docker搭建redis集群高可用分片
2022/1/23 19:04:23
本文主要是介绍docker搭建redis集群高可用分片，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
docker搭建redis集群高可用分片
- 创建redis集群的网卡
- 编写shell脚本，创建redis集群卷本机目录
- docker run启动6个容器(后面有脚本，可以在创建目录时同时启动容器)
- 容器秒退错误信息查看
- 进入其中一个容器配置redis分片集群
- redis-cli -c在容器内查看集群主从关系
- 高可用测试
- 插入值
- 删除操作节点
- 查看集群节点状态，并获取值
- 查看本机挂载目录
- shell脚本执行创建数据卷目录及运行6容器
创建redis集群的网卡
docker network create redis --subnet 192.169.0.0/16
运行输出查看网卡
[root@VM-0-3-centos pdx_haokai]# docker network create redis --subnet 192.169.0.0/16 d9437fa2e1bbc7101badf40ba17a9c8f551e0bc40bfc85ea79875fe641015f78 [root@VM-0-3-centos pdx_haokai]# docker network ls NETWORK ID NAME DRIVER SCOPE ed8612b1d525 bridge bridge local efbd70fbac53 host host local a8a455ea111c mynet bridge local 8b375c8baa85 none null local d9437fa2e1bb redis bridge local [root@VM-0-3-centos pdx_haokai]#
编写shell脚本，创建redis集群卷本机目录
# 通过脚本创建6个redis配置
for port in $(seq 1 6); \
do \
mkdir -p /home/pdx_haokai/mydata/redis/node-${port}/conf
touch /home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf
cat << EQF >/home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf
port 6379
bind 0.0.0.0
cluster-enabled yes
cluster-config-file nodes-conf
cluster-announce-ip 192.169.0.1${port}
cluster-announce-port 6379
cluster-announce-bus-port 16379
appendonly yes
EQF
done
创建完后，目录结构是这样的
[root@VM-0-3-centos pdx_haokai]# for port in $(seq 1 6); \
> do \
> mkdir -p /home/pdx_haokai/mydata/redis/node-${port}/conf
> touch /home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf
> cat << EQF >/home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf
> port 6379
> bind 0.0.0.0
> cluster-enbaled yes
> cluster-config-file nodes-conf
> cluster-announce-ip 192.169.0.1${port}
> cluster-announce-port 6379
> cluster-announce-bus-port 16379
> appendonly yes
> EQF
> done
[root@VM-0-3-centos pdx_haokai]# cd mydata/
[root@VM-0-3-centos mydata]# ll
total 4
drwxr-xr-x 8 root root 4096 Jan 23 14:58 redis
[root@VM-0-3-centos mydata]# cd redis/
[root@VM-0-3-centos redis]# ll
total 24
drwxr-xr-x 3 root root 4096 Jan 23 14:58 node-1
drwxr-xr-x 3 root root 4096 Jan 23 14:58 node-2
drwxr-xr-x 3 root root 4096 Jan 23 14:58 node-3
drwxr-xr-x 3 root root 4096 Jan 23 14:58 node-4
drwxr-xr-x 3 root root 4096 Jan 23 14:58 node-5
drwxr-xr-x 3 root root 4096 Jan 23 14:58 node-6
[root@VM-0-3-centos redis]# cd node-1
[root@VM-0-3-centos node-1]# ll
total 4
drwxr-xr-x 2 root root 4096 Jan 23 14:58 conf
[root@VM-0-3-centos node-1]#
docker run启动6个容器(后面有脚本，可以在创建目录时同时启动容器)
参数解析：
-p开启两个端口映射，一个外网交互，一个集群间通信
docker run -p 6371:6379 -p 16371:16379 --name redis-1 \ -v /home/pdx_haokai/mydata/redis/node-1/data:/data \ -v /home/pdx_haokai/mydata/redis/node-1/conf/redis.conf:/etc/redis/redis.conf \ -d --net redis --ip 192.169.0.11 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6372:6379 -p 16372:16379 --name redis-2 \ -v /home/pdx_haokai/mydata/redis/node-2/data:/data \ -v /home/pdx_haokai/mydata/redis/node-2/conf/redis.conf:/etc/redis/redis.conf \ -d --net redis --ip 192.169.0.12 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6373:6379 -p 16373:16379 --name redis-3 \ -v /home/pdx_haokai/mydata/redis/node-3/data:/data \ -v /home/pdx_haokai/mydata/redis/node-3/conf/redis.conf:/etc/redis/redis.conf \ -d --net redis --ip 192.169.0.13 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6374:6379 -p 16374:16379 --name redis-4 \ -v /home/pdx_haokai/mydata/redis/node-4/data:/data \ -v /home/pdx_haokai/mydata/redis/node-4/conf/redis.conf:/etc/redis/redis.conf \ -d --net redis --ip 192.169.0.14 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6375:6379 -p 16375:16379 --name redis-5 \ -v /home/pdx_haokai/mydata/redis/node-5/data:/data \ -v /home/pdx_haokai/mydata/redis/node-5/conf/redis.conf:/etc/redis/redis.conf \ -d --net redis --ip 192.169.0.15 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6376:6379 -p 16376:16379 --name redis-6 \ -v /home/pdx_haokai/mydata/redis/node-6/data:/data \ -v /home/pdx_haokai/mydata/redis/node-6/conf/redis.conf:/etc/redis/redis.conf \ -d --net redis --ip 192.169.0.16 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
运行输出：
[root@VM-0-3-centos pdx_haokai]# docker run -p 6371:6379 -p 16371:16379 --name redis-1 \ > -v /home/pdx_haokai/mydata/redis/node-1/data:/data \ > -v /home/pdx_haokai/mydata/redis/node-1/conf/redis.conf:/etc/redis/redis.conf \ > -d --net redis --ip 192.169.0.11 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf e4b93f0e6623495a61f5a16fc0caa96ab39cc9d390d9ab6b4f1ff10be5b78b96 [root@VM-0-3-centos pdx_haokai]# docker run -p 6372:6379 -p 16372:16379 --name redis-2 \ > -v /home/pdx_haokai/mydata/redis/node-2/data:/data \ > -v /home/pdx_haokai/mydata/redis/node-2/conf/redis.conf:/etc/redis/redis.conf \ > -d --net redis --ip 192.169.0.12 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf 54f77d59dc984e175b8181bb90a53e586620ad0ec5720ad3de41bc4e22426e33 [root@VM-0-3-centos pdx_haokai]# docker run -p 6373:6379 -p 16373:16379 --name redis-3 \ > -v /home/pdx_haokai/mydata/redis/node-3/data:/data \ > -v /home/pdx_haokai/mydata/redis/node-3/conf/redis.conf:/etc/redis/redis.conf \ > -d --net redis --ip 192.169.0.13 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf d69a7619d388b78052431c8ba840969a21375b22e6863f4e8b15d64ea44a0d7a [root@VM-0-3-centos pdx_haokai]# docker run -p 6374:6379 -p 16374:16379 --name redis-4 \ > -v /home/pdx_haokai/mydata/redis/node-4/data:/data \ > -v /home/pdx_haokai/mydata/redis/node-4/conf/redis.conf:/etc/redis/redis.conf \ > -d --net redis --ip 192.169.0.14 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf 2ecbb5c4f6d861394db8c9d49612266a5ec8491ce1b9980675c1b0665a06728d [root@VM-0-3-centos pdx_haokai]# docker run -p 6375:6379 -p 16375:16379 --name redis-5 \ > -v /home/pdx_haokai/mydata/redis/node-5/data:/data \ > -v /home/pdx_haokai/mydata/redis/node-5/conf/redis.conf:/etc/redis/redis.conf \ > -d --net redis --ip 192.169.0.15 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf 280a424940c6c64d3e4a7d0dd7bdba9cd41ea7fadad770056f5bedb69345bc90 [root@VM-0-3-centos pdx_haokai]# docker run -p 6376:6379 -p 16376:16379 --name redis-6 \ > -v /home/pdx_haokai/mydata/redis/node-6/data:/data \ > -v /home/pdx_haokai/mydata/redis/node-6/conf/redis.conf:/etc/redis/redis.conf \ > -d --net redis --ip 192.169.0.16 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf 80fc041e1be3f13e9569edb4d726582cfa5573171c1008c6fd7e03a3cc10f225 [root@VM-0-3-centos pdx_haokai]#
容器秒退错误信息查看
如果启动容器秒退，代表出错了，可以使用docker start -i 容器id可以看到报错内容，然后解决
[root@VM-0-3-centos pdx_haokai]# docker start -i e4b93f0e6623 *** FATAL CONFIG FILE ERROR *** Reading the configuration file, at line 3 >>> 'cluster-enbaled yes' Bad directive or wrong number of arguments [root@VM-0-3-centos pdx_haokai]#
进入其中一个容器配置redis分片集群
redis-cli：代表redis单机模式
redis-cli -c：代表redis集群模式
cluster-replicas：表示分片，replicas 1 表示我们希望为集群中的每个主节点创建一个从节点，不设置分片的话，所有节点都是master。
这里进入使用的是 docker exec -it 容器id /bin/sh，因为redis容器里没有/bin/bash。
/data # redis-cli --cluster create 192.169.0.11:6379 192.169.0.12:6379 192.169.0.13:6379 192.169.0.14:6379 192.169.0.15:6379 192.169.0.16:6379 --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 192.169.0.15:6379 to 192.169.0.11:6379 Adding replica 192.169.0.16:6379 to 192.169.0.12:6379 Adding replica 192.169.0.14:6379 to 192.169.0.13:6379 M: f7388d712ae5b4a8a98ba387b10d5b1d92d124d4 192.169.0.11:6379 slots:[0-5460] (5461 slots) master M: 77592714f18f0c3f2d69a6990f4693cf3eeab888 192.169.0.12:6379 slots:[5461-10922] (5462 slots) master M: 3b045ff15b78a11509b52b29a65c5734be24244f 192.169.0.13:6379 slots:[10923-16383] (5461 slots) master S: dc513257ce71957a51850299edb024e0cc83103d 192.169.0.14:6379 replicates 3b045ff15b78a11509b52b29a65c5734be24244f S: 23fb54d508fb13e1a669a6ee77f0e14e0bcc67ca 192.169.0.15:6379 replicates f7388d712ae5b4a8a98ba387b10d5b1d92d124d4 S: 8336d457035058752e4f703f3ead3dc355305966 192.169.0.16:6379 replicates 77592714f18f0c3f2d69a6990f4693cf3eeab888 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 192.169.0.11:6379) M: f7388d712ae5b4a8a98ba387b10d5b1d92d124d4 192.169.0.11:6379 slots:[0-5460] (5461 slots) master 1 additional replica(s) S: dc513257ce71957a51850299edb024e0cc83103d 192.169.0.14:6379 slots: (0 slots) slave replicates 3b045ff15b78a11509b52b29a65c5734be24244f M: 3b045ff15b78a11509b52b29a65c5734be24244f 192.169.0.13:6379 slots:[10923-16383] (5461 slots) master 1 additional replica(s) S: 8336d457035058752e4f703f3ead3dc355305966 192.169.0.16:6379 slots: (0 slots) slave replicates 77592714f18f0c3f2d69a6990f4693cf3eeab888 M: 77592714f18f0c3f2d69a6990f4693cf3eeab888 192.169.0.12:6379 slots:[5461-10922] (5462 slots) master 1 additional replica(s) S: 23fb54d508fb13e1a669a6ee77f0e14e0bcc67ca 192.169.0.15:6379 slots: (0 slots) slave replicates f7388d712ae5b4a8a98ba387b10d5b1d92d124d4 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered. /data #
redis-cli -c在容器内查看集群主从关系
/data # 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:583 cluster_stats_messages_pong_sent:596 cluster_stats_messages_sent:1179 cluster_stats_messages_ping_received:591 cluster_stats_messages_pong_received:583 cluster_stats_messages_meet_received:5 cluster_stats_messages_received:1179 127.0.0.1:6379> cluster nodes dc513257ce71957a51850299edb024e0cc83103d 192.169.0.14:6379@16379 slave 3b045ff15b78a11509b52b29a65c5734be24244f 0 1642930532000 4 connected 3b045ff15b78a11509b52b29a65c5734be24244f 192.169.0.13:6379@16379 master - 0 1642930533000 3 connected 10923-16383 8336d457035058752e4f703f3ead3dc355305966 192.169.0.16:6379@16379 slave 77592714f18f0c3f2d69a6990f4693cf3eeab888 0 1642930533807 6 connected f7388d712ae5b4a8a98ba387b10d5b1d92d124d4 192.169.0.11:6379@16379 myself,master - 0 1642930534000 1 connected 0-5460 77592714f18f0c3f2d69a6990f4693cf3eeab888 192.169.0.12:6379@16379 master - 0 1642930532805 2 connected 5461-10922 23fb54d508fb13e1a669a6ee77f0e14e0bcc67ca 192.169.0.15:6379@16379 slave f7388d712ae5b4a8a98ba387b10d5b1d92d124d4 0 1642930534811 5 connected 127.0.0.1:6379>
高可用测试
redis主从高可用，保证主节点挂掉，从节点会自动通过选举成为主节点，同时各节点数据主从复制。
插入值
可以看到这里是哪个节点去执行的操作
127.0.0.1:6379> set a b -> Redirected to slot [15495] located at 192.169.0.13:6379 OK 192.169.0.13:6379>
删除操作节点
把192.169.0.13这台容器停掉
[root@VM-0-3-centos pdx_haokai]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3bbef75d54ab redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:6376->6379/tcp, :::6376->6379/tcp, 0.0.0.0:16376->16379/tcp, :::16376->16379/tcp redis-6 93964b0af24c redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:6375->6379/tcp, :::6375->6379/tcp, 0.0.0.0:16375->16379/tcp, :::16375->16379/tcp redis-5 428cf378b4e8 redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:6374->6379/tcp, :::6374->6379/tcp, 0.0.0.0:16374->16379/tcp, :::16374->16379/tcp redis-4 9eb3ddaf7b7e redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:6373->6379/tcp, :::6373->6379/tcp, 0.0.0.0:16373->16379/tcp, :::16373->16379/tcp redis-3 e434d767a593 redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:6372->6379/tcp, :::6372->6379/tcp, 0.0.0.0:16372->16379/tcp, :::16372->16379/tcp redis-2 a4acd5a31089 redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:6371->6379/tcp, :::6371->6379/tcp, 0.0.0.0:16371->16379/tcp, :::16371->16379/tcp redis-1 [root@VM-0-3-centos pdx_haokai]# docker stop 9eb3ddaf7b7e 9eb3ddaf7b7e [root@VM-0-3-centos pdx_haokai]#
查看集群节点状态，并获取值
原节点主从关系:
14由从节点被选举为主节点：
127.0.0.1:6379> cluster nodes dc513257ce71957a51850299edb024e0cc83103d 192.169.0.14:6379@16379 master - 0 1642931001000 7 connected 10923-16383 3b045ff15b78a11509b52b29a65c5734be24244f 192.169.0.13:6379@16379 master,fail - 1642930899733 1642930897000 3 connected 8336d457035058752e4f703f3ead3dc355305966 192.169.0.16:6379@16379 slave 77592714f18f0c3f2d69a6990f4693cf3eeab888 0 1642931001870 6 connected f7388d712ae5b4a8a98ba387b10d5b1d92d124d4 192.169.0.11:6379@16379 myself,master - 0 1642930998000 1 connected 0-5460 77592714f18f0c3f2d69a6990f4693cf3eeab888 192.169.0.12:6379@16379 master - 0 1642930999000 2 connected 5461-10922 23fb54d508fb13e1a669a6ee77f0e14e0bcc67ca 192.169.0.15:6379@16379 slave f7388d712ae5b4a8a98ba387b10d5b1d92d124d4 0 1642931000867 5 connected 127.0.0.1:6379> get a -> Redirected to slot [15495] located at 192.169.0.14:6379 "b" 192.169.0.14:6379>
查看本机挂载目录
[pdx_haokai@VM-0-3-centos redis]$ cd node-1 [pdx_haokai@VM-0-3-centos node-1]$ ll total 8 drwxr-xr-x 2 root root 4096 Jan 23 15:45 conf drwxr-xr-x 2 polkitd root 4096 Jan 23 17:25 data [pdx_haokai@VM-0-3-centos node-1]$ cd data/ [pdx_haokai@VM-0-3-centos data]$ ll total 8 -rw-r--r-- 1 polkitd pdx_haokai 0 Jan 23 15:46 appendonly.aof -rw-r--r-- 1 polkitd pdx_haokai 175 Jan 23 17:25 dump.rdb -rw-r--r-- 1 polkitd pdx_haokai 778 Jan 23 17:41 nodes-conf [pdx_haokai@VM-0-3-centos data]$
shell脚本执行创建数据卷目录及运行6容器
参数解析：
-p开启两个端口映射，一个外网交互，一个集群间通信
# 通过脚本创建6个redis配置并运行容器
for port in $(seq 1 6); \
do \
mkdir -p /home/pdx_haokai/mydata/redis/node-${port}/conf
touch /home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf
cat << EQF >/home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf
port 6379
bind 0.0.0.0
cluster-enabled yes
cluster-config-file nodes-conf
cluster-announce-ip 192.169.0.1${port}
cluster-announce-port 6379
cluster-announce-bus-port 16379
appendonly yes
EQF
docker run -p 637${port}:6379 -p 1637${port}:16379 --name redis-${port} \
-v /home/pdx_haokai/mydata/redis/node-${port}/data:/data \
-v /home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 192.169.0.1${port} redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
done
运行输出：
[root@VM-0-3-centos pdx_haokai]# for port in $(seq 1 6); \
> do \
> mkdir -p /home/pdx_haokai/mydata/redis/node-${port}/conf
> touch /home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf
> cat << EQF >/home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf
> port 6379
> bind 0.0.0.0
> cluster-enabled yes
> cluster-config-file nodes-conf
> cluster-announce-ip 192.169.0.1${port}
> cluster-announce-port 6379
> cluster-announce-bus-port 16379
> appendonly yes
> EQF
> docker run -p 637${port}:6379 -p 1637${port}:16379 --name redis-${port} \
> -v /home/pdx_haokai/mydata/redis/node-${port}/data:/data \
> -v /home/pdx_haokai/mydata/redis/node-${port}/conf/redis.conf:/etc/redis/redis.conf \
> -d --net redis --ip 192.169.0.1${port} redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
> done
a4acd5a310898b6deafe4b9cfe76253d49de68e41e6b9322d296e20008262622
e434d767a593b993c485560084f39d000c67f9795d5896db140d57d86a99b833
9eb3ddaf7b7ebcde99370b2ebbbadfe1d945b943fd4c8f23c44432a6b3c04dbc
428cf378b4e88e4c9825e17cfb836213d3c34ae9f31ec64eb2f0472d891d4323
93964b0af24cc7c22f4d7f7afafc29591142312f160c2ef51146ae62c3173caf
3bbef75d54ab9eb929274c7628076d1305414954bf8e669a16d7ceedbc6a364e
[root@VM-0-3-centos pdx_haokai]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3bbef75d54ab redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 11 seconds ago Up 9 seconds 0.0.0.0:6376->6379/tcp, :::6376->6379/tcp, 0.0.0.0:16376->16379/tcp, :::16376->16379/tcp redis-6
93964b0af24c redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 11 seconds ago Up 10 seconds 0.0.0.0:6375->6379/tcp, :::6375->6379/tcp, 0.0.0.0:16375->16379/tcp, :::16375->16379/tcp redis-5
428cf378b4e8 redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 12 seconds ago Up 10 seconds 0.0.0.0:6374->6379/tcp, :::6374->6379/tcp, 0.0.0.0:16374->16379/tcp, :::16374->16379/tcp redis-4
9eb3ddaf7b7e redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 12 seconds ago Up 11 seconds 0.0.0.0:6373->6379/tcp, :::6373->6379/tcp, 0.0.0.0:16373->16379/tcp, :::16373->16379/tcp redis-3
e434d767a593 redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 13 seconds ago Up 11 seconds 0.0.0.0:6372->6379/tcp, :::6372->6379/tcp, 0.0.0.0:16372->16379/tcp, :::16372->16379/tcp redis-2
a4acd5a31089 redis:5.0.9-alpine3.11 "docker-entrypoint.s…" 13 seconds ago Up 12 seconds 0.0.0.0:6371->6379/tcp, :::6371->6379/tcp, 0.0.0.0:16371->16379/tcp, :::16371->16379/tcp redis-1
[root@VM-0-3-centos pdx_haokai]#
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