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 redis

​

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 redisClient, 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 keyConfig:

        return configHandler

​

    case keyInfo:

        return infoHandler

​

    case keyPing:

        return pingHandler

​

    case keySlowlog:

        return slowlogHandler

​

    default:

        return nil

    }

}

​

const (

    keyConfig  = "redis.config"

    keyInfo    = "redis.info"

    keyPing    = "redis.ping"

    keySlowlog = "redis.slowlog.count"

)

​

var maxAuthPassLen = 512

var uriDefaults = &uri.Defaults{Scheme: "tcp", Port: "6379"}

​

// 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"}})

    paramPassword = metric.NewConnParam("Password", "Redis password.").WithDefault("").

            WithValidator(metric.LenValidator{Max: &maxAuthPassLen})

)

​

var metrics = metric.MetricSet{

    keyConfig: metric.New("Returns configuration parameters of Redis server.",

        []*metric.Param{paramURI, paramPassword,

            metric.NewParam("Pattern", "Glob-style pattern to filter configuration parameters.").

                WithDefault("*"),

        }, false),

​

    keyInfo: metric.New("Returns output of INFO command.",

        []*metric.Param{paramURI, paramPassword,

            metric.NewParam("Section", "Section of information to return.").WithDefault("default"),

        }, false),

​

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

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

​

    keySlowlog: metric.New("Returns the number of slow log entries since Redis has been started.",

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

}

​

func init() {

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

}