Redis Munin

A set of munin scripts to monitor redis

Installation

1. copy the file in /usr/share/munin/plugins/

2. make a link with the parameters you want in /etc/munin/plugins/

    ln -s /usr/share/munin/plugins/redis_memory_ /etc/munin/plugins/redis_memory_127_0_0_1_6379
   

3. make sure there's a gem redis available for munin user

    su -s /bin/bash munin
    gem list
   

   if redis is not available install it with:

    gem install redis
   

Usage

Parameters

The parameters are in the filename in the format _IP_PORT, where IP is the 4 part ipv4 separated by '_'. They can also be set in YAML via a file in the munin plugin-conf.d named redis.conf.

Valid link name

Note the ending '_' when no ip or port or when not using a config file:

• redis_command_
• redis_command_1_2_3_4_
• redis_command_1_2_3_4_port

ip will default to 127.0.0.1

port will default to 6379

Scripts

• redis_change_since_last_save_

  Number of changes since last save

• redis_databases_

  List all DBs with number of keys and expire

• redis_memory_

  Used memory

• redis_total_commands_

  Total commands

• redis_total_connections_

  Total connections

• redis_users_

  Current clients

• resque_failed_

  COUNTER for failures

  Need resque-web

  TODO use driver or netcat or telnet

• resque_workers_

  % of working workers

  Need resque-web

  TODO use driver or netcat or telnet

• resque_queues_

  COUNTER for in / out jobs per queue. This ones needs some hooks to create the stats:

    def self.after_enqueue(*job_args)
        Resque::Stat.incr(@queue.to_s + ":pushed")
    end
  
    def self.after_perform(*job_args)
        Resque::Stat.incr(@queue.to_s + ":finished")
    end
  

  https://github.com/defunkt/resque/blob/master/docs/HOOKS.md

Changelog

• added keyspace hit/miss statistics (** Christian Parpart [email protected] **)
• fixed redis_databases_ labels (thanks japerk)