Prometheus➕Grafana monitors node resources

Prometheus是一套开源的系统监控报警框架。Prometheus作为新一代的云原生监控系统，相比传统监控监控系统（Nagios或者Zabbix）拥有众多有点。

Download and install start exporte

[root@localhost ~]# wget https://github.com/prometheus/node_exporter/releases/download/v0.18.1/node_exporter-0.18.1.linux-amd64.tar.gz
[root@localhost ~]# tar zxf node_exporter-0.18.1.linux-amd64.tar.gz 
[root@localhost ~]# mv node_exporter-0.18.1.linux-amd64 /usr/local/node_exporte
[root@localhost ~]# /usr/local/node_exporte/node_exporter &

Download and install Prometheus

[root@localhost ~]# wget https://github.com/prometheus/prometheus/releases/download/v2.10.0/prometheus-2.10.0.linux-amd64.tar.gz
[root@localhost ~]# tar -zxf prometheus-2.10.0.linux-amd64.tar.gz
[root@localhost ~]# mv prometheus-2.10.0.linux-amd64 /usr/local/prometheus

Configure Prometheus

[root@localhost ~]# vim /usr/local/prometheus/prometheus.yml
# 修改如下
  - job_name: 'node'
    static_configs:
    - targets: ['localhost:9100']

Start Prometheus

[root@localhost ~]# /usr/local/prometheus/prometheus --config.file=/usr/local/prometheus/prometheus.yml &

Grafana

[root@localhost ~]# wget https://dl.grafana.com/oss/release/grafana-5.4.2-1.x86_64.rpm
[root@localhost ~]# yum -y install initscripts urw-fonts
[root@localhost ~]# rpm -Uvh grafana-5.4.2-1.x86_64.rpm

Start Grafana

[root@localhost ~]# systemctl start grafana-server

Grafana page configuration
visit http://192.168.1.10:3000

The default user password is admin to
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create the display interface to monitor the data source.

Select

the service port of the host where Prometheus Prometheus is located.

Add a dashboard

. The blank space in the above figure needs to add a json file, which needs to be downloaded from the official website of grafana . Here you can choose the Docker instrument There are many types of disks, mainly for official use. Click here to use the ones to be used next. dashboardAfter entering the page, as shown in the figure, you can download according to the red line in the figure
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and then import the file into the Grafana page, select The data source is Prometheus

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If you let Prometheus monitor multiple
nodes, download, install and start on the node nodeexporte

[root@localhost ~]# wget https://github.com/prometheus/node_exporter/releases/download/v0.18.1/node_exporter-0.18.1.linux-amd64.tar.gz
[root@localhost ~]# tar zxf node_exporter-0.18.1.linux-amd64.tar.gz 
[root@localhost ~]# mv node_exporter-0.18.1.linux-amd64 /usr/local/node_exporte
[root@localhost ~]# /usr/local/node_exporte/node_exporter &

Then go to the Prometheus node to modify the configuration file

[root@localhost ~]# vim /usr/local/prometheus/prometheus.yml
# 添加如下
  - job_name: 'node'
    static_configs:
    - targets: ['localhost:9100','nodeIP:9100'] #node节点依次向后添加

Then re-run Prometheus

[root@localhost ~]# lsof -i:9100
COMMAND     PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
node_expo  9891 root    3u  IPv6  47017      0t0  TCP *:jetdirect (LISTEN)
node_expo  9891 root    5u  IPv6  54418      0t0  TCP localhost.localdomain:jetdirect->localhost.localdomain:50898 (ESTABLISHED)
prometheu 10322 root    8u  IPv4  54416      0t0  TCP localhost.localdomain:51060->192.168.1.20:jetdirect (ESTABLISHED)
prometheu 10322 root   10u  IPv4  54417      0t0  TCP localhost.localdomain:50898->localhost.localdomain:jetdirect (ESTABLISHED)
#先干掉之前的进程
kill -9 PID
#启动
 /usr/local/prometheus/prometheus --config.file=/usr/local/prometheus/prometheus.yml &

Restart Grafana and refresh the page to view

systemctl restart grafana-server

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Prometheus➕Grafana monitors node resources

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