main.yml

---
# If built in molecule, user will be 'ubuntu'
# install docker swarm first

- include_tasks: vagrant_swarm.yml
  when:
    - ansible_user_id == 'ubuntu'

- name: Create base directory structure
  become: true
  file:
    path: "{{ item }}"
    state: directory
    owner: root
    group: root
    mode: 0755
  with_items:
    - "{{ monitor_dir }}"
    - "{{ monitor_dir }}/stacks"

- name: Create directories for prometheus
  become: true
  file:
    path: "{{ item }}"
    state: directory
    owner: 65534
    group: 65534
    mode: 0755
    # recurse: yes
  with_items:
    - "{{ monitor_dir }}/prometheus"
    - "{{ monitor_dir }}/etc/prometheus"

- name: Create directories for grafana
  become: true
  file:
    path: "{{ item }}"
    state: directory
    owner: 472
    group: 472
    mode: 0755
    # recurse: yes
  with_items:
    - "{{ monitor_dir }}/grafana"

- name: Generate config files
  become: true
  template:
    src: prometheus.yml.j2
    dest: "{{ monitor_dir }}/etc/prometheus/prometheus.yml"
    mode: 0644
  register: prom_conf

- name: Check if prometheus is running
  ignore_errors: true
  uri:
    url: "http://{{ ansible_default_ipv4.address }}:9090/graph"
    status_code: 200
  register: result

- name: kill prometheus service if conf file changes
  become: true
  command: docker service rm monitor_prometheus
  when:
    - result.status == 200
    - prom_conf.changed

- name: Generate stack file
  become: true
  template:
    src: monitor-stack.yml.j2
    dest: "{{ monitor_dir }}/stacks/monitor-stack.yml"
    mode: 0644

- name: update docker images
  become: true
  command: "{{ item }}"
  with_items:
    - docker pull grafana/grafana
    - docker pull prom/prometheus
    - docker pull prom/node-exporter
    - docker pull jahrik/pihole-exporter

- name: deploy the monitor stack to docker swarm
  become: true
  command: docker stack deploy -c monitor-stack.yml monitor
  args:
    chdir: "{{ monitor_dir }}/stacks/"

- name: Wait for prometheus port to come up
  wait_for:
    host: "{{ ansible_default_ipv4.address }}"
    port: 9090
    timeout: 30

- name: Wait for grafana port to come up
  wait_for:
    host: "{{ ansible_default_ipv4.address }}"
    port: 3000
    timeout: 30

- name: Wait for prometheus exporter port to come up
  wait_for:
    host: "{{ ansible_default_ipv4.address }}"
    port: 9100
    timeout: 30

- name: Wait for pihole exporter port to come up
  wait_for:
    host: "{{ ansible_default_ipv4.address }}"
    port: 9101
    timeout: 30

- name: docker stack ps monitor
  become: true
  shell: docker stack ps monitor
  register: docker_stack

- debug:
    msg: "Stack {{ docker_stack.stdout_lines }}"