Prototype the role

roles/ping_exporter/defaults/main.yml

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+---
+ping_exporter_version: "v1.2.1"
+ping_exporter_interval: "5s"
+ping_exporter_timeout: "4s"
+ping_exporter_history_size: 42
+ping_exporter_payload_size: 56
+ping_exporter_targets:
+  - "1.1.1.1"

roles/ping_exporter/handlers/main.yml

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+---
+- name: "Restart-ping-exporter"
+  ansible.builtin.systemd:
+    name: ping_exporter
+    state: restarted
+    enabled: true
+    daemon_reload: true

roles/ping_exporter/meta/main.yml

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+---
+galaxy_info:
+  author: "Alexander Gorelyshev"
+  company: "Genlab, LLC"
+  description: "Deploy czerwonk/ping_exporter as a systemd unit"
+  license: "GPL-2.0-or-later"
+  min_ansible_version: "2.1"
+
+  platforms:
+    - name: "Ubuntu"
+      versions: ["focal"]
+
+  galaxy_tags: ["prometheus"]
+
+dependencies: []

roles/ping_exporter/molecule/default/converge.yml

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+---
+- name: Converge
+  hosts: all
+  roles:
+    - role: "genlab.common.ping_exporter"
+      ping_exporter_targets:
+        - "127.0.0.1"

roles/ping_exporter/molecule/default/molecule.yml

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+---
+dependency:
+  name: galaxy
+
+driver:
+  name: docker
+
+platforms:
+  - name: ${MOLECULE_DISTRO:-ubuntu2404}
+    image: geerlingguy/docker-${MOLECULE_DISTRO:-ubuntu2404}-ansible:latest
+    pre_build_image: true
+    command: ${MOLECULE_DOCKER_COMMAND:-""}
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup:rw
+    cgroupns_mode: host
+    privileged: true
+
+provisioner:
+  name: ansible
+
+verifier:
+  name: ansible
+
+lint: |
+  set -e
+  yamllint .
+  ansible-lint .

roles/ping_exporter/molecule/default/verify.yml

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+---
+- name: Verify
+  hosts: all
+  gather_facts: false
+  any_errors_fatal: true
+
+  tasks:
+    - name: "Include default vars"
+      ansible.builtin.include_vars:
+        dir: "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/defaults/"
+        extensions: ['yml']
+
+    # kics-scan ignore-block
+    - name: "Check if /metrics endpoint is reachable"
+      retries: 10
+      delay: 2
+      register: ping_exporter_metrics_check
+      until: ping_exporter_metrics_check.status == 200
+      ansible.builtin.uri:
+        url: "http://127.0.0.1:9427/metrics"
+        return_content: true
+        status_code: 200
+        timeout: 5
+
+    - name: "Fail if /metrics doesn't contain ping_exporter metrics"
+      ansible.builtin.assert:
+        that: "'ping_up' in ping_exporter_metrics_check.content"
+        fail_msg: "ping_exporter /metrics endpoint doesn't contain ping_up metrics!"
+        success_msg: "ping_up metrics availble from /metrics"

roles/ping_exporter/tasks/main.yml

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+---
+# kics-scan disable=2e8d4922-8362-4606-8c14-aa10466a1ce3
+
+- name: "Install the 'ping_exporter' package from Github (Debian)"
+  tags: ping_exporter
+  when: ansible_os_family == "Debian"
+  notify: "Restart-ping-exporter"
+  vars:
+    version: "{{ ping_exporter_version }}"
+    version_without_v: "{{ version | regex_replace('^v', '') }}"
+    base_url: "https://github.com/czerwonk/ping_exporter/releases/download"
+    full_url: "{{ base_url }}/{{ version }}/ping_exporter_{{ version_without_v }}_linux_amd64.deb"
+  ansible.builtin.apt:
+    deb: "{{ full_url }}"
+    state: present
+
+- name: "Install the 'ping_exporter' package from Github (RHEL)"
+  tags: ping_exporter
+  when: ansible_os_family == "RHEL"
+  notify: "Restart-ping-exporter"
+  vars:
+    version: "{{ ping_exporter_version }}"
+    version_without_v: "{{ version | regex_replace('^v', '') }}"
+    base_url: "https://github.com/czerwonk/ping_exporter/releases/download"
+    full_url: "{{ base_url }}/{{ version }}/ping_exporter_{{ version_without_v }}_linux_amd64.rpm"
+  ansible.builtin.dnf:
+    name: "{{ full_url }}"
+    state: present
+
+- name: "Push the configuration file"
+  tags: ping_exporter
+  notify: "Restart-ping-exporter"
+  ansible.builtin.template:
+    src: "config.yml.j2"
+    dest: "/etc/ping_exporter/config.yml"
+    owner: ping_exporter
+    group: root
+    mode: "0644"

roles/ping_exporter/templates/config.yml.j2

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+# List of target hosts (IP addresses or host names) to ping.
+targets:
+{% for target in ping_exporter_targets %}
+  - {{ target }}
+{% endfor %}
+
+dns:
+  # enforce a specific DNS server for host name lookups (optional,
+  # defaults to system rsesolver)
+  #nameserver: 1.1.1.1
+
+  # refresh interval for host name (optional)
+  #refresh: 2m45s
+
+ping:
+  interval:     {{ ping_exporter_interval }}      # how often to ping a target?
+  timeout:      {{ ping_exporter_timeout }}       # timeout for a single ICMP Echo Request
+  history-size: {{ ping_exporter_history_size }}  # number of results to keep per target
+  payload-size: {{ ping_exporter_payload_size }}  # message size for ICMP Echo Requests

roles/ping_exporter/vars/main.yml

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+---