node_exporter.yml

---

- hosts: homelab

  vars:
    application: node_exporter

    docker_network: "{{ networks.pub }}"

  tasks:
    - name: Create config folder
      ansible.builtin.file:
        path: "{{ config_directory }}"
        state: directory
        owner: "{{ common_user }}"
        group: "{{ common_group }}"
        mode: "0771"

    - name: Create scripts folder
      ansible.builtin.file:
        path: "{{ config_directory }}/textfile-collector-scripts"
        state: directory
        owner: "{{ common_root_id }}"
        group: "{{ common_root_group }}"
        mode: "0775"
      register: _scripts_dir

    - name: Install prometheus_client python package
      ansible.builtin.apt:
        name: python3-prometheus-client

    - name: Clone node-exporter-textfile-collector-scripts repo
      ansible.builtin.git:
        repo: https://github.com/prometheus-community/node-exporter-textfile-collector-scripts.git
        dest: "{{ _scripts_dir.path }}"
        update: true
        single_branch: true

    - name: Update apt cache
      ansible.builtin.apt:
        update_cache: true
        cache_valid_time: 86400
      changed_when: false

    - name: Install collector packages
      ansible.builtin.apt:
        name:
          - moreutils
          - ipmitool
          - smartmontools
        state: present

    - name: Create textfile folder
      ansible.builtin.file:
        path: "{{ config_directory }}/textfiles"
        state: directory
        owner: "{{ common_user }}"
        group: "{{ common_group }}"
        mode: "0775"
      register: _textfiles_folder

    - name: Create textfile collector cronjobs
      ansible.builtin.cron:
        name: "{{ item.name }}"
        minute: "*/1"
        job: "({{ item.job }} | sponge {{ _textfiles_folder.path }}/{{ item.name }}.prom) && chmod 644 {{ _textfiles_folder.path }}/{{ item.name }}.prom"
      loop:
        -
          name: smartmon
          job: "PATH=$PATH:/usr/sbin/ {{ _scripts_dir.path }}/smartmon.py"
        -
          name: apt
          job: "{{ _scripts_dir.path }}/apt_info.py"
        -
          name: ipmitool
          job: "ipmitool sensor | {{ _scripts_dir.path }}/ipmitool"

    - name: Create container
      ansible.builtin.include_role:
        name: docker_container
      vars:
        image: quay.io/prometheus/node-exporter:v1.8.2
        command:
          - "--path.rootfs=/host"
          - "--collector.mountstats"
          - "--collector.filesystem.fs-types-exclude=^(tmpfs|vfat|rpc_pipefs|fuse.lxcfs|rootfs|squashfs|nsfs)$"
          - "--collector.textfile.directory=/textfiles"
          - "--no-collector.arp"
          - "--no-collector.bcache"
          - "--no-collector.bonding"
          - "--no-collector.conntrack"
          - "--no-collector.cpufreq"
          - "--no-collector.edac"
          - "--no-collector.entropy"
          - "--no-collector.filefd"
          - "--no-collector.infiniband"
          - "--no-collector.ipvs"
          - "--no-collector.netclass"
          - "--no-collector.netdev"
          - "--no-collector.netstat"
          - "--no-collector.nfsd"
          - "--no-collector.pressure"
          - "--no-collector.sockstat"
          - "--no-collector.stat"
          - "--no-collector.vmstat"
          - "--no-collector.xfs"
        pid_mode: host
        capabilities:
          - SYS_TIME
        volumes:
          - "/:/host:ro,rslave"
          - "{{ _textfiles_folder.path }}:/textfiles"
        comparisons:
          labels: allow_more_present
        metrics:
          - port: 9100