使用docker搭建 redis cluster 集群

使用docker搭建redis-cluster集群

目录

1.拉取redis镜像

2.创建network

3.创建redis配置文件

4.创建redis容器

5.创建Redis Cluster集群

6.测试

1.拉取redis镜像

docker pull redis

2.创建network

docker容器创建的应用会默认使用 bridge，但是每次重启docker此网络的ip会动态变更，因此需要我们自己手动创建一个固定的network

#创建虚拟网卡
docker network create myredis
#查看虚拟网卡
docker network ls

其它虚拟网卡相关命令

#查看虚拟网卡详细信息
docker network inspect myredis
#删除虚拟网卡
docker network rm myredis

3.创建redis配置文件

需要创建多个redis.conf配置文件,采用shell脚本的方式创建

createConf.sh 脚本内容如下所示:

#!/bin/sh
​
for port in $(seq 6380 6385);
do
mkdir -p /home/ap/chenby/redisCluster/node-${port}/conf
touch /home/ap/chenby/redisCluster/node-${port}/conf/redis.conf
cat  << EOF > /home/ap/chenby/redisCluster/node-${port}/conf/redis.conf
#节点端口
port ${port}
#添加访问认证
requirepass 1234
#如果主节点开启了访问认证，从节点访问主节点需要认证
masterauth 1234
#保护模式，默认值 yes，即开启。开启保护模式以后，需配置 bind ip 或者设置访问密码；关闭保护模式，外部网络可以直接访问
protected-mode no
#bind 0.0.0.0
​
#是否以守护线程的方式启动（后台启动），默认 no
daemonize no
#是否开启 AOF 持久化模式，默认 no
appendonly yes
#是否开启集群模式，默认 no
cluster-enabled yes 
#集群节点信息文件
cluster-config-file nodes.conf
#群节点连接超时时间
cluster-node-timeout 5000
#集群节点 IP
cluster-announce-ip 192.168.137.103
#集群节点映射端口
cluster-announce-port ${port}
#集群节点总线端口
cluster-announce-bus-port 1${port}
EOF
done

执行脚本,运行结果如下:

4.创建redis容器

因为要创建多个容器,使用shell脚本的方式创建

redis.sh脚本内容:

#!/bin/sh
​
## 首次创建并运行redis容器
if [ "$1" = "create" ]; then
        for port in $(seq 6380 6385);
        do
              docker run -di --restart always --name redis-${port} --net myredis -p ${port}:${port} -p 1${port}:1${port} -v /home/ap/chenby/redisCluster/node-${port}/conf/redis.conf:/usr/local/etc/redis/redis.conf -v /home/ap/chenby/redisCluster/node-${port}/data:/data redis redis-server /usr/local/etc/redis/redis.conf
        done
fi
​
##停止redis容器
if [ "$1" = "stop" ]; then
        for port in $(seq 6380 6385);
        do
                docker stop redis-${port}
        done
fi
​
##启动已有的redis容器
if [ "$1" = "start" ]; then
        for port in $(seq 6380 6385);
        do
                docker start redis-${port}
        done
fi
​
## 删除redis容器
if [ "$1" = "rm" ]; then
        for port in $(seq 6380 6385);
        do
                docker rm redis-${port}
        done
fi

执行命令 : sh redis.sh create

结果如下图所示,证明创建成功

执行命令 docker ps -a 查看容器,如下图所示,证明创建并全部启动成功

5.创建Redis Cluster集群

5.1 任意选择一个redis节点进入,创建redis集群

进入redis-6380容器:

docker exec -it redis-6380 /bin/bash

5.2 创建集群

redis-cli -a 1234 --cluster create 192.168.137.103:6380 192.168.137.103:6381 192.168.137.103:6382 192.168.137.103:6383 192.168.137.103:6384 192.168.137.103:6385 --cluster-replicas 1

根据出现的信息,输入yes

创建成功如下:

root@c81e4c88ef59:/data# redis-cli -a 1234 --cluster create 192.168.137.103:6380 192.168.137.103:6381 192.168.137.103:6382 192.168.137.103:6383 192.168.137.103:6384 192.168.137.103:6385 --cluster-replicas 1
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
>>> Performing hash slots allocation on 6 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 192.168.137.103:6384 to 192.168.137.103:6380
Adding replica 192.168.137.103:6385 to 192.168.137.103:6381
Adding replica 192.168.137.103:6383 to 192.168.137.103:6382
>>> Trying to optimize slaves allocation for anti-affinity
[WARNING] Some slaves are in the same host as their master
M: 5de830891133b5621d06901d970ef84c026a6bd1 192.168.137.103:6380
   slots:[0-5460] (5461 slots) master
M: 39e4e1aa64ab168f0d875c0f187343382d7aadc0 192.168.137.103:6381
   slots:[5461-10922] (5462 slots) master
M: 30c40c7eb92bc3decdc9f8e0f7ac5c1d04865866 192.168.137.103:6382
   slots:[10923-16383] (5461 slots) master
S: 3049f1a9853529ca5cb2b0f9def43a1ae0b42064 192.168.137.103:6383
   replicates 5de830891133b5621d06901d970ef84c026a6bd1
S: 3638186047852a4c1d3c82805be3a2b46f63c235 192.168.137.103:6384
   replicates 39e4e1aa64ab168f0d875c0f187343382d7aadc0
S: 59260c049597ea1b2b05d61eb6c1e0c70de57b45 192.168.137.103:6385
   replicates 30c40c7eb92bc3decdc9f8e0f7ac5c1d04865866
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 192.168.137.103:6380)
M: 5de830891133b5621d06901d970ef84c026a6bd1 192.168.137.103:6380
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
M: 39e4e1aa64ab168f0d875c0f187343382d7aadc0 192.168.137.103:6381
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
S: 3638186047852a4c1d3c82805be3a2b46f63c235 192.168.137.103:6384
   slots: (0 slots) slave
   replicates 39e4e1aa64ab168f0d875c0f187343382d7aadc0
S: 59260c049597ea1b2b05d61eb6c1e0c70de57b45 192.168.137.103:6385
   slots: (0 slots) slave
   replicates 30c40c7eb92bc3decdc9f8e0f7ac5c1d04865866
S: 3049f1a9853529ca5cb2b0f9def43a1ae0b42064 192.168.137.103:6383
   slots: (0 slots) slave
   replicates 5de830891133b5621d06901d970ef84c026a6bd1
M: 30c40c7eb92bc3decdc9f8e0f7ac5c1d04865866 192.168.137.103:6382
   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.

5.3 查看节点相关信息

## 检查集群状态
redis-cli -a 1234 --cluster check 192.168.137.103:6382
## 连接集群某个节点
redis-cli -c -a 1234 -h 192.168.137.103 -p 6382
## 查看集群信息
cluster info
## 查看集群结点信息
cluster nodes

如下所示:

root@c81e4c88ef59:/data# redis-cli -a 1234 --cluster check 192.168.137.103:6382
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
192.168.137.103:6382 (30c40c7e...) -> 0 keys | 5461 slots | 1 slaves.
192.168.137.103:6380 (5de83089...) -> 0 keys | 5461 slots | 1 slaves.
192.168.137.103:6381 (39e4e1aa...) -> 0 keys | 5462 slots | 1 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average.
>>> Performing Cluster Check (using node 192.168.137.103:6382)
M: 30c40c7eb92bc3decdc9f8e0f7ac5c1d04865866 192.168.137.103:6382
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
M: 5de830891133b5621d06901d970ef84c026a6bd1 192.168.137.103:6380
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
S: 59260c049597ea1b2b05d61eb6c1e0c70de57b45 192.168.137.103:6385
   slots: (0 slots) slave
   replicates 30c40c7eb92bc3decdc9f8e0f7ac5c1d04865866
S: 3638186047852a4c1d3c82805be3a2b46f63c235 192.168.137.103:6384
   slots: (0 slots) slave
   replicates 39e4e1aa64ab168f0d875c0f187343382d7aadc0
M: 39e4e1aa64ab168f0d875c0f187343382d7aadc0 192.168.137.103:6381
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
S: 3049f1a9853529ca5cb2b0f9def43a1ae0b42064 192.168.137.103:6383
   slots: (0 slots) slave
   replicates 5de830891133b5621d06901d970ef84c026a6bd1
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
root@c81e4c88ef59:/data# redis-cli -c -a 1234 -h 192.168.137.103 -p 6382
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
192.168.137.103:6382> 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:3
cluster_stats_messages_ping_sent:1150
cluster_stats_messages_pong_sent:1149
cluster_stats_messages_meet_sent:1
cluster_stats_messages_sent:2300
cluster_stats_messages_ping_received:1149
cluster_stats_messages_pong_received:1151
cluster_stats_messages_received:2300
192.168.137.103:6382> cluster nodes
30c40c7eb92bc3decdc9f8e0f7ac5c1d04865866 192.168.137.103:6382@16382 myself,master - 0 1668000952000 3 connected 10923-16383
5de830891133b5621d06901d970ef84c026a6bd1 192.168.137.103:6380@16380 master - 0 1668000953660 1 connected 0-5460
59260c049597ea1b2b05d61eb6c1e0c70de57b45 192.168.137.103:6385@16385 slave 30c40c7eb92bc3decdc9f8e0f7ac5c1d04865866 0 1668000953559 3 connected
3638186047852a4c1d3c82805be3a2b46f63c235 192.168.137.103:6384@16384 slave 39e4e1aa64ab168f0d875c0f187343382d7aadc0 0 1668000954662 2 connected
39e4e1aa64ab168f0d875c0f187343382d7aadc0 192.168.137.103:6381@16381 master - 0 1668000954000 2 connected 5461-10922
3049f1a9853529ca5cb2b0f9def43a1ae0b42064 192.168.137.103:6383@16383 slave 5de830891133b5621d06901d970ef84c026a6bd1 0 1668000954000 1 connected
192.168.137.103:6382> 
root@c81e4c88ef59:/data#

6.测试

6.1 进入6382节点,并使用set/get读写数据

root@c81e4c88ef59:/data# redis-cli -c -a 1234 -h 192.168.137.103 -p 6382
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
192.168.137.103:6382> set name helloWord
-> Redirected to slot [5798] located at 192.168.137.103:6381
OK
192.168.137.103:6381> set test 123456
OK
192.168.137.103:6381> get test
"123456"
192.168.137.103:6381> get name
"helloWord"

6.2 然后再进入6385节点,读取刚才写入的数据

root@c81e4c88ef59:/data# redis-cli -c -a 1234 -h 192.168.137.103 -p 6385
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
192.168.137.103:6385> get test
-> Redirected to slot [6918] located at 192.168.137.103:6381
"123456"
192.168.137.103:6381> get name
"helloWord"
192.168.137.103:6381> 

读到数据,证明Redis Cluster集群创建成功文章来源地址https://www.toymoban.com/news/detail-433286.html

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