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ceph/src/ceph_mon.cc
Kefu Chai df771861f1 src/: define ceph_release_t and use it 
we have following pains when it comes to ceph release related
programming:

* we use int, uint8_t, uint32_t, unsigned int for representing the ceph
  release, i.e., jewel, luminous, nautilus, in different places in our
  source tree.
* we always need to add a comment aside of `uint8_t release` to help
  the folks to understand that it is CEPH_RELEASE_*.
* also we keep forgetting that "os << release" actually prints the
  release as an ASCII.
* and it's painful to remember that we have to translate the release
  number using `ceph_release_name()` before print it out in the human
  readable format.
* we replicate the n+2 upgrade policy in multiple places

in this change, `ceph_release_t` and some helper functions are
intruduced to alleviate the pains above.

* add a scoped enum for representing ceph releases, so the release
  is typed . which means that we can attach different function to
  it. and in future, we can even replace `ceph_release_t` with
  a class if we need to support more fancy features which cannot be
  implemented using free functions.
* add `ostream<<()` operator for `ceph_release_t`, so we can simply
  send it to `ostream`
* add `can_upgrade_from()` so we don't need to repeat ourselves.
* move ceph_release_from_name() to ceph_release.{h,cc}, as currently,
  ceph_release.cc uses `ceph_release_name()` for implementing
  `ostream<<()`, and after this change, `ceph_release_from_name()`
  will return `ceph_release_t`, so if we keep `ceph_release_from_name()`
  where it was, these two headers will be included by each other,
  which is a no-go.
* reimplement `ceph_release_from_name()` using a loop. before this
  change, `ceph_release_from_name()` was implemented using a manually
  unrolled if-else structure, which is more performant, but the
  downside is that, it replicates mapping between release number
  and its name. so after this change, a loop is used instead.
  as this function is not used in the critical path, so this change
  should not have visible impact on the performance.
* always use ceph_release_t::unknown as the default value of the
  "release" member variables. before this change, sometimes, we use
  "0" and sometimes we use "1", after inspecting the code, i found that
  "0" is good enough to cover all the use cases. and since "0" is a
  magic number in this context, it is replaced using
  `ceph_release_t::unknown`. to facilidate the checking against
  `ceph_release_t::unknown`, `operator!()` is added.
* ceph::to_string() and ceph::to_integer<>() are added to help
  to remove the asssumption of the underlying type of `ceph_release_t`,
  ideally, users of `ceph_release_t` should not use `static_cast<>` to
  cast it into integer types, instead, they should use
  `ceph::to_integer<>()` to do this job. if, in future, we want to
  use a `class` to represent `ceph_release_t`, we can get this done
  with minimum change, if `ceph::to_string()` and `ceph::to_string()`
  are used. we can not specialize them in `std` naming space. as
  it's claimed that it's undefined behavior to do so. see
  https://en.cppreference.com/w/cpp/language/extending_std .

Signed-off-by: Kefu Chai <kchai@redhat.com>
2019-05-04 02:51:27 -04:00

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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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <iostream>
#include <string>
#include "common/config.h"
#include "include/ceph_features.h"
#include "mon/MonMap.h"
#include "mon/Monitor.h"
#include "mon/MonitorDBStore.h"
#include "mon/MonClient.h"
#include "msg/Messenger.h"
#include "include/CompatSet.h"
#include "common/ceph_argparse.h"
#include "common/pick_address.h"
#include "common/Throttle.h"
#include "common/Timer.h"
#include "common/errno.h"
#include "common/Preforker.h"
#include "global/global_init.h"
#include "global/signal_handler.h"
#include "perfglue/heap_profiler.h"
#include "include/ceph_assert.h"
#define dout_subsys ceph_subsys_mon
Monitor *mon = NULL;
void handle_mon_signal(int signum)
{
if (mon)
mon->handle_signal(signum);
}
int obtain_monmap(MonitorDBStore &store, bufferlist &bl)
{
dout(10) << __func__ << dendl;
/*
* the monmap may be in one of three places:
* 'monmap:<latest_version_no>' - the monmap we'd really like to have
* 'mon_sync:latest_monmap' - last monmap backed up for the last sync
* 'mkfs:monmap' - a monmap resulting from mkfs
*/
if (store.exists("monmap", "last_committed")) {
version_t latest_ver = store.get("monmap", "last_committed");
if (store.exists("monmap", latest_ver)) {
int err = store.get("monmap", latest_ver, bl);
ceph_assert(err == 0);
ceph_assert(bl.length() > 0);
dout(10) << __func__ << " read last committed monmap ver "
<< latest_ver << dendl;
return 0;
}
}
if (store.exists("mon_sync", "in_sync")
|| store.exists("mon_sync", "force_sync")) {
dout(10) << __func__ << " detected aborted sync" << dendl;
if (store.exists("mon_sync", "latest_monmap")) {
int err = store.get("mon_sync", "latest_monmap", bl);
ceph_assert(err == 0);
ceph_assert(bl.length() > 0);
dout(10) << __func__ << " read backup monmap" << dendl;
return 0;
}
}
if (store.exists("mkfs", "monmap")) {
dout(10) << __func__ << " found mkfs monmap" << dendl;
int err = store.get("mkfs", "monmap", bl);
ceph_assert(err == 0);
ceph_assert(bl.length() > 0);
return 0;
}
derr << __func__ << " unable to find a monmap" << dendl;
return -ENOENT;
}
int check_mon_data_exists()
{
string mon_data = g_conf()->mon_data;
struct stat buf;
if (::stat(mon_data.c_str(), &buf)) {
if (errno != ENOENT) {
derr << "stat(" << mon_data << ") " << cpp_strerror(errno) << dendl;
}
return -errno;
}
return 0;
}
/** Check whether **mon data** is empty.
*
* Being empty means mkfs has not been run and there's no monitor setup
* at **g_conf()->mon_data**.
*
* If the directory g_conf()->mon_data is not empty we will return -ENOTEMPTY.
* Otherwise we will return 0. Any other negative returns will represent
* a failure to be handled by the caller.
*
* @return **0** on success, -ENOTEMPTY if not empty or **-errno** otherwise.
*/
int check_mon_data_empty()
{
string mon_data = g_conf()->mon_data;
DIR *dir = ::opendir(mon_data.c_str());
if (!dir) {
derr << "opendir(" << mon_data << ") " << cpp_strerror(errno) << dendl;
return -errno;
}
int code = 0;
struct dirent *de = nullptr;
errno = 0;
while ((de = ::readdir(dir))) {
if (string(".") != de->d_name &&
string("..") != de->d_name &&
string("kv_backend") != de->d_name) {
code = -ENOTEMPTY;
break;
}
}
if (!de && errno) {
derr << "readdir(" << mon_data << ") " << cpp_strerror(errno) << dendl;
code = -errno;
}
::closedir(dir);
return code;
}
static void usage()
{
cout << "usage: ceph-mon -i <ID> [flags]\n"
<< " --debug_mon n\n"
<< " debug monitor level (e.g. 10)\n"
<< " --mkfs\n"
<< " build fresh monitor fs\n"
<< " --force-sync\n"
<< " force a sync from another mon by wiping local data (BE CAREFUL)\n"
<< " --yes-i-really-mean-it\n"
<< " mandatory safeguard for --force-sync\n"
<< " --compact\n"
<< " compact the monitor store\n"
<< " --osdmap <filename>\n"
<< " only used when --mkfs is provided: load the osdmap from <filename>\n"
<< " --inject-monmap <filename>\n"
<< " write the <filename> monmap to the local monitor store and exit\n"
<< " --extract-monmap <filename>\n"
<< " extract the monmap from the local monitor store and exit\n"
<< " --mon-data <directory>\n"
<< " where the mon store and keyring are located\n"
<< std::endl;
generic_server_usage();
}
entity_addrvec_t make_mon_addrs(entity_addr_t a)
{
entity_addrvec_t addrs;
if (a.get_port() == 0) {
a.set_type(entity_addr_t::TYPE_MSGR2);
a.set_port(CEPH_MON_PORT_IANA);
addrs.v.push_back(a);
a.set_type(entity_addr_t::TYPE_LEGACY);
a.set_port(CEPH_MON_PORT_LEGACY);
addrs.v.push_back(a);
} else if (a.get_port() == CEPH_MON_PORT_LEGACY) {
a.set_type(entity_addr_t::TYPE_LEGACY);
addrs.v.push_back(a);
} else {
a.set_type(entity_addr_t::TYPE_MSGR2);
addrs.v.push_back(a);
}
return addrs;
}
int main(int argc, const char **argv)
{
// reset our process name, in case we did a respawn, so that it's not
// left as "exe".
ceph_pthread_setname(pthread_self(), "ceph-mon");
int err;
bool mkfs = false;
bool compact = false;
bool force_sync = false;
bool yes_really = false;
std::string osdmapfn, inject_monmap, extract_monmap;
vector<const char*> args;
argv_to_vec(argc, argv, args);
if (args.empty()) {
cerr << argv[0] << ": -h or --help for usage" << std::endl;
exit(1);
}
if (ceph_argparse_need_usage(args)) {
usage();
exit(0);
}
// We need to specify some default values that may be overridden by the
// user, that are specific to the monitor. The options we are overriding
// are also used on the OSD (or in any other component that uses leveldb),
// so changing the global defaults is not an option.
// This is not the prettiest way of doing this, especially since it has us
// having a different place defining default values, but it's not horribly
// wrong enough to prevent us from doing it :)
//
// NOTE: user-defined options will take precedence over ours.
//
// leveldb_write_buffer_size = 32*1024*1024 = 33554432 // 32MB
// leveldb_cache_size = 512*1024*1204 = 536870912 // 512MB
// leveldb_block_size = 64*1024 = 65536 // 64KB
// leveldb_compression = false
// leveldb_log = ""
map<string,string> defaults = {
{ "leveldb_write_buffer_size", "33554432" },
{ "leveldb_cache_size", "536870912" },
{ "leveldb_block_size", "65536" },
{ "leveldb_compression", "false"},
{ "leveldb_log", "" },
{ "keyring", "$mon_data/keyring" },
};
int flags = 0;
{
vector<const char*> args_copy = args;
std::string val;
for (std::vector<const char*>::iterator i = args_copy.begin();
i != args_copy.end(); ) {
if (ceph_argparse_double_dash(args_copy, i)) {
break;
} else if (ceph_argparse_flag(args_copy, i, "--mkfs", (char*)NULL)) {
flags |= CINIT_FLAG_NO_DAEMON_ACTIONS;
} else if (ceph_argparse_witharg(args_copy, i, &val, "--inject_monmap", (char*)NULL)) {
flags |= CINIT_FLAG_NO_DAEMON_ACTIONS;
} else if (ceph_argparse_witharg(args_copy, i, &val, "--extract-monmap", (char*)NULL)) {
flags |= CINIT_FLAG_NO_DAEMON_ACTIONS;
} else {
++i;
}
}
}
// don't try to get config from mon cluster during startup
flags |= CINIT_FLAG_NO_MON_CONFIG;
auto cct = global_init(&defaults, args,
CEPH_ENTITY_TYPE_MON, CODE_ENVIRONMENT_DAEMON,
flags, "mon_data");
ceph_heap_profiler_init();
std::string val;
for (std::vector<const char*>::iterator i = args.begin(); i != args.end(); ) {
if (ceph_argparse_double_dash(args, i)) {
break;
} else if (ceph_argparse_flag(args, i, "--mkfs", (char*)NULL)) {
mkfs = true;
} else if (ceph_argparse_flag(args, i, "--compact", (char*)NULL)) {
compact = true;
} else if (ceph_argparse_flag(args, i, "--force-sync", (char*)NULL)) {
force_sync = true;
} else if (ceph_argparse_flag(args, i, "--yes-i-really-mean-it", (char*)NULL)) {
yes_really = true;
} else if (ceph_argparse_witharg(args, i, &val, "--osdmap", (char*)NULL)) {
osdmapfn = val;
} else if (ceph_argparse_witharg(args, i, &val, "--inject_monmap", (char*)NULL)) {
inject_monmap = val;
} else if (ceph_argparse_witharg(args, i, &val, "--extract-monmap", (char*)NULL)) {
extract_monmap = val;
} else {
++i;
}
}
if (!args.empty()) {
cerr << "too many arguments: " << args << std::endl;
exit(1);
}
if (force_sync && !yes_really) {
cerr << "are you SURE you want to force a sync? this will erase local data and may\n"
<< "break your mon cluster. pass --yes-i-really-mean-it if you do." << std::endl;
exit(1);
}
if (g_conf()->mon_data.empty()) {
cerr << "must specify '--mon-data=foo' data path" << std::endl;
exit(1);
}
if (g_conf()->name.get_id().empty()) {
cerr << "must specify id (--id <id> or --name mon.<id>)" << std::endl;
exit(1);
}
// -- mkfs --
if (mkfs) {
int err = check_mon_data_exists();
if (err == -ENOENT) {
if (::mkdir(g_conf()->mon_data.c_str(), 0755)) {
derr << "mkdir(" << g_conf()->mon_data << ") : "
<< cpp_strerror(errno) << dendl;
exit(1);
}
} else if (err < 0) {
derr << "error opening '" << g_conf()->mon_data << "': "
<< cpp_strerror(-err) << dendl;
exit(-err);
}
err = check_mon_data_empty();
if (err == -ENOTEMPTY) {
// Mon may exist. Let the user know and exit gracefully.
derr << "'" << g_conf()->mon_data << "' already exists and is not empty"
<< ": monitor may already exist" << dendl;
exit(0);
} else if (err < 0) {
derr << "error checking if '" << g_conf()->mon_data << "' is empty: "
<< cpp_strerror(-err) << dendl;
exit(-err);
}
// resolve public_network -> public_addr
pick_addresses(g_ceph_context, CEPH_PICK_ADDRESS_PUBLIC);
dout(10) << "public_network " << g_conf()->public_network << dendl;
dout(10) << "public_addr " << g_conf()->public_network << dendl;
common_init_finish(g_ceph_context);
bufferlist monmapbl, osdmapbl;
std::string error;
MonMap monmap;
// load or generate monmap
const auto monmap_fn = g_conf().get_val<string>("monmap");
if (monmap_fn.length()) {
int err = monmapbl.read_file(monmap_fn.c_str(), &error);
if (err < 0) {
derr << argv[0] << ": error reading " << monmap_fn << ": " << error << dendl;
exit(1);
}
try {
monmap.decode(monmapbl);
// always mark seed/mkfs monmap as epoch 0
monmap.set_epoch(0);
} catch (const buffer::error& e) {
derr << argv[0] << ": error decoding monmap " << monmap_fn << ": " << e.what() << dendl;
exit(1);
}
dout(1) << "imported monmap:\n";
monmap.print(*_dout);
*_dout << dendl;
} else {
ostringstream oss;
int err = monmap.build_initial(g_ceph_context, true, oss);
if (oss.tellp())
derr << oss.str() << dendl;
if (err < 0) {
derr << argv[0] << ": warning: no initial monitors; must use admin socket to feed hints" << dendl;
}
dout(1) << "initial generated monmap:\n";
monmap.print(*_dout);
*_dout << dendl;
// am i part of the initial quorum?
if (monmap.contains(g_conf()->name.get_id())) {
// hmm, make sure the ip listed exists on the current host?
// maybe later.
} else if (!g_conf()->public_addr.is_blank_ip()) {
entity_addrvec_t av = make_mon_addrs(g_conf()->public_addr);
string name;
if (monmap.contains(av, &name)) {
monmap.rename(name, g_conf()->name.get_id());
dout(0) << argv[0] << ": renaming mon." << name << " " << av
<< " to mon." << g_conf()->name.get_id() << dendl;
}
} else {
// is a local address listed without a name? if so, name myself.
list<entity_addr_t> ls;
monmap.list_addrs(ls);
dout(0) << " monmap addrs are " << ls << ", checking if any are local"
<< dendl;
entity_addr_t local;
if (have_local_addr(g_ceph_context, ls, &local)) {
dout(0) << " have local addr " << local << dendl;
string name;
local.set_type(entity_addr_t::TYPE_MSGR2);
if (!monmap.get_addr_name(local, name)) {
local.set_type(entity_addr_t::TYPE_LEGACY);
if (!monmap.get_addr_name(local, name)) {
dout(0) << "no local addresses appear in bootstrap monmap"
<< dendl;
}
}
if (name.compare(0, 7, "noname-") == 0) {
dout(0) << argv[0] << ": mon." << name << " " << local
<< " is local, renaming to mon." << g_conf()->name.get_id()
<< dendl;
monmap.rename(name, g_conf()->name.get_id());
} else if (name.size()) {
dout(0) << argv[0] << ": mon." << name << " " << local
<< " is local, but not 'noname-' + something; "
<< "not assuming it's me" << dendl;
}
} else {
dout(0) << " no local addrs match monmap" << dendl;
}
}
}
const auto fsid = g_conf().get_val<uuid_d>("fsid");
if (!fsid.is_zero()) {
monmap.fsid = fsid;
dout(0) << argv[0] << ": set fsid to " << fsid << dendl;
}
if (monmap.fsid.is_zero()) {
derr << argv[0] << ": generated monmap has no fsid; use '--fsid <uuid>'" << dendl;
exit(10);
}
//monmap.print(cout);
// osdmap
if (osdmapfn.length()) {
err = osdmapbl.read_file(osdmapfn.c_str(), &error);
if (err < 0) {
derr << argv[0] << ": error reading " << osdmapfn << ": "
<< error << dendl;
exit(1);
}
}
// go
MonitorDBStore store(g_conf()->mon_data);
ostringstream oss;
int r = store.create_and_open(oss);
if (oss.tellp())
derr << oss.str() << dendl;
if (r < 0) {
derr << argv[0] << ": error opening mon data directory at '"
<< g_conf()->mon_data << "': " << cpp_strerror(r) << dendl;
exit(1);
}
ceph_assert(r == 0);
Monitor mon(g_ceph_context, g_conf()->name.get_id(), &store, 0, 0, &monmap);
r = mon.mkfs(osdmapbl);
if (r < 0) {
derr << argv[0] << ": error creating monfs: " << cpp_strerror(r) << dendl;
exit(1);
}
store.close();
dout(0) << argv[0] << ": created monfs at " << g_conf()->mon_data
<< " for " << g_conf()->name << dendl;
return 0;
}
err = check_mon_data_exists();
if (err < 0 && err == -ENOENT) {
derr << "monitor data directory at '" << g_conf()->mon_data << "'"
<< " does not exist: have you run 'mkfs'?" << dendl;
exit(1);
} else if (err < 0) {
derr << "error accessing monitor data directory at '"
<< g_conf()->mon_data << "': " << cpp_strerror(-err) << dendl;
exit(1);
}
err = check_mon_data_empty();
if (err == 0) {
derr << "monitor data directory at '" << g_conf()->mon_data
<< "' is empty: have you run 'mkfs'?" << dendl;
exit(1);
} else if (err < 0 && err != -ENOTEMPTY) {
// we don't want an empty data dir by now
derr << "error accessing '" << g_conf()->mon_data << "': "
<< cpp_strerror(-err) << dendl;
exit(1);
}
{
// check fs stats. don't start if it's critically close to full.
ceph_data_stats_t stats;
int err = get_fs_stats(stats, g_conf()->mon_data.c_str());
if (err < 0) {
derr << "error checking monitor data's fs stats: " << cpp_strerror(err)
<< dendl;
exit(-err);
}
if (stats.avail_percent <= g_conf()->mon_data_avail_crit) {
derr << "error: monitor data filesystem reached concerning levels of"
<< " available storage space (available: "
<< stats.avail_percent << "% " << byte_u_t(stats.byte_avail)
<< ")\nyou may adjust 'mon data avail crit' to a lower value"
<< " to make this go away (default: " << g_conf()->mon_data_avail_crit
<< "%)\n" << dendl;
exit(ENOSPC);
}
}
// we fork early to prevent leveldb's environment static state from
// screwing us over
Preforker prefork;
if (!(flags & CINIT_FLAG_NO_DAEMON_ACTIONS)) {
if (global_init_prefork(g_ceph_context) >= 0) {
string err_msg;
err = prefork.prefork(err_msg);
if (err < 0) {
derr << err_msg << dendl;
prefork.exit(err);
}
if (prefork.is_parent()) {
err = prefork.parent_wait(err_msg);
if (err < 0)
derr << err_msg << dendl;
prefork.exit(err);
}
setsid();
global_init_postfork_start(g_ceph_context);
}
common_init_finish(g_ceph_context);
global_init_chdir(g_ceph_context);
if (global_init_preload_erasure_code(g_ceph_context) < 0)
prefork.exit(1);
}
// set up signal handlers, now that we've daemonized/forked.
init_async_signal_handler();
register_async_signal_handler(SIGHUP, sighup_handler);
MonitorDBStore *store = new MonitorDBStore(g_conf()->mon_data);
// make sure we aren't upgrading too fast
{
string val;
int r = store->read_meta("min_mon_release", &val);
if (r >= 0 && val.size()) {
ceph_release_t from_release = ceph_release_from_name(val);
ostringstream err;
if (!can_upgrade_from(from_release, "min_mon_release", err)) {
derr << err.str() << dendl;
prefork.exit(1);
}
}
}
{
ostringstream oss;
err = store->open(oss);
if (oss.tellp())
derr << oss.str() << dendl;
if (err < 0) {
derr << "error opening mon data directory at '"
<< g_conf()->mon_data << "': " << cpp_strerror(err) << dendl;
prefork.exit(1);
}
}
bufferlist magicbl;
err = store->get(Monitor::MONITOR_NAME, "magic", magicbl);
if (err || !magicbl.length()) {
derr << "unable to read magic from mon data" << dendl;
prefork.exit(1);
}
string magic(magicbl.c_str(), magicbl.length()-1); // ignore trailing \n
if (strcmp(magic.c_str(), CEPH_MON_ONDISK_MAGIC)) {
derr << "mon fs magic '" << magic << "' != current '" << CEPH_MON_ONDISK_MAGIC << "'" << dendl;
prefork.exit(1);
}
err = Monitor::check_features(store);
if (err < 0) {
derr << "error checking features: " << cpp_strerror(err) << dendl;
prefork.exit(1);
}
// inject new monmap?
if (!inject_monmap.empty()) {
bufferlist bl;
std::string error;
int r = bl.read_file(inject_monmap.c_str(), &error);
if (r) {
derr << "unable to read monmap from " << inject_monmap << ": "
<< error << dendl;
prefork.exit(1);
}
// get next version
version_t v = store->get("monmap", "last_committed");
dout(0) << "last committed monmap epoch is " << v << ", injected map will be " << (v+1)
<< dendl;
v++;
// set the version
MonMap tmp;
tmp.decode(bl);
if (tmp.get_epoch() != v) {
dout(0) << "changing monmap epoch from " << tmp.get_epoch()
<< " to " << v << dendl;
tmp.set_epoch(v);
}
bufferlist mapbl;
tmp.encode(mapbl, CEPH_FEATURES_ALL);
bufferlist final;
encode(v, final);
encode(mapbl, final);
auto t(std::make_shared<MonitorDBStore::Transaction>());
// save it
t->put("monmap", v, mapbl);
t->put("monmap", "latest", final);
t->put("monmap", "last_committed", v);
store->apply_transaction(t);
dout(0) << "done." << dendl;
prefork.exit(0);
}
// monmap?
MonMap monmap;
{
// note that even if we don't find a viable monmap, we should go ahead
// and try to build it up in the next if-else block.
bufferlist mapbl;
int err = obtain_monmap(*store, mapbl);
if (err >= 0) {
try {
monmap.decode(mapbl);
} catch (const buffer::error& e) {
derr << "can't decode monmap: " << e.what() << dendl;
}
} else {
derr << "unable to obtain a monmap: " << cpp_strerror(err) << dendl;
}
dout(10) << __func__ << " monmap:\n";
JSONFormatter jf(true);
jf.dump_object("monmap", monmap);
jf.flush(*_dout);
*_dout << dendl;
if (!extract_monmap.empty()) {
int r = mapbl.write_file(extract_monmap.c_str());
if (r < 0) {
r = -errno;
derr << "error writing monmap to " << extract_monmap << ": " << cpp_strerror(r) << dendl;
prefork.exit(1);
}
derr << "wrote monmap to " << extract_monmap << dendl;
prefork.exit(0);
}
}
// this is what i will bind to
entity_addrvec_t ipaddrs;
if (monmap.contains(g_conf()->name.get_id())) {
ipaddrs = monmap.get_addrs(g_conf()->name.get_id());
// print helpful warning if the conf file doesn't match
std::vector <std::string> my_sections;
g_conf().get_my_sections(my_sections);
std::string mon_addr_str;
if (g_conf().get_val_from_conf_file(my_sections, "mon addr",
mon_addr_str, true) == 0) {
entity_addr_t conf_addr;
if (conf_addr.parse(mon_addr_str.c_str())) {
entity_addrvec_t conf_addrs = make_mon_addrs(conf_addr);
if (ipaddrs != conf_addrs) {
derr << "WARNING: 'mon addr' config option " << conf_addrs
<< " does not match monmap file" << std::endl
<< " continuing with monmap configuration" << dendl;
}
} else
derr << "WARNING: invalid 'mon addr' config option" << std::endl
<< " continuing with monmap configuration" << dendl;
}
} else {
dout(0) << g_conf()->name << " does not exist in monmap, will attempt to join an existing cluster" << dendl;
pick_addresses(g_ceph_context, CEPH_PICK_ADDRESS_PUBLIC);
if (!g_conf()->public_addr.is_blank_ip()) {
ipaddrs = make_mon_addrs(g_conf()->public_addr);
dout(0) << "using public_addr " << g_conf()->public_addr << " -> "
<< ipaddrs << dendl;
} else {
MonMap tmpmap;
ostringstream oss;
int err = tmpmap.build_initial(g_ceph_context, true, oss);
if (oss.tellp())
derr << oss.str() << dendl;
if (err < 0) {
derr << argv[0] << ": error generating initial monmap: "
<< cpp_strerror(err) << dendl;
prefork.exit(1);
}
if (tmpmap.contains(g_conf()->name.get_id())) {
ipaddrs = tmpmap.get_addrs(g_conf()->name.get_id());
} else {
derr << "no public_addr or public_network specified, and "
<< g_conf()->name << " not present in monmap or ceph.conf" << dendl;
prefork.exit(1);
}
}
}
// bind
int rank = monmap.get_rank(g_conf()->name.get_id());
std::string public_msgr_type = g_conf()->ms_public_type.empty() ? g_conf().get_val<std::string>("ms_type") : g_conf()->ms_public_type;
Messenger *msgr = Messenger::create(g_ceph_context, public_msgr_type,
entity_name_t::MON(rank), "mon",
0, Messenger::HAS_MANY_CONNECTIONS);
if (!msgr)
exit(1);
msgr->set_cluster_protocol(CEPH_MON_PROTOCOL);
msgr->set_default_send_priority(CEPH_MSG_PRIO_HIGH);
msgr->set_default_policy(Messenger::Policy::stateless_server(0));
msgr->set_policy(entity_name_t::TYPE_MON,
Messenger::Policy::lossless_peer_reuse(
CEPH_FEATURE_SERVER_LUMINOUS));
msgr->set_policy(entity_name_t::TYPE_OSD,
Messenger::Policy::stateless_server(
CEPH_FEATURE_SERVER_LUMINOUS));
msgr->set_policy(entity_name_t::TYPE_CLIENT,
Messenger::Policy::stateless_server(0));
msgr->set_policy(entity_name_t::TYPE_MDS,
Messenger::Policy::stateless_server(0));
// throttle client traffic
Throttle *client_throttler = new Throttle(g_ceph_context, "mon_client_bytes",
g_conf()->mon_client_bytes);
msgr->set_policy_throttlers(entity_name_t::TYPE_CLIENT,
client_throttler, NULL);
// throttle daemon traffic
// NOTE: actual usage on the leader may multiply by the number of
// monitors if they forward large update messages from daemons.
Throttle *daemon_throttler = new Throttle(g_ceph_context, "mon_daemon_bytes",
g_conf()->mon_daemon_bytes);
msgr->set_policy_throttlers(entity_name_t::TYPE_OSD, daemon_throttler,
NULL);
msgr->set_policy_throttlers(entity_name_t::TYPE_MDS, daemon_throttler,
NULL);
entity_addrvec_t bind_addrs = ipaddrs;
entity_addrvec_t public_addrs = ipaddrs;
// check if the public_bind_addr option is set
if (!g_conf()->public_bind_addr.is_blank_ip()) {
bind_addrs = make_mon_addrs(g_conf()->public_bind_addr);
}
dout(0) << "starting " << g_conf()->name << " rank " << rank
<< " at public addrs " << public_addrs
<< " at bind addrs " << bind_addrs
<< " mon_data " << g_conf()->mon_data
<< " fsid " << monmap.get_fsid()
<< dendl;
Messenger *mgr_msgr = Messenger::create(g_ceph_context, public_msgr_type,
entity_name_t::MON(rank), "mon-mgrc",
getpid(), 0);
if (!mgr_msgr) {
derr << "unable to create mgr_msgr" << dendl;
prefork.exit(1);
}
mon = new Monitor(g_ceph_context, g_conf()->name.get_id(), store,
msgr, mgr_msgr, &monmap);
mon->orig_argc = argc;
mon->orig_argv = argv;
if (force_sync) {
derr << "flagging a forced sync ..." << dendl;
ostringstream oss;
mon->sync_force(NULL, oss);
if (oss.tellp())
derr << oss.str() << dendl;
}
err = mon->preinit();
if (err < 0) {
derr << "failed to initialize" << dendl;
prefork.exit(1);
}
if (compact || g_conf()->mon_compact_on_start) {
derr << "compacting monitor store ..." << dendl;
mon->store->compact();
derr << "done compacting" << dendl;
}
// bind
err = msgr->bindv(bind_addrs);
if (err < 0) {
derr << "unable to bind monitor to " << bind_addrs << dendl;
prefork.exit(1);
}
// if the public and bind addr are different set the msgr addr
// to the public one, now that the bind is complete.
if (public_addrs != bind_addrs) {
msgr->set_addrs(public_addrs);
}
if (g_conf()->daemonize) {
global_init_postfork_finish(g_ceph_context);
prefork.daemonize();
}
msgr->start();
mgr_msgr->start();
mon->init();
register_async_signal_handler_oneshot(SIGINT, handle_mon_signal);
register_async_signal_handler_oneshot(SIGTERM, handle_mon_signal);
if (g_conf()->inject_early_sigterm)
kill(getpid(), SIGTERM);
msgr->wait();
mgr_msgr->wait();
store->close();
unregister_async_signal_handler(SIGHUP, sighup_handler);
unregister_async_signal_handler(SIGINT, handle_mon_signal);
unregister_async_signal_handler(SIGTERM, handle_mon_signal);
shutdown_async_signal_handler();
delete mon;
delete store;
delete msgr;
delete mgr_msgr;
delete client_throttler;
delete daemon_throttler;
// cd on exit, so that gmon.out (if any) goes into a separate directory for each node.
char s[20];
snprintf(s, sizeof(s), "gmon/%d", getpid());
if ((mkdir(s, 0755) == 0) && (chdir(s) == 0)) {
dout(0) << "ceph-mon: gmon.out should be in " << s << dendl;
}
prefork.signal_exit(0);
return 0;
}
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