ansible-k8s-node_exporter.yaml

---

- hosts: k8s-cluster
  gather_facts: yes
  vars:
    version: 1.0.1
  tasks:
    
    - unarchive:
        src: "https://github.com/prometheus/node_exporter/releases/download/v{{ version }}/node_exporter-{{ version }}.linux-amd64.tar.gz"
        dest: /opt
        remote_src: yes
    
    - file:
        state: link
        src: "/opt/node_exporter-{{ version }}.linux-amd64/node_exporter"
        dest: "/usr/local/sbin/node_exporter"
    
    - block:
        - set_fact:
            command: '/usr/local/sbin/node_exporter --web.listen-address="{{ hostvars[inventory_hostname]["ip"] }}:9100" --web.disable-exporter-metrics --collector.systemd --collector.processes --collector.mountstats --collector.logind'
      rescue:
        - set_fact:
            command: '/usr/local/sbin/node_exporter --web.listen-address="{{ hostvars[inventory_hostname]["ansible_enp8s0.4001"]["ipv4"]["address"] }}:9100" --web.disable-exporter-metrics --collector.systemd --collector.processes --collector.mountstats --collector.logind'
    
    - debug:
        msg: "{{ command }}"
    
    - copy:
        dest: /etc/systemd/system/node_exporter.service
        content: |
          [Unit]
          Description=node_exporter.service
          
          [Service]
          ExecStart={{ command }}
          Restart=always
          RestartSec=15s
          TimeoutStartSec=30s
          
          [Install]
          WantedBy=multi-user.target
    
    - block:
      - systemd:
          name: node_exporter.service
          daemon_reload: yes
          state: restarted
          enabled: yes
      rescue:
      - shell: systemctl daemon-reload
      - shell: systemctl enable node_exporter.service
      - shell: systemctl start node_exporter.service

inv.ini

[all]
k8s01 ansible_host=1.1.1.1 ip=10.0.0.1
k8s02 ansible_host=1.1.1.2 ip=10.0.0.2
k8s03 ansible_host=1.1.1.3 ip=10.0.0.3

[kube-master]
k8s01
k8s02
k8s03

[etcd]
k8s01
k8s02
k8s03

[kube-node]
k8s01
k8s02
k8s03

[k8s-cluster:children]
kube-master
kube-node