# 安装Prometheus

官网给出了很多种安装方法（`https://prometheus.io/docs/prometheus/latest/installation/`），最常用的就是二进制与docker镜像，这里我们使用已经编译好的二进制进行安装。

从官网（`https://prometheus.io/download/`）\
下载最新版本（`2.15.2`）的二进制包，解压，然后查看prometheus版本信息

```
$ wget https://github.com/prometheus/prometheus/releases/download/v2.15.2/prometheus-2.15.2.linux-amd64.tar.gz
$ tar xzvf prometheus-2.15.2.linux-amd64.tar.gz
$ cd prometheus-2.15.2.linux-amd64
$ ./prometheus --version
```

当使用二进制进行安装时，最好用systemd来管理。我们把整个`prometheus-2.15.2.linux-amd64`文件夹移动到`/usr/local/`目录下，并重命名为`prometheus`

```
$ mv ./prometheus-2.15.2.linux-amd64 /usr/local/prometheus
```

然后创建文件`/usr/lib/systemd/system/prometheus.service`，内容如下

```
[Unit]
Description=prometheus
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/prometheus/prometheus --config.file=/usr/local/prometheus/prometheus.yml --storage.tsdb.path=/var/lib/prometheus
Restart=on-failure

[Install]
WantedBy=multi-user.target
```

关于启动参数可以使用命令`/usr/local/prometheus/prometheus --help`查看。这里我们把数据的存储目录指定到`/var/lib/prometheus`

然后启动prometheus，并查看prometheus是否启动成功

```
$ systemctl daemon-reload && systemctl enable prometheus
$ systemctl start prometheus && systemctl status prometheus
```

如果启动失败，则可以通过`journalctl -xeu prometheus --no-pager`查看错误日志（因为systemd管理的service的stdout日志都由journald接管）。如果成功，此时我们可以通过`http://ip:9090`访问prometheus自带的UI

![](/files/-MA1FeDpcFZMquD6h-8A)


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