ceph/src/mon/MonmapMonitor.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2009 Sage Weil <sage@newdream.net>
   7  *
   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.
  12  *
  13  */
  14
  15 /*
  16  * The Monmap Monitor is used to track the monitors in the cluster.
  17  */
  18
  19 #ifndef CEPH_MONMAPMONITOR_H
  20 #define CEPH_MONMAPMONITOR_H
  21
  22 #include <map>
  23 #include <set>
  24
  25 using namespace std;
  26
  27 #include "include/types.h"
  28 #include "msg/Messenger.h"
  29
  30 #include "PaxosService.h"
  31 #include "MonMap.h"
  32 #include "MonitorDBStore.h"
  33
  34 class MMonGetMap;
  35 class MMonMap;
  36 class MMonCommand;
  37 class MMonJoin;
  38
  39 class MonmapMonitor : public PaxosService {
  40  public:
  41   MonmapMonitor(Monitor *mn, Paxos *p, const string& service_name)
  42     : PaxosService(mn, p, service_name)
  43   {
  44   }
  45   MonMap pending_map; //the pending map awaiting passage
  46
  47   void create_initial() override;
  48
  49   void update_from_paxos(bool *need_bootstrap) override;
  50
  51   void create_pending() override;
  52
  53   void encode_pending(MonitorDBStore::TransactionRef t) override;
  54   // we always encode the full map; we have no use for full versions
  55   void encode_full(MonitorDBStore::TransactionRef t) override { }
  56
  57   void on_active() override;
  58   void apply_mon_features(const mon_feature_t& features);
  59
  60   void dump_info(Formatter *f);
  61
  62   bool preprocess_query(MonOpRequestRef op) override;
  63   bool prepare_update(MonOpRequestRef op) override;
  64
  65   bool preprocess_join(MonOpRequestRef op);
  66   bool prepare_join(MonOpRequestRef op);
  67
  68   bool preprocess_command(MonOpRequestRef op);
  69   bool prepare_command(MonOpRequestRef op);
  70
  71   void get_health(list<pair<health_status_t,string> >& summary,
  72                   list<pair<health_status_t,string> > *detail,
  73                   CephContext *cct) const override;
  74
  75   int get_monmap(bufferlist &bl);
  76
  77   /*
  78    * Since monitors are pretty
  79    * important, this implementation will just write 0.0.
  80    */
  81   bool should_propose(double& delay) override;
  82
  83   void check_sub(Subscription *sub);
  84
  85 private:
  86   void check_subs();
  87
  88 private:
  89   bufferlist monmap_bl;
  90 };
  91
  92
  93 #endif