安裝Prometheus和Grafana

(一) 安裝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，在這個文件添加

$ 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

運行 start Prometheus
$ nohup ./prometheus &  

改成systemd服務

$ 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  # 寫入如下內容
[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

Prometheus自帶一個Web網站，默認端口爲9090, http://ip:9090.可以查看表達式搜索結果、報警配置、prometheus配置,exporter狀態等. 

(二) 安裝配置Grafana

官方安裝文檔： 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    #默認進入了運行的狀態

$ sudo systemctl enable grafana-server

需要開放3000端口的訪問權限 https://blog.csdn.net/zbljz98/article/details/80464761

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

我開始的時候就是沒做這一步，導致無法在ip:3000端口訪問

進入登錄頁面，首次訪問的用戶名是admin,  密碼是 admin

首次登錄之後會要求你更換密碼