Docker搭建Redis集群

docker命令

停用全部运行中的容器:
docker rm $(docker ps -aq)

删除全部容器：
docker rm $(docker ps -aq)

一条命令实现停用并删除容器
docker stop $(docker ps -q) & docker rm $(docker ps -aq)

创建网卡

docker network create redis --subnet 172.28.0.0/16

创建路径

# 路径可以随意创建，供参考
mkdir -p /usr/local/redis/redis-server

通过脚本创建配置

# 注意路径可以自定义

for port in $(seq 1 6); 
do 
mkdir -p /usr/local/redis/redis-server/node-${port}/conf
touch /usr/local/redis/redis-server/node-${port}/conf/redis.conf
cat << EOF > /usr/local/redis/redis-server/node-${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 172.28.0.1${port}
cluster-announce-port 6379
cluster-announce-bus-port 16379
appendonly yes
EOF
done

创建redis容器

# 可以指定版本，此处略
docker pull redis

# 查看镜像
docker images

# 容器1
docker run -p 6371:6379 -p 16371:16379 --name redis-1 
-v /usr/local/redis/redis-server/node-1/data:/data 
-v /usr/local/redis/redis-server/node-1/conf/redis.conf:/etc/redis/redis.conf 
-d --net redis --ip 172.28.0.11 redis:latest redis-server /etc/redis/redis.conf

# 容器2
docker run -p 6372:6379 -p 16372:16379 --name redis-2 
-v /usr/local/redis/redis-server/node-2/data:/data 
-v /usr/local/redis/redis-server/node-2/conf/redis.conf:/etc/redis/redis.conf 
-d --net redis --ip 172.28.0.12 redis:latest redis-server /etc/redis/redis.conf

# 容器3
docker run -p 6373:6379 -p 16373:16379 --name redis-3 
-v /usr/local/redis/redis-server/node-3/data:/data 
-v /usr/local/redis/redis-server/node-3/conf/redis.conf:/etc/redis/redis.conf 
-d --net redis --ip 172.28.0.13 redis:latest redis-server /etc/redis/redis.conf

# 容器4
docker run -p 6374:6379 -p 16374:16379 --name redis-4 
-v /usr/local/redis/redis-server/node-4/data:/data 
-v /usr/local/redis/redis-server/node-4/conf/redis.conf:/etc/redis/redis.conf 
-d --net redis --ip 172.28.0.14 redis:latest redis-server /etc/redis/redis.conf

# 容器5
docker run -p 6375:6379 -p 16375:16379 --name redis-5 
-v /usr/local/redis/redis-server/node-5/data:/data 
-v /usr/local/redis/redis-server/node-5/conf/redis.conf:/etc/redis/redis.conf 
-d --net redis --ip 172.28.0.15 redis:latest redis-server /etc/redis/redis.conf

# 容器6
docker run -p 6376:6379 -p 16376:16379 --name redis-6 
-v /usr/local/redis/redis-server/node-6/data:/data 
-v /usr/local/redis/redis-server/node-6/conf/redis.conf:/etc/redis/redis.conf 
-d --net redis --ip 172.28.0.16 redis:latest redis-server /etc/redis/redis.conf

创建集群

# 进入容器
> docker exec -it redis-1 /bin/sh

# 进入容器后，在容器中创建集群
> redis-cli --cluster create 172.28.0.11:6379 172.28.0.12:6379 172.28.0.13:6379 172.28.0.14:6379 172.28.0.15:6379 172.28.0.16:6379 --cluster-replicas 1

# 启动redis集群客户端（-c表示集群）
> redis-cli -c

# 查看集群信息
> cluster info

# 集群创建好之后，11，12，13为主节点，其余为从节点
> cluster nodes



# 如下所示
root@xiaoxinpro13:/usr/local/redis/redis-server# docker exec -it redis-1 /bin/sh
# redis-cli --cluster create 172.28.0.11:6379 172.28.0.12:6379 172.28.0.13:6379 172.28.0.14:6379 172.28.0.15:6379 172.28.0.16:6379 --cluster-replicas 1
>>> Performing hash slots allocation on 6 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 172.28.0.15:6379 to 172.28.0.11:6379
Adding replica 172.28.0.16:6379 to 172.28.0.12:6379
Adding replica 172.28.0.14:6379 to 172.28.0.13:6379
M: a0dffbde1db3979233483965ecfb9631c2029892 172.28.0.11:6379
   slots:[0-5460] (5461 slots) master
M: b83f375c33b264ae6c17e268a883dd7f1f6d4425 172.28.0.12:6379
   slots:[5461-10922] (5462 slots) master
M: 871d9b66fcccf717ffc90de4a7ae3809571f76d6 172.28.0.13:6379
   slots:[10923-16383] (5461 slots) master
S: 5918c1b458d893667e45327a43c7d769522839b4 172.28.0.14:6379
   replicates 871d9b66fcccf717ffc90de4a7ae3809571f76d6
S: 9fb4601f5276de6c7918455be9aa2ffe764cdb1e 172.28.0.15:6379
   replicates a0dffbde1db3979233483965ecfb9631c2029892
S: dee5019dd6e21daaa14d122f913961963c61c2b1 172.28.0.16:6379
   replicates b83f375c33b264ae6c17e268a883dd7f1f6d4425
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
.
>>> Performing Cluster Check (using node 172.28.0.11:6379)
M: a0dffbde1db3979233483965ecfb9631c2029892 172.28.0.11:6379
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
S: 9fb4601f5276de6c7918455be9aa2ffe764cdb1e 172.28.0.15:6379
   slots: (0 slots) slave
   replicates a0dffbde1db3979233483965ecfb9631c2029892
S: dee5019dd6e21daaa14d122f913961963c61c2b1 172.28.0.16:6379
   slots: (0 slots) slave
   replicates b83f375c33b264ae6c17e268a883dd7f1f6d4425
M: 871d9b66fcccf717ffc90de4a7ae3809571f76d6 172.28.0.13:6379
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
S: 5918c1b458d893667e45327a43c7d769522839b4 172.28.0.14:6379
   slots: (0 slots) slave
   replicates 871d9b66fcccf717ffc90de4a7ae3809571f76d6
M: b83f375c33b264ae6c17e268a883dd7f1f6d4425 172.28.0.12:6379
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
# redis-cli -c
127.0.0.1:6379> 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:68
cluster_stats_messages_pong_sent:77
cluster_stats_messages_sent:145
cluster_stats_messages_ping_received:72
cluster_stats_messages_pong_received:68
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:145
total_cluster_links_buffer_limit_exceeded:0
127.0.0.1:6379> cluster nodes
9fb4601f5276de6c7918455be9aa2ffe764cdb1e 172.28.0.15:6379@16379 slave a0dffbde1db3979233483965ecfb9631c2029892 0 1652712658970 1 connected
dee5019dd6e21daaa14d122f913961963c61c2b1 172.28.0.16:6379@16379 slave b83f375c33b264ae6c17e268a883dd7f1f6d4425 0 1652712658000 2 connected
871d9b66fcccf717ffc90de4a7ae3809571f76d6 172.28.0.13:6379@16379 master - 0 1652712657000 3 connected 10923-16383
a0dffbde1db3979233483965ecfb9631c2029892 172.28.0.11:6379@16379 myself,master - 0 1652712656000 1 connected 0-5460
5918c1b458d893667e45327a43c7d769522839b4 172.28.0.14:6379@16379 slave 871d9b66fcccf717ffc90de4a7ae3809571f76d6 0 1652712658000 3 connected
b83f375c33b264ae6c17e268a883dd7f1f6d4425 172.28.0.12:6379@16379 master - 0 1652712657000 2 connected 5461-10922
127.0.0.1:6379> 

Docker搭建Redis Cluster集群