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/* -*- C++ -*-
* Copyright (c) 2013-2014 Red Hat.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef PMMGR_H
#define PMMGR_H
extern "C" {
#include "pmapi.h"
}
#include <string>
#include <vector>
#include <set>
#include <map>
#include <stdexcept>
#include <iostream>
typedef std::string pcp_context_spec; // pmNewContext PM_CONTEXT_HOST parameter
typedef std::string pmmgr_hostid; // a unique id for a pmcd
// Instances of pmmgr_configurable represent a configurable object,
// which reads one or more lines of djb-style directories.
class pmmgr_configurable
{
protected:
pmmgr_configurable(const std::string& dir);
virtual ~pmmgr_configurable() {}
std::vector<std::string> get_config_multi(const std::string&) const;
std::string get_config_single(const std::string&) const;
bool get_config_exists(const std::string&) const;
// private: maybe?
std::string config_directory;
std::ostream& timestamp(std::ostream&);
int wrap_system(const std::string& cmd);
};
// Instances of pmmgr_daemon represent a possibly-live, restartable daemon.
class pmmgr_daemon: public pmmgr_configurable
{
public:
pmmgr_daemon(const std::string& config_directory,
const pmmgr_hostid& hostid, const pcp_context_spec& spec);
virtual ~pmmgr_daemon();
void poll();
protected:
pmmgr_hostid hostid;
pcp_context_spec spec;
int pid;
time_t last_restart_attempt;
virtual std::string daemon_command_line() = 0;
};
class pmmgr_pmlogger_daemon: public pmmgr_daemon
{
public:
pmmgr_pmlogger_daemon(const std::string& config_directory,
const pmmgr_hostid& hostid, const pcp_context_spec& spec);
protected:
std::string daemon_command_line();
};
class pmmgr_pmie_daemon: public pmmgr_daemon
{
public:
pmmgr_pmie_daemon(const std::string& config_directory,
const pmmgr_hostid& hostid, const pcp_context_spec& spec);
protected:
std::string daemon_command_line();
};
// An instance of a pmmgr_job_spec represents a pmmgr
// configuration item to monitor some set of pcp target patterns
// (which collectively map to a varying set of pmcd's), and a
// corresponding set of daemons to keep running for each of them.
//
// The pmcds are identified by a configurable algorithm that collects
// site-specific metrics into a single string, which is then sanitized
// to make it typeable, portable, useful as a directory name.
//
// It is configured from a djb-style control directory with files containing
// 100% pure content. Multiple values within the files, where permitted,
// are newline-separated.
class pmmgr_job_spec: pmmgr_configurable
{
public:
pmmgr_job_spec(const std::string& config_directory);
~pmmgr_job_spec(); // shut down all daemons
void poll(); // check targets, daemons
private:
std::map<std::string,pmMetricSpec*> parsed_metric_cache;
pmMetricSpec* parse_metric_spec(const std::string&);
pmmgr_hostid compute_hostid (const pcp_context_spec&);
std::map<pmmgr_hostid,pcp_context_spec> known_targets;
void note_new_hostid(const pmmgr_hostid&, const pcp_context_spec&);
void note_dead_hostid(const pmmgr_hostid&);
std::multimap<pmmgr_hostid,pmmgr_daemon*> daemons;
};
#endif
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