mirror of
https://github.com/ceph/ceph
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9213a23f14
git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@1138 29311d96-e01e-0410-9327-a35deaab8ce9
98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef __HOSTMONITOR_H
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#define __HOSTMONITOR_H
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#include <time.h>
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#include <map>
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#include <set>
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using namespace std;
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#include "include/Context.h"
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#include "msg/Message.h"
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class Message;
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class Messenger;
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typedef struct {
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time_t last_heard_from;
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time_t last_pinged;
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int num_heartbeats_missed;
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} monitor_rec_t;
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class HostMonitor {
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Messenger *messenger;
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string whoami;
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// hosts i monitor
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set<entity_name_t> hosts;
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// who i tell when they fail
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set<entity_name_t> notify;
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int notify_port;
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// their status
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map<entity_name_t,monitor_rec_t> status;
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set<entity_name_t> inflight_pings; // pings we sent that haven't replied yet
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set<entity_name_t> unacked_failures; // failed hosts that haven't been acked yet.
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set<entity_name_t> acked_failures; // these failures have been acked.
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float heartbeat_interval; // how often to do a heartbeat
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float max_ping_time; // how long before it's a miss
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int max_heartbeat_misses; // how many misses before i tell
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float notify_retry_interval; // how often to retry failure notification
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public:
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set<Context*> pending_events;
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private:
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void schedule_heartbeat();
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public:
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HostMonitor(Messenger *m, string& whoami) {
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this->messenger = m;
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this->whoami = whoami;
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notify_port = 0;
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}
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set<entity_name_t>& get_hosts() { return hosts; }
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set<entity_name_t>& get_notify() { return notify; }
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void set_notify_port(int p) { notify_port = p; }
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void remove_host(entity_name_t h) {
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hosts.erase(h);
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status.erase(h);
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unacked_failures.erase(h);
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acked_failures.erase(h);
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}
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void init();
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void shutdown();
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void host_is_alive(entity_name_t who);
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void proc_message(Message *m);
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void handle_ping_ack(class MPingAck *m);
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void handle_failure_ack(class MFailureAck *m);
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void initiate_heartbeat();
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void check_heartbeat();
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};
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#endif
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