1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2016 John Spray <john.spray@redhat.com>
8 * This is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License version 2.1, as published by the Free Software
11 * Foundation. See file COPYING.
14 #ifndef CEPH_MGRMONITOR_H
15 #define CEPH_MGRMONITOR_H
20 #include "include/Context.h"
22 #include "PaxosService.h"
23 #include "MonCommand.h"
25 class MgrMonitor: public PaxosService
29 bool ever_had_active_mgr = false;
31 std::map<std::string, bufferlist> pending_metadata;
32 std::set<std::string> pending_metadata_rm;
34 utime_t first_seen_inactive;
36 std::map<uint64_t, ceph::coarse_mono_clock::time_point> last_beacon;
39 * If a standby is available, make it active, given that
40 * there is currently no active daemon.
42 * @return true if a standby was promoted
44 bool promote_standby();
48 * Remove this gid from the list of standbys. By default,
49 * also remove metadata (i.e. forget the daemon entirely).
51 * Set `drop_meta` to false if you would like to keep
52 * the daemon's metadata, for example if you're dropping
53 * it as a standby before reinstating it as the active daemon.
55 void drop_standby(uint64_t gid, bool drop_meta=true);
57 Context *digest_event = nullptr;
60 bool check_caps(MonOpRequestRef op, const uuid_d& fsid);
62 health_status_t should_warn_about_mgr_down();
64 // Command descriptions we've learned from the active mgr
65 std::vector<MonCommand> command_descs;
66 std::vector<MonCommand> pending_command_descs;
69 MgrMonitor(Monitor *mn, Paxos *p, const string& service_name)
70 : PaxosService(mn, p, service_name)
72 ~MgrMonitor() override {}
75 void on_shutdown() override;
77 const MgrMap &get_map() const { return map; }
79 bool in_use() const { return map.epoch > 0; }
81 void create_initial() override;
82 void get_store_prefixes(std::set<string>& s) override;
83 void update_from_paxos(bool *need_bootstrap) override;
84 void create_pending() override;
85 void encode_pending(MonitorDBStore::TransactionRef t) override;
87 bool preprocess_query(MonOpRequestRef op) override;
88 bool prepare_update(MonOpRequestRef op) override;
90 bool preprocess_command(MonOpRequestRef op);
91 bool prepare_command(MonOpRequestRef op);
93 void encode_full(MonitorDBStore::TransactionRef t) override { }
95 bool preprocess_beacon(MonOpRequestRef op);
96 bool prepare_beacon(MonOpRequestRef op);
98 void check_sub(Subscription *sub);
102 void on_active() override;
103 void on_restart() override;
105 void get_health(list<pair<health_status_t,string> >& summary,
106 list<pair<health_status_t,string> > *detail,
107 CephContext *cct) const override;
108 void tick() override;
110 void print_summary(Formatter *f, std::ostream *ss) const;
112 const std::vector<MonCommand> &get_command_descs() const;
114 int load_metadata(const string& name, std::map<string, string>& m,
116 int dump_metadata(const string& name, Formatter *f, ostream *err);
117 void count_metadata(const string& field, Formatter *f);
118 void count_metadata(const string& field, std::map<string,int> *out);
120 friend class C_Updated;
122 // When did the mon last call into our tick() method? Used for detecting
123 // when the mon was not updating us for some period (e.g. during slow
124 // election) to reset last_beacon timeouts
125 ceph::coarse_mono_clock::time_point last_tick;