一主双从redis+哨兵模式以及通过Ansible+Shell快速部署redis哨兵模式-易微帮

[root@localhost ~]# tar redis-6.2.14.tar.gz -C /usr/local/src/
[root@localhost ~]# yum install -y gcc tcl gcc-c++ make
[root@localhost redis-6.2.14]# make && make install
[root@localhost src]# cd /usr/local/bin/
[root@localhost bin]# ll
total 18940
-rw-r--r-- 1 root root      93 Apr 17 20:35 dump.rdb
-rwxr-xr-x 1 root root 4830656 Apr 17 20:34 redis-benchmark
lrwxrwxrwx 1 root root      12 Apr 17 20:34 redis-check-aof -> redis-server
lrwxrwxrwx 1 root root      12 Apr 17 20:34 redis-check-rdb -> redis-server
-rwxr-xr-x 1 root root 5004760 Apr 17 20:34 redis-cli
lrwxrwxrwx 1 root root      12 Apr 17 20:34 redis-sentinel -> redis-server
-rwxr-xr-x 1 root root 9548208 Apr 17 20:34 redis-server

2.为redis创建软链接和service管理方便启动

[root@localhost ~]# ln -s /usr/local/bin/redis-cli /root/redis-cli
[root@localhost ~]# ln -s /usr/local/bin/redis-server /root/redis-server
[root@localhost ~]# cat /usr/lib/systemd/system/redis.service 
[Unit]
Description=Redis Server Manager
After=network.target
[Service]
Type=forking
ExecStart=/root/redis-server /etc/redis.conf   #在这里指定启动参数，通常不配置service也可以通过这个命令进行启动
PrivateTmp=true

[Install]
WantedBy=multi-user.target
[root@localhost ~]# systemctl daemon-reload

3.修改redis的配置文件

[root@localhost ~]# cp /usr/local/src/redis-6.2.14/redis.conf /etc/redis.conf  #拷贝过去
[root@localhost ~]# sed -i 's/^bind.*/bind 0.0.0.0/' /etc/redis.conf 
[root@localhost ~]# sed -i 's/^logfile.*/logfile \/var\/log\/redis\/redis.log/' /etc/redis.conf
[root@localhost ~]# sed -i 's/^port.*/port 6379/' /etc/redis.conf
[root@localhost ~]# sed -i 's/^daemonize.*/daemonize yes/' /etc/redis.conf 
[root@localhost ~]# sed -i 's/^appendonly.*/appendonly yes/' /etc/redis.conf 
[root@localhost ~]# sed -i 's/^# requirepass.*/requirepass 123456/' /etc/redis.conf
[root@localhost ~]# systemctl restart redis
[root@localhost ~]# ./redis-cli -p 6379
127.0.0.1:6379> auth 123456
OK
127.0.0.1:6379> ping
PONG
sed -i 's/^bind.*/bind 0.0.0.0/' /etc/redis.conf
sed -i 's/^logfile.*/logfile \/var\/log\/redis\/redis.log/' /etc/redis.conf
sed -i 's/^port.*/port 6379/' /etc/redis.conf
sed -i 's/^daemonize.*/daemonize yes/' /etc/redis.conf 
sed -i 's/^appendonly.*/appendonly yes/' /etc/redis.conf 
sed -i 's/^# requirepass.*/requirepass 123456/' /etc/redis.conf
sed -i 's/^# masterauth.*/masterauth 123456/' /etc/redis.conf

二.配置备redis

和上面同样的操作，解压编译、创建软链接、拷贝并修改redis.conf文件，然后在主redis上拷贝service文件到两台备redis

[root@localhost ~]# scp /usr/lib/systemd/system/redis.service root@192.168.2.102:/usr/lib/systemd/system/
[root@localhost ~]# scp /usr/lib/systemd/system/redis.service root@192.168.2.190:/usr/lib/systemd/system/
两台备redis重载文件
systemctl daemon-reload

注意两台备redis在修改redis.conf时还要多修改几个参数，因为主redis的配置了密码要求，并且这里选择了更改端口

[root@localhost ~]# sed -i 's/^bind.*/bind 0.0.0.0/' /etc/redis.conf 
[root@localhost ~]# sed -i 's/^logfile.*/logfile \/var\/log\/redis\/redis.log/' /etc/redis.conf
[root@localhost ~]# sed -i 's/^port.*/port 6375/' /etc/redis.conf
[root@localhost ~]# sed -i 's/^daemonize.*/daemonize yes/' /etc/redis.conf 
[root@localhost ~]# sed -i 's/^appendonly.*/appendonly yes/' /etc/redis.conf 
[root@localhost ~]# sed -i 's/^requirepass.*/requirepass 123456/' /etc/redis.conf
[root@localhost ~]# sed -i 's/replicaof.*/replicaof 192.168.2.101 6379/' redis.conf  #指定你要绑定的主redis的IP和端口
[root@localhost ~]# sed -i 's/masterauth.*/masterauth 123456/' redis.conf   #指定主redis的密码
[root@localhost ~]# systemctl restart redis

三.主redis上查看集群状态

1.主redis登录上去查看状态并且创建数据用于验证同步性

[root@localhost ~]# ./redis-cli -p 6379
127.0.0.1:6379> auth 123456
OK
127.0.0.1:6379> info replication
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.2.102,port=6375,state=online,offset=2002,lag=0
slave1:ip=192.168.2.190,port=6376,state=online,offset=2002,lag=0
master_failover_state:no-failover
master_replid:2cb4965520a60a53417fb26183178d5a6800dfe3
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:2002
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:2002
127.0.0.1:6379> 
127.0.0.1:6379> keys *
1) "lilxinjin"
2) "key6"
3) "sulibao"
4) "key7"
5) "niexincheng"

2.备redis查看数据是否同步过来

[root@localhost ~]# ./redis-cli -p 6375
127.0.0.1:6375> ping
PONG
127.0.0.1:6375> keys *
1) "niexincheng"
2) "sulibao"
3) "lilxinjin"
4) "key6"
5) "key7"
[root@localhost ~]# ./redis-cli -p 6376
127.0.0.1:6376> keys *
1) "niexincheng"
2) "sulibao"
3) "key6"
4) "lilxinjin"
5) "key7"

四.模拟测试

1.主redis宕机时

主机宕机时，备redis仍然可以提供读的操作，但是不能写和删除

#主机宕机后备redis仍然是slave
127.0.0.1:6375> info replication
# Replication
role:slave
master_host:192.168.2.101
master_port:6379
master_link_status:down
master_last_io_seconds_ago:-1
master_sync_in_progress:0
slave_read_repl_offset:2352
slave_repl_offset:2352
master_link_down_since_seconds:15
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:2cb4965520a60a53417fb26183178d5a6800dfe3
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:2352
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:2352


127.0.0.1:6376> info replication
# Replication
role:slave
master_host:192.168.2.101
master_port:6379
master_link_status:down
master_last_io_seconds_ago:-1
master_sync_in_progress:0
slave_read_repl_offset:2352
slave_repl_offset:2352
master_link_down_since_seconds:39
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:2cb4965520a60a53417fb26183178d5a6800dfe3
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:2352
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:2352

当主redis恢复后，他仍然还是master，读写操作也正常，数据也都还在

[root@localhost ~]# systemctl start redis
[root@localhost ~]# ./redis-cli -p 6379
127.0.0.1:6379> auth 123456
OK
127.0.0.1:6379> info replication
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.2.190,port=6376,state=online,offset=28,lag=1
slave1:ip=192.168.2.102,port=6375,state=online,offset=28,lag=0
master_failover_state:no-failover
master_replid:5c009c69f5e98bc4580fb4090b7a7032795744d4
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:28
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:28

2.备redis宕机时

备redis宕机后，我们这里是在配置文件中指定了和主redis的绑定关系的，所以他宕机后恢复时的身份仍然是slave，数据都还在。但是如果只是在命令行指定的绑定关系，那么他这个设备上的身份应该是恢复为master了然后数据也没了。使用 slaveof no one 可以将从机变为主机

五.redis哨兵

基于上面的环境进行配置

1.配置sentinel.conf文件

101、102、190主机都配置如下，这个配置文件在sentinel生效后会生成额外内容，并且在master产生漂移过后所监控的主机和端口也会变化

[root@localhost bin]# pwd
/usr/local/bin
[root@localhost bin]# cat sentinel.conf 
daemonize yes
logfile "/var/log/redis/sentinel.log"
sentinel monitor redis01 192.168.2.101 6379 2
sentinel down-after-milliseconds redis01 10000
sentinel failover-timeout redis01 60000
sentinel parallel-syncs redis01 2
sentinel auth-pass redis01 123456

2.运行sentinel.conf文件

#三台设备分别以主->从依次运行
redis-sentinel sentinel.conf &

3.查看进程是否起来了

[root@localhost bin]# ps -ef | grep sentinel
root      22449      1  0 11:12 ?        00:00:08 redis-sentinel *:26379 [sentinel]
root      22462  21745  0 11:13 pts/3    00:00:00 tail -f /var/log/redis/sentinel.log

4.三台设备都运行起来后就停掉主redis（101）然后查看日志

#主设备上
systemctl stop redis

#主设备上的sentinel.log内容
22449:X 22 Apr 2024 11:16:52.859 * +failover-state-wait-promotion slave 192.168.2.102:6375 192.168.2.102 6375 @ redis01 192.168.2.101 6379
22449:X 22 Apr 2024 11:16:53.588 # +promoted-slave slave 192.168.2.102:6375 192.168.2.102 6375 @ redis01 192.168.2.101 6379
22449:X 22 Apr 2024 11:16:53.589 # +failover-state-reconf-slaves master redis01 192.168.2.101 6379
22449:X 22 Apr 2024 11:16:53.688 * +slave-reconf-sent slave 192.168.2.190:6376 192.168.2.190 6376 @ redis01 192.168.2.101 6379
22449:X 22 Apr 2024 11:16:54.608 * +slave-reconf-inprog slave 192.168.2.190:6376 192.168.2.190 6376 @ redis01 192.168.2.101 6379
22449:X 22 Apr 2024 11:16:54.814 # -odown master redis01 192.168.2.101 6379
22449:X 22 Apr 2024 11:17:53.591 # +failover-end-for-timeout master redis01 192.168.2.101 6379
22449:X 22 Apr 2024 11:17:53.591 # +failover-end master redis01 192.168.2.101 6379
22449:X 22 Apr 2024 11:17:53.591 * +slave-reconf-sent-be slave 192.168.2.190:6376 192.168.2.190 6376 @ redis01 192.168.2.101 6379
22449:X 22 Apr 2024 11:17:53.591 # +switch-master redis01 192.168.2.101 6379 192.168.2.102 6375    #这里表示已经将master切换到102主机上
22449:X 22 Apr 2024 11:17:53.592 * +slave slave 192.168.2.190:6376 192.168.2.190 6376 @ redis01 192.168.2.102 6375
22449:X 22 Apr 2024 11:17:53.592 * +slave slave 192.168.2.101:6379 192.168.2.101 6379 @ redis01 192.168.2.102 6375
22449:X 22 Apr 2024 11:18:03.629 # +sdown slave 192.168.2.101:6379 192.168.2.101 6379 @ redis01 192.168.2.102 6375

5.在102和190主机上查看

如下为102主机的redis，我使用的是6375端口,190使用的6376端口

127.0.0.1:6375> info replication
# Replication
role:master
connected_slaves:0
master_failover_state:no-failover
master_replid:eecf88568f1ffefcdc315f73427f371d0496c878
master_replid2:321f7c50f38e8c9dd042bb88080a381d0baef84d
master_repl_offset:605938
second_repl_offset:44936
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:605938

127.0.0.1:6376> info replication
# Replication
role:slave
master_host:192.168.2.102
master_port:6375
master_link_status:down
master_last_io_seconds_ago:-1
master_sync_in_progress:0
slave_read_repl_offset:44935
slave_repl_offset:44935
master_link_down_since_seconds:2743
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:321f7c50f38e8c9dd042bb88080a381d0baef84d
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:44935
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:43
repl_backlog_histlen:44893

6.当101恢复后的情况

他重新进来后是作为slave身份了，现在的集群中的master就是102主机了

127.0.0.1:6379> info replication
# Replication
role:slave
master_host:192.168.2.102
master_port:6375
master_link_status:down
master_last_io_seconds_ago:-1
master_sync_in_progress:0
slave_read_repl_offset:0
slave_repl_offset:0
master_link_down_since_seconds:-1
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:f9eec4b7a919560dbce7aa6117067414d9a891de
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:0
second_repl_offset:-1
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0

六.Ansible+Shell快速部署redis一主双从哨兵模式

主要都在master上做，文件有点长，很多需要改进的地方，按需修改吧，文件内部的主机、密码、目录、文件名等参数请自行修改。

先执行redis.sh，把自己的环境部好，然后通过ansible-playbook redis-backup.yaml来为两台从redis部署环境，于2024/4/22日成功快速搭建，redis版本为7.0.15，Ansible版本为2.9.27，如有疑问请于CSDN私聊或发送邮箱至sulibao2003@163.com，脚本文件和剧本文件放在百度/迅雷网盘了。

分享文件：Ansible+Shell-redis
链接：https://pan.xunlei.com/s/VNw5EfaHp-_r1h9Ud5e9vjAdA1#
提取码：47xf
复制这段内容后打开手机迅雷App，查看更方便

链接：https://pan.baidu.com/s/12TYqW8GWEAH0qt_Pm6MJWA 
提取码：tdbe

一主双从redis+哨兵模式以及通过Ansible+Shell快速部署redis哨兵模式

一.主redis配置

1.解压并进行编译安装