redis哨兵常用命令和监控示例详解_Redis

redis哨兵常用命令和监控示例详解

2021-08-06 17:48knowledge-is-power Redis

哨兵模式是一种特殊的模式，首先Redis提供了哨兵的命令，哨兵是一个独立的进程，作为进程，它会独立运行，接下来通过本文给大家讲解redis哨兵常用命令和监控知识，感兴趣的朋友一起学习吧

sentinel monitor advertise 192.168.0.5 28001 2
sentinel set advertise client-reconfig-script /etc/redis/reconfig.sh
sentinel flushconfig

sentinel启动后需要手动将配置文件对应的调整为sentinel deny-scripts-reconfig no,否则不支持命令行runtime修改client-reconfig-script
# SECURITY
#
# By default SENTINEL SET will not be able to change the notification-script
# and client-reconfig-script at runtime. This avoids a trivial security issue
# where clients can set the script to anything and trigger a failover in order
# to get the program executed.

#sentinel deny-scripts-reconfig yes

role命令
查看sentinel monitor的master names名字

sentinel masters
查看所有监控master及其配置信息

sentinel master monitor_name
查看指定监控master及其配置信息

sentinel failover monitor_name
手动进行swithover切换主从，如果有多个slave会选择哪个slave做为新的master，待测试？

sentinel moniotr <name> <ip> <port> <quorum>
添加监视的master

sentinel remove monitor_name
将监视的为name的master移除监视

sentinel set <mastername> [<option> <value>]
修改监视的master的一些属性
down-after-milliseconds 过了这个时间考虑master go down
failover-timeout 刷新故障转移状态的最大时间
parallel-syncs slave同时reconfigure的个数
notification-script 设置通知脚本
client-reconfig-script 设置通知脚本
auth-pass 执行auth的密码
quorum 修改master的quorum

sentinel flushconfig

将sentinel信息写入到配置文件中

sentinel配置文件示例：

				?

									daemonize yes

									pidfile "/home/redis/sentinel/25000/redis.pid"

									loglevel notice

									protected-mode yes

									bind 192.168.100.5

									logfile "/home/redis/sentinel/25000/redis.log"

									port 25000

									dir "/home/redis/sentinel/25000"

									# Generated by CONFIG REWRITE

									sentinel myid 0338c4ceb7cf39a8037a22fa17d0f7a76923b5a0

									sentinel deny-scripts-reconfig no

									sentinel monitor advertise 192.168.100.5 28001 2

									sentinel client-reconfig-script advertise /etc/redis/reconfig.sh

									sentinel config-epoch advertise 4

									sentinel leader-epoch advertise 4

									sentinel known-replica advertise 192.168.100.6 28001

									sentinel known-sentinel advertise 192.168.100.7 25000 06f937e1d35496dc66d2899e3b25e286ff91d658

									sentinel known-sentinel advertise 192.168.100.6 25000 ede86ac0b7d2ff7b532d0e5352ba6e33dd36670e

									sentinel monitor mymaster1 192.168.100.6 28002 2

									sentinel client-reconfig-script mymaster1 /etc/redis/reconfig.sh

									sentinel config-epoch mymaster1 5

									sentinel leader-epoch mymaster1 1

									sentinel known-replica mymaster1 192.168.100.5 28002

									sentinel known-sentinel mymaster1 192.168.100.7 25000 06f937e1d35496dc66d2899e3b25e286ff91d658

									sentinel known-sentinel mymaster1 192.168.100.6 25000 ede86ac0b7d2ff7b532d0e5352ba6e33dd36670e

									sentinel current-epoch 5

sentinel client-reconfig-script脚本示例

				?

									#!/bin/bash

									check_time=$(date +"%F-%T")

									master_name="$1"

									from_ip="$4"

									from_port="$5"

									to_ip="$6"

									to_port="$7"

									#填写自己正确的机器人链接

									curl 'https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=xxxx' \

									   -H 'Content-Type: application/json' \

									   -d '

									   {

									        "msgtype": "text",

									        "text": {

									            "content": "【'$check_time' '$master_name' redis failover】\nfrom\n'$from_ip:$from_port'\nto\n'$to_ip:$to_port'",

									            "mentioned_list":["xiaodongl"]

									        }

									   }'