服務器:Centos7
前提:selinux關掉
一,安裝docker並配置鏡像加速(我用的阿里加速)
[root@localhost ~]# yum -y install docker
[root@localhost ~]# cd /etc/docker/
[root@localhost docker]# cat daemon.json
{
"registry-mirrors": ["https://yol1de5p.mirror.aliyuncs.com"]
}
[root@localhost docker]# systemctl restart docker
二,拉取redis鏡像
[root@localhost ~]# docker pull redis
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/redis latest 36304d3b4540 10 days ago 104 MB
三,運行redis-server容器並做持久化配置
[root@localhost ~]# mkdir /data
主:
[root@localhost ~]# docker run --name redis-master -d -p 6379:6379 -v /opt/redis-master:/data redis
倆從:
[root@localhost ~]# docker run --name redis-slave1 -d -p 6380:6379 -v /opt/redis-slave1:/data redis
[root@localhost ~]# docker run --name redis-slave2 -d -p 6381:6379 -v /opt/redis-slave2:/data redis
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
28e215ff4bc2 redis "docker-entrypoint..." 21 seconds ago Up 20 seconds 0.0.0.0:6381->6379/tcp redis-slave2
7e579f3ec09c redis "docker-entrypoint..." 56 seconds ago Up 56 seconds 0.0.0.0:6380->6379/tcp redis-slave1
d7af410bffc3 redis "docker-entrypoint..." 2 minutes ago Up 2 minutes 0.0.0.0:6379->6379/tcp redis-master
四,查看容器IP
[root@localhost ~]# docker inspect redis-master redis-slave1 redis-slave2 | grep IPAd
"SecondaryIPAddresses": null,
"IPAddress": "172.17.0.2",
"IPAddress": "172.17.0.2",
"SecondaryIPAddresses": null,
"IPAddress": "172.17.0.3",
"IPAddress": "172.17.0.3",
"SecondaryIPAddresses": null,
"IPAddress": "172.17.0.4",
"IPAddress": "172.17.0.4",
注:這裏記住主的IP:172.17.0.2
五,配置redis集羣,一主兩從
我們將redis-master配置爲主,redis-slave1和redis-slave2配置爲從
登錄從redis-slave1
[root@localhost ~]# docker exec -it redis-slave1 redis-cli
127.0.0.1:6379> SLAVEOF 172.17.0.2 6379
OK
127.0.0.1:6379> ROLE
1) "slave"
2) "172.17.0.2"
3) (integer) 6379
4) "connected"
5) (integer) 14
登錄從redis-slave2
[root@localhost ~]# docker exec -it redis-slave2 redis-cli
127.0.0.1:6379> SLAVEOF 172.17.0.2 6379
OK
127.0.0.1:6379> ROLE
1) "slave"
2) "172.17.0.2"
3) (integer) 6379
4) "connected"
5) (integer) 112
登錄主redis-master查看主從情況
[root@localhost ~]# docker exec -it redis-master redis-cli
127.0.0.1:6379> info replication
# Replication
role:master
connected_slaves:2
slave0:ip=172.17.0.3,port=6379,state=online,offset=252,lag=0
slave1:ip=172.17.0.4,port=6379,state=online,offset=252,lag=1
六,驗證主從是否集羣成功
[root@localhost ~]# docker exec -it redis-master redis-cli
127.0.0.1:6379> set name tom
OK
127.0.0.1:6379> exit
[root@localhost ~]# docker exec -it redis-slave1 redis-cli
127.0.0.1:6379> get name
"tom"
127.0.0.1:6379> exit
[root@localhost ~]# docker exec -it redis-slave2 redis-cli
127.0.0.1:6379> get name
"tom"
127.0.0.1:6379>