这一节用docker来部署redis集群
1. 创建redis网络
批量创建多个redis配置文件的脚本如下
for port in (seq 1 6); \
do \
mkdir -p /root/mydata/redis/node-{port}/conf
touch /root/mydata/redis/node-{port}/conf/redis.conf
cat << EOF >/root/mydata/redis/node-{port}/conf/redis.conf
port 6379
bind 0.0.0.0
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
cluster-announce-ip 172.38.0.1${port}
cluster-announce-port 6379
cluster-announce-bus-port 16379
appendonly yes
EOF
done
2.脚本创建6个redis的节点并启动
1.启动节点（后面有启动redis节点的命令）
2.随便进入一个节点，并且创建集群
3.查看集群节点的信息
运行redis-cli -c进入集群
下面的代码是启动节点时用的，注意一下redis的目录
docker run -p 6371:6379 -p 16371:16379 --name redis-1 \
-v /root/mydata/redis/node-1/data:/data \
-v /root/mydata/redis/node-1/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.38.0.11 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6372:6379 -p 16372:16379 --name redis-2 \
-v /root/mydata/redis/node-2/data:/data \
-v /root/mydata/redis/node-2/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.38.0.12 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6373:6379 -p 16373:16379 --name redis-3 \
-v /root/mydata/redis/node-3/data:/data \
-v /root/mydata/redis/node-3/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.38.0.13 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6374:6379 -p 16374:16379 --name redis-4 \
-v /root/mydata/redis/node-4/data:/data \
-v /root/mydata/redis/node-4/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.38.0.14 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6375:6379 -p 16375:16379 --name redis-5 \
-v /root/mydata/redis/node-5/data:/data \
-v /root/mydata/redis/node-5/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.38.0.15 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6376:6379 -p 16376:16379 --name redis-6 \
-v /root/mydata/redis/node-6/data:/data \
-v /root/mydata/redis/node-6/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.38.0.16 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
3.停止一个redis容器服务，验证集群的高可用
验证成功，redis-3停止后，redis-4变成了master
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