location to anything real; " << locationvec
+ << " turned into an empty map!";
+ err = -EINVAL;
+ goto reply;
+ }
+
+ dout(10) << "mon add setting location for " << name << " to " << loc << dendl;
+
+ // TODO: validate location in crush map
+ if (monmap.stretch_mode_enabled && !loc.size()) {
+ ss << "We are in stretch mode and new monitors must have a location, but "
+ << "could not parse your input location to anything real; " << locationvec
+ << " turned into an empty map!";
+ err = -EINVAL;
+ goto reply;
+ }
+ // TODO: validate location against any existing stretch config
+
+ entity_addrvec_t addrs;
+ if (monmap.persistent_features.contains_all(
+ ceph::features::mon::FEATURE_NAUTILUS)) {
+ if (addr.get_port() == CEPH_MON_PORT_IANA) {
+ addr.set_type(entity_addr_t::TYPE_MSGR2);
+ }
+ if (addr.get_port() == CEPH_MON_PORT_LEGACY) {
+ // if they specified the *old* default they probably don't care
+ addr.set_port(0);
+ }
+ if (addr.get_port()) {
+ addrs.v.push_back(addr);
+ } else {
+ addr.set_type(entity_addr_t::TYPE_MSGR2);
+ addr.set_port(CEPH_MON_PORT_IANA);
+ addrs.v.push_back(addr);
+ addr.set_type(entity_addr_t::TYPE_LEGACY);
+ addr.set_port(CEPH_MON_PORT_LEGACY);
+ addrs.v.push_back(addr);
+ }
+ } else {
+ if (addr.get_port() == 0) {
+ addr.set_port(CEPH_MON_PORT_LEGACY);
+ }
+ addr.set_type(entity_addr_t::TYPE_LEGACY);
+ addrs.v.push_back(addr);
+ }
+ dout(20) << __func__ << " addr " << addr << " -> addrs " << addrs << dendl;
+
+ /**
+ * If we have a monitor with the same name and different addr, then EEXIST
+ * If we have a monitor with the same addr and different name, then EEXIST
+ * If we have a monitor with the same addr and same name, then wait for
+ * the proposal to finish and return success.
+ * If we don't have the monitor, add it.
+ */
+
+ err = 0;
+ if (!ss.str().empty())
+ ss << "; ";
+
+ do {
+ if (monmap.contains(name)) {
+ if (monmap.get_addrs(name) == addrs) {
+ // stable map contains monitor with the same name at the same address.
+ // serialize before current pending map.
+ err = 0; // for clarity; this has already been set above.
+ ss << "mon." << name << " at " << addrs << " already exists";
+ goto reply;
+ } else {
+ ss << "mon." << name
+ << " already exists at address " << monmap.get_addrs(name);
+ }
+ } else if (monmap.contains(addrs)) {
+ // we established on the previous branch that name is different
+ ss << "mon." << monmap.get_name(addrs)
+ << " already exists at address " << addr;
+ } else {
+ // go ahead and add
+ break;
+ }
+ err = -EEXIST;
+ goto reply;
+ } while (false);
+
+ if (pending_map.stretch_mode_enabled) {
+
+ }
+
+ /* Given there's no delay between proposals on the MonmapMonitor (see
+ * MonmapMonitor::should_propose()), there is no point in checking for
+ * a mismatch between name and addr on pending_map.
+ *
+ * Once we established the monitor does not exist in the committed state,
+ * we can simply go ahead and add the monitor.
+ */
+
+ pending_map.add(name, addrs);
+ pending_map.mon_info[name].crush_loc = loc;
+ pending_map.last_changed = ceph_clock_now();
+ ss << "adding mon." << name << " at " << addrs;
+ propose = true;
+ dout(0) << __func__ << " proposing new mon." << name << dendl;
+
+ } else if (prefix == "mon remove" ||
+ prefix == "mon rm") {
+ string name;
+ cmd_getval(cmdmap, "name", name);
+ if (!monmap.contains(name)) {
+ err = 0;
+ ss << "mon." << name << " does not exist or has already been removed";
+ goto reply;
+ }
+
+ if (monmap.size() == 1) {
+ err = -EINVAL;
+ ss << "error: refusing removal of last monitor " << name;
+ goto reply;
+ }
+
+ if (pending_map.stretch_mode_enabled &&
+ name == pending_map.tiebreaker_mon) {
+ err = -EINVAL;
+ ss << "you cannot remove stretch mode's tiebreaker monitor";
+ goto reply;
+ }
+ /* At the time of writing, there is no risk of races when multiple clients
+ * attempt to use the same name. The reason is simple but may not be
+ * obvious.
+ *
+ * In a nutshell, we do not collate proposals on the MonmapMonitor. As
+ * soon as we return 'true' below, PaxosService::dispatch() will check if
+ * the service should propose, and - if so - the service will be marked as
+ * 'proposing' and a proposal will be triggered. The PaxosService class
+ * guarantees that once a service is marked 'proposing' no further writes
+ * will be handled.
+ *
+ * The decision on whether the service should propose or not is, in this
+ * case, made by MonmapMonitor::should_propose(), which always considers
+ * the proposal delay being 0.0 seconds. This is key for PaxosService to
+ * trigger the proposal immediately.
+ * 0.0 seconds of delay.
+ *
+ * From the above, there's no point in performing further checks on the
+ * pending_map, as we don't ever have multiple proposals in-flight in
+ * this service. As we've established the committed state contains the
+ * monitor, we can simply go ahead and remove it.
+ *
+ * Please note that the code hinges on all of the above to be true. It
+ * has been true since time immemorial and we don't see a good reason
+ * to make it sturdier at this time - mainly because we don't think it's
+ * going to change any time soon, lest for any bug that may be unwillingly
+ * introduced.
+ */
+
+ entity_addrvec_t addrs = pending_map.get_addrs(name);
+ pending_map.remove(name);
+ pending_map.disallowed_leaders.erase(name);
+ pending_map.last_changed = ceph_clock_now();
+ propose = true;
+ err = 0;
+
+ } else if (prefix == "mon feature set") {
+
+ /* PLEASE NOTE:
+ *
+ * We currently only support setting/unsetting persistent features.
+ * This is by design, given at the moment we still don't have optional
+ * features, and, as such, there is no point introducing an interface
+ * to manipulate them. This allows us to provide a cleaner, more
+ * intuitive interface to the user, modifying solely persistent
+ * features.
+ *
+ * In the future we should consider adding another interface to handle
+ * optional features/flags; e.g., 'mon feature flag set/unset', or
+ * 'mon flag set/unset'.
+ */
+ string feature_name;
+ if (!cmd_getval(cmdmap, "feature_name", feature_name)) {
+ ss << "missing required feature name";
+ err = -EINVAL;
+ goto reply;
+ }
+
+ mon_feature_t feature;
+ feature = ceph::features::mon::get_feature_by_name(feature_name);
+ if (feature == ceph::features::mon::FEATURE_NONE) {
+ ss << "unknown feature '" << feature_name << "'";
+ err = -ENOENT;
+ goto reply;
+ }
+
+ bool sure = false;
+ cmd_getval(cmdmap, "yes_i_really_mean_it", sure);
+ if (!sure) {
+ ss << "please specify '--yes-i-really-mean-it' if you "
+ << "really, **really** want to set feature '"
+ << feature << "' in the monmap.";
+ err = -EPERM;
+ goto reply;
+ }
+
+ if (!mon.get_quorum_mon_features().contains_all(feature)) {
+ ss << "current quorum does not support feature '" << feature
+ << "'; supported features: "
+ << mon.get_quorum_mon_features();
+ err = -EINVAL;
+ goto reply;
+ }
+
+ ss << "setting feature '" << feature << "'";
+
+ err = 0;
+ if (monmap.persistent_features.contains_all(feature)) {
+ dout(10) << __func__ << " feature '" << feature
+ << "' already set on monmap; no-op." << dendl;
+ goto reply;
+ }
+
+ pending_map.persistent_features.set_feature(feature);
+ pending_map.last_changed = ceph_clock_now();
+ propose = true;
+
+ dout(1) << __func__ << " " << ss.str() << "; new features will be: "
+ << "persistent = " << pending_map.persistent_features
+ // output optional nevertheless, for auditing purposes.
+ << ", optional = " << pending_map.optional_features << dendl;
+
+ } else if (prefix == "mon set-rank") {
+ string name;
+ int64_t rank;
+ if (!cmd_getval(cmdmap, "name", name) ||
+ !cmd_getval(cmdmap, "rank", rank)) {
+ err = -EINVAL;
+ goto reply;
+ }
+ int oldrank = pending_map.get_rank(name);
+ if (oldrank < 0) {
+ ss << "mon." << name << " does not exist in monmap";
+ err = -ENOENT;
+ goto reply;
+ }
+ err = 0;
+ pending_map.set_rank(name, rank);
+ pending_map.last_changed = ceph_clock_now();
+ propose = true;
+ } else if (prefix == "mon set-addrs") {
+ string name;
+ string addrs;
+ if (!cmd_getval(cmdmap, "name", name) ||
+ !cmd_getval(cmdmap, "addrs", addrs)) {
+ err = -EINVAL;
+ goto reply;
+ }
+ if (!pending_map.contains(name)) {
+ ss << "mon." << name << " does not exist";
+ err = -ENOENT;
+ goto reply;
+ }
+ entity_addrvec_t av;
+ if (!av.parse(addrs.c_str(), nullptr)) {
+ ss << "failed to parse addrs '" << addrs << "'";
+ err = -EINVAL;
+ goto reply;
+ }
+ for (auto& a : av.v) {
+ a.set_nonce(0);
+ if (!a.get_port()) {
+ ss << "monitor must bind to a non-zero port, not " << a;
+ err = -EINVAL;
+ goto reply;
+ }
+ }
+ err = 0;
+ pending_map.set_addrvec(name, av);
+ pending_map.last_changed = ceph_clock_now();
+ propose = true;
+ } else if (prefix == "mon set-weight") {
+ string name;
+ int64_t weight;
+ if (!cmd_getval(cmdmap, "name", name) ||
+ !cmd_getval(cmdmap, "weight", weight)) {
+ err = -EINVAL;
+ goto reply;
+ }
+ if (!pending_map.contains(name)) {
+ ss << "mon." << name << " does not exist";
+ err = -ENOENT;
+ goto reply;
+ }
+ err = 0;
+ pending_map.set_weight(name, weight);
+ pending_map.last_changed = ceph_clock_now();
+ propose = true;
+ } else if (prefix == "mon enable-msgr2") {
+ if (!monmap.get_required_features().contains_all(
+ ceph::features::mon::FEATURE_NAUTILUS)) {
+ err = -EACCES;
+ ss << "all monitors must be running nautilus to enable v2";
+ goto reply;
+ }
+ for (auto& i : pending_map.mon_info) {
+ if (i.second.public_addrs.v.size() == 1 &&
+ i.second.public_addrs.front().is_legacy() &&
+ i.second.public_addrs.front().get_port() == CEPH_MON_PORT_LEGACY) {
+ entity_addrvec_t av;
+ entity_addr_t a = i.second.public_addrs.front();
+ a.set_type(entity_addr_t::TYPE_MSGR2);
+ a.set_port(CEPH_MON_PORT_IANA);
+ av.v.push_back(a);
+ av.v.push_back(i.second.public_addrs.front());
+ dout(10) << " setting mon." << i.first
+ << " addrs " << i.second.public_addrs
+ << " -> " << av << dendl;
+ pending_map.set_addrvec(i.first, av);
+ propose = true;
+ pending_map.last_changed = ceph_clock_now();
+ }
+ }
+ err = 0;
+ } else if (prefix == "mon set election_strategy") {
+ if (!mon.get_quorum_mon_features().contains_all(
+ ceph::features::mon::FEATURE_PINGING)) {
+ err = -ENOTSUP;
+ ss << "Not all monitors support changing election strategies; please upgrade first!";
+ goto reply;
+ }
+ string strat;
+ MonMap::election_strategy strategy;
+ if (!cmd_getval(cmdmap, "strategy", strat)) {
+ err = -EINVAL;
+ goto reply;
+ }
+ if (strat == "classic") {
+ strategy = MonMap::CLASSIC;
+ } else if (strat == "disallow") {
+ strategy = MonMap::DISALLOW;
+ } else if (strat == "connectivity") {
+ strategy = MonMap::CONNECTIVITY;
+ } else {
+ err = -EINVAL;
+ goto reply;
+ }
+ err = 0;
+ pending_map.strategy = strategy;
+ pending_map.last_changed = ceph_clock_now();
+ propose = true;
+ } else if (prefix == "mon add disallowed_leader") {
+ if (!mon.get_quorum_mon_features().contains_all(
+ ceph::features::mon::FEATURE_PINGING)) {
+ err = -ENOTSUP;
+ ss << "Not all monitors support changing election strategies; please upgrade first!";
+ goto reply;
+ }
+ string name;
+ if (!cmd_getval(cmdmap, "name", name)) {
+ err = -EINVAL;
+ goto reply;
+ }
+ if (pending_map.strategy != MonMap::DISALLOW &&
+ pending_map.strategy != MonMap::CONNECTIVITY) {
+ ss << "You cannot disallow monitors in your current election mode";
+ err = -EINVAL;
+ goto reply;
+ }
+ if (!pending_map.contains(name)) {
+ ss << "mon." << name << " does not exist";
+ err = -ENOENT;
+ goto reply;
+ }
+ if (pending_map.disallowed_leaders.count(name)) {
+ ss << "mon." << name << " is already disallowed";
+ err = 0;
+ goto reply;
+ }
+ if (pending_map.disallowed_leaders.size() == pending_map.size() - 1) {
+ ss << "mon." << name << " is the only remaining allowed leader!";
+ err = -EINVAL;
+ goto reply;
+ }
+ pending_map.disallowed_leaders.insert(name);
+ pending_map.last_changed = ceph_clock_now();
+ err = 0;
+ propose = true;
+ } else if (prefix == "mon rm disallowed_leader") {
+ if (!mon.get_quorum_mon_features().contains_all(
+ ceph::features::mon::FEATURE_PINGING)) {
+ err = -ENOTSUP;
+ ss << "Not all monitors support changing election strategies; please upgrade first!";
+ goto reply;
+ }
+ string name;
+ if (!cmd_getval(cmdmap, "name", name)) {
+ err = -EINVAL;
+ goto reply;
+ }
+ if (pending_map.strategy != MonMap::DISALLOW &&
+ pending_map.strategy != MonMap::CONNECTIVITY) {
+ ss << "You cannot disallow monitors in your current election mode";
+ err = -EINVAL;
+ goto reply;
+ }
+ if (!pending_map.contains(name)) {
+ ss << "mon." << name << " does not exist";
+ err = -ENOENT;
+ goto reply;
+ }
+ if (!pending_map.disallowed_leaders.count(name)) {
+ ss << "mon." << name << " is already allowed";
+ err = 0;
+ goto reply;
+ }
+ pending_map.disallowed_leaders.erase(name);
+ pending_map.last_changed = ceph_clock_now();
+ err = 0;
+ propose = true;
+ } else if (prefix == "mon set_location") {
+ if (!mon.get_quorum_mon_features().contains_all(
+ ceph::features::mon::FEATURE_PINGING)) {
+ err = -ENOTSUP;
+ ss << "Not all monitors support monitor locations; please upgrade first!";
+ goto reply;
+ }
+ string name;
+ if (!cmd_getval(cmdmap, "name", name)) {
+ err = -EINVAL;
+ goto reply;
+ }
+ if (!pending_map.contains(name)) {
+ ss << "mon." << name << " does not exist";
+ err = -ENOENT;
+ goto reply;
+ }
+
+ vector<string> argvec;
+ map<string, string> loc;
+ cmd_getval(cmdmap, "args", argvec);
+ CrushWrapper::parse_loc_map(argvec, &loc);
+
+ dout(10) << "mon set_location for " << name << " to " << loc << dendl;
+
+ // TODO: validate location in crush map
+ if (!loc.size()) {
+ ss << "We could not parse your input location to anything real; " << argvec
+ << " turned into an empty map!";
+ err = -EINVAL;
+ goto reply;
+ }
+ // TODO: validate location against any existing stretch config
+ pending_map.mon_info[name].crush_loc = loc;
+ pending_map.last_changed = ceph_clock_now();
+ err = 0;
+ propose = true;
+ } else if (prefix == "mon set_new_tiebreaker") {
+ if (!pending_map.stretch_mode_enabled) {
+ err = -EINVAL;
+ ss << "Stretch mode is not enabled, so there is no tiebreaker";
+ goto reply;
+ }
+ string name;
+ if (!cmd_getval(cmdmap, "name", name)) {
+ err = -EINVAL;
+ goto reply;
+ }
+ bool sure = false;
+ cmd_getval(cmdmap, "yes_i_really_mean_it", sure);
+
+ const auto &existing_tiebreaker_info_i = pending_map.mon_info.find(pending_map.tiebreaker_mon);
+ const auto &new_tiebreaker_info_i = pending_map.mon_info.find(name);
+ if (new_tiebreaker_info_i == pending_map.mon_info.end()) {
+ ss << "mon." << name << " does not exist";
+ err = -ENOENT;
+ goto reply;
+ }
+ const auto& new_info = new_tiebreaker_info_i->second;
+ if (new_info.crush_loc.empty()) {
+ ss << "mon." << name << " does not have a location specified";
+ err = -EINVAL;
+ goto reply;
+ }
+
+ if (!mon.osdmon()->is_readable()) {
+ dout(10) << __func__
+ << ": waiting for osdmon readable to inspect crush barrier"
+ << dendl;
+ mon.osdmon()->wait_for_readable(op, new Monitor::C_RetryMessage(&mon, op));
+ return false;
+ }
+ int32_t stretch_divider_id = mon.osdmon()->osdmap.stretch_mode_bucket;
+ string stretch_bucket_divider = mon.osdmon()->osdmap.crush->
+ get_type_name(stretch_divider_id);
+
+ const auto& new_loc_i = new_info.crush_loc.find(stretch_bucket_divider);
+ if (new_loc_i == new_info.crush_loc.end()) {
+ ss << "mon." << name << " has a specificed location, but not a "
+ << stretch_bucket_divider << ", which is the stretch divider";
+ err = -EINVAL;
+ goto reply;
+ }
+ const string& new_loc = new_loc_i->second;
+ set<string> matching_mons;
+ for (const auto& mii : pending_map.mon_info) {
+ const auto& other_loc_i = mii.second.crush_loc.find(stretch_bucket_divider);
+ if (mii.first == name) {
+ continue;
+ }
+ if (other_loc_i == mii.second.crush_loc.end()) { // huh
+ continue;
+ }
+ const string& other_loc = other_loc_i->second;
+ if (other_loc == new_loc &&
+ mii.first != existing_tiebreaker_info_i->first) {
+ matching_mons.insert(mii.first);
+ }
+ }
+ if (!matching_mons.empty()) {
+ ss << "mon." << name << " has location " << new_loc_i->second
+ << ", which matches mons " << matching_mons << " on the "
+ << stretch_bucket_divider << " dividing bucket for stretch mode. "
+ "Pass --yes-i-really-mean-it if you're sure you want to do this."
+ "(You really don't.)";
+ err = -EINVAL;
+ goto reply;
+ }
+ pending_map.tiebreaker_mon = name;
+ pending_map.disallowed_leaders.insert(name);
+ pending_map.last_changed = ceph_clock_now();
+ err = 0;
+ propose = true;
+ } else if (prefix == "mon enable_stretch_mode") {
+ if (!mon.osdmon()->is_writeable()) {
+ dout(10) << __func__
+ << ": waiting for osdmon writeable for stretch mode" << dendl;
+ mon.osdmon()->wait_for_writeable(op, new Monitor::C_RetryMessage(&mon, op));
+ return false;
+ }
+ {
+ if (monmap.stretch_mode_enabled) {
+ ss << "stretch mode is already engaged";
+ err = -EINVAL;
+ goto reply;
+ }
+ if (pending_map.stretch_mode_enabled) {
+ ss << "stretch mode currently committing";
+ err = 0;
+ goto reply;
+ }
+ string tiebreaker_mon;
+ if (!cmd_getval(cmdmap, "tiebreaker_mon", tiebreaker_mon)) {
+ ss << "must specify a tiebreaker monitor";
+ err = -EINVAL;
+ goto reply;
+ }
+ string new_crush_rule;
+ if (!cmd_getval(cmdmap, "new_crush_rule", new_crush_rule)) {
+ ss << "must specify a new crush rule that spreads out copies over multiple sites";
+ err = -EINVAL;
+ goto reply;
+ }
+ string dividing_bucket;
+ if (!cmd_getval(cmdmap, "dividing_bucket", dividing_bucket)) {
+ ss << "must specify a dividing bucket";
+ err = -EINVAL;
+ goto reply;
+ }
+ //okay, initial arguments make sense, check pools and cluster state
+ err = mon.osdmon()->check_cluster_features(CEPH_FEATUREMASK_STRETCH_MODE, ss);
+ if (err)
+ goto reply;
+ struct Plugger {
+ Paxos &p;
+ Plugger(Paxos &p) : p(p) { p.plug(); }
+ ~Plugger() { p.unplug(); }
+ } plugger(paxos);
+
+ set<pg_pool_t*> pools;
+ bool okay = false;
+ int errcode = 0;
+
+ mon.osdmon()->try_enable_stretch_mode_pools(ss, &okay, &errcode,
+ &pools, new_crush_rule);
+ if (!okay) {
+ err = errcode;
+ goto reply;
+ }
+ try_enable_stretch_mode(ss, &okay, &errcode, false,
+ tiebreaker_mon, dividing_bucket);
+ if (!okay) {
+ err = errcode;
+ goto reply;
+ }
+ mon.osdmon()->try_enable_stretch_mode(ss, &okay, &errcode, false,
+ dividing_bucket, 2, pools, new_crush_rule);
+ if (!okay) {
+ err = errcode;
+ goto reply;
+ }
+ // everything looks good, actually commit the changes!
+ try_enable_stretch_mode(ss, &okay, &errcode, true,
+ tiebreaker_mon, dividing_bucket);
+ mon.osdmon()->try_enable_stretch_mode(ss, &okay, &errcode, true,
+ dividing_bucket,
+ 2, // right now we only support 2 sites
+ pools, new_crush_rule);
+ ceph_assert(okay == true);
+ }
+ request_proposal(mon.osdmon());
+ err = 0;
+ propose = true;
+ } else {
+ ss << "unknown command " << prefix;
+ err = -EINVAL;
+ }
+
+reply:
+ getline(ss, rs);
+ mon.reply_command(op, err, rs, get_last_committed());
+ // we are returning to the user; do not propose.
+ return propose;
+}
+
+void MonmapMonitor::try_enable_stretch_mode(stringstream& ss, bool *okay,
+ int *errcode, bool commit,
+ const string& tiebreaker_mon,
+ const string& dividing_bucket)
+{
+ dout(20) << __func__ << dendl;
+ *okay = false;
+ if (pending_map.strategy != MonMap::CONNECTIVITY) {
+ ss << "Monitors must use the connectivity strategy to enable stretch mode";
+ *errcode = -EINVAL;
+ ceph_assert(!commit);
+ return;
+ }
+ if (!pending_map.contains(tiebreaker_mon)) {
+ ss << "mon " << tiebreaker_mon << "does not seem to exist";
+ *errcode = -ENOENT;
+ ceph_assert(!commit);
+ return;
+ }
+ map<string,string> buckets;
+ for (const auto&mii : mon.monmap->mon_info) {
+ const auto& mi = mii.second;
+ const auto& bi = mi.crush_loc.find(dividing_bucket);
+ if (bi == mi.crush_loc.end()) {
+ ss << "Could not find location entry for " << dividing_bucket
+ << " on monitor " << mi.name;
+ *errcode = -EINVAL;
+ ceph_assert(!commit);
+ return;
+ }
+ buckets[mii.first] = bi->second;
+ }
+ string bucket1, bucket2, tiebreaker_bucket;
+ for (auto& i : buckets) {
+ if (i.first == tiebreaker_mon) {
+ tiebreaker_bucket = i.second;
+ continue;
+ }
+ if (bucket1.empty()) {
+ bucket1 = i.second;
+ }
+ if (bucket1 != i.second &&
+ bucket2.empty()) {
+ bucket2 = i.second;
+ }
+ if (bucket1 != i.second &&
+ bucket2 != i.second) {
+ ss << "There are too many monitor buckets for stretch mode, found "
+ << bucket1 << "," << bucket2 << "," << i.second;
+ *errcode = -EINVAL;
+ ceph_assert(!commit);
+ return;
+ }
+ }
+ if (bucket1.empty() || bucket2.empty()) {
+ ss << "There are not enough monitor buckets for stretch mode;"
+ << " must have at least 2 plus the tiebreaker but only found "
+ << (bucket1.empty() ? bucket1 : bucket2);
+ *errcode = -EINVAL;
+ ceph_assert(!commit);
+ return;
+ }
+ if (tiebreaker_bucket == bucket1 ||
+ tiebreaker_bucket == bucket2) {
+ ss << "The named tiebreaker monitor " << tiebreaker_mon
+ << " is in the same CRUSH bucket " << tiebreaker_bucket
+ << " as other monitors";
+ *errcode = -EINVAL;
+ ceph_assert(!commit);
+ return;
+ }
+ if (commit) {
+ pending_map.disallowed_leaders.insert(tiebreaker_mon);
+ pending_map.tiebreaker_mon = tiebreaker_mon;
+ pending_map.stretch_mode_enabled = true;
+ }
+ *okay = true;
+}
+
+void MonmapMonitor::trigger_degraded_stretch_mode(const set<string>& dead_mons)
+{
+ dout(20) << __func__ << dendl;
+ pending_map.stretch_marked_down_mons.insert(dead_mons.begin(), dead_mons.end());
+ propose_pending();
+}
+
+void MonmapMonitor::trigger_healthy_stretch_mode()
+{
+ dout(20) << __func__ << dendl;
+ pending_map.stretch_marked_down_mons.clear();
+ propose_pending();
+}
+
+bool MonmapMonitor::preprocess_join(MonOpRequestRef op)
+{
+ auto join = op->get_req<MMonJoin>();
+ dout(10) << __func__ << " " << join->name << " at " << join->addrs << dendl;
+
+ MonSession *session = op->get_session();
+ if (!session ||
+ !session->is_capable("mon", MON_CAP_W | MON_CAP_X)) {
+ dout(10) << " insufficient caps" << dendl;
+ return true;
+ }
+
+ const auto name_info_i = pending_map.mon_info.find(join->name);
+ if (name_info_i != pending_map.mon_info.end() &&
+ !name_info_i->second.public_addrs.front().is_blank_ip() &&
+ (!join->force_loc || join->crush_loc == name_info_i->second.crush_loc)) {
+ dout(10) << " already have " << join->name << dendl;
+ return true;
+ }
+ string addr_name;
+ if (pending_map.contains(join->addrs)) {
+ addr_name = pending_map.get_name(join->addrs);
+ }
+ if (!addr_name.empty() &&
+ addr_name == join->name &&
+ (!join->force_loc || join->crush_loc.empty() ||
+ pending_map.mon_info[addr_name].crush_loc == join->crush_loc)) {
+ dout(10) << " already have " << join->addrs << dendl;
+ return true;
+ }
+ if (pending_map.stretch_mode_enabled &&
+ join->crush_loc.empty() &&
+ (addr_name.empty() ||
+ pending_map.mon_info[addr_name].crush_loc.empty())) {
+ dout(10) << "stretch mode engaged but no source of crush_loc" << dendl;
+ mon.clog->info() << join->name << " attempted to join from " << join->name
+ << ' ' << join->addrs
+ << "; but lacks a crush_location for stretch mode";
+ return true;
+ }
+ return false;
+}
+
+bool MonmapMonitor::prepare_join(MonOpRequestRef op)
+{
+ auto join = op->get_req<MMonJoin>();
+ dout(0) << "adding/updating " << join->name
+ << " at " << join->addrs << " to monitor cluster" << dendl;
+ map<string,string> existing_loc;
+ if (pending_map.contains(join->addrs)) {
+ string name = pending_map.get_name(join->addrs);
+ existing_loc = pending_map.mon_info[name].crush_loc;
+ pending_map.remove(name);
+ }
+ if (pending_map.contains(join->name))
+ pending_map.remove(join->name);
+ pending_map.add(join->name, join->addrs);
+ pending_map.mon_info[join->name].crush_loc =
+ ((join->force_loc || existing_loc.empty()) ?
+ join->crush_loc : existing_loc);
+ pending_map.last_changed = ceph_clock_now();
+ return true;
+}
+
+bool MonmapMonitor::should_propose(double& delay)
+{
+ delay = 0.0;
+ return true;
+}
+
+int MonmapMonitor::get_monmap(bufferlist &bl)
+{
+ version_t latest_ver = get_last_committed();
+ dout(10) << __func__ << " ver " << latest_ver << dendl;
+
+ if (!mon.store->exists(get_service_name(), stringify(latest_ver)))
+ return -ENOENT;
+
+ int err = get_version(latest_ver, bl);
+ if (err < 0) {
+ dout(1) << __func__ << " error obtaining monmap: "
+ << cpp_strerror(err) << dendl;
+ return err;
+ }
+ return 0;
+}
+
+void MonmapMonitor::check_subs()
+{
+ const string type = "monmap";
+ mon.with_session_map([this, &type](const MonSessionMap& session_map) {
+ auto subs = session_map.subs.find(type);
+ if (subs == session_map.subs.end())
+ return;
+ for (auto sub : *subs->second) {
+ check_sub(sub);
+ }
+ });
+}
+
+void MonmapMonitor::check_sub(Subscription *sub)
+{
+ const auto epoch = mon.monmap->get_epoch();
+ dout(10) << __func__
+ << " monmap next " << sub->next
+ << " have " << epoch << dendl;
+ if (sub->next <= epoch) {
+ mon.send_latest_monmap(sub->session->con.get());
+ if (sub->onetime) {
+ mon.with_session_map([sub](MonSessionMap& session_map) {
+ session_map.remove_sub(sub);
+ });
+ } else {
+ sub->next = epoch + 1;
+ }
+ }
+}
+
+void MonmapMonitor::tick()
+{
+ if (!is_active() ||
+ !mon.is_leader()) {
+ return;
+ }
+
+ if (mon.monmap->created.is_zero()) {
+ dout(10) << __func__ << " detected empty created stamp" << dendl;
+ utime_t ctime;
+ for (version_t v = 1; v <= get_last_committed(); v++) {
+ bufferlist bl;
+ int r = get_version(v, bl);
+ if (r < 0) {
+ continue;
+ }
+ MonMap m;
+ auto p = bl.cbegin();
+ decode(m, p);
+ if (!m.last_changed.is_zero()) {
+ dout(10) << __func__ << " first monmap with last_changed is "
+ << v << " with " << m.last_changed << dendl;
+ ctime = m.last_changed;
+ break;
+ }
+ }
+ if (ctime.is_zero()) {
+ ctime = ceph_clock_now();
+ }
+ dout(10) << __func__ << " updating created stamp to " << ctime << dendl;
+ pending_map.created = ctime;
+ propose_pending();
+ }
+}