安装prometheus

# 安装prometheus
[【附件】prometheus和grafana安装配置.zip](/media/attachment/2021/08/prometheus和grafana安装配置.zip)

## 下载
- 官网链接： [https://prometheus.io/download/](https://prometheus.io/download/ "https://prometheus.io/download/")
- 本文使用版本：`2.28.1/2021-07-01`
- 下载链接：[https://github.com/prometheus/prometheus/releases/download/v2.28.1/prometheus-2.28.1.linux-amd64.tar.gz](https://github.com/prometheus/prometheus/releases/download/v2.28.1/prometheus-2.28.1.linux-amd64.tar.gz "https://github.com/prometheus/prometheus/releases/download/v2.28.1/prometheus-2.28.1.linux-amd64.tar.gz")

```shell
tar xzf prometheus-2.28.1.linux-amd64.tar.gz
mv prometheus-2.28.1.linux-amd64 /usr/local/prometheus
mkdir /usr/local/prometheus/{data,rules,config,logs}
```

## prometheus主配置文件
```yaml
global:
  scrape_interval: 15s
  evaluation_interval: 15s
alerting:
  alertmanagers:
  - static_configs:
    - targets: 
      - 1.1.1.1:9093
    timeout: 10s
    api_version: v2
    path_prefix: /
    scheme: http
    basic_auth:
      username: ${username}
      password: ${password}
rule_files:
  - "/usr/local/prometheus/rules/cpu_over.yml"
  - "/usr/local/prometheus/rules/disk_over.yml"
  - "/usr/local/prometheus/rules/memory_over.yml"
  - "/usr/local/prometheus/rules/node_down.yml"
scrape_configs:
  - job_name: 'prometheus-server'
    scheme: 'http'
    static_configs:
    - targets: ['localhost:9090']
    metrics_path: /metrics
    basic_auth:
      username: ${username}
      password: ${password}
  
  - job_name: 'consul-sd'
    consul_sd_configs:
      - server: '127.0.0.1:8500'
        services: []
    
    relabel_configs:
      - source_labels: [__meta_consul_service_port]
        regex: 8300
        action: drop
      - regex: __meta_consul_service_metadata_(.+)
        action: labelmap
```

## prometheus web配置文件
- 需要：httpd-tools
- 加密命令：`htpasswd -nBC 10 "" | tr -d ':\n'`
运行命令后将输出的密码加入到web-config.yml文件的用户名后。
```
basic_auth_users:
  ${username}: ${password}
  zhangky: ${password}
```

## 启动服务器
```
/usr/local/prometheus/prometheus --config.file="/usr/local/prometheus/prometheus.yml" \
--web.listen-address="0.0.0.0:9090" \
--web.config.file="/usr/local/prometheus/config/web-config.yml" \
--storage.tsdb.path="/usr/local/prometheus/config/data" > /usr/local/prometheus/logs/prometheus.log 2>&1 &
```

## systemd启动脚本
```
[root@osa-monitor node_exporter]# cat /usr/lib/systemd/system/prometheus.service
[Unit]
Description=prometheus
After=syslog.target network.target
ConditionFileIsExecutable=/usr/local/prometheus/prometheus

[Service]
StartLimitInterval=5
StartLimitBurst=10
ExecStart=/usr/local/prometheus/prometheus --config.file=/usr/local/prometheus/config/prometheus.yml --web.listen-address=0.0.0.0:9090  --web.config.file=/usr/local/prometheusconfig//web-config.yml --storage.tsdb.path=/usr/local/prometheus/data --storage.tsdb.retention=180d
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=always
RestartSec=30

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