docker+bridge+redis master-slave+sentry mode

docker+网桥+redis主从+哨兵模式

I'm experimenting on two servers,一台服务器的ip是192.168.213.144,另一台服务器的ip是192.168.213.145

1. build a bridge

For the first part of building a bridge, you can refer to my blog,will be a little more detailed,https://blog.csdn.net/weixin_45753881/article/details/125973566

1.1 新建网桥

给主机192.168.213.144 The network segment assigned by the bridge is 172.20.144.0/24
给主机192.168.213.145 The network segment assigned by the bridge is 172.20.145.0/24

#在主机144上执行
docker network create --subnet=172.20.144.0/24 --gateway 172.20.144.1 redisbridge
#在主机145上执行
docker network create --subnet=172.20.145.0/24 --gateway 172.20.145.1 redisbridge

1.2 添加路由

#在主机144上执行
route add -net 172.20.144.0/24 gw 172.20.144.1
#在主机145上执行
route add -net 172.20.145.0/24 gw 172.20.145.1

1.3 配置iptables规则

#在主机144上执行
iptables -t nat -I PREROUTING -s 172.20.144.0/24 -d 172.20.145.0/24 -j DNAT --to 172.20.144.1
#在主机145上执行
iptables -t nat -I PREROUTING -s 172.20.145.0/24 -d 172.20.144.0/24 -j DNAT --to 172.20.145.1

2. 配置redis.conf

2.1 下载redis.conf(主机144和主机145都执行)

# 如果没有安装yum,需要先安装yum
yum -y install wget
# 下载redis.conf,下载路径为/root/redis.conf,You can also download to other paths,Remember to run createdocker容器命令（步骤3.1和3.2）Also change it to the address where you downloaded it
wget http://download.redis.io/redis-stable/redis.conf
# 在服务器的/root目录下创建redis.log文件,Other paths are also possible,Remember to run createdocker容器命令（步骤3.1和3.2）Also change it to the address you set
touch redis.log
# 给redis.log赋予权限
chmod 777 redis.log

2.2 配置redis.conf

2.2.1 配置redis主的redis.conf(主机144)

(1)注释 # bind 127.0.0.1
(2)关闭保护模式 protected-mode no
(3)（可选）设定密码 requirepass yourpwd
(4)配置日志路径,为了便于排查问题 logfile “/var/log/redis/redis.log”

# bind 127.0.0.1
protected-mode no
requirepass  yourpwd
logfile "/var/log/redis/redis.log"

2.2.2 配置redis从的redis.conf(主机145)

(1)注释 # bind 127.0.0.1
(2)关闭保护模式 protected-mode no
(3)（可选）设定密码 requirepass yourpwd
(4)配置日志路径,为了便于排查问题 logfile “/var/log/redis/redis.log”
(5)配置主库的ip和端口 replicaof 192.xxx.xxx.xxx 6379
192.xxx.xxx.xxx It is the server where the main library is locatedip,6379 是主库redis端口
(6)（视情况而定）If the master library is configured with a password,Then fill in the main library password here;If the main library does not set a password,就不用配 masterauth 主库密码

# bind 127.0.0.1
protected-mode no
requirepass  yourpwd
logfile "/var/log/redis/redis.log"
replicaof 192.xxx.xxx.xxx 6379  # Remember to replace hereip
masterauth  主库密码

3. 部署redis主从

3.1 部署redis主节点

# --network redisbridge is the bridge used
# -e TZ=Asia/Shanghai 设置时区
docker run  --network redisbridge --name redis_master --restart=always -e TZ=Asia/Shanghai -v /root/redis.conf:/usr/local/etc/redis/redis.conf -v /root/redis.log:/var/log/redis/redis.log -d -p 6379:6379 redis:7.0.4 redis-server /usr/local/etc/redis/redis.conf

3.2 部署redis从节点

docker run --network redisbridge --name redis_slave --restart=always -e TZ=Asia/Shanghai -v /root/redis.conf:/usr/local/etc/redis/redis.conf -v /root/redis.log:/var/log/redis/redis.log -d -p 6379:6379 redis:7.0.4 redis-server /usr/local/etc/redis/redis.conf

3.3 查看主从

# 进入redis从节点
docker exec -it redis_slave redis-cli
# 如果redis配置了密码,Password verification is performed,If the verification is passed, it will be printedOK
auth 密码
# info进行查看
info

4. 配置哨兵

4.1 配置sentinel.conf（Executed on all hosts）

# 下载sentinel.conf到/root路径下,You can also download to other paths,Remember to run createdocker容器命令（步骤4.2.1和4.2.2）Also change it to the address where you downloaded it
wget http://download.redis.io/redis-stable/sentinel.conf
# 在服务器的/root目录下创建sentinel.log文件,Other paths are also possible,Remember to run createdocker容器命令（步骤4.2.1和4.2.2）Also change it to the address you set
touch sentinel.log
# sentinel.log赋予权限
chmod 777 sentinel.log

修改sentinel.conf以下几项

# 编辑sentinel.conf,进行以下配置,这里ip改成自己的服务器地址
sentinel monitor mymaster 192.168.213.144 6379 1
# 修改日志文件的路径
logfile "/var/log/redis/sentinel.log"
# 修改监控的主redis服务器,最后一个1表示,1After each machine determines that the active and passive are offline,就进行failover(故障转移)
sentinel monitor mymaster 192.168.213.144 6379 2

4.2 创建sentinel容器

4.2.1 在redisExecuted on the host where the master node is located

docker run --network redisbridge --name sentinel_master --ip 172.20.144.3 -p 26379:26379 --restart=always  -e TZ=Asia/Shanghai -v /root/sentinel.conf:/usr/local/etc/redis/sentinel.conf -v /root/sentinel.log:/var/log/redis/sentinel.log -d redis:7.0.4 redis-sentinel /usr/local/etc/redis/sentinel.conf

4.2.2 在redisExecute from the host where the node is located

docker run --network redisbridge --name sentinel_slave --ip 172.20.145.3 -p 26379:26379 --restart=always  -e TZ=Asia/Shanghai -v /root/sentinel.conf:/usr/local/etc/redis/sentinel.conf -v /root/sentinel.log:/var/log/redis/sentinel.log -d redis:7.0.4 redis-sentinel /usr/local/etc/redis/sentinel.conf

4.3 测试哨兵

（1）停掉redis主节点,等30秒后,进入redisUse from nodeinfoCheck whether the slave node is switched to the master node
（2）Also available on the server/root路径下使用cat sentinel.log查看日志（/root/sentinel.logis configured in the previous step）