1.准备工作 安装go、glibe(需要连google服务器，咋连的，我就不写了，因为尝试了各种办法，都失败了，很伤心)

2.下载hadoop_exporter

cd /usr/local/prom/exporter 
git clone https://github.com/Datatamer/hadoop_exporter
cd hadoop_exporter
glide install
go get github.com/prometheus/client_golang/prometheus
go get github.com/prometheus/log
go build */*.go

3.为几个exporter创建systemd服务

#vim /etc/systemd/system/namenode_exporter.service
[Unit]
Description=namenode_exporter
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/prom/exporter/hadoop_exporter/namenode_exporter -namenode.jmx.url http://lab1:50070/jmx
Restart=on-failure
[Install]
WantedBy=multi-user.target

#vim /etc/systemd/system/datanode_exporter.service
[Unit]
Description=datanode_exporter
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/prom/exporter/hadoop_exporter/datanode_exporter -datanode.jmx.url http://lab1:50075/jmx
Restart=on-failure
[Install]
WantedBy=multi-user.target

#vim /etc/systemd/system/journalnode_exporter.service
[Unit]
Description=journalnode_exporter
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/prom/exporter/hadoop_exporter/journalnode_exporter -journalnode.jmx.url http://lab1:8480/jmx
Restart=on-failure
[Install]
WantedBy=multi-user.target

#vim /etc/systemd/system/resourcemanager_exporter.service
[Unit]
Description=resourcemanager_exporter
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/prom/exporter/hadoop_exporter/resourcemanager_exporter -resourcemanager.url http://lab1:8080
Restart=on-failure
[Install]
WantedBy=multi-user.target

4.为几个exporter配置prometheus配置文件

##hadoop##
  - job_name: 'nn'
    static_configs:
    - targets: ['localhost:9070']
      labels:
          instance: lab1

  - job_name: 'rm'
    static_configs:
    - targets: ['localhost:9088']
      labels:
          instance: lab1

  - job_name: 'dn'
    static_configs:
    - targets: ['localhost:9072']
      labels:
          instance: lab1

  - job_name: 'jn'
    static_configs:
    - targets: ['localhost:9071']
      labels:
          instance: lab1

5.启动hadoop exporter

systemctl start namenode_exporter
systemctl start journalnode_exporter
systemctl start datanode_exporter
systemctl start resourcemanager_exporter

systemctl status namenode_exporter
systemctl status journalnode_exporter
systemctl status datanode_exporter
systemctl status resourcemanager_exporter

systemctl enable namenode_exporter
systemctl enable journalnode_exporter
systemctl enable datanode_exporter
systemctl enable resourcemanager_exporter

6.