使用Docker-Compose搭建Redis集群
1. 集群配置
3主+3从
由于仅用于测试，故我这里只用1台服务器进行模拟
redis列表
2.编写redis.conf
在server上创建一个目录用于存放redis集群部署文件。这里我放的路径为/root/redis-cluster
在/opt/docker/redis-cluster目录下创建redis-1,redis-2,redis-3,redis-4,redis-5,redis-6文件夹
mkdir -p /opt/docker/redis-cluster/{redis-1,redis-2,redis-3,redis-4,redis-5,redis-6}#创建持久化目录
mkdir -p /opt/docker/redis-cluster/redis-1/data
mkdir -p /opt/docker/redis-cluster/redis-2/data
mkdir -p /opt/docker/redis-cluster/redis-3/data
mkdir -p /opt/docker/redis-cluster/redis-4/data
mkdir -p /opt/docker/redis-cluster/redis-5/data
mkdir -p /opt/docker/redis-cluster/redis-6/data3. 在每个redis-*文件夹下创建redis.conf文件，并写入如下内容:
cluster-enabled yes # 开启集群
cluster-config-file nodes.conf # 集群配置文件
cluster-node-timeout 5000 # 集群节点多少时间未响应视为该节点丢失
appendonly yes
port 6379 # redis监听端口
masterauth passwd123 #设置master节点密码
requirepass passwd123 #设置密码注意：port值不能都为6379，根据上面redis列表设置的端口号，依次给redis-1 ~ redis-6设置6379~6384端口号
4.编写docker-compose.yml文件
这里直接使用daocloud提供的redis镜像地址daocloud.io/library/redis:6.0.4
在/root/redis-cluster文件夹下创建docker-compose.yml文件。
docker-compose.yml文件内容如下：
version: '3.1'
services:# redis1配置redis1:image: daocloud.io/library/redis:6.0.4container_name: redis-1restart: alwaysnetwork_mode: "host"volumes:- /opt/docker/redis-cluster/redis-1/data:/data- /opt/docker/redis-cluster/redis-1/redis.conf:/usr/local/etc/redis/redis.confcommand: ["redis-server", "/usr/local/etc/redis/redis.conf"]# redis2配置redis2:image: daocloud.io/library/redis:6.0.4container_name: redis-2restart: alwaysnetwork_mode: "host"volumes:- /opt/docker/redis-cluster/redis-2/data:/data- /opt/docker/redis-cluster/redis-2/redis.conf:/usr/local/etc/redis/redis.confcommand: ["redis-server", "/usr/local/etc/redis/redis.conf"]# redis3配置redis3:image: daocloud.io/library/redis:6.0.4container_name: redis-3restart: alwaysnetwork_mode: "host"volumes:- /opt/docker/redis-cluster/redis-3/data:/data- /opt/docker/redis-cluster/redis-3/redis.conf:/usr/local/etc/redis/redis.confcommand: ["redis-server", "/usr/local/etc/redis/redis.conf"]# redis4配置redis4:image: daocloud.io/library/redis:6.0.4container_name: redis-4restart: alwaysnetwork_mode: "host"volumes:- /opt/docker/redis-cluster/redis-4/data:/data- /opt/docker/redis-cluster/redis-4/redis.conf:/usr/local/etc/redis/redis.confcommand: ["redis-server", "/usr/local/etc/redis/redis.conf"]# redis5配置redis5:image: daocloud.io/library/redis:6.0.4container_name: redis-5restart: alwaysnetwork_mode: "host"volumes:- /opt/docker/redis-cluster/redis-5/data:/data- /opt/docker/redis-cluster/redis-5/redis.conf:/usr/local/etc/redis/redis.confcommand: ["redis-server", "/usr/local/etc/redis/redis.conf"]# redis6配置redis6:image: daocloud.io/library/redis:6.0.4container_name: redis-6restart: alwaysnetwork_mode: "host"volumes:- /opt/docker/redis-cluster/redis-6/data:/data- /opt/docker/redis-cluster/redis-6/redis.conf:/usr/local/etc/redis/redis.confcommand: ["redis-server", "/usr/local/etc/redis/redis.conf"]启动容器,执行命令:
#启动容器
docker-compose -f xxx.yaml up -d
5.开启集群
随便找一个容器进入，这里我选择redis-1进入。 在进入容器后，输入如下命令开启集群:
redis-cli --cluster create 192.168.66.180:6379 \
192.168.66.180:6380 \
192.168.66.180:6381 \
192.168.66.180:6382 \
192.168.66.180:6383 \
192.168.66.180:6384 \
--cluster-replicas 1
出现下图即为成功。
6.测试
使用redis-cli命令，连接集群中任意节点。（随便找一台能ping通集群所在IP的电脑，这里我用的本机进行测试）
6.1 查看节点属性
redis-cli -c -h 192.168.66.180 -p 6379192.168.66.180:6379> cluster info显示为如下图，即为集群健康状态
6.2 查看节点信息
cluster nodes
注意看图中的slave,master,myself等关键字。
6.3 插入一个值
192.168.66.180:6379> set test 'hello world'
-> Redirected to slot [6918] located at 192.168.66.180:6380
OK
192.168.66.180:6380> 
注意：这里根据切片自动切换到了该数据分片所在的节点上，所以下面可以看到连接的节点变为了192.168.1.4:6380
get test
168.66.180:6379> set test 'hello world'
-> Redirected to slot [6918] located at 192.168.66.180:6380
OK
192.168.66.180:6380> get test
"hello world"
192.168.66.180:6380> 这里因为就是在该数据所在分片上进行的查询，所以连接节点没有改变。
7.添加密码：
7.1 编辑redis.conf文件
#为redis.conf文件添加如下配置。这里设置密码为123456
masterauth 123456
requirepass 1234567.2 编辑docker-compose.yml文件
#为docker-compose.yml中每个容器添加如下配置:
environment:- REDISCLI_AUTH=1234567.3 连接集群
redis-cli -c -h 192.168.66.180 -p 6379 -a 123456