前言：
以前做了cacti上展示redis性能报表图，可以看到redis的性能变化趋势图，
但是还缺了实时报警通知的功能，现在补上这一环节。在redis服务瓶颈或者异常时候即使报警通知，方便dba第一时间处理维护。
1，
下载redis监控插件
Redis已经在服务器安装好了，所以直接可以进行监控，redis集群安装请参考：http://blog.itpub.net/26230597/viewspace-1145831/，下载地址为：http://download.csdn.net/detail/mchdba/8023351，有2个版本，一个是perl脚本写成的，一个是php脚本写成的，可以任意选择一个，这里选择的是perl脚本。
2，赋予执行权限
将check_redis.php和check_redis.pl复制到/usr/lib/nagios/plugins/目录，然后赋予执行权限，
[root@wgq_41 plugins]# cd /usr/lib/nagios/plugins/
[root@wgq_41 plugins]# chown -R nagios.nagios check_redis.*
[root@wgq_41 plugins]# chmod 750 check_redis.*
3，定义监控命令
[root@wgq objects] vim /usr/local/nagios/etc/objects/commands.cfg
# add by tim on 20141010,for redis
# check redis
define command {
command_name check_redis
command_line /usr/lib/nagios/plugins/check_redis.pl -H $HOSTADDRESS$ -p $ARG1$ -a $ARG2$ -w $ARG3$ -c $ARG4$ -f
}
4，定义redis监控主机
[root@wgq etc]# vim /usr/local/nagios/etc/hosts.cfg
# No.018，redis master server
define host{
use linux-server
host_name cache-1
alias cache-1
address 10.xxx.3.x0
check_command check-host-alive
max_check_attempts 5
check_period 24x7
contact_groups ops
notification_interval 30
notification_period 24x7
notification_options d,u,r
}
# No.020 cache-3 redis slave server
define host{
use linux-server
host_name cache-3
alias cache-3
address 10.xx.3.x2
check_command check-host-alive
max_check_attempts 5
check_period 24x7
contact_groups ops
notification_interval 30
notification_period 24x7
notification_options d,u,r
}
5，定义redis监控主机组
define hostgroup {
hostgroup_name Redis_Servers
alias Redisservices
members cache-1,cache-2
}
6，定义redis监控服务选项
[root@wgq objects]# vim /usr/local/nagios/etc/objects/services_redis.cfg
# Redis Master 监控选项
define service {
host_name cache-1
servicegroups Redisservices
service_description Redis Master Clients
check_command check_redis!6379!'connected_clients,blocked_clients,client_longest_output_list,client_biggest_input_buf'!200,50,~,~!600,150,~,~
max_check_attempts 5
normal_check_interval 3
retry_check_interval 2
check_period 24x7
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
contact_groups ops
}
define service {
host_name cache-1
servicegroups Redisservices
service_description Redis Master Memory
check_command check_redis!6379!'used_memory_human,used_memory_peak_human'!~,~!~,~
max_check_attempts 5
normal_check_interval 3
retry_check_interval 2
check_period 24x7
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
contact_groups ops
}
define service {
host_name cache-1
servicegroups Redisservices
service_description Redis Master CPU
check_command check_redis!6379!'used_cpu_sys,used_cpu_user,used_cpu_sys_children,used_cpu_user_children'!~,~,~,~!~,~,~,~ ; #未定义监控报警阀值
max_check_attempts 5
normal_check_interval 3
retry_check_interval 2
check_period 24x7
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
contact_groups ops
}
# Redis Slave 监控选项
define service {
host_name cache-3
servicegroups Redisservices
service_description Redis Slave Clients
check_command check_redis!6379!'connected_clients,blocked_clients,client_longest_output_list,client_biggest_input