概述

生产中为了避免单点故障，生产环境中redis升级为扩展模式，需要对redis进行监控，一旦有中断出现故障便触发报警。Redis有自带的redis-cli客户端，通过群集信息命令能查询到生成的运行情况，我们可以写一个shell脚本，通过zabbix来调用这个脚本实现监控。

一、集群信息命令的使用

命令格式：

redis-cli -h [主机名] -p [端口] -a [密码]集群信息

1，查询可执行运行状态，1为正常，0为故障

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep "cluster_state"

2，redis赋予已分配的槽

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep -w "cluster_slots_assigned" | awk -F':' '{print $2}'

3，redis分配槽的状态是ok的数量

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep -w "cluster_slots_ok" | awk -F':' '{print $2}'

4，redis可行可能失效的槽数

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep -w "cluster_slots_pfail" | awk -F':' '{print $2}'

5，redis能够已经失效的槽数

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep -w "cluster_slots_fail" | awk -F':' '{print $2}'

6，redis赋予中所有子系统个数

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep -w "cluster_known_nodes" | awk -F':' '{print $2}'

7，redis赋予中主报价个数

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep -w "cluster_size" | awk -F':' '{print $2}'

8，redis部署中的currentEpoch值

（累积中的currentEpoch总是一致的，currentEpoch变为，代表路由器的配置或操作越新，积累中最大的那个node epoch

当发生的状态发生改变时，某些代表为了执行一些动作需要寻求其他例程的同意时，就会增加currentEpoch的值）

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep -w "cluster_current_epoch" | awk -F':' '{print $2}'

9，redis容量中二进制总线接收的消息数量

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep -w "cluster_stats_messages_sent" | awk -F':' '{print $2}'

10，redis容量中二进制总线发送的消息数量

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 cluster info | grep -w "cluster_stats_messages_received" | awk -F':' '{print $2}'

11，redis端口存活监控

redis-cli -h xxx.xxx.xxx.xxx -a 'password' -p 7001 ping | grep -c PONG

二，创建监控脚本

（1），监控redis运输幸存的脚本

[root @ admin conf]＃vim redis-port.sh

#!/bin/bash
#根据实际情况修改
REDISCLI="/usr/local/bin/redis-cli"
HOST="192.168.2.14"
port1=7001
port2=7002
port3=7003
port4=7004
port5=7005
port6=7006
if [[ $# == 1 ]];then
case $1 in
7001)
result=`$REDISCLI -h $HOST -p $port1 ping 2>/dev/null | grep -c PONG`
echo $result
;;
7002)
result=`$REDISCLI -h $HOST -p $port2 ping 2>/dev/null | grep -c PONG`
echo $result
;;
7003)
result=`$REDISCLI -h $HOST -p $port3 ping 2>/dev/null | grep -c PONG`
echo $result
;;
7004)
result=`$REDISCLI -h $HOST -p $port4 ping 2>/dev/null | grep -c PONG`
echo $result
;;
7005)
result=`$REDISCLI -h $HOST -p $port5 ping 2>/dev/null | grep -c PONG`
echo $result
;;
7006)
result=`$REDISCLI -h $HOST -p $port6 ping 2>/dev/null | grep -c PONG`
echo $result
;;
*)
echo -e "\033[33mUsage: $0 {7001|7002|7003}\033[0m"
;;
esac
fi

（2），监控redis-cluster部署的脚本

[root @ admin conf]＃vim redis-cluster.sh

#!/bin/bash
#根据实际情况修改
REDISCLI="/usr/local/bin/redis-cli"
HOST="192.168.2.14"
PORT=`ps -ef | grep -w redis-server | grep -v "grep" | awk '{print $9}' | awk -F ':' '{print $2}' | head -1`

if [[ $# == 1 ]];then
case $1 in
cluster_state)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_state" | awk -F':' '{print $2}' | grep -c "ok"`
echo $result
;;
cluster_slots_assigned)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_slots_assigned" | awk -F':' '{print $2}'`
echo $result
;;
cluster_slots_ok)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_slots_ok" | awk -F':' '{print $2}'`
echo $result
;;
cluster_slots_pfail)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_slots_pfail" | awk -F':' '{print $2}'`
echo $result
;;
cluster_slots_fail)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_slots_fail" | awk -F':' '{print $2}'`
echo $result
;;
cluster_known_nodes)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_known_nodes" | awk -F':' '{print $2}'`
echo $result
;;
cluster_size)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_size" | awk -F':' '{print $2}'`
echo $result
;;
cluster_current_epoch)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_current_epoch" | awk -F':' '{print $2}'`
echo $result
;;
cluster_stats_messages_sent)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_stats_messages_sent" | awk -F':' '{print $2}'`
echo $result
;;
cluster_stats_messages_received)
result=`$REDISCLI -h $HOST -p $PORT cluster info 2>/dev/null | grep -w "cluster_stats_messages_received" | awk -F':' '{print $2}'`
echo $result
;;
*)
echo -e "\033[33mUsage: $0 {cluster_state|cluster_slots_assigned|cluster_slots_ok|cluster_slots_pfail|cluster_slots_fail|cluster_known_nodes|cluster size|cluster current epoch|cluster_stats_messages_sent|cluster_stats_messages_received}\033[0m"
;;
esac
fi

（3）授予脚本调试权限

[root@admin conf]# chmod +x redis-cluster.sh
[root@admin conf]# chmod +x redis-port.sh

（4）脚本测试

查看redis赋予状态：

[root@admin conf]# ./redis-cluster.sh cluster_state
1

查看redis 7001端口状态：

[root@admin conf]# ./redis-port.sh 7001
1

三，创建redis分布式监控配置文件

1，编写监控配置文件

[root @ admin conf]＃vi zabbix_agentd.conf

＃添加两行自定义KEY

＃redis-cluster实施监控

UserParameter = Redis.Cluster [*]，/ home / zabbix / conf / redis-cluster.sh $ 1

＃redis-port端口监控

UserParameter = Redis.Port [*]，/ home / zabbix / conf / redis-port.sh $ 1

2，重启zabbix-agent

[root @ admin〜]＃/etc/init.d/zabbix-agent重新启动

3，登录zabbix服务器服务端机器上测试

[root@zabbix ~]# zabbix_get -s 192.168.2.14 -p 10050 -k "Redis.Cluster[cluster_state]"
1
[root@zabbix ~]# zabbix_get -s 192.168.2.14 -p 10050 -k "Redis.Port[7001]"
1