/
MDSMonitor.cc
3042 lines (2698 loc) · 89.4 KB
/
MDSMonitor.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 <sstream>
#include <boost/utility.hpp>
#include "MDSMonitor.h"
#include "Monitor.h"
#include "MonitorDBStore.h"
#include "OSDMonitor.h"
#include "common/strtol.h"
#include "common/perf_counters.h"
#include "common/config.h"
#include "common/cmdparse.h"
#include "messages/MMDSMap.h"
#include "messages/MFSMap.h"
#include "messages/MFSMapUser.h"
#include "messages/MMDSLoadTargets.h"
#include "messages/MMonCommand.h"
#include "messages/MGenericMessage.h"
#include "include/assert.h"
#include "include/str_list.h"
#include "include/stringify.h"
#include "mds/mdstypes.h"
#include "Session.h"
#define dout_subsys ceph_subsys_mon
#undef dout_prefix
#define dout_prefix _prefix(_dout, mon, fsmap)
static ostream& _prefix(std::ostream *_dout, Monitor *mon, FSMap const& fsmap) {
return *_dout << "mon." << mon->name << "@" << mon->rank
<< "(" << mon->get_state_name()
<< ").mds e" << fsmap.get_epoch() << " ";
}
/*
* Specialized implementation of cmd_getval to allow us to parse
* out strongly-typedef'd types
*/
template<> bool cmd_getval(CephContext *cct, const cmdmap_t& cmdmap,
std::string k, mds_gid_t &val)
{
return cmd_getval(cct, cmdmap, k, (int64_t&)val);
}
template<> bool cmd_getval(CephContext *cct, const cmdmap_t& cmdmap,
std::string k, mds_rank_t &val)
{
return cmd_getval(cct, cmdmap, k, (int64_t&)val);
}
template<> bool cmd_getval(CephContext *cct, const cmdmap_t& cmdmap,
std::string k, MDSMap::DaemonState &val)
{
return cmd_getval(cct, cmdmap, k, (int64_t&)val);
}
static const string EXPERIMENTAL_WARNING("Warning! This feature is experimental."
"It may cause problems up to and including data loss."
"Consult the documentation at ceph.com, and if unsure, do not proceed."
"Add --yes-i-really-mean-it if you are certain.");
static const string MDS_METADATA_PREFIX("mds_metadata");
// my methods
void MDSMonitor::print_map(FSMap &m, int dbl)
{
dout(dbl) << "print_map\n";
m.print(*_dout);
*_dout << dendl;
}
void MDSMonitor::create_new_fs(FSMap &fsm, const std::string &name,
int metadata_pool, int data_pool)
{
auto fs = std::make_shared<Filesystem>();
fs->mds_map.fs_name = name;
fs->mds_map.max_mds = g_conf->max_mds;
fs->mds_map.data_pools.insert(data_pool);
fs->mds_map.metadata_pool = metadata_pool;
fs->mds_map.cas_pool = -1;
fs->mds_map.max_file_size = g_conf->mds_max_file_size;
fs->mds_map.compat = fsm.compat;
fs->mds_map.created = ceph_clock_now(g_ceph_context);
fs->mds_map.modified = ceph_clock_now(g_ceph_context);
fs->mds_map.session_timeout = g_conf->mds_session_timeout;
fs->mds_map.session_autoclose = g_conf->mds_session_autoclose;
fs->mds_map.enabled = true;
if (mon->get_quorum_features() & CEPH_FEATURE_SERVER_JEWEL) {
fs->fscid = fsm.next_filesystem_id++;
// ANONYMOUS is only for upgrades from legacy mdsmaps, we should
// have initialized next_filesystem_id such that it's never used here.
assert(fs->fscid != FS_CLUSTER_ID_ANONYMOUS);
} else {
// Use anon fscid because this will get thrown away when encoding
// as legacy MDSMap for legacy mons.
assert(fsm.filesystems.empty());
fs->fscid = FS_CLUSTER_ID_ANONYMOUS;
}
fsm.filesystems[fs->fscid] = fs;
// Created first filesystem? Set it as the one
// for legacy clients to use
if (fsm.filesystems.size() == 1) {
fsm.legacy_client_fscid = fs->fscid;
}
print_map(fsm);
}
// service methods
void MDSMonitor::create_initial()
{
dout(10) << "create_initial" << dendl;
}
void MDSMonitor::update_from_paxos(bool *need_bootstrap)
{
version_t version = get_last_committed();
if (version == fsmap.epoch)
return;
dout(10) << __func__ << " version " << version
<< ", my e " << fsmap.epoch << dendl;
assert(version > fsmap.epoch);
// read and decode
fsmap_bl.clear();
int err = get_version(version, fsmap_bl);
assert(err == 0);
assert(fsmap_bl.length() > 0);
dout(10) << __func__ << " got " << version << dendl;
fsmap.decode(fsmap_bl);
// new map
dout(4) << "new map" << dendl;
print_map(fsmap, 0);
if (!g_conf->mon_mds_skip_sanity) {
fsmap.sanity();
}
check_subs();
update_logger();
}
void MDSMonitor::init()
{
(void)load_metadata(pending_metadata);
}
void MDSMonitor::create_pending()
{
pending_fsmap = fsmap;
pending_fsmap.epoch++;
dout(10) << "create_pending e" << pending_fsmap.epoch << dendl;
}
void MDSMonitor::encode_pending(MonitorDBStore::TransactionRef t)
{
dout(10) << "encode_pending e" << pending_fsmap.epoch << dendl;
// print map iff 'debug mon = 30' or higher
print_map(pending_fsmap, 30);
if (!g_conf->mon_mds_skip_sanity) {
pending_fsmap.sanity();
}
// Set 'modified' on maps modified this epoch
for (auto &i : fsmap.filesystems) {
if (i.second->mds_map.epoch == fsmap.epoch) {
i.second->mds_map.modified = ceph_clock_now(g_ceph_context);
}
}
// apply to paxos
assert(get_last_committed() + 1 == pending_fsmap.epoch);
bufferlist fsmap_bl;
pending_fsmap.encode(fsmap_bl, mon->get_quorum_features());
/* put everything in the transaction */
put_version(t, pending_fsmap.epoch, fsmap_bl);
put_last_committed(t, pending_fsmap.epoch);
// Encode MDSHealth data
for (std::map<uint64_t, MDSHealth>::iterator i = pending_daemon_health.begin();
i != pending_daemon_health.end(); ++i) {
bufferlist bl;
i->second.encode(bl);
t->put(MDS_HEALTH_PREFIX, stringify(i->first), bl);
}
for (std::set<uint64_t>::iterator i = pending_daemon_health_rm.begin();
i != pending_daemon_health_rm.end(); ++i) {
t->erase(MDS_HEALTH_PREFIX, stringify(*i));
}
pending_daemon_health_rm.clear();
remove_from_metadata(t);
}
version_t MDSMonitor::get_trim_to()
{
version_t floor = 0;
if (g_conf->mon_mds_force_trim_to > 0 &&
g_conf->mon_mds_force_trim_to < (int)get_last_committed()) {
floor = g_conf->mon_mds_force_trim_to;
dout(10) << __func__ << " explicit mon_mds_force_trim_to = "
<< floor << dendl;
}
unsigned max = g_conf->mon_max_mdsmap_epochs;
version_t last = get_last_committed();
if (last - get_first_committed() > max && floor < last - max)
return last - max;
return floor;
}
void MDSMonitor::update_logger()
{
dout(10) << "update_logger" << dendl;
uint64_t up = 0;
uint64_t in = 0;
uint64_t failed = 0;
for (const auto &i : fsmap.filesystems) {
const MDSMap &mds_map = i.second->mds_map;
up += mds_map.get_num_up_mds();
in += mds_map.get_num_in_mds();
failed += mds_map.get_num_failed_mds();
}
mon->cluster_logger->set(l_cluster_num_mds_up, up);
mon->cluster_logger->set(l_cluster_num_mds_in, in);
mon->cluster_logger->set(l_cluster_num_mds_failed, failed);
mon->cluster_logger->set(l_cluster_mds_epoch, fsmap.get_epoch());
}
bool MDSMonitor::preprocess_query(MonOpRequestRef op)
{
op->mark_mdsmon_event(__func__);
PaxosServiceMessage *m = static_cast<PaxosServiceMessage*>(op->get_req());
dout(10) << "preprocess_query " << *m << " from " << m->get_orig_source_inst() << dendl;
switch (m->get_type()) {
case MSG_MDS_BEACON:
return preprocess_beacon(op);
case MSG_MON_COMMAND:
return preprocess_command(op);
case MSG_MDS_OFFLOAD_TARGETS:
return preprocess_offload_targets(op);
default:
assert(0);
return true;
}
}
void MDSMonitor::_note_beacon(MMDSBeacon *m)
{
mds_gid_t gid = mds_gid_t(m->get_global_id());
version_t seq = m->get_seq();
dout(15) << "_note_beacon " << *m << " noting time" << dendl;
last_beacon[gid].stamp = ceph_clock_now(g_ceph_context);
last_beacon[gid].seq = seq;
}
bool MDSMonitor::preprocess_beacon(MonOpRequestRef op)
{
op->mark_mdsmon_event(__func__);
MMDSBeacon *m = static_cast<MMDSBeacon*>(op->get_req());
MDSMap::DaemonState state = m->get_state();
mds_gid_t gid = m->get_global_id();
version_t seq = m->get_seq();
MDSMap::mds_info_t info;
epoch_t effective_epoch = 0;
// check privileges, ignore if fails
MonSession *session = m->get_session();
assert(session);
if (!session->is_capable("mds", MON_CAP_X)) {
dout(0) << "preprocess_beacon got MMDSBeacon from entity with insufficient privileges "
<< session->caps << dendl;
goto ignore;
}
if (m->get_fsid() != mon->monmap->fsid) {
dout(0) << "preprocess_beacon on fsid " << m->get_fsid() << " != " << mon->monmap->fsid << dendl;
goto ignore;
}
dout(12) << "preprocess_beacon " << *m
<< " from " << m->get_orig_source_inst()
<< " " << m->get_compat()
<< dendl;
// make sure the address has a port
if (m->get_orig_source_addr().get_port() == 0) {
dout(1) << " ignoring boot message without a port" << dendl;
goto ignore;
}
// check compat
if (!m->get_compat().writeable(fsmap.compat)) {
dout(1) << " mds " << m->get_source_inst() << " can't write to fsmap " << fsmap.compat << dendl;
goto ignore;
}
// fw to leader?
if (!mon->is_leader())
return false;
// booted, but not in map?
if (!pending_fsmap.gid_exists(gid)) {
if (state != MDSMap::STATE_BOOT) {
dout(7) << "mds_beacon " << *m << " is not in fsmap (state "
<< ceph_mds_state_name(state) << ")" << dendl;
MDSMap null_map;
null_map.epoch = fsmap.epoch;
null_map.compat = fsmap.compat;
mon->send_reply(op, new MMDSMap(mon->monmap->fsid, &null_map));
return true;
} else {
return false; // not booted yet.
}
}
dout(10) << __func__ << ": GID exists in map: " << gid << dendl;
info = pending_fsmap.get_info_gid(gid);
// old seq?
if (info.state_seq > seq) {
dout(7) << "mds_beacon " << *m << " has old seq, ignoring" << dendl;
goto ignore;
}
// Work out the latest epoch that this daemon should have seen
{
fs_cluster_id_t fscid = pending_fsmap.mds_roles.at(gid);
if (fscid == FS_CLUSTER_ID_NONE) {
effective_epoch = pending_fsmap.standby_epochs.at(gid);
} else {
effective_epoch = pending_fsmap.get_filesystem(fscid)->mds_map.epoch;
}
if (effective_epoch != m->get_last_epoch_seen()) {
dout(10) << "mds_beacon " << *m
<< " ignoring requested state, because mds hasn't seen latest map" << dendl;
goto reply;
}
}
if (info.laggy()) {
_note_beacon(m);
return false; // no longer laggy, need to update map.
}
if (state == MDSMap::STATE_BOOT) {
// ignore, already booted.
goto ignore;
}
// is there a state change here?
if (info.state != state) {
// legal state change?
if ((info.state == MDSMap::STATE_STANDBY ||
info.state == MDSMap::STATE_STANDBY_REPLAY) && state > 0) {
dout(10) << "mds_beacon mds can't activate itself (" << ceph_mds_state_name(info.state)
<< " -> " << ceph_mds_state_name(state) << ")" << dendl;
goto reply;
}
if ((state == MDSMap::STATE_STANDBY || state == MDSMap::STATE_STANDBY_REPLAY)
&& info.rank != MDS_RANK_NONE)
{
dout(4) << "mds_beacon MDS can't go back into standby after taking rank: "
"held rank " << info.rank << " while requesting state "
<< ceph_mds_state_name(state) << dendl;
goto reply;
}
_note_beacon(m);
return false;
}
// Comparing known daemon health with m->get_health()
// and return false (i.e. require proposal) if they
// do not match, to update our stored
if (!(pending_daemon_health[gid] == m->get_health())) {
dout(20) << __func__ << " health metrics for gid " << gid << " were updated" << dendl;
_note_beacon(m);
return false;
}
reply:
// note time and reply
assert(effective_epoch > 0);
_note_beacon(m);
mon->send_reply(op,
new MMDSBeacon(mon->monmap->fsid, m->get_global_id(), m->get_name(),
effective_epoch, state, seq,
CEPH_FEATURES_SUPPORTED_DEFAULT));
return true;
ignore:
// I won't reply this beacon, drop it.
mon->no_reply(op);
return true;
}
bool MDSMonitor::preprocess_offload_targets(MonOpRequestRef op)
{
op->mark_mdsmon_event(__func__);
MMDSLoadTargets *m = static_cast<MMDSLoadTargets*>(op->get_req());
dout(10) << "preprocess_offload_targets " << *m << " from " << m->get_orig_source() << dendl;
// check privileges, ignore message if fails
MonSession *session = m->get_session();
if (!session)
goto done;
if (!session->is_capable("mds", MON_CAP_X)) {
dout(0) << "preprocess_offload_targets got MMDSLoadTargets from entity with insufficient caps "
<< session->caps << dendl;
goto done;
}
if (fsmap.gid_exists(m->global_id) &&
m->targets == fsmap.get_info_gid(m->global_id).export_targets)
goto done;
return false;
done:
return true;
}
bool MDSMonitor::prepare_update(MonOpRequestRef op)
{
op->mark_mdsmon_event(__func__);
PaxosServiceMessage *m = static_cast<PaxosServiceMessage*>(op->get_req());
dout(7) << "prepare_update " << *m << dendl;
switch (m->get_type()) {
case MSG_MDS_BEACON:
return prepare_beacon(op);
case MSG_MON_COMMAND:
return prepare_command(op);
case MSG_MDS_OFFLOAD_TARGETS:
return prepare_offload_targets(op);
default:
assert(0);
}
return true;
}
bool MDSMonitor::prepare_beacon(MonOpRequestRef op)
{
op->mark_mdsmon_event(__func__);
MMDSBeacon *m = static_cast<MMDSBeacon*>(op->get_req());
// -- this is an update --
dout(12) << "prepare_beacon " << *m << " from " << m->get_orig_source_inst() << dendl;
entity_addr_t addr = m->get_orig_source_inst().addr;
mds_gid_t gid = m->get_global_id();
MDSMap::DaemonState state = m->get_state();
version_t seq = m->get_seq();
// Store health
dout(20) << __func__ << " got health from gid " << gid << " with " << m->get_health().metrics.size() << " metrics." << dendl;
pending_daemon_health[gid] = m->get_health();
// boot?
if (state == MDSMap::STATE_BOOT) {
// zap previous instance of this name?
if (g_conf->mds_enforce_unique_name) {
bool failed_mds = false;
while (mds_gid_t existing = pending_fsmap.find_mds_gid_by_name(m->get_name())) {
if (!mon->osdmon()->is_writeable()) {
mon->osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op));
return false;
}
fail_mds_gid(existing);
failed_mds = true;
}
if (failed_mds) {
assert(mon->osdmon()->is_writeable());
request_proposal(mon->osdmon());
}
}
// Add this daemon to the map
if (pending_fsmap.mds_roles.count(gid) == 0) {
MDSMap::mds_info_t new_info;
new_info.global_id = gid;
new_info.name = m->get_name();
new_info.addr = addr;
new_info.mds_features = m->get_mds_features();
new_info.state = MDSMap::STATE_STANDBY;
new_info.state_seq = seq;
new_info.standby_for_rank = m->get_standby_for_rank();
new_info.standby_for_name = m->get_standby_for_name();
new_info.standby_for_fscid = m->get_standby_for_fscid();
new_info.standby_replay = m->get_standby_replay();
pending_fsmap.insert(new_info);
}
// Resolve standby_for_name to a rank
const MDSMap::mds_info_t &info = pending_fsmap.get_info_gid(gid);
if (!info.standby_for_name.empty()) {
const MDSMap::mds_info_t *leaderinfo = fsmap.find_by_name(
info.standby_for_name);
if (leaderinfo && (leaderinfo->rank >= 0)) {
auto fscid = pending_fsmap.mds_roles.at(leaderinfo->global_id);
auto fs = pending_fsmap.get_filesystem(fscid);
bool followable = fs->mds_map.is_followable(leaderinfo->rank);
pending_fsmap.modify_daemon(gid, [fscid, leaderinfo, followable](
MDSMap::mds_info_t *info) {
info->standby_for_rank = leaderinfo->rank;
info->standby_for_fscid = fscid;
});
}
}
// initialize the beacon timer
last_beacon[gid].stamp = ceph_clock_now(g_ceph_context);
last_beacon[gid].seq = seq;
// new incompat?
if (!pending_fsmap.compat.writeable(m->get_compat())) {
dout(10) << " fsmap " << pending_fsmap.compat
<< " can't write to new mds' " << m->get_compat()
<< ", updating fsmap and killing old mds's"
<< dendl;
pending_fsmap.update_compat(m->get_compat());
}
update_metadata(m->get_global_id(), m->get_sys_info());
} else {
// state update
const MDSMap::mds_info_t &info = pending_fsmap.get_info_gid(gid);
// Old MDS daemons don't mention that they're standby replay until
// after they've sent their boot beacon, so update this field.
if (info.standby_replay != m->get_standby_replay()) {
pending_fsmap.modify_daemon(info.global_id, [&m](
MDSMap::mds_info_t *i)
{
i->standby_replay = m->get_standby_replay();
});
}
if (info.state == MDSMap::STATE_STOPPING && state != MDSMap::STATE_STOPPED ) {
// we can't transition to any other states from STOPPING
dout(0) << "got beacon for MDS in STATE_STOPPING, ignoring requested state change"
<< dendl;
_note_beacon(m);
return true;
}
if (info.laggy()) {
dout(10) << "prepare_beacon clearing laggy flag on " << addr << dendl;
pending_fsmap.modify_daemon(info.global_id, [](MDSMap::mds_info_t *info)
{
info->clear_laggy();
}
);
}
dout(10) << "prepare_beacon mds." << info.rank
<< " " << ceph_mds_state_name(info.state)
<< " -> " << ceph_mds_state_name(state)
<< " standby_for_rank=" << m->get_standby_for_rank()
<< dendl;
if (state == MDSMap::STATE_STOPPED) {
auto erased = pending_fsmap.stop(gid);
erased.push_back(gid);
for (const auto &erased_gid : erased) {
last_beacon.erase(erased_gid);
if (pending_daemon_health.count(erased_gid)) {
pending_daemon_health.erase(erased_gid);
pending_daemon_health_rm.insert(erased_gid);
}
}
} else if (state == MDSMap::STATE_DAMAGED) {
if (!mon->osdmon()->is_writeable()) {
dout(4) << __func__ << ": DAMAGED from rank " << info.rank
<< " waiting for osdmon writeable to blacklist it" << dendl;
mon->osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op));
return false;
}
// Record this MDS rank as damaged, so that other daemons
// won't try to run it.
dout(4) << __func__ << ": marking rank "
<< info.rank << " damaged" << dendl;
utime_t until = ceph_clock_now(g_ceph_context);
until += g_conf->mds_blacklist_interval;
const auto blacklist_epoch = mon->osdmon()->blacklist(info.addr, until);
request_proposal(mon->osdmon());
pending_fsmap.damaged(gid, blacklist_epoch);
last_beacon.erase(gid);
// Respond to MDS, so that it knows it can continue to shut down
mon->send_reply(op,
new MMDSBeacon(
mon->monmap->fsid, m->get_global_id(),
m->get_name(), fsmap.get_epoch(), state, seq,
CEPH_FEATURES_SUPPORTED_DEFAULT));
} else if (state == MDSMap::STATE_DNE) {
if (!mon->osdmon()->is_writeable()) {
dout(4) << __func__ << ": DNE from rank " << info.rank
<< " waiting for osdmon writeable to blacklist it" << dendl;
mon->osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op));
return false;
}
fail_mds_gid(gid);
assert(mon->osdmon()->is_writeable());
request_proposal(mon->osdmon());
// Respond to MDS, so that it knows it can continue to shut down
mon->send_reply(op,
new MMDSBeacon(
mon->monmap->fsid, m->get_global_id(),
m->get_name(), fsmap.get_epoch(), state, seq,
CEPH_FEATURES_SUPPORTED_DEFAULT));
} else if (info.state == MDSMap::STATE_STANDBY && state != info.state) {
// Standby daemons should never modify their own
// state. Reject any attempts to do so.
derr << "standby " << gid << " attempted to change state to "
<< ceph_mds_state_name(state) << ", rejecting" << dendl;
return true;
} else if (info.state != MDSMap::STATE_STANDBY && state != info.state &&
!MDSMap::state_transition_valid(info.state, state)) {
// Validate state transitions for daemons that hold a rank
derr << "daemon " << gid << " (rank " << info.rank << ") "
<< "reported invalid state transition "
<< ceph_mds_state_name(info.state) << " -> "
<< ceph_mds_state_name(state) << dendl;
return true;
} else {
// Made it through special cases and validations, record the
// daemon's reported state to the FSMap.
pending_fsmap.modify_daemon(gid, [state, seq](MDSMap::mds_info_t *info) {
info->state = state;
info->state_seq = seq;
});
}
}
dout(7) << "prepare_beacon pending map now:" << dendl;
print_map(pending_fsmap);
wait_for_finished_proposal(op, new C_Updated(this, op));
return true;
}
bool MDSMonitor::prepare_offload_targets(MonOpRequestRef op)
{
op->mark_mdsmon_event(__func__);
MMDSLoadTargets *m = static_cast<MMDSLoadTargets*>(op->get_req());
mds_gid_t gid = m->global_id;
if (pending_fsmap.gid_has_rank(gid)) {
dout(10) << "prepare_offload_targets " << gid << " " << m->targets << dendl;
pending_fsmap.update_export_targets(gid, m->targets);
} else {
dout(10) << "prepare_offload_targets " << gid << " not in map" << dendl;
}
return true;
}
bool MDSMonitor::should_propose(double& delay)
{
// delegate to PaxosService to assess whether we should propose
return PaxosService::should_propose(delay);
}
void MDSMonitor::_updated(MonOpRequestRef op)
{
op->mark_mdsmon_event(__func__);
MMDSBeacon *m = static_cast<MMDSBeacon*>(op->get_req());
dout(10) << "_updated " << m->get_orig_source() << " " << *m << dendl;
mon->clog->info() << m->get_orig_source_inst() << " "
<< ceph_mds_state_name(m->get_state()) << "\n";
if (m->get_state() == MDSMap::STATE_STOPPED) {
// send the map manually (they're out of the map, so they won't get it automatic)
MDSMap null_map;
null_map.epoch = fsmap.epoch;
null_map.compat = fsmap.compat;
mon->send_reply(op, new MMDSMap(mon->monmap->fsid, &null_map));
} else {
mon->send_reply(op, new MMDSBeacon(mon->monmap->fsid,
m->get_global_id(),
m->get_name(),
fsmap.get_epoch(),
m->get_state(),
m->get_seq(),
CEPH_FEATURES_SUPPORTED_DEFAULT));
}
}
void MDSMonitor::on_active()
{
tick();
update_logger();
if (mon->is_leader())
mon->clog->info() << "fsmap " << fsmap << "\n";
}
void MDSMonitor::get_health(list<pair<health_status_t, string> >& summary,
list<pair<health_status_t, string> > *detail,
CephContext* cct) const
{
fsmap.get_health(summary, detail);
// For each MDS GID...
const auto info_map = fsmap.get_mds_info();
for (const auto &i : info_map) {
const auto &gid = i.first;
const auto &info = i.second;
// Decode MDSHealth
bufferlist bl;
mon->store->get(MDS_HEALTH_PREFIX, stringify(gid), bl);
if (!bl.length()) {
derr << "Missing health data for MDS " << gid << dendl;
continue;
}
MDSHealth health;
bufferlist::iterator bl_i = bl.begin();
health.decode(bl_i);
for (std::list<MDSHealthMetric>::iterator j = health.metrics.begin(); j != health.metrics.end(); ++j) {
int const rank = info.rank;
std::ostringstream message;
message << "mds" << rank << ": " << j->message;
summary.push_back(std::make_pair(j->sev, message.str()));
if (detail) {
// There is no way for us to clealy associate detail entries with summary entries (#7192), so
// we duplicate the summary message in the detail string and tag the metadata on.
std::ostringstream detail_message;
detail_message << message.str();
if (j->metadata.size()) {
detail_message << "(";
std::map<std::string, std::string>::iterator k = j->metadata.begin();
while (k != j->metadata.end()) {
detail_message << k->first << ": " << k->second;
if (boost::next(k) != j->metadata.end()) {
detail_message << ", ";
}
++k;
}
detail_message << ")";
}
detail->push_back(std::make_pair(j->sev, detail_message.str()));
}
}
}
}
void MDSMonitor::dump_info(Formatter *f)
{
f->open_object_section("fsmap");
fsmap.dump(f);
f->close_section();
f->dump_unsigned("mdsmap_first_committed", get_first_committed());
f->dump_unsigned("mdsmap_last_committed", get_last_committed());
}
class FileSystemCommandHandler
{
protected:
std::string prefix;
/**
* Parse true|yes|1 style boolean string from `bool_str`
* `result` must be non-null.
* `ss` will be populated with error message on error.
*
* @return 0 on success, else -EINVAL
*/
int parse_bool(
const std::string &bool_str,
bool *result,
std::ostream &ss)
{
assert(result != nullptr);
string interr;
int64_t n = strict_strtoll(bool_str.c_str(), 10, &interr);
if (bool_str == "false" || bool_str == "no"
|| (interr.length() == 0 && n == 0)) {
*result = false;
return 0;
} else if (bool_str == "true" || bool_str == "yes"
|| (interr.length() == 0 && n == 1)) {
*result = true;
return 0;
} else {
ss << "value must be false|no|0 or true|yes|1";
return -EINVAL;
}
}
/**
* Return 0 if the pool is suitable for use with CephFS, or
* in case of errors return a negative error code, and populate
* the passed stringstream with an explanation.
*/
int _check_pool(
OSDMap &osd_map,
const int64_t pool_id,
std::stringstream *ss) const
{
assert(ss != NULL);
const pg_pool_t *pool = osd_map.get_pg_pool(pool_id);
if (!pool) {
*ss << "pool id '" << pool_id << "' does not exist";
return -ENOENT;
}
const string& pool_name = osd_map.get_pool_name(pool_id);
if (pool->is_erasure()) {
// EC pools are only acceptable with a cache tier overlay
if (!pool->has_tiers() || !pool->has_read_tier() || !pool->has_write_tier()) {
*ss << "pool '" << pool_name << "' (id '" << pool_id << "')"
<< " is an erasure-code pool";
return -EINVAL;
}
// That cache tier overlay must be writeback, not readonly (it's the
// write operations like modify+truncate we care about support for)
const pg_pool_t *write_tier = osd_map.get_pg_pool(
pool->write_tier);
assert(write_tier != NULL); // OSDMonitor shouldn't allow DNE tier
if (write_tier->cache_mode == pg_pool_t::CACHEMODE_FORWARD
|| write_tier->cache_mode == pg_pool_t::CACHEMODE_READONLY) {
*ss << "EC pool '" << pool_name << "' has a write tier ("
<< osd_map.get_pool_name(pool->write_tier)
<< ") that is configured "
"to forward writes. Use a cache mode such as 'writeback' for "
"CephFS";
return -EINVAL;
}
}
if (pool->is_tier()) {
*ss << " pool '" << pool_name << "' (id '" << pool_id
<< "') is already in use as a cache tier.";
return -EINVAL;
}
// Nothing special about this pool, so it is permissible
return 0;
}
virtual std::string const &get_prefix() {return prefix;}
public:
FileSystemCommandHandler(const std::string &prefix_)
: prefix(prefix_)
{
}
virtual ~FileSystemCommandHandler()
{
}
bool can_handle(std::string const &prefix_)
{
return get_prefix() == prefix_;
}
virtual int handle(
Monitor *mon,
FSMap &fsmap,
MonOpRequestRef op,
map<string, cmd_vartype> &cmdmap,
std::stringstream &ss) = 0;
};
bool MDSMonitor::preprocess_command(MonOpRequestRef op)
{
op->mark_mdsmon_event(__func__);
MMonCommand *m = static_cast<MMonCommand*>(op->get_req());
int r = -1;
bufferlist rdata;
stringstream ss, ds;
map<string, cmd_vartype> cmdmap;
if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) {
// ss has reason for failure
string rs = ss.str();
mon->reply_command(op, -EINVAL, rs, rdata, get_last_committed());
return true;
}
string prefix;
cmd_getval(g_ceph_context, cmdmap, "prefix", prefix);
string format;
cmd_getval(g_ceph_context, cmdmap, "format", format, string("plain"));
boost::scoped_ptr<Formatter> f(Formatter::create(format));
MonSession *session = m->get_session();
if (!session) {
mon->reply_command(op, -EACCES, "access denied", rdata, get_last_committed());
return true;
}
if (prefix == "mds stat") {
if (f) {
f->open_object_section("mds_stat");
dump_info(f.get());
f->close_section();
f->flush(ds);
} else {
ds << fsmap;
}
r = 0;
} else if (prefix == "mds dump") {
int64_t epocharg;
epoch_t epoch;
FSMap *p = &fsmap;
if (cmd_getval(g_ceph_context, cmdmap, "epoch", epocharg)) {
epoch = epocharg;
bufferlist b;
int err = get_version(epoch, b);
if (err == -ENOENT) {
p = 0;
r = -ENOENT;
} else {
assert(err == 0);
assert(b.length());
p = new FSMap;
p->decode(b);
}
}
if (p) {
stringstream ds;
const MDSMap *mdsmap = nullptr;
MDSMap blank;
blank.epoch = fsmap.epoch;
if (fsmap.legacy_client_fscid != FS_CLUSTER_ID_NONE) {
mdsmap = &(fsmap.filesystems[fsmap.legacy_client_fscid]->mds_map);
} else {
mdsmap = ␣
}
if (f != NULL) {
f->open_object_section("mdsmap");
mdsmap->dump(f.get());
f->close_section();
f->flush(ds);
r = 0;
} else {
mdsmap->print(ds);
r = 0;
}
if (r == 0) {
rdata.append(ds);
ss << "dumped fsmap epoch " << p->get_epoch();
}
if (p != &fsmap) {