安装Prometheus和Grafana

(一) 安装prometheus install

$ wget https://github.com/prometheus/prometheus/releases/download/v2.4.3/prometheus-2.4.3.linux-amd64.tar.gz

$ tar zxvf prometheus-2.4.3.linux-amd64.tar.gz

$ cd prometheus-2.4.3.linux-amd64

如果需要添加新的job，在这个文件添加

$ vim prometheus.yml   

global:
  scrape_interval:     15s
  evaluation_interval: 15s
  # scrape_timeout is set to the global default (10s).
alerting:
  alertmanagers:
  - static_configs:
    - targets:
      # - alertmanager:9093
rule_files:

scrape_configs:

  - job_name: 'prometheus'
    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.
    static_configs:
    - targets: ['localhost:9090']

  - job_name: 'linux1'
    static_configs:
      - targets: ['192.xxx.xx.xx:9100']
        labels:
          instance: server1
  - job_name: 'linux2'
    static_configs:
      - targets: ['192.xxx.xx.xx:9100']
        labels:
          instance: server2

运行 start Prometheus
$ nohup ./prometheus &  

改成systemd服务

$ cd ..
$ sudo mv prometheus-2.4.3.linux-amd64 /usr/local/prometheus

$ sudo groupadd prometheus
$ sudo useradd -g prometheus -m -d /usr/local/prometheus -s /sbin/nologin prometheus

$ sudo chown -R prometheus:prometheus /usr/local/prometheus

$ sudo vim /etc/systemd/system/prometheus.service  # 写入如下内容
[Unit]
Description=prometheus
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/prometheus/prometheus --config.file=/usr/local/prometheus/prometheus.yml --storage.tsdb.path=/usr/local/prometheus
Restart=on-failure
[Install]
WantedBy=multi-user.target

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Prometheus自带一个Web网站，默认端口为9090, http://ip:9090.可以查看表达式搜索结果、报警配置、prometheus配置,exporter状态等. 

(二) 安装配置Grafana

官方安装文档： https://grafana.com/grafana/download?platform=linux

http://docs.grafana.org/installation/

$ wget https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana_5.3.0_amd64.deb 
$ sudo dpkg -i grafana_5.3.0_amd64.deb 

$ sudo systemctl status grafana-server    #默认进入了运行的状态

$ sudo systemctl enable grafana-server

关闭
$ sudo service grafana-server stop
启动
$ sudo service grafana-server start

需要开放3000端口的访问权限 https://blog.csdn.net/zbljz98/article/details/80464761

$ iptables -A INPUT -p tcp --dport 3000 -j ACCEPT

我开始的时候就是没做这一步，导致无法在ip:3000端口访问

进入登录页面，首次访问的用户名是admin,  密码是 admin

首次登录之后会要求你更换密码

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