--- title: "CentOS7 安装 Redis 集群" date: 2019-11-29T15:14:29+08:00 lastmod: 2023-03-01T20:03:00+08:00 tags: ["redis"] categories: ["database"] --- ## 环境 - 操作系统: CentOS7.9，关闭 firewalld 和 selinux - Redis: 5.0.14 - master 实例 - 10.0.4.110:6371 - 10.0.4.110:6372 - 10.0.4.110:6373 - slave 实例 - 10.0.4.111:6371 - 10.0.4.111:6372 - 10.0.4.111:6373 ## 编译 redis server - 在 CentOS7.9 测试服务器上下载、编译 ```bash curl -LO http://download.redis.io/releases/redis-5.0.14.tar.gz tar zxf redis-5.0.14.tar.gz cd redis-5.0.14 make ``` - 抽取安装文件 ```bash mkdir -p /opt/redis/{bin,conf} cp src/{redis-server,redis-cli,redis-benchmark} /opt/redis/bin/ cd /opt/redis/bin ln -s redis-server redis-check-aof ln -s redis-server redis-check-rdb ln -s redis-server redis-sentinel ``` - 创建 /opt/redis/conf/redis-6379.conf，常用配置如下 ``` bind 0.0.0.0 protected-mode no port 6379 daemonize yes supervised no pidfile log/redis-6379.pid loglevel notice logfile log/redis-6379.log always-show-logo no #save "" save 900 1 save 300 10 save 60 10000 dbfilename dump.rdb dir db-6379 maxclients 8192 maxmemory 6442450944 #requirepass xxxx #masterauth xxxx #cluster-enabled yes #cluster-config-file nodes-6379.conf maxmemory-policy volatile-random appendonly no ``` - 创建 /opt/redis/conf/redis-637{1..3}.conf ```bash cd /opt/redis/conf cp redis-6379.conf redis-6371.conf cp redis-6379.conf redis-6372.conf cp redis-6379.conf redis-6373.conf sed -i \ -e 's/6379/6371/g' \ -e '/daemonize/cdaemonize no' \ -e '/supervised/csupervised systemd' \ -e '/requirepass/crequirepass 123456' \ -e '/masterauth/cmasterauth 123456' \ -e '/cluster/s/^#//' \ redis-6371.conf sed -i \ -e 's/6379/6372/g' \ -e '/daemonize/cdaemonize no' \ -e '/supervised/csupervised systemd' \ -e '/requirepass/crequirepass 123456' \ -e '/masterauth/cmasterauth 123456' \ -e '/cluster/s/^#//' \ redis-6372.conf sed -i \ -e 's/6379/6373/g' \ -e '/daemonize/cdaemonize no' \ -e '/supervised/csupervised systemd' \ -e '/requirepass/crequirepass 123456' \ -e '/masterauth/cmasterauth 123456' \ -e '/cluster/s/^#//' \ redis-6373.conf ``` - 创建日志目录和数据目录 ```bash cd /opt/redis mkdir -p db-{6371..6373} log ``` - 创建 /opt/redis/redis@.service，内容如下 ```ini [Unit] Description=Redis cluster -- node %i After=network.target [Service] WorkingDirectory=/opt/redis ExecStart=/opt/redis/bin/redis-server conf/redis-%i.conf Restart=on-failure RestartSec=2 [Install] WantedBy=multi-user.target ``` ## 部署 - 把 /opt/redis 目录复制到 10.0.4.110 和 10.0.4.111 上 ```bash scp -r /opt/redis 10.0.4.110:/opt/ scp -r /opt/redis 10.0.4.111:/opt/ ``` - 在 10.0.4.110 和 10.0.4.111 上都执行以下操作 ```bash cp /opt/redis/redis@.service /usr/lib/systemd/system/ systemctl daemon-reload ``` - 在 10.0.4.110 和 10.0.4.111 上配置实例开机启动 ```bash systemctl enable redis@6371 systemctl enable redis@6372 systemctl enable redis@6373 ``` - 在 10.0.4.110 和 10.0.4.111 上启动全部实例 ```bash systemctl start redis@6371 systemctl start redis@6372 systemctl start redis@6373 ``` ## 配置集群 - 在 10.0.4.110 上创建集群，指定三个 master 实例 ```bash /opt/redis/bin/redis-cli -a 123456 --no-auth-warning \ --cluster create 10.0.4.110:6371 10.0.4.110:6372 10.0.4.110:6373 ``` - 输出如下图 ![](https://www.colben.cn/img/dc44a6e8688218edb10ad7f2427b0525132.png) - 同意配置，输入 "yes"，回车后输出如下图 ![](https://www.colben.cn/img/eb3c0ccd3d0017c18d4eba3a0b776d29e21.png) - 查看集群当前实例 ```bash /opt/redis/bin/redis-cli -a 123456 --no-auth-warning -p 6371 cluster nodes # 这里保存好各个 master 节点的 id，下面增加 slave 节点时会用到 ``` - 输出如下图 ![](https://www.colben.cn/img/0bfe3ac4984fbd6973738dddb20d5bb6c72.png) - 添加 slave 实例 10.0.4.111:6371，同步 master 10.0.4.110:6371 ```bash /opt/redis/bin/redis-cli -a 123456 --no-auth-warning \ --cluster add-node 10.0.4.111:6371 10.0.4.110:6371 \ --cluster-slave \ --cluster-master-id 5be0edaf74d1eec50bbe675f9698397023a943b7 # 上述命令中，10.0.4.111:6371 是待添加实例，10.0.4.110:6371 是已存在集群中的任一实例 # --cluster-slave 指定添加 slave 实例 # --cluster-master-id 指定 10.0.4.110:6371 的 id，即本次添加实例的 master ``` - 输出如下图 ![](https://www.colben.cn/img/cf50fb5da24afb930eab80100707b13efbe.png) - 添加 slave 实例 10.0.4.111:6372，同步 master 10.0.4.110:6372 ```bash /opt/redis/bin/redis-cli -a 123456 --no-auth-warning \ --cluster add-node 10.0.4.111:6372 10.0.4.110:6371 \ --cluster-slave \ --cluster-master-id 96f2225fdd054d8a16b31726fd1eb0b66c612646 ``` - 输出如下图 ![](https://www.colben.cn/img/4577cd8a2c7aea037e50fb002f91bb40842.png) - 添加 slave 实例 10.0.4.111:6373，同步 master 10.0.4.110:6373 ```bash /opt/redis/bin/redis-cli -a 123456 --no-auth-warning \ --cluster add-node 10.0.4.111:6373 10.0.4.110:6371 \ --cluster-slave \ --cluster-master-id cd60c238e66c8b4a31355bee4610444a47acef86 ``` - 输出如下图 ![](https://www.colben.cn/img/633adea823cad6380030826ce75a44109fb.png) - 查看集群当前实例 ```bash /opt/redis/bin/redis-cli -a 123456 --no-auth-warning -p 6371 cluster nodes ``` - 输出如下图 ![](https://www.colben.cn/img/3d5e7c0b8e7a7e51028d11358f442947367.png) ## Docker 部署 - 安装 docker-ce，参考[这里](https://www.colben.cn/post/docker/#%E5%AE%89%E8%A3%85) - 安装 docker-compose，参考[这里](https://www.colben.cn/post/docker/#Compose) - 选择一个较大分区，创建 redis 集群数据目录和日志目录 ```bsah mkdir -p redis_cluster/{db,log}/{6371..6376} ``` - 在同级目录下创建 docker-compose.yml 文件，内容如下 ```yml version: "3.7" services: redis-6371: image: harbor.colben.cn/general/alpine-redis container_name: redis-6371 restart: on-failure stop_grace_period: 1m privileged: true network_mode: "host" environment: _CENV_cluster-enabled: "yes" _CENV_port: 6371 _CENV_maxmemory: 256MB # master 和 slave 实例的密码必须一致，可都为空 _CENV_masterauth: Pass_1234 _CENV_requirepass: Pass_1234 # master 节点列表 MASTER_NODES: "127.0.0.1:6371 127.0.0.1:6372 127.0.0.1:6373" # slave 节点列表 # 可以为空，表示没有 slave 节点 # 不为空时，数量必须与 master 节点数量一致，按顺序依次为 master 节点的从节点 SLAVE_NODES: "127.0.0.1:6374 127.0.0.1:6375 127.0.0.1:6376" volumes: - type: bind source: ./redis_cluster/db/6371 target: /var/lib/redis - type: bind source: ./redis_cluster/log/6371 target: /var/log/redis redis-6372: image: harbor.colben.cn/general/alpine-redis container_name: redis-6372 restart: on-failure stop_grace_period: 1m privileged: true network_mode: "host" environment: _CENV_cluster-enabled: "yes" _CENV_port: 6372 _CENV_maxmemory: 256MB _CENV_masterauth: Pass_1234 _CENV_requirepass: Pass_1234 volumes: - type: bind source: ./redis_cluster/db/6372 target: /var/lib/redis - type: bind source: ./redis_cluster/log/6372 target: /var/log/redis redis-6373: image: harbor.colben.cn/general/alpine-redis container_name: redis-6373 restart: on-failure stop_grace_period: 1m privileged: true network_mode: "host" environment: _CENV_cluster-enabled: "yes" _CENV_port: 6373 _CENV_maxmemory: 256MB _CENV_masterauth: Pass_1234 _CENV_requirepass: Pass_1234 volumes: - type: bind source: ./redis_cluster/db/6373 target: /var/lib/redis - type: bind source: ./redis_cluster/log/6373 target: /var/log/redis redis-6374: image: harbor.colben.cn/general/alpine-redis container_name: redis-6374 restart: on-failure stop_grace_period: 1m privileged: true network_mode: "host" environment: _CENV_cluster-enabled: "yes" _CENV_port: 6374 _CENV_maxmemory: 256MB _CENV_masterauth: Pass_1234 _CENV_requirepass: Pass_1234 volumes: - type: bind source: ./redis_cluster/db/6374 target: /var/lib/redis - type: bind source: ./redis_cluster/log/6374 target: /var/log/redis redis-6375: image: harbor.colben.cn/general/alpine-redis container_name: redis-6375 restart: on-failure stop_grace_period: 1m privileged: true network_mode: "host" environment: _CENV_cluster-enabled: "yes" _CENV_port: 6375 _CENV_maxmemory: 256MB _CENV_masterauth: Pass_1234 _CENV_requirepass: Pass_1234 volumes: - type: bind source: ./redis_cluster/db/6375 target: /var/lib/redis - type: bind source: ./redis_cluster/log/6375 target: /var/log/redis redis-6376: image: harbor.colben.cn/general/alpine-redis container_name: redis-6376 restart: on-failure stop_grace_period: 1m privileged: true network_mode: "host" environment: _CENV_cluster-enabled: "yes" _CENV_port: 6376 _CENV_maxmemory: 256MB _CENV_masterauth: Pass_1234 _CENV_requirepass: Pass_1234 volumes: - type: bind source: ./redis_cluster/db/6376 target: /var/lib/redis - type: bind source: ./redis_cluster/log/6376 target: /var/log/redis ``` - 启动 redis 集群 ```bash docker-compose up -d ``` ## 参考 - [redis 官网](https://redis.io/topics/cluster-tutorial)