Grafana dashboard: PG Overview
Description: This dashboard works with postgres_exporter for prometheus

# PostgreSQL_exporter

## 1.下载和配置

​	下载文件：postgres_exporter-0.10.0.linux-amd64.tar.gz
​	解压：

```shell
tar -C /opt -xvf postgres_exporter-0.10.0.linux-amd64.tar.gz
cd /opt && mv postgres_exporter-0.10.0.linux-amd64 postgres_exporter
cd postgres_exporter
```
添加脚本: start.sh

```shell
sudo -u postgres DATA_SOURCE_NAME="user=postgres host=/var/run/postgresql/ sslmode=disable" postgres_exporter #需要通过用户postgres启动
```

添加至systemd：


```shell
vim /usr/lib/systemd/system/postgres_exporter.service
[Unit]
Description=postgres_exporter
After=network.target
[Service]
Type=simple
ExecStart=/PATH/TO/start.sh 
Restart=on-failure
[Install]
WantedBy=multi-user.target
```

​	启动：

```shell
systemctl daemon-reload
systemctl start postgres_exporter
systemctl status postgres_exporter
systemctl enable postgres_exporte
```
## 2.接入prometheus
edit `prometheus.yml`
```yaml
  - job_name: "postgresql"
    file_sd_configs:
      - files:
          - targets/postgresql.yml
        refresh_interval: 10m
```
`targets/postgresql.yml`
```yaml
      - targets: ["10.1xx.1.1xx:9187"]
        labels:
          instance: 10.1xx.1.1xx_postgresql
          targets: "10.1xx.1.1xx:9187"
```

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