ceph/src/mgr/MgrStandby.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) 2016 John Spray <john.spray@redhat.com>
   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 #ifndef MGR_STANDBY_H_
  16 #define MGR_STANDBY_H_
  17
  18 #include "auth/Auth.h"
  19 #include "common/async/context_pool.h"
  20 #include "common/Finisher.h"
  21 #include "common/Timer.h"
  22 #include "common/LogClient.h"
  23
  24 #include "client/Client.h"
  25 #include "mon/MonClient.h"
  26 #include "osdc/Objecter.h"
  27 #include "PyModuleRegistry.h"
  28 #include "MgrClient.h"
  29
  30 class MMgrMap;
  31 class Mgr;
  32 class PyModuleConfig;
  33
  34 class MgrStandby : public Dispatcher,
  35                    public md_config_obs_t {
  36 public:
  37   // config observer bits
  38   const char** get_tracked_conf_keys() const override;
  39   void handle_conf_change(const ConfigProxy& conf,
  40                           const std::set <std::string> &changed) override;
  41
  42 protected:
  43   ceph::async::io_context_pool poolctx;
  44   MonClient monc;
  45   std::unique_ptr<Messenger> client_messenger;
  46   Objecter objecter;
  47   Client client;
  48
  49   MgrClient mgrc;
  50
  51   LogClient log_client;
  52   LogChannelRef clog, audit_clog;
  53
  54   ceph::mutex lock = ceph::make_mutex("MgrStandby::lock");
  55   Finisher finisher;
  56   SafeTimer timer;
  57
  58   PyModuleRegistry py_module_registry;
  59   std::shared_ptr<Mgr> active_mgr;
  60
  61   int orig_argc;
  62   const char **orig_argv;
  63
  64   std::string state_str();
  65
  66   void handle_mgr_map(ceph::ref_t<MMgrMap> m);
  67   void _update_log_config();
  68   void send_beacon();
  69
  70   bool available_in_map;
  71
  72 public:
  73   MgrStandby(int argc, const char **argv);
  74   ~MgrStandby() override;
  75
  76   bool ms_dispatch2(const ceph::ref_t<Message>& m) override;
  77   bool ms_handle_reset(Connection *con) override { return false; }
  78   void ms_handle_remote_reset(Connection *con) override {}
  79   bool ms_handle_refused(Connection *con) override;
  80
  81   int init();
  82   void shutdown();
  83   void respawn();
  84   int main(std::vector<const char *> args);
  85   void tick();
  86 };
  87
  88 #endif
  89