本文是通过docker-compose在linux配置redis高可用。前提条件是系统中需要安装docker和docker-compose。

配置配置、数据和logs目录

mkdir -p /home/docker-redis

       在当前目录下创建cluster-conf.conf配置文件，并且在文件中添加如下配置文件。

# redis端口
port ${PORT}
# 连接密码
requirepass 123456
masterauth 123456
# 关闭保护模式
protected-mode no
# 开启集群
cluster-enabled yes
# 集群节点配置
cluster-config-file nodes.conf
# 超时
cluster-node-timeout 5000
# 集群节点IP host模式为宿主机IP
cluster-announce-ip 10.10.20.100
# 集群节点端口 7001 - 7006
cluster-announce-port ${PORT}
cluster-announce-bus-port 1${PORT}
# 开启 appendonly 备份模式
appendonly yes
# 每秒钟备份
appendfsync everysec
# 对aof文件进行压缩时，是否执行同步操作
no-appendfsync-on-rewrite no
# 当目前aof文件大小超过上一次重写时的aof文件大小的100%时会再次进行重写
auto-aof-rewrite-percentage 100
# 重写前AOF文件的大小最小值 默认 64mb
auto-aof-rewrite-min-size 64mb

       配置六台服务的data、conf和logs。

for port in `seq 7001 7006`;  \
do   mkdir -p ./${port}/conf  \
  && PORT=${port} envsubst < ./cluster-conf.conf > ./${port}/conf/redis.conf   \
  && mkdir -p ./${port}/data \
  && mkdir -p ./${port}/logs; \
done

       结果如下：

配置docker-compose

       在当前目录下创建docker-compse.yml文件，然后将如配置件添加到文件中

version: '3.7'
services:
  redis-1:
    restart: always
    image: redis:latest
    container_name: redis-1
    environment:
      - TZ=Asia/Shanghai
    network_mode: "host"
    volumes:
      - $PWD/7001/data:/data:rw
      - $PWD/7001/conf/redis.conf:/etc/redis/redis.conf:rw
    command: ["redis-server","/etc/redis/redis.conf"]
  redis-2:
    restart: always
    image: redis:latest
    container_name: redis-2
    environment:
      - TZ=Asia/Shanghai
    network_mode: "host"
    volumes:
      - $PWD/7002/data:/data:rw
      - $PWD/7002/conf/redis.conf:/etc/redis/redis.conf:rw
    command: ["redis-server","/etc/redis/redis.conf"]
  redis-3:
    restart: always
    image: redis:latest
    container_name: redis-3
    environment:
      - TZ=Asia/Shanghai
    network_mode: "host"
    volumes:
      - $PWD/7003/data:/data:rw
      - $PWD/7003/conf/redis.conf:/etc/redis/redis.conf:rw
    command: ["redis-server","/etc/redis/redis.conf"]
  redis-4:
    restart: always
    image: redis:latest
    container_name: redis-4
    environment:
      - TZ=Asia/Shanghai
    network_mode: "host"
    volumes:
      - $PWD/7004/data:/data:rw
      - $PWD/7004/conf/redis.conf:/etc/redis/redis.conf:rw
    command: ["redis-server","/etc/redis/redis.conf"]
  redis-5:
    restart: always
    image: redis:latest
    container_name: redis-5
    environment:
      - TZ=Asia/Shanghai
    network_mode: "host"
    volumes:
      - $PWD/7005/data:/data:rw
      - $PWD/7005/conf/redis.conf:/etc/redis/redis.conf:rw
    command: ["redis-server","/etc/redis/redis.conf"]
  redis-6:
    restart: always
    image: redis:latest
    container_name: redis-6
    environment:
      - TZ=Asia/Shanghai
    network_mode: "host"
    volumes:
      - $PWD/7006/data:/data:rw
      - $PWD/7006/conf/redis.conf:/etc/redis/redis.conf:rw
    command: ["redis-server","/etc/redis/redis.conf"]

       执行下面命令

docker-compose -f docker-compose.yml up -d

配置集群

       ip设置之前创建redis对应的机器ip和端口号，密码对应cluster-conf.conf中配置的masterauth。运行后需要添加一个yes

docker exec -it redis-1 \
redis-cli -a "123456" \
--cluster create \
10.10.20.133:7001 \
10.10.20.133:7002 \
10.10.20.133:7003 \
10.10.20.133:7004 \
10.10.20.133:7005 \
10.10.20.133:7006 \
--cluster-replicas 1

总结

       至此docker-compose配置redis多主多从完成。