搭建环境
- docker 镜像redis5
搭建过程
- 配置文件
Docker-compose.yml
version: "3.6"
services: # 代表就是一组服务 - 简单来说一组容器
redis_200: # 这个表示服务的名称，课自定义; 注意不是容器名称
image: redis_debin # 指定容器的镜像文件
networks: ## 引入外部预先定义的网段
cluster_net:
ipv4_address: 192.168.3.200 #设置ip地址
container_name: redis5_cluster_200 # 这是容器的名称
ports: # 配置容器与宿主机的端口
- "6320:6379"
- "16320:16379"
volumes: # 配置数据挂载
- /Users/jihan/docker/cluster/redis5/200:/redis
# command: top
command: /usr/local/bin/redis-server /redis/conf/redis.conf
redis_201: # 这个表示服务的名称，课自定义; 注意不是容器名称
image: redis_debin # 指定容器的镜像文件
networks: ## 引入外部预先定义的网段
cluster_net:
ipv4_address: 192.168.3.201 #设置ip地址
container_name: redis5_cluster_201 # 这是容器的名称
ports: # 配置容器与宿主机的端口
- "6321:6379"
- "16321:16379"
volumes: # 配置数据挂载
- /Users/jihan/docker/cluster/redis5/201:/redis
# command: top
command: /usr/local/bin/redis-server /redis/conf/redis.conf
redis_202: # 这个表示服务的名称，课自定义; 注意不是容器名称
image: redis_debin # 指定容器的镜像文件
networks: ## 引入外部预先定义的网段
cluster_net:
ipv4_address: 192.168.3.202 #设置ip地址
container_name: redis5_cluster_202 # 这是容器的名称
ports: # 配置容器与宿主机的端口
- "6322:6379"
- "16322:16379"
volumes: # 配置数据挂载
- /Users/jihan/docker/cluster/redis5/202:/redis
# command: top
command: /usr/local/bin/redis-server /redis/conf/redis.conf
redis_203: # 这个表示服务的名称，课自定义; 注意不是容器名称
image: redis_debin # 指定容器的镜像文件
networks: ## 引入外部预先定义的网段
cluster_net:
ipv4_address: 192.168.3.203 #设置ip地址
container_name: redis5_cluster_203 # 这是容器的名称
ports: # 配置容器与宿主机的端口
- "6323:6379"
- "16323:16379"
volumes: # 配置数据挂载
- /Users/jihan/docker/cluster/redis5/203:/redis
# command: top
command: /usr/local/bin/redis-server /redis/conf/redis.conf
redis_204: # 这个表示服务的名称，课自定义; 注意不是容器名称
image: redis_debin # 指定容器的镜像文件
networks: ## 引入外部预先定义的网段
cluster_net:
ipv4_address: 192.168.3.204 #设置ip地址
container_name: redis5_cluster_204 # 这是容器的名称
ports: # 配置容器与宿主机的端口
- "6324:6379"
- "16324:16379"
volumes: # 配置数据挂载
- /Users/jihan/docker/cluster/redis5/204:/redis
# command: top
command: /usr/local/bin/redis-server /redis/conf/redis.conf
redis_205: # 这个表示服务的名称，课自定义; 注意不是容器名称
image: redis_debin # 指定容器的镜像文件
networks: ## 引入外部预先定义的网段
cluster_net:
ipv4_address: 192.168.3.205 #设置ip地址
container_name: redis5_cluster_205 # 这是容器的名称
ports: # 配置容器与宿主机的端口
- "6325:6379"
- "16325:16379"
volumes: # 配置数据挂载
- /Users/jihan/docker/cluster/redis5/205:/redis
# command: top
command: /usr/local/bin/redis-server /redis/conf/redis.conf
# 网段设置
networks:
#引用外部预先定义好的网段
cluster_net:
external:
name: cluster_net
提前条件：1. 准备redis5镜像，镜像中默认创建 /redis 目录，用于挂载redis共享文件目录
2. 构建
$ docker-compose up -d
Creating redis5_cluster_204 ... done
Creating redis5_cluster_200 ... done
Creating redis5_cluster_203 ... done
Creating redis5_cluster_202 ... done
Creating redis5_cluster_205 ... done
Creating redis5_cluster_201 ... done
- 启动
$ docker-compose start
Starting redis_200 ... done
Starting redis_201 ... done
Starting redis_202 ... done
Starting redis_203 ... done
Starting redis_204 ... done
Starting redis_205 ... done
查看是否启动成功
$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b0ed507d505f redis_debin "docker-entrypoint.s…" 15 seconds ago Up 14 seconds 0.0.0.0:6320->6379/tcp, 0.0.0.0:16320->16379/tcp redis5_cluster_200
52a158fef97a redis_debin "docker-entrypoint.s…" 15 seconds ago Up 14 seconds 0.0.0.0:6325->6379/tcp, 0.0.0.0:16325->16379/tcp redis5_cluster_205
b817794cfaa8 redis_debin "docker-entrypoint.s…" 15 seconds ago Up 14 seconds 0.0.0.0:6324->6379/tcp, 0.0.0.0:16324->16379/tcp redis5_cluster_204
77a37266d46a redis_debin "docker-entrypoint.s…" 15 seconds ago Up 14 seconds 0.0.0.0:6321->6379/tcp, 0.0.0.0:16321->16379/tcp redis5_cluster_201
c52d44b26bf2 redis_debin "docker-entrypoint.s…" 15 seconds ago Up 14 seconds 0.0.0.0:6322->6379/tcp, 0.0.0.0:16322->16379/tcp redis5_cluster_202
35a442807dcc redis_debin "docker-entrypoint.s…" 15 seconds ago Up 14 seconds 0.0.0.0:6323->6379/tcp, 0.0.0.0:16323->16379/tcp redis5_cluster_203
4 . 挑一个容器查看是否有开启集群配置
$ docker exec -ti b0ed507d505f /bin/bash
root@b0ed507d505f:/data# cat /redis/log/nodes.conf
d40ed1db40261c4f5a37410eeb828d4958769caf :0@0 myself,master - 0 0 0 connected
vars currentEpoch 0 lastVoteEpoch 0
- 命令启动各个节点进分配槽
$ docker exec -ti 73a402d74494 /bin/bash
root@73a402d74494:/data# redis-cli --cluster create 192.168.3.200:6379 192.168.3.201:6379 192.168.3.202:6379 192.168.3.203:6379 192.168.3.204:6379 192.168.3.205:6379 --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 192.168.3.204:6379 to 192.168.3.200:6379
Adding replica 192.168.3.205:6379 to 192.168.3.201:6379
Adding replica 192.168.3.203:6379 to 192.168.3.202:6379
M: f4d24c9b4ed5142884451410c5eca71416b7202b 192.168.3.200:6379
slots:[0-5460] (5461 slots) master
M: cc60b1a75abc777fc2712125112082780fb8f1fb 192.168.3.201:6379
slots:[5461-10922] (5462 slots) master
M: 9c3bb8fe85725d741ffc0cb7dfa2e92015ec4543 192.168.3.202:6379
slots:[10923-16383] (5461 slots) master
S: 655584d4982243a9ae025c3cecaf9e292dda18e1 192.168.3.203:6379
replicates 9c3bb8fe85725d741ffc0cb7dfa2e92015ec4543
S: 9db4e65ea94a8f9ed6e374b02831168a5e75831a 192.168.3.204:6379
replicates f4d24c9b4ed5142884451410c5eca71416b7202b
S: 011f6c7c2ecf4ac6bed088369707fd5ede9d519a 192.168.3.205:6379
replicates cc60b1a75abc777fc2712125112082780fb8f1fb
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 192.168.3.200:6379)
M: f4d24c9b4ed5142884451410c5eca71416b7202b 192.168.3.200:6379
slots:[0-5460] (5461 slots) master
1 additional replica(s)
S: 9db4e65ea94a8f9ed6e374b02831168a5e75831a 192.168.3.204:6379
slots: (0 slots) slave
replicates f4d24c9b4ed5142884451410c5eca71416b7202b
M: cc60b1a75abc777fc2712125112082780fb8f1fb 192.168.3.201:6379
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
S: 655584d4982243a9ae025c3cecaf9e292dda18e1 192.168.3.203:6379
slots: (0 slots) slave
replicates 9c3bb8fe85725d741ffc0cb7dfa2e92015ec4543
S: 011f6c7c2ecf4ac6bed088369707fd5ede9d519a 192.168.3.205:6379
slots: (0 slots) slave
replicates cc60b1a75abc777fc2712125112082780fb8f1fb
M: 9c3bb8fe85725d741ffc0cb7dfa2e92015ec4543 192.168.3.202:6379
slots:[10923-16383] (5461 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.
注意：
由于过程中出现配置分配槽命令漏了给各个节点分配一个从节点，重新配置时出现最下面第问题，所以重新构建第各个节点，因此下面容器ID与上面不一样
问题
root@df2aa36ec786:/data# redis-cli --cluster create 192.168.3.200:6379 192.168.3.201:6379 192.168.3.202:6379 192.168.3.203:6379 192.168.3.204:6379 192.168.3.205:6379 --cluster-replicas 1
[ERR] Node 192.168.3.200:6379 is not empty. Either the node already knows other nodes (check with CLUSTER NODES) or contains some key in database 0.
清楚aof dump.rdb文件，进入各个节点flushall 清楚数据库