Docker 部署 redis 高可用(哨兵模式)
目录
一、简介
二、环境准备
三、部署步骤
四、redis可视化界面安装
五、测试
一、简介
哨兵模式是一种特殊的模式，首先Redis提供了哨兵的命令，哨兵是一个独立的进程，作为进程，它会独立运行。其原理是哨兵通过发送命令，等待Redis服务器响应，从而监控运行的多个Redis实例。
本文介绍基于docker和redis-sentinel的高可用redis集群搭建，大多数情况下，redis-sentinel也需要做高可用，这里先对redis搭建一主二从环境，另外需要3个redis-sentinel监控redis master。
官方推荐：一个健康的集群部署，至少需要3个Sentinel实例。
二、环境准备
| 节点IP | 节点名称 | 系统 | 安装Docker及版本 | 端口开放 |
| 192.168.51.187 | node187 | CentOS 7 | Docker Engine - Community 19.03.14 | 7001, 27001 |
| 192.168.51.226 | node226 | CentOS 7 | Docker Engine - Community 19.03.14 | 7002, 27002 |
| 192.168.51.236 | node236 | CentOS 7 | Docker Engine - Community 19.03.14 | 7003, 27003 |
说明:在四个节点上分别安装Docker, 具体安装步骤可参考: https://blog.csdn.net/DZP_dream/article/details/104670943
三、部署步骤
1.拉取镜像,创建文件夹(分别在三个节点执行)
拉取镜像
docker pull redis
创建文件夹
mkdir redis2.配置文件
节点一:
redis7001.conf 资源地址: https://download.csdn.net/download/DZP_dream/13764030?spm=1001.2014.3001.5503
sentinel27001.conf 资源地址: https://download.csdn.net/download/DZP_dream/13764042?spm=1001.2014.3001.5503
节点二:
redis7002.conf 资源地址: https://download.csdn.net/download/DZP_dream/13764033?spm=1001.2014.3001.5503
sentinel27002.conf https://download.csdn.net/download/DZP_dream/13764049?spm=1001.2014.3001.5503
节点三:
redis7003.conf 资源地址: https://download.csdn.net/download/DZP_dream/13764039?spm=1001.2014.3001.5503
sentinel27003.conf 资源地址: https://download.csdn.net/download/DZP_dream/13764054?spm=1001.2014.3001.5503
配置文件修改以下内容
3.redis安装(在三个节点分别执行)
#redis安装
#节点一执行
[root@node187 redis]# sudo docker run -d --restart=always \
-p 7001:7001 \
-v /home/redis/redis1/redis7001.conf:/usr/local/etc/redis/redis.conf \
-v /home/redis/redis1/data:/data \
--name=redis1 redis:latest redis-server /usr/local/etc/redis/redis.conf
#节点二执行
[root@node226 redis]# sudo docker run -d --restart=always \
-p 7002:7002 \
-v /home/redis/redis2/redis7002.conf:/usr/local/etc/redis/redis.conf \
-v /home/redis/redis2/data:/data \
--name=redis2 redis:latest redis-server /usr/local/etc/redis/redis.conf
#节点三执行
[root@node236 redis]# sudo docker run -d --restart=always -p 7003:7003 \
-v /home/redis/redis3/redis7003.conf:/usr/local/etc/redis/redis.conf \
-v /home/redis/redis3/data:/data \
--name=redis3 redis:latest redis-server /usr/local/etc/redis/redis.conf 4.哨兵安装(在三个节点分别执行)
#哨兵
#在节点一执行
[root@node187 redis]# sudo docker run -d --restart=always \
-p 27001:27001 \
-v /home/redis/redis27001/sentinel27001.conf:/usr/local/etc/redis/sentinel.conf \
-v /home/redis/redis27001/data:/data \
--name=redis27001 redis:latest redis-sentinel /usr/local/etc/redis/sentinel.conf
#在节点二执行
[root@node226 redis]# sudo docker run -d --restart=always \
-p 27002:27002 \
-v /home/redis/redis27002/sentinel27002.conf:/usr/local/etc/redis/sentinel.conf \
-v /home/redis/redis27002/data:/data \
--name=redis27002 redis:latest redis-sentinel /usr/local/etc/redis/sentinel.conf
#在节点三执行
[root@node236 redis]# sudo docker run -d --restart=always \
-p 27003:27003 \
-v /home/redis/redis27003/sentinel27003.conf:/usr/local/etc/redis/sentinel.conf \
-v /home/redis/redis27003/data:/data \
--name=redis27003 redis:latest redis-sentinel /usr/local/etc/redis/sentinel.conf 5.查看安装情况
#节点一
[root@node187 redis]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2a70a484a8f7 redis:latest "docker-entrypoint.s…" 29 seconds ago Up 23 seconds 6379/tcp, 0.0.0.0:27001->27001/tcp redis27001
abfb008b2c61 redis:latest "docker-entrypoint.s…" 5 minutes ago Up 5 minutes 6379/tcp, 0.0.0.0:7001->7001/tcp redis1
#节点二
[root@node226 redis]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
07201fab4202 redis:latest "docker-entrypoint.s…" 21 seconds ago Up 20 seconds 6379/tcp, 0.0.0.0:27002->27002/tcp redis27002
ad247183f7ce redis:latest "docker-entrypoint.s…" 3 minutes ago Up 3 minutes 6379/tcp, 0.0.0.0:7002->7002/tcp redis2
#节点三
[root@node236 redis]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
23aaca699769 redis:latest "docker-entrypoint.s…" 15 seconds ago Up 13 seconds 6379/tcp, 0.0.0.0:27003->27003/tcp redis27003
0f863fc72756 redis:latest "docker-entrypoint.s…" 3 minutes ago Up 3 minutes 6379/tcp, 0.0.0.0:7003->7003/tcp redis36.查看redis状态
[root@node187 redis1]# docker exec -it redis1 bash
#主容器查询集群状态
root@e0fcaafbb45a:/data# redis-cli -a aAzhjy@123 -p 7001
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:7001> info Replication
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.51.226,port=7002,state=online,offset=670505,lag=1
slave1:ip=192.168.51.236,port=7003,state=online,offset=670791,lag=1
master_replid:705a47c71c1c661af4e08b1861b800652ec932e8
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:670791
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:6707917.查看哨兵监控情况
[root@node187 redis1]# docker exec -it redis27001 bash
root@30d656aaceab:/data# redis-cli -p 27001
#查看集群主库情况
127.0.0.1:27001> sentinel master mymaster
1) "name"
2) "mymaster"
3) "ip"
4) "192.168.51.187"
5) "port"
6) "7001"
31) "num-slaves"
32) "2"
33) "num-other-sentinels"
34) "2"
#查看集群从库情况
127.0.0.1:27001> sentinel slaves mymaster
1) 1) "name"
2) "192.168.51.226:7002"
3) "ip"
4) "192.168.51.226"
5) "port"
6) "7002"
2) 1) "name"
2) "192.168.51.236:7003"
3) "ip"
4) "192.168.51.236"
5) "port"
6) "7003"8.项目中配置访问
9.通过客户端访问查看
四、redis可视化界面安装
1.创建数据库redis-manager
在节点二中的mysql数据库中创建名为redis-manager的数据库,用来存储redis集群信息
2.redis-manager安装
sudo docker run -d --name redis-manager \
-p 8048:8182 \
-e DATASOURCE_URL='jdbc:mysql://192.168.51.226:3306/redis-manager?characterEncoding=UTF-8&useUnicode=true&serverTimezone=Asia/Shanghai' \
-e DATASOURCE_USERNAME='root' \
-e DATASOURCE_PASSWORD='aAzhjy@123' \
reasonduan/redis-manager3.查看集群情况
地址: http://192.168.51.226:8048
账号密码: admin/admin
五、测试
1.停止一台redis服务