+++ /dev/null
-// -*- 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) 2016 John Spray <john.spray@redhat.com>
- *
- * 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.
- */
-
-#ifndef DAEMON_STATE_H_
-#define DAEMON_STATE_H_
-
-#include <map>
-#include <string>
-#include <memory>
-#include <set>
-#include <boost/circular_buffer.hpp>
-
-#include "common/RWLock.h"
-
-#include "msg/msg_types.h"
-
-// For PerfCounterType
-#include "messages/MMgrReport.h"
-
-
-// Unique reference to a daemon within a cluster
-typedef std::pair<std::string, std::string> DaemonKey;
-
-// An instance of a performance counter type, within
-// a particular daemon.
-class PerfCounterInstance
-{
- class DataPoint
- {
- public:
- utime_t t;
- uint64_t v;
- DataPoint(utime_t t_, uint64_t v_)
- : t(t_), v(v_)
- {}
- };
-
- boost::circular_buffer<DataPoint> buffer;
- uint64_t get_current() const;
-
- public:
- const boost::circular_buffer<DataPoint> & get_data() const
- {
- return buffer;
- }
- void push(utime_t t, uint64_t const &v);
- PerfCounterInstance()
- : buffer(20) {}
-};
-
-
-typedef std::map<std::string, PerfCounterType> PerfCounterTypes;
-
-// Performance counters for one daemon
-class DaemonPerfCounters
-{
- public:
- // The record of perf stat types, shared between daemons
- PerfCounterTypes &types;
-
- DaemonPerfCounters(PerfCounterTypes &types_)
- : types(types_)
- {}
-
- std::map<std::string, PerfCounterInstance> instances;
-
- void update(MMgrReport *report);
-
- void clear()
- {
- instances.clear();
- }
-};
-
-// The state that we store about one daemon
-class DaemonState
-{
- public:
- Mutex lock = {"DaemonState::lock"};
-
- DaemonKey key;
-
- // The hostname where daemon was last seen running (extracted
- // from the metadata)
- std::string hostname;
-
- // The metadata (hostname, version, etc) sent from the daemon
- std::map<std::string, std::string> metadata;
-
- // Ephemeral state
- bool service_daemon = false;
- utime_t service_status_stamp;
- std::map<std::string, std::string> service_status;
- utime_t last_service_beacon;
-
- // The perf counters received in MMgrReport messages
- DaemonPerfCounters perf_counters;
-
- DaemonState(PerfCounterTypes &types_)
- : perf_counters(types_)
- {
- }
-};
-
-typedef std::shared_ptr<DaemonState> DaemonStatePtr;
-typedef std::map<DaemonKey, DaemonStatePtr> DaemonStateCollection;
-
-
-
-
-/**
- * Fuse the collection of per-daemon metadata from Ceph into
- * a view that can be queried by service type, ID or also
- * by server (aka fqdn).
- */
-class DaemonStateIndex
-{
- private:
- mutable RWLock lock = {"DaemonStateIndex", true, true, true};
-
- std::map<std::string, DaemonStateCollection> by_server;
- DaemonStateCollection all;
- std::set<DaemonKey> updating;
-
- void _erase(const DaemonKey& dmk);
-
- public:
- DaemonStateIndex() {}
-
- // FIXME: shouldn't really be public, maybe construct DaemonState
- // objects internally to avoid this.
- PerfCounterTypes types;
-
- void insert(DaemonStatePtr dm);
- bool exists(const DaemonKey &key) const;
- DaemonStatePtr get(const DaemonKey &key);
-
- // Note that these return by value rather than reference to avoid
- // callers needing to stay in lock while using result. Callers must
- // still take the individual DaemonState::lock on each entry though.
- DaemonStateCollection get_by_server(const std::string &hostname) const;
- DaemonStateCollection get_by_service(const std::string &svc_name) const;
- DaemonStateCollection get_all() const {return all;}
-
- template<typename Callback, typename...Args>
- auto with_daemons_by_server(Callback&& cb, Args&&... args) const ->
- decltype(cb(by_server, std::forward<Args>(args)...)) {
- RWLock::RLocker l(lock);
-
- return std::forward<Callback>(cb)(by_server, std::forward<Args>(args)...);
- }
-
- void notify_updating(const DaemonKey &k) {
- RWLock::WLocker l(lock);
- updating.insert(k);
- }
- void clear_updating(const DaemonKey &k) {
- RWLock::WLocker l(lock);
- updating.erase(k);
- }
- bool is_updating(const DaemonKey &k) {
- RWLock::RLocker l(lock);
- return updating.count(k) > 0;
- }
-
- /**
- * Remove state for all daemons of this type whose names are
- * not present in `names_exist`. Use this function when you have
- * a cluster map and want to ensure that anything absent in the map
- * is also absent in this class.
- */
- void cull(const std::string& svc_name,
- const std::set<std::string>& names_exist);
-};
-
-#endif
-
Code Review / stor4nfv.git / blobdiff