Prometheus（二）安装启动

• https://www.hi-linux.com/posts/25047.html

一、安装

1. 放在：/usr/local/prometheus/
2. Linux 安装 Prometheus

$ wget  https://github.com/prometheus/prometheus/releases/download/v1.6.3/prometheus-1.6.3.linux-amd64.tar.gz
$ tar xzvf prometheus-1.6.3.linux-amd64.tar.gz
$ mv prometheus-1.6.3.linux-amd64 /usr/local/prometheus

3. 查看

root@VM-0-9-ubuntu:/# cd /usr/local/prometheus/
root@VM-0-9-ubuntu:/usr/local/prometheus# ./prometheus --version
prometheus, version 1.6.3 (branch: master, revision: c580b60c67f2c5f6b638c3322161bcdf6d68d7fc)
  build user:       root@a6410e65f5c7
  build date:       20170522-09:15:06
  go version:       go1.8.1

4. 配置Prometheus
   在prometheus目录下有一个名为prometheus.yml的主配置文件。其中包含大多数标准配置及prometheus的自检控配置，默认配置文件如下：

$ vim /usr/local/prometheus/prometheus.yml

# 全局配置
global:
  scrape_interval:     15s # 默认抓取间隔, 15秒向目标抓取一次数据。
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

  # 这个标签是在本机上每一条时间序列上都会默认产生的，主要可以用于联合查询、远程存储、Alertmanger时使用。
  external_labels:
      monitor: 'codelab-monitor'

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first.rules"
  # - "second.rules"

# 这里就表示抓取对象的配置
# 这里是抓去promethues自身的配置
scrape_configs:
# job name 这个配置是表示在这个配置内的时间序例，每一条都会自动添加上这个{job_name:"prometheus"}的标签。
  - job_name: 'prometheus'

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.

    # 重写了全局抓取间隔时间，由15秒重写成5秒。
    scrape_interval: 5s

    static_configs:
      - targets: ['localhost:9090']

5. 创建用户
   单独创建一个专门用于运行prometheus的用户，不用root运行程序是一种好习惯。主目录为/var/lib/prometheus，用作prometheus的数据目录。

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

6. 创建Systemd服务

$ vim /etc/systemd/system/prometheus.service

[Unit]
Description=prometheus
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/prometheus/prometheus -config.file=/usr/local/prometheus/prometheus.yml -storage.local.path=/var/lib/prometheus
Restart=on-failure
[Install]
WantedBy=multi-user.target

7. 启动Prometheus
   $ systemctl start prometheus

8. 验证Prometheus是否启动成功

root@VM-0-9-ubuntu:/usr/local/prometheus# systemctl status prometheus
● prometheus.service - prometheus
   Loaded: loaded (/etc/systemd/system/prometheus.service; disabled; vendor preset: enabled)
   Active: active (running) since Wed 2019-07-17 14:06:09 CST; 14s ago
 Main PID: 5572 (prometheus)
    Tasks: 7
   Memory: 12.1M
      CPU: 135ms
   CGroup: /system.slice/prometheus.service
           └─5572 /usr/local/prometheus/prometheus -config.file=/usr/local/prometheus/prometheus.yml -storage.local.path=/var/lib/prometheus

Jul 17 14:06:09 VM-0-9-ubuntu systemd[1]: Started prometheus.
Jul 17 14:06:09 VM-0-9-ubuntu prometheus[5572]: time="2019-07-17T14:06:09+08:00" level=info msg="Starting prometheus (version=1.6.3, branch=master, revision=c

9. 访问自带Web

• Prometheus 自带一个比较简单的Web，可以查看表达式搜索结果、报警配置、prometheus配置，exporter状态等。自带Web默认在http://ip:9090。
• Prometheus 也自带exporter，我们通过请求 http://ip:9090/metrics 可以查看从exporter中能具体抓到哪些数据。