infra-nimbus/ansible/roles/nimbus-stats/tasks/main.yml

---
- name: Make sure python3 is installed
  apt:
    name:
      - python3
      - python3-pip

- name: Install ElasticSearch python module
  pip:
    name: elasticsearch
    executable: pip3

- name: Find out the name of ES load balancer
  uri:
    url: '{{ consul_query_url }}'
  register: es_lbs

- name: Verify a load balancer was found
  assert:
    that: es_lbs.json | length > 0
    quiet: true
    fail_msg: 'No ElasticSearch LB found!'

- name: Install stat collecting script
  copy:
    src: collect.py
    dest: '{{ nimbus_stats_script }}'
    mode: 0755
  register: nimbus_script

- name: Create www directory
  file:
    path: '{{ nimbus_stats_web_root }}'
    state: directory
    owner: www-data
    group: www-data
    recurse: true
    mode: 0755

- name: Create nginx config
  template:
    src: proxy.conf.j2
    dest: '/etc/nginx/sites-available/{{ nimbus_stats_domain | mandatory }}.conf'
  notify:
    - reload nginx

- name: Enable site
  file:
    src: '/etc/nginx/sites-available/{{ nimbus_stats_domain | mandatory }}.conf'
    dest: '/etc/nginx/sites-enabled/{{ nimbus_stats_domain | mandatory }}.conf'
    state: link

- name: Enable HTTPS port
  iptables:
    comment: 'HTTPS'
    chain: INPUT
    jump: ACCEPT
    source: '0.0.0.0/0'
    protocol: tcp
    destination_port: 443
  notify:
    - Save iptables rules

- name: Set systemd timer
  include_role: name=systemd-timer
  vars:
    systemd_timer_name: '{{ nimbus_stats_service_name }}'
    systemd_timer_description: 'Generates stats for Nimbus cluster.'
    systemd_timer_user: 'www-data'
    systemd_timer_frequency: '*:0/5' # every 5 minutes
    systemd_timer_timeout_sec: 120
    systemd_timer_requires_extra: 'network.target'
    systemd_timer_script_content: |
      #!/usr/bin/env bash
      exec {{ nimbus_stats_script }} \
          -H {{ es_lbs.json[0].ServiceAddress }} \
          -o {{ nimbus_stats_json }}

- name: Run the script before Nginx configuration
  systemd:
    name: '{{ nimbus_stats_service_name }}'
    state: 'started'