Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 Zabbix SIA

**

** 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.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

package memcached

​

import (

    "git.zabbix.com/ap/plugin-support/metric"

    "git.zabbix.com/ap/plugin-support/plugin"

    "git.zabbix.com/ap/plugin-support/uri"

)

​

// handlerFunc defines an interface must be implemented by handlers.

type handlerFunc func(conn MCClient, params map[string]string) (res interface{}, err error)

​

// getHandlerFunc returns a handlerFunc related to a given key.

func getHandlerFunc(key string) handlerFunc {

    switch key {

    case keyStats:

        return statsHandler // memcached.stats[[connString][,user][,password][,type]]

​

    case keyPing:

        return pingHandler // memcached.ping[[connString][,user][,password]]

​

    default:

        return nil

    }

}

​

const (

    keyPing  = "memcached.ping"

    keyStats = "memcached.stats"

)

​

// https://github.com/memcached/memcached/blob/master/sasl_defs.c#L26

var maxEntryLen = 252

var uriDefaults = &uri.Defaults{Scheme: "tcp", Port: "11211"}

​

// Common params: [URI|Session][,User][,Password]

var (

    paramURI = metric.NewConnParam("URI", "URI to connect or session name.").

            WithDefault(uriDefaults.Scheme + "://localhost:" + uriDefaults.Port).WithSession().

            WithValidator(uri.URIValidator{Defaults: uriDefaults, AllowedSchemes: []string{"tcp", "unix"}})

    paramUser     = metric.NewConnParam("User", "Memcached user.").WithDefault("")

    paramPassword = metric.NewConnParam("Password", "User's password.").WithDefault("")

)

​

var metrics = metric.MetricSet{

    keyPing: metric.New("Test if connection is alive or not.",

        []*metric.Param{paramURI, paramUser, paramPassword}, false),

​

    keyStats: metric.New("Returns output of stats command.",

        []*metric.Param{paramURI, paramUser, paramPassword,

            metric.NewParam("Type", "One of supported stat types: items, sizes, slabs and settings. "+

                "Empty by default (returns general statistics).").WithDefault(statsTypeGeneral).

                WithValidator(metric.SetValidator{

                    Set:             []string{statsTypeGeneral, statsTypeItems, statsTypeSizes, statsTypeSlabs, statsTypeSettings},

                    CaseInsensitive: true,

                }),

        }, false),

}

​

func init() {

    plugin.RegisterMetrics(&impl, pluginName, metrics.List()...)

}