# Prometheus 监控 Redis

## prometheus 监控 redis 需要用到 redis\_exporter。

### 安装

```bash
cd /usr/local/src
wget https://github.com/oliver006/redis_exporter/releases/download/v0.21.2/redis_exporter-v0.21.2.linux-amd64.tar.gz
mkdir /usr/local/redis_exporter
tar xf redis_exporter-v0.21.2.linux-amd64.tar.gz -C /usr/local/redis_exporter/



# redis_exporter -h
-redis.addr：指明一个或多个 Redis 节点的地址，多个节点使用逗号分隔，默认为 redis://localhost:6379
-redis.password：验证 Redis 时使用的密码；
-redis.file：包含一个或多个redis 节点的文件路径，每行一个节点，此选项与 -redis.addr 互斥。
-web.listen-address：监听的地址和端口，默认为 0.0.0.0:9121
```

### 运行

```bash
## 无密码
./redis_exporter redis//192.168.111.11:6379 &

## 有密码
redis_exporter  -redis.addr 192.168.111.11:6379  -redis.password 123456
```

### 系统管理

```bash
$ vim /usr/lib/systemd/system/redis_exporter.service
[Unit]
Description=redis_exporter
Documentation=https://github.com/oliver006/redis_exporter
After=network.target

[Service]
Type=simple
# User=prometheus
ExecStart=/usr/local/redis_exporter/redis_exporter -redis.addr 192.168.111.11:6379  -redis.password 123456
Restart=on-failure
[Install]
WantedBy=multi-user.target
```

\`\`bash

## 启动用户，不指定 User 不用创建

groupadd prometheus useradd -g prometheus -m -d /var/lib/prometheus -s /sbin/nologin prometheus

````
```bash
systemctl daemon-reload
systemctl start redis_exporter
systemctl status redis_exporter
ss -tnl|grep 9121
````

### 配置 Grafana 的模板

* redis\_exporter 在 Grafana 上为我们提供好了 Dashboard 模板：<https://grafana.com/dashboards/763>

### docker 方式

* 如果是 Docker 部署的 Redis 集群节点，只要能连接到一个集群的一个节点，自然就能查询其他节点的指标了

> docker run -d --name redis\_exporter -p 9121:9121 oliver006/redis\_exporter --redis.addr redis\://192.168.111.11:6379 --redis.password '123456'

### 监控单节点

```yaml
  - job_name: "redis-sit"
    static_configs:
    - targets: ['192.168.111.11:9121']
```

### 监控集群

```yaml
  - job_name: 'redis_exporter_targets'
    static_configs:
      - targets:
        - redis://192.168.111.11:7000
        - redis://192.168.111.11:7001
        - redis://192.168.111.12:7002
        - redis://192.168.111.12:7003
        - redis://192.168.111.13:7004
        - redis://192.168.111.13:7005
    metrics_path: /scrape
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 192.168.111.11:9121
```


---

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