Docker搭建Redis集群

注意：Redis搭建集群最少需要6个Redis节点，其中3个作为主节点，3个作为从节点；

为了方便，这里用Docker在一台机器上启动6个容器来作为集群，生产上建议用多台服务器搭建；

1. 创建Redis配置文件

   集群的访问密码，Redis访问密码需要自己改以下，这里默认为2022

#!/bin/bash
if [ ! $1 ]; thenecho "请输入Redis配置文件存放路径,例如:/home"exit 1
fi
for port in $(seq 1 6);
do
mkdir -p $1/redis/node-${port}/conf
mkdir -p $1/redis/node-${port}/data
touch $1/redis/node-${port}/conf/redis.conf
cat << EOF > $1/redis/node-${port}/conf/redis.conf
#port(端口号)
port 6379
bind 0.0.0.0
#masterauth(设置集群节点间访问密码,跟下面一致)
masterauth 2022
#requirepass(设置Redis访问密码)
requirepass 2022
#cluster-enabled yes(启动集群模式)
cluster-enabled yes
#cluster-config-file nodes.conf(集群节点信息文件)
cluster-config-file nodes.conf
#cluster-node-timeout 5000(Redis节点宕机被发现的时间)
cluster-node-timeout 5000
#cluster-announce-ip(集群节点的汇报ip,防止nat,预先填写为网关ip后续需要手动修改配置文件)
cluster-announce-ip 172.18.0.1${port}
#cluster-announce-port(集群节点的汇报port,防止nat)
cluster-announce-port 6379
#cluster-announce-bus-port(集群节点的汇报bus-port,防止nat)
cluster-announce-bus-port 16379
#appendonly yes(开启aof)
appendonly yes
EOF
done

运行脚本，在home目录下可以看到创建好的6个Redis配置文件

(base) ➜  ~ chmod +x redis_conf.sh
(base) ➜  ~ ./redis_conf.sh /home

2. 创建docker-compose脚本

自行修改IP和端口,需要和上面的Redis配置文件保持一致

version: '3'
services:# redis-1redis-1:image: redis:latestcontainer_name: redis-1hostname: redis-1ports:- "6371:6379"- "16371:16379"command: "redis-server /etc/redis/redis.conf"environment:- TZ=Asia/Shanghaivolumes:- ./redis/node-1/data:/data- ./redis/node-1/conf/redis.conf:/etc/redis/redis.confnetworks:tools_net:ipv4_address: 172.18.0.11# redis-2redis-2:image: redis:latestcontainer_name: redis-2hostname: redis-2ports:- "6372:6379"- "16372:16379"command: "redis-server /etc/redis/redis.conf"environment:- TZ=Asia/Shanghaivolumes:- ./redis/node-2/data:/data- ./redis/node-2/conf/redis.conf:/etc/redis/redis.confnetworks:tools_net:ipv4_address: 172.18.0.12# redis-3redis-3:image: redis:latestcontainer_name: redis-3hostname: redis-3ports:- "6373:6379"- "16373:16379"command: "redis-server /etc/redis/redis.conf"environment:- TZ=Asia/Shanghaivolumes:- ./redis/node-3/data:/data- ./redis/node-3/conf/redis.conf:/etc/redis/redis.confnetworks:tools_net:ipv4_address: 172.18.0.13# redis-4redis-4:image: redis:latestcontainer_name: redis-4hostname: redis-4ports:- "6374:6379"- "16374:16379"command: "redis-server /etc/redis/redis.conf"environment:- TZ=Asia/Shanghaivolumes:- ./redis/node-4/data:/data- ./redis/node-4/conf/redis.conf:/etc/redis/redis.confnetworks:tools_net:ipv4_address: 172.18.0.14# redis-5redis-5:image: redis:latestcontainer_name: redis-5hostname: redis-5ports:- "6375:6379"- "16375:16379"command: "redis-server /etc/redis/redis.conf"environment:- TZ=Asia/Shanghaivolumes:- ./redis/node-5/data:/data- ./redis/node-5/conf/redis.conf:/etc/redis/redis.confnetworks:tools_net:ipv4_address: 172.18.0.15# redis-6redis-6:image: redis:latestcontainer_name: redis-6hostname: redis-6ports:- "6376:6379"- "16376:16379"command: "redis-server /etc/redis/redis.conf"environment:- TZ=Asia/Shanghaivolumes:- ./redis/node-6/data:/data- ./redis/node-6/conf/redis.conf:/etc/redis/redis.confnetworks:tools_net:ipv4_address: 172.18.0.16
networks:tools_net:ipam:config:- subnet: 172.18.0.0/24

启动Redis

(base) ➜  ~ docker-compose up -d
(base) ➜  ~ docker ps

3. 配置Redis集群

进入其中一台容器,进行Redis集群配置

redis-cli -a 2022 --cluster create 172.18.0.11:6379 172.18.0.12:6379 172.18.0.13:6379 172.18.0.14:6379 172.18.0.15:6379 172.18.0.16:6379 --cluster-replicas 1

(base) ➜  ~ docker exec -it redis-1 bash
# -a 为上面设置的密码
root@redis-1:/data# redis-cli -a 2022 --cluster create 172.18.0.11:6379 172.18.0.12:6379 172.18.0.13:6379 172.18.0.14:6379 172.18.0.15:6379 172.18.0.16:6379 --cluster-replicas 1
# 回车后,会有提示,是否同意设置上面的配置,输入yes,然后集群就算搭建成功了;

4. 验证集群是否搭建成功

新增一个key,可以看到,数据成功的存入了redis-2这台容器

# 进入其中一台容器,执行如下命令,以集群模式进入
root@redis-1:/data# redis-cli -c -a 2022
127.0.0.1:6379> set name yid
-> Redirected to slot [5798] located at 172.18.0.12:6379
OK
172.18.0.12:6379> get name
"yid"

# 查看节点
172.18.0.12:6379> CLUSTER NODES