当在生产环境下使用某种服务时，相应的监控措施也应当完善起来，来检测服务是否正常和获取相关信息是很有必要的。

下面来说说使用nagios-plugins-rabbitmq来监控消息分发队列服务rabbitmq。目前提供6种检测类型：

1. check_rabbitmq_aliveness 使用/api/aliveness-test API来发送/接收消息。

2. check_rabbitmq_server 使用/api/nodes API来获取rabbitmq服务器节点的资源使用情况。

3. check_rabbitmq_objects 使用多种API来计算统计服务器上的各种对象实例。包括vhosts、exchanges、bindings、queues 、channels。

4. check_rabbitmq_overview 使用/api/overview API来收集pending、ready、unacknowledged消息。

5. check_rabbitmq_queue 使用 /api/queue API来收集pending、ready、unacknowledged消息和统计一个给定的队列的消费者的数量。

6. check_rabbitmq_watermark 使用/api/nodes API来确定mem_alarm是否设置为true。

1. 安装Nagios::Plugin perl模块

nagios-plugins-rabbitmq插件是以perl语言写的，需要安装Nagios::Plugin perl包。否则会报如下错误：

Can't locate Nagios/Plugin.pm in @INC (@INC contains: /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/5.8.8 .) at ./check_rabbitmq_server line 12.

我这里使用cpanm来安装，参见《使用cpanm安装perl相关模块》。

# cpanm Nagios::Plugin
Building and testing Nagios-Plugin-0.36 ... OK
Successfully installed Nagios-Plugin-0.36
39 distributions installed
提示上面的信息说明安装成功。

大家也可以自己下载源码包进行编译安装。下载地址：http://search.cpan.org/CPAN/authors/id/T/TO/TONVOON/Nagios-Plugin-0.36.tar.gz

步骤如下：

# wget http://search.cpan.org/CPAN/authors/id/T/TO/TONVOON/Nagios-Plugin-0.36.tar.gz
# tar xvfz Nagios-Plugin-0.36.tar.gz
# cd Nagios-Plugin-0.36
# perl Makefile.PL
# make
# make install

2. 安装依赖模块

check_rabbitmq_* 如能正常使用，还需要安装下面依赖模块。

# cpanm LWP JSON

否则，会报如下错误

Can't locate LWP/UserAgent.pm in @INC
Can't locate JSON.pm in @INC

3. 下载nagios-plugins-rabbitmq

# cd /usr/local/nagios/libexec/
# wget --no-check-certificate https://github.com/jamesc/nagios-plugins-rabbitmq/archive/master.zip
# unzip master 
# mv nagios-plugins-rabbitmq-master nagios-plugins-rabbitmq
# chown -R nagios.nagios nagios-plugins-rabbitmq/

4. 举例

# ./check_rabbitmq_aliveness -H 10.1.155.139 --port=15672 -u 'nagioscheck' -p 'www.ttlsa.com' 
RABBITMQ_ALIVENESS OK - vhost: /
# ./check_rabbitmq_overview -H 10.1.155.139 --port=15672 -u 'nagioscheck' -p 'www.ttlsa.com'
RABBITMQ_OVERVIEW OK - messages OK (2) messages_ready OK (2) messages_unacknowledged OK (0) | messages=2;; messages_ready=2;; messages_unacknowledged=0;;
# ./check_rabbitmq_queue -H 10.1.155.139 --port=15672 -u 'nagioscheck' -p 'www.ttlsa.com' --queue=aliveness-test
RABBITMQ_QUEUE OK - messages OK (0) messages_ready OK (0) messages_unacknowledged OK (0) consumers OK (0) | messages=0;; messages_ready=0;; messages_unacknowledged=0;; consumers=0;;
# ./check_rabbitmq_objects -H 10.1.155.139 --port=15672 -u 'nagioscheck' -p 'www.ttlsa.com'
RABBITMQ_OBJECTS OK - Gathered Object Counts | vhost=1;; exchange=15;; binding=2;; queue=1;; channel=0;;

5. 定义nagios command

# vim /usr/local/nagios/etc/objects/commands.cfg  
define command{
	command_name check_rabbitmq_aliveness      
	command_line $USER1$/nagios-plugins-rabbitmq/scripts/check_rabbitmq_aliveness  -H $ARG1$ --port=$ARG2$ -u $ARG3$ -p $ARG4$
}

define command{
	command_name check_rabbitmq_overview      
	command_line $USER1$/nagios-plugins-rabbitmq/scripts/check_rabbitmq_overview  -H $ARG1$ --port=$ARG2$ -u $ARG3$ -p $ARG4$
}

define command{
	command_name check_rabbitmq_queue      
	command_line $USER1$/nagios-plugins-rabbitmq/scripts/check_rabbitmq_queue  -H $ARG1$ --port=$ARG2$ -u $ARG3$ -p $ARG4$ --queue $ARG5$
}

define command{
	command_name check_rabbitmq_objects      
	command_line $USER1$/nagios-plugins-rabbitmq/scripts/check_rabbitmq_objects  -H $ARG1$ --port=$ARG2$ -u $ARG3$
}

用户名、密码可以定义到/usr/local/nagios/etc/resource.cfg 文件中，免得每次都要指定。

6. 创建rabbitmq监控项

define service{
    use                     generic-service
    host_name               121.207.22.33
    service_description     check_rabbitmq_aliveness
    normal_check_interval   2
    contact_groups          admin_4
    check_command           check_rabbitmq_aliveness!10.1.22.33!15672!nagioscheck!www.ttlsa.com
    }

define service{
    use                     generic-service
    host_name               121.207.22.33
    service_description     check_rabbitmq_queue
    normal_check_interval   2
    contact_groups          admin_4
    check_command           check_rabbitmq_queue!10.1.22.33!15672!nagioscheck!www.ttlsa.com!aliveness-test
    }

按照自己的需求，添加command和监控项。