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 version_t
get_trim_to() override
;
83 void create_initial() override
;
84 void get_store_prefixes(std::set
<string
>& s
) override
;
85 void update_from_paxos(bool *need_bootstrap
) override
;
86 void create_pending() override
;
87 void encode_pending(MonitorDBStore::TransactionRef t
) override
;
89 bool preprocess_query(MonOpRequestRef op
) override
;
90 bool prepare_update(MonOpRequestRef op
) override
;
92 bool preprocess_command(MonOpRequestRef op
);
93 bool prepare_command(MonOpRequestRef op
);
95 void encode_full(MonitorDBStore::TransactionRef t
) override
{ }
97 bool preprocess_beacon(MonOpRequestRef op
);
98 bool prepare_beacon(MonOpRequestRef op
);
100 void check_sub(Subscription
*sub
);
104 void on_active() override
;
105 void on_restart() override
;
107 void get_health(list
<pair
<health_status_t
,string
> >& summary
,
108 list
<pair
<health_status_t
,string
> > *detail
,
109 CephContext
*cct
) const override
;
110 void tick() override
;
112 void print_summary(Formatter
*f
, std::ostream
*ss
) const;
114 const std::vector
<MonCommand
> &get_command_descs() const;
116 int load_metadata(const string
& name
, std::map
<string
, string
>& m
,
118 int dump_metadata(const string
& name
, Formatter
*f
, ostream
*err
);
119 void count_metadata(const string
& field
, Formatter
*f
);
120 void count_metadata(const string
& field
, std::map
<string
,int> *out
);
122 friend class C_Updated
;
124 // When did the mon last call into our tick() method? Used for detecting
125 // when the mon was not updating us for some period (e.g. during slow
126 // election) to reset last_beacon timeouts
127 ceph::coarse_mono_clock::time_point last_tick
;