目标

为Prometheus安装Node程序。

步骤

node exporter程序

wget https://github.com/prometheus/node_exporter/releases/download/v1.4.0/node_exporter-1.4.0.linux-amd64.tar.gz
tar xvzf node_exporter-1.4.0.linux-amd64.tar.gz
cd node_exporter-1.4.0.linux-amd64/

sudo cp ./node_exporter /usr/local/bin/

node-exporter.service

sudo vim /etc/systemd/system/node-exporter.service

内容如下：

[Unit]
Description=Prometheus Node Exporter Service
After=network.target

[Service]
User=node_exporter
Group=node_exporter
Type=simple
ExecStart=/usr/local/bin/node_exporter

[Install]
WantedBy=multi-user.target

node_exporter用户

sudo useradd --system --no-create-home --shell /sbin/nologin --comment "prometheus node_exporter user" --user-group node_exporter

Sys V

sudo systemctl daemon-reload
sudo systemctl enable node-exporter
sudo systemctl start node-exporter
sudo systemctl status node-exporter

状态如下：
node-exporter状态

安全组放开9100端口

具体如下：
node开发9100端口

Prometheus服务器端

接下来回到《Prometheus系列（1）之EC2安装Server端》这篇文章中的Prometheus的服务器端的EC2机器上面。

更新/etc/prometheus/prometheus.yml配置

sudo vim /etc/prometheus/prometheus.yml

添加如下内容：

  - job_name: "node_exporter"
    static_configs:
      - targets: ["172.30.2.26:9100"]

整个文件内容如下：

# 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"]
  - job_name: "node_exporter"
    static_configs:
      - targets: ["172.30.2.26:9100"]