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