Zabbix

/*

** 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 kernel

​

import (

    "golang.zabbix.com/sdk/errs"

    "golang.zabbix.com/sdk/plugin"

    "golang.zabbix.com/sdk/std"

    "golang.zabbix.com/sdk/zbxerr"

)

​

var (

    impl  Plugin

    stdOs std.Os

)

​

// Plugin -

type Plugin struct {

    plugin.Base

}

​

func init() {

    stdOs = std.NewOs()

    err := plugin.RegisterMetrics(

        &impl, "Kernel",

        "kernel.maxproc", "Returns maximum number of processes supported by OS.",

        "kernel.maxfiles", "Returns maximum number of opened files supported by OS.",

        "kernel.openfiles", "Returns number of currently open file descriptors.",

    )

    if err != nil {

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

    }

}

​

// Export -

func (p *Plugin) Export(key string, params []string, ctx plugin.ContextProvider) (result interface{}, err error) {

    if len(params) > 0 {

        return nil, zbxerr.ErrorTooManyParameters

    }

​

    switch key {

    case "kernel.maxproc", "kernel.maxfiles", "kernel.openfiles":

        return getFirstNum(key)

    default:

        /* SHOULD_NEVER_HAPPEN */

        return 0, plugin.UnsupportedMetricError

    }

}