Zabbix

//go:build linux

// +build linux

​

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

package proc

​

/*

#include <unistd.h>

*/

import "C"

​

import (

    "encoding/json"

    "errors"

    "fmt"

    "math"

    "os/user"

    "regexp"

    "strconv"

    "sync"

    "time"

​

    "golang.zabbix.com/agent2/pkg/procfs"

    "golang.zabbix.com/sdk/errs"

    "golang.zabbix.com/sdk/log"

    "golang.zabbix.com/sdk/plugin"

)

​

const (

    maxInactivityPeriod = time.Hour * 25

    maxHistory          = 60*15 + 1

)

​

// Plugin -

type Plugin struct {

    plugin.Base

    queries map[procQuery]*cpuUtilStats

    mutex   sync.Mutex

    scanid  uint64

    stats   map[int64]*procStat

}

​

type PluginExport struct {

    plugin.Base

}

​

var impl Plugin = Plugin{

    stats:   make(map[int64]*procStat),

    queries: make(map[procQuery]*cpuUtilStats),

}

​

var implExport PluginExport = PluginExport{}

​

type historyIndex int

​

func init() {

    err := plugin.RegisterMetrics(&impl, "Proc", "proc.cpu.util", "Process CPU utilization percentage.")

    if err != nil {

        panic(errs.Wrap(err, "failed to register metrics"))

    }

​

    err = plugin.RegisterMetrics(

        &implExport, "ProcExporter",

        "proc.mem", "Process memory utilization values.",

        "proc.num", "The number of processes.",

        "proc.get", "List of OS processes with statistics.",

    )

    if err != nil {

        panic(errs.Wrap(err, "failed to register metrics"))

    }

}

​

func (h historyIndex) inc() historyIndex {

    h++

    if h == maxHistory {

        h = 0

    }

    return h