CentOS 8
Sponsored Link

Prometheus : Add Monitoring Target
2020/07/17
 
Add Monitoring Target Nodes.
[1] Install [node-exporter] package on the Node you'd like to add that includes features to get metric data of general resource on the System like CPU or Memory usage
[root@node01 ~]# cat > /etc/yum.repos.d/prometheus.repo <<'EOF' 
[prometheus]
name=prometheus
baseurl=https://packagecloud.io/prometheus-rpm/release/el/$releasever/$basearch
repo_gpgcheck=1
enabled=1
gpgkey=https://packagecloud.io/prometheus-rpm/release/gpgkey
       https://raw.githubusercontent.com/lest/prometheus-rpm/master/RPM-GPG-KEY-prometheus-rpm
gpgcheck=1
metadata_expire=300
EOF 

[root@node01 ~]#
dnf -y install node_exporter
[root@node01 ~]#
systemctl enable --now node_exporter
[2] If Firewalld is running, allow ports.
[root@node01 ~]#
firewall-cmd --add-port=9100/tcp --permanent

success
[root@node01 ~]#
firewall-cmd --reload

success
[3] Add setting on Prometheus Server Configuration.
[root@dlp ~]#
vi /etc/prometheus/prometheus.yml
  # line 33: add new Host to [targets] line
    - job_name: node
    static_configs:
      - targets: ['localhost:9100', 'node01.srv.world:9100']

  # alternatively, if you'd like to add to another group,
  # add [job_name] section like follows
  # any name is OK for [job_name]
  - job_name: Hiroshima
    static_configs:
      - targets: ['node01.srv.world:9100']

[root@dlp ~]#
systemctl restart prometheus
[4] Access to the Prometheus Web UI and click [Status] - [Targets] to verify new nodes are listed.
[5] To input query directly, it's possbile to display specific Job or Node.
The example below shows a Job for [node_load5]. ⇒ node_load5{job="Hirosima"}
[6] The example below shows a Node for [node_procs_running]. ⇒ node_procs_running{instance=~"node01.*"}
Matched Content