9、Docker网络部署redis集群

1、创建redis集群网络

docker network create redis --subnet 172.38.0.0/16

2、通过脚本创建六个redis配置

for port in $(seq 1 6); \
do \
mkdir -p /mydata/redis/node-${port}/conf
touch /mydata/redis/node-${port}/conf/redis.conf
cat << EOF >/mydata/redis/node-${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

3、docker启动配置好的六个redis服务

redis服务1：
docker run -p 6371:6379 -p 16371:16379 --name redis-1 \
-v /mydata/redis/node-1/data:/data \
-v /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

redis服务2：
docker run -p 6372:6379 -p 16372:16379 --name redis-2 \
-v /mydata/redis/node-2/data:/data \
-v /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

redis服务3：
docker run -p 6373:6379 -p 16373:16379 --name redis-3 \
-v /mydata/redis/node-3/data:/data \
-v /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

redis服务4：
docker run -p 6374:6379 -p 16374:16379 --name redis-4 \
-v /mydata/redis/node-4/data:/data \
-v /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

redis服务5：
docker run -p 6375:6379 -p 16375:16379 --name redis-5 \
-v /mydata/redis/node-5/data:/data \
-v /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

redis服务6：
docker run -p 6376:6379 -p 16376:16379 --name redis-6 \
-v /mydata/redis/node-6/data:/data \
-v /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

4、搭建集群

（1）、随意挑选一个redis服务，进入
docker exec -it redis-1 /bin/sh
（2）、设置集群
设置集群
redis-cli --cluster create 172.38.0.11:6379 172.38.0.12:6379 172.38.0.13:6379 172.38.0.14:6379 172.38.0.15:6379 172.38.0.16:6379 --cluster-replicas 1
查看集群信息
redis-cli -c进入集群
cluster info查看集群信息
cluster nodes查看集群节点

> cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_ping_sent:223
cluster_stats_messages_pong_sent:226
cluster_stats_messages_sent:449
cluster_stats_messages_ping_received:221
cluster_stats_messages_pong_received:223
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:449

> cluster nodes
223e87330b7bf607bc5e4479963c0d651fd1e904 172.38.0.13:6379@16379 master - 0 1628475205000 3 connected 10923-16383
5c0951a4c219513151ce912cb3c503545a1b112e 172.38.0.15:6379@16379 slave d545ebfc7e064995f4479f72bc64e3a14cb7bb75 0 1628475206164 5 connected
30f844f9364811371073f16c682661dda79046a7 172.38.0.14:6379@16379 slave 223e87330b7bf607bc5e4479963c0d651fd1e904 0 1628475205154 4 connected
854701ecb046e6e8f22dd27dc4a65d6fc74397b1 172.38.0.12:6379@16379 master - 0 1628475206567 2 connected 5461-10922
74d6cd1594c845b06a9567e0d823a157a128ac72 172.38.0.16:6379@16379 slave 854701ecb046e6e8f22dd27dc4a65d6fc74397b1 0 1628475206000 6 connected
d545ebfc7e064995f4479f72bc64e3a14cb7bb75 172.38.0.11:6379@16379 myself,master - 0 1628475205000 1 connected 0-5460

5、测试集群可用

redis-cli -c 进入集群
set test abc 在集群内赋值

> set test abc
-> Redirected to slot [6918] located at 172.38.0.12:6379
OK

docker stop redis-2停掉存储值的主服务器，看是否能到从服务器上获取到数据

> cluster nodes
223e87330b7bf607bc5e4479963c0d651fd1e904 172.38.0.13:6379@16379 master - 0 1628476022725 3 connected 10923-16383
5c0951a4c219513151ce912cb3c503545a1b112e 172.38.0.15:6379@16379 slave d545ebfc7e064995f4479f72bc64e3a14cb7bb75 0 1628476021718 5 connected
30f844f9364811371073f16c682661dda79046a7 172.38.0.14:6379@16379 slave 223e87330b7bf607bc5e4479963c0d651fd1e904 0 1628476022523 4 connected
854701ecb046e6e8f22dd27dc4a65d6fc74397b1 172.38.0.12:6379@16379 master,fail - 1628475942951 1628475942550 2 connected
74d6cd1594c845b06a9567e0d823a157a128ac72 172.38.0.16:6379@16379 master - 0 1628476021000 8 connected 5461-10922
d545ebfc7e064995f4479f72bc64e3a14cb7bb75 172.38.0.11:6379@16379 myself,master - 0 1628476021000 1 connected 0-5460

> get test
-> Redirected to slot [6918] located at 172.38.0.16:6379
"abc"

在原来的从机redis-6上成功获取，则集群部署成功