一、安装 prometheus

i 在 Prometheus + Grafana 的体系架构下，Prometheus 相当于一个注册中心。

1. 下载 prometheus

wget https://github.com/prometheus/prometheus/releases/download/v2.27.1/prometheus-2.27.1.linux-amd64.tar.gz
加速版：
wget https://mirror.liuyan.wang/download/prometheus/prometheus/prometheus-2.27.1.linux-amd64.tar.gz

2. 解压

tar xvfz prometheus-2.27.1.linux-amd64.tar.gz 
cd prometheus-2.27.1.linux-amd64

3. 配置文件瞜一眼

vim prometheus.yml

# my global config 
global: 
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute. 
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute. 
  # scrape_timeout is set to the global default (10s). 
 
# Alertmanager configuration 
alerting: 
  alertmanagers: 
  - static_configs: 
    - targets: 
      # - alertmanager:9093 
 
# Load rules once and periodically evaluate them according to the global 'evaluation_interval'. 
rule_files: 
  # - "first_rules.yml" 
  # - "second_rules.yml" 
 
# A scrape configuration containing exactly one endpoint to scrape: 
# Here it's Prometheus itself. 
scrape_configs: 
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config. 
  - job_name: 'prometheus' 
 
    # metrics_path defaults to '/metrics' 
    # scheme defaults to 'http'. 
 
    static_configs: 
    - targets: ['localhost:9090']

i 最后一行看到prometheus默认对外端口：9090

4. 启动

./prometheus --config.file=prometheus.yml

此时使用9090端口可以在浏览器访问

二、被监控节点安装 node_exporter

node_exporter装在节点上收集信息，提供给prometheus,granfna再从prometheus获取并展示

1. 下载 node_exporter

wget https://github.com/prometheus/node_exporter/releases/download/v1.1.2/node_exporter-1.1.2.linux-amd64.tar.gz
加速版：
wget https://mirror.liuyan.wang/download/prometheus/node_exporter/node_exporter-1.1.2.linux-amd64.tar.gz

2. 解压

wget https://github.com/prometheus/node_exporter/releases/download/v1.1.2/node_exporter-1.1.2.linux-amd64.tar.gz

cd node_exporter-1.1.2.linux-amd64

3. 启动

./node_exporter

默认端口9100
此时使用9100端口可以在浏览器访问

4. 修改 prometheus.yml

prometheus和节点端都已部署完毕，现将两者联系到一起
在 prometheus端的prometheus.yml中加入被监控节点信息

vim prometheus.yml

拉到最下面，添加一段：

###   被监控节点   ###
  - job_name: 'node1'
    static_configs: 
    - targets: ['IP:9100']

这里把IP换成被监控节点IP，修改完后完整配置：

# my global config 
global: 
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute. 
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute. 
  # scrape_timeout is set to the global default (10s). 
 
# Alertmanager configuration 
alerting: 
  alertmanagers: 
  - static_configs: 
    - targets: 
      # - alertmanager:9093 
 
# Load rules once and periodically evaluate them according to the global 'evaluation_interval'. 
rule_files: 
  # - "first_rules.yml" 
  # - "second_rules.yml" 
 
# A scrape configuration containing exactly one endpoint to scrape: 
# Here it's Prometheus itself. 
scrape_configs: 
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config. 
  - job_name: 'prometheus' 
 
    # metrics_path defaults to '/metrics' 
    # scheme defaults to 'http'. 
 
    static_configs: 
    - targets: ['localhost:9090'] 

###   被监控节点   ###
  - job_name: 'node1'
    static_configs: 
    - targets: ['IP:9100']

5. 重启prometheus

#停掉进程后：
./prometheus --config.file=prometheus.yml

至此节点已经把服务器信息提交给prometheus，接下来安装granfna并与prometheus对接

三、安装Grafna

1. 下载 Grafna

wget https://dl.grafana.com/oss/release/grafana-8.4.1.linux-amd64.tar.gz
加速版：
wget https://mirror.liuyan.wang/download/prometheus/granfna/grafana-8.4.1.linux-amd64.tar.gz

2. 解压

tar xvzf grafana-8.0.1.linux-amd64.tar.gz

3. 启动

./bin/grafana-server web

启动后通过IP:3000访问granfna监控平台

w 默认初始用户名密码：
admin
admin

登录后，可以重设密码，也可以不重设

来到主界面

四、配置 Grafna，使其对接prometheus的数据

1. 配置数据源（Data sources）

点击 Add data source

选择数据源为 Prometheus，点击 Select,选择类型

Setings标签:
填写 Name 和prometheus的 URL

填写完毕后，点击 Save & test

Dashboards标签：
Prometheus Stats、Prometheus 2.0 Stats、Grafana metrics，统统 import