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Docker搭建Redis Cluster集群的教程详解

作者:微技术之家

这篇文章主要为大家详细介绍了Docker搭建Redis Cluster集群的相关知识,文中的示例代码讲解详细,具有一定的借鉴价值,有需要的可以参考下

Redis Cluster采用无中心结构,每个节点保存数据和整个集群状态,每个节点都和其他所有节点连接。

Redis Cluster提供了一种运行Redis安装的方法,在该安装中,数据会 在多个Redis节点之间自动分片。Redis Cluster 在分区期间还提供了一定程度的可用性,这实际上是在某些节点出现故障或无法通信时继续操作的能力。但是,如果发生较大故障(例如,大多数主服务器不可用时),集群将停止运行。Redis Cluster自动分割在多个节点之间的数据集,一部分节点出现故障或无法与集群的其余部分通信时,继续运行的能力。

创建网卡

docker network create redis --subnet 172.28.0.0/16

Redis配置

通过脚本创建6个 redis 配置

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

运行容器

# 容器1
docker run -p 6371:6379 -p 16371:16379 --name redis-1 \
-v ~/redis/node-1/data:/data \
-v ~/redis/node-1/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.11 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
# 容器2
docker run -p 6372:6379 -p 16372:16379 --name redis-2 \
-v ~/redis/node-2/data:/data \
-v ~/redis/node-2/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.12 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
# 容器3
docker run -p 6373:6379 -p 16373:16379 --name redis-3 \
-v ~/redis/node-3/data:/data \
-v ~/redis/node-3/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.13 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
# 容器4
docker run -p 6374:6379 -p 16374:16379 --name redis-4 \
-v ~/redis/node-4/data:/data \
-v ~/redis/node-4/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.14 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
# 容器5
docker run -p 6375:6379 -p 16375:16379 --name redis-5 \
-v ~/redis/node-5/data:/data \
-v ~/redis/node-5/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.15 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
# 容器6
docker run -p 6376:6379 -p 16376:16379 --name redis-6 \
-v ~/redis/node-6/data:/data \
-v ~/redis/node-6/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.28.0.16 redis:5.0.9-alpine3.11 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
>>> 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: cfb09d104f563d5dea870437cf73fac266b69a30 172.28.0.11:6379
   slots:[0-5460] (5461 slots) master
M: 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 172.28.0.12:6379
   slots:[5461-10922] (5462 slots) master
M: be4034133574260765165beac5fd1edacb63a2bd 172.28.0.13:6379
   slots:[10923-16383] (5461 slots) master
S: 74685c90c5aebdc8a035d288c962e22f98e994e8 172.28.0.14:6379
   replicates be4034133574260765165beac5fd1edacb63a2bd
S: 96b4185cc40b532b144b2ac3e2fe7213e7c13a50 172.28.0.15:6379
   replicates cfb09d104f563d5dea870437cf73fac266b69a30
S: edd2e12510d921be2193df5b461033fc0f465144 172.28.0.16:6379
   replicates 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c
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: cfb09d104f563d5dea870437cf73fac266b69a30 172.28.0.11:6379
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
S: 96b4185cc40b532b144b2ac3e2fe7213e7c13a50 172.28.0.15:6379
   slots: (0 slots) slave
   replicates cfb09d104f563d5dea870437cf73fac266b69a30
S: edd2e12510d921be2193df5b461033fc0f465144 172.28.0.16:6379
   slots: (0 slots) slave
   replicates 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c
M: be4034133574260765165beac5fd1edacb63a2bd 172.28.0.13:6379
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
M: 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 172.28.0.12:6379
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
S: 74685c90c5aebdc8a035d288c962e22f98e994e8 172.28.0.14:6379
   slots: (0 slots) slave
   replicates be4034133574260765165beac5fd1edacb63a2bd
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
# 启动redis集群客户端(-c表示集群)
> redis-cli -c
# 查看集群信息
> 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:235
cluster_stats_messages_pong_sent:225
cluster_stats_messages_sent:460
cluster_stats_messages_ping_received:220
cluster_stats_messages_pong_received:235
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:460
# 集群创建好之后,11,12,13为主节点,其余为从节点
> cluster nodes
96b4185cc40b532b144b2ac3e2fe7213e7c13a50 172.28.0.15:6379@16379 slave cfb09d104f563d5dea870437cf73fac266b69a30 0 1596856234249 5 connected
edd2e12510d921be2193df5b461033fc0f465144 172.28.0.16:6379@16379 slave 47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 0 1596856234146 6 connected
cfb09d104f563d5dea870437cf73fac266b69a30 172.28.0.11:6379@16379 myself,master - 0 1596856232000 1 connected 0-5460
be4034133574260765165beac5fd1edacb63a2bd 172.28.0.13:6379@16379 master - 0 1596856233000 3 connected 10923-16383
47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 172.28.0.12:6379@16379 master - 0 1596856233000 2 connected 5461-10922
74685c90c5aebdc8a035d288c962e22f98e994e8 172.28.0.14:6379@16379 slave be4034133574260765165beac5fd1edacb63a2bd 0 1596856233230 4 connected

运行测试

添加Redis缓存

会返回所添加的对应的节点,如这里返回的是12的节点

set name weijishu
-> Redirected to slot [5798] located at 172.28.0.12:6379
OK

停止容器

停止刚添加缓存的对应的redis节点

docker stop redis-2

当主节点断开之后,会自动将从节点切换为主节点,比如这里将16切换为了主节点

cluster nodes
96b4185cc40b532b144b2ac3e2fe7213e7c13a50 172.28.0.15:6379@16379 slave cfb09d104f563d5dea870437cf73fac266b69a30 0 1596856365279 5 connected
edd2e12510d921be2193df5b461033fc0f465144 172.28.0.16:6379@16379 master - 0 1596856367324 7 connected 5461-10922
cfb09d104f563d5dea870437cf73fac266b69a30 172.28.0.11:6379@16379 myself,master - 0 1596856365000 1 connected 0-5460
be4034133574260765165beac5fd1edacb63a2bd 172.28.0.13:6379@16379 master - 0 1596856366814 3 connected 10923-16383
47d28c2cc92ce7fafbe09b14d521a35e56a2c02c 172.28.0.12:6379@16379 master,fail - 1596856348392 1596856346000 2 connected
74685c90c5aebdc8a035d288c962e22f98e994e8 172.28.0.14:6379@16379 slave be4034133574260765165beac5fd1edacb63a2bd 0 1596856366301 4 connected

获取缓存

如果能取到值,表示集群搭建成功,如下,从16这个节点中取到了值

get name
-> Redirected to slot [5798] located at 172.28.0.16:6379
"weijishu"

到此这篇关于Docker搭建Redis Cluster集群的教程详解的文章就介绍到这了,更多相关Docker搭建Redis Cluster集群内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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