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+---
+title: "Redis Sentinel"
+date: 2019-10-30T11:37:36+08:00
+lastmod: 2019-10-30T11:37:36+08:00
+tags: ["redis", "sentinel", "哨兵"]
+categories: ["database"]
+---
+
+# 环境
+主机名 | 地址 | 操作系统 | 初始状态
+---- | ---- | ---- | ----
+sentinel86 | 10.1.14.86 | CentOS7.4 | null
+redis87 | 10.1.14.87 | CentOS7.4 | master
+redis88 | 10.1.14.88 | CentOS7.4 | slave
+redis89 | 10.1.14.89 | CentOS7.4 | slave
+
+# 安装 redis
+- 在全部服务器上安装 redis
+    ```bash
+    yum install epel-release
+    yum install redis
+    ```
+
+# redis master 配置
+- 在 redis87 上修改 /etc/redis.conf
+    ```
+    bind 0.0.0.0
+    ```
+
+# redis slave 配置
+- 在 redis88 和 redis89 上修改 /etc/redis.conf
+    ```
+    bind 0.0.0.0
+    slaveof 10.1.14.87 6379
+    ```
+
+# redis sentinel 配置
+- 在 sentinel86 上创建三个 sentinel 配置文件
+    ```bash
+    cd /etc/
+    cp redis-sentinel.conf redis-sentinel-16379.conf
+    cp redis-sentinel.conf redis-sentinel-26379.conf
+    mv redis-sentinel.conf redis-sentinel-36379.conf
+    chown redis.root redis-sentinel-?6379.conf
+    ```
+- 修改 /etc/redis-sentinel-16379.conf
+    ```
+    bind 0.0.0.0
+    port 16379
+    dir /var/log/redis/16379
+    sentinel monitor mymaster 10.1.14.87 6379 2
+    sentinel down-after-milliseconds mymaster 8000
+    logfile /var/log/redis/16379/sentinel.log
+    ```
+- 修改 /etc/redis-sentinel-26379.conf
+    ```
+    bind 0.0.0.0
+    port 26379
+    dir /var/log/redis/26379
+    sentinel monitor mymaster 10.1.14.87 6379 2
+    sentinel down-after-milliseconds mymaster 8000
+    logfile /var/log/redis/26379/sentinel.log
+    ```
+- 修改 /etc/redis-sentinel-36379.conf
+    ```
+    bind 0.0.0.0
+    port 36379
+    dir /var/log/redis/36379
+    sentinel monitor mymaster 10.1.14.87 6379 2
+    sentinel down-after-milliseconds mymaster 8000
+    logfile /var/log/redis/36379/sentinel.log
+    ```
+- 创建日志目录
+    ```bash
+    cd /var/log/redis/
+    mkdir 16379 26379 36379
+    chown redis.redis ?6379 -R
+    ```
+- 创建两个 sentinel service 文件
+    ```bash
+    cd /usr/lib/systemd/system/
+    cp redis-sentinel.service redis-sentinel-16379.service
+    cp redis-sentinel.service redis-sentinel-26379.service
+    mv redis-sentinel.service redis-sentinel-36379.service
+    ```
+- 修改 /usr/lib/systemd/system/redis-sentinel-16379.service
+    ```
+    ExecStart=/usr/bin/redis-sentinel /etc/redis-sentinel-16379.conf --daemonize no
+    ExecStop=/usr/libexec/redis-shutdown redis-sentinel-16379
+    ```
+- 修改 /usr/lib/systemd/system/redis-sentinel-26379.service
+    ```
+    ExecStart=/usr/bin/redis-sentinel /etc/redis-sentinel-26379.conf --daemonize no
+    ExecStop=/usr/libexec/redis-shutdown redis-sentinel-26379
+    ```
+- 修改 /usr/lib/systemd/system/redis-sentinel-36379.service
+    ```
+    ExecStart=/usr/bin/redis-sentinel /etc/redis-sentinel-36379.conf --daemonize no
+    ExecStop=/usr/libexec/redis-shutdown redis-sentinel-36379
+    ```
+- 更新服务
+    ```bash
+    systemctl daemon-reload
+    ```
+
+# 启动 redis 服务
+- 在 redis87、redis88 和 redis89 上启动 redis 服务
+    ```bash
+    systemctl start redis
+    # 查看当前节点主从信息
+    redis-cli info replication
+    ```
+
+# 启动 redis sentinel 监控
+- 在 sentinel86 上启动 sentinel 监管程序
+    ```bash
+    systemctl start redis-sentinel-16379
+    systemctl start redis-sentinel-26379
+    systemctl start redis-sentinel-36379
+    ```
+