NewsBlur/ansible/roles/mongo/tasks/main.yml

---
- name: Permissions for mongo
  become: yes
  file:
    state: directory
    mode: 0777
    path: /var/log/mongodb

- name: Get the volume name
  shell: ls /dev/disk/by-id/ | grep -v part
  register: volume_name_raw

- set_fact:
    volume_name: "{{ volume_name_raw.stdout }}"

- debug:
    msg: "{{ volume_name }}"

- name: Create the mount point
  become: yes
  file: 
    path: "/mnt/{{ inventory_hostname | regex_replace('db-|-', '') }}"
    state: directory

- name: Mount volume read-write
  become: yes
  mount:
    path: "/mnt/{{ inventory_hostname | regex_replace('db-|-', '') }}"
    src: "/dev/disk/by-id/{{ volume_name }}"
    fstype: xfs
    opts: defaults,discard
    state: mounted

- name: Copy MongoDB keyfile
  become: yes
  copy:
    content: "{{ mongodb_keyfile }}"
    dest: /srv/newsblur/config/mongodb_keyfile.key
    owner: root
    mode: 0400
  tags:
    - keyfile

- name: Make docker network for newsblurnet
  become: yes
  docker_network:
    name: newsblurnet
  notify: restart docker

- name: Make backup directory
  become: yes
  file:
    path: /opt/mongo/newsblur/backup/
    state: directory
    mode: 0666

- name: Start db-mongo docker container
  become: yes
  docker_container:
    name: mongo
    image: mongo:3.6
    state: started
    container_default_behavior: no_defaults
    hostname: "{{ inventory_hostname }}"
    restart_policy: unless-stopped
    networks_cli_compatible: yes
    network_mode: host
    # network_mode: default
    # networks:
    #   - name: newsblurnet
    #     aliases: 
    #       - mongo
    # ports:
    #   - "27017:27017"
    command: --config /etc/mongod.conf
    volumes:
      - /mnt/{{ inventory_hostname | regex_replace('db-|-', '') }}:/data/db
      - /srv/newsblur/ansible/roles/mongo/templates/mongo.conf:/etc/mongod.conf
      - /srv/newsblur/config/mongodb_keyfile.key:/srv/newsblur/config/mongodb_keyfile.key
      - /var/log/mongodb/:/var/log/mongodb/
      - /opt/mongo/newsblur/backup/:/backup/

- name: Register mongo in consul
  tags: consul
  become: yes
  template:
    src: consul_service.json
    dest: /etc/consul.d/mongo.json
  when: (inventory_hostname | regex_replace('[0-9]+', '')) in ['db-mongo', 'db-mongo-secondary'] or inventory_hostname.startswith('db2')
  notify:
    - reload consul

- name: Register mongo-analytics in consul
  tags: consul
  become: yes
  template:
    src: consul_service.analytics.json
    dest: /etc/consul.d/mongo.json
  when: (inventory_hostname | regex_replace('[0-9]+', '')) == 'db-mongo-analytics' or inventory_hostname.startswith('db3')
  notify:
    - reload consul

- name: Setup logrotate for mongo
  become: yes
  copy: src=logrotate.conf dest=/etc/logrotate.d/mongodb mode=0755
  tags: 
    - logrotate
  
- name: Add sanity checkers cronjob for disk usage
  become: yes
  cron:
    name: disk_usage_sanity_checker
    user: root
    cron_file: /etc/cron.hourly/disk_usage_sanity_checker
    job: >-
      docker pull newsblur/newsblur_python3:latest;
      docker run --rm -it
      OUTPUT=$(eval sudo df / | head -n 2 |  tail -1);
      -v /srv/newsblur:/srv/newsblur
      --network=newsblurnet
      --hostname {{ ansible_hostname }} 
      newsblur/newsblur_python3 /srv/newsblur/utils/monitor_disk_usage.py $OUTPUT
  tags:
    - sanity-checker

- name: Add mongo backup
  cron:
    name: mongo backup
    minute: "0"
    hour: "4"
    job: /srv/newsblur/docker/mongo/backup_mongo.sh
  when: '"db-mongo-secondary1" in inventory_hostname'

- name: Add mongo starred_stories+stories backup
  cron:
    name: mongo backup
    minute: "0"
    hour: "5"
    job: /srv/newsblur/docker/mongo/backup_mongo_stories.sh
  when: '"db-mongo-secondary1" in inventory_hostname'


# Renaming a db-mongo3 to db-mongo2:
#  - Change hostname to db-mongo2 on Digital Ocean (doctl)
#  - Change hostname to db-mongo2 in /etc/hostname
#  - Symlink /mnt/mongo2 to /mnt/mongo3
#  - tf state mv "digitalocean_droplet.db-mongo-primary[2]" "digitalocean_droplet.db-mongo-primary[1]"
#  - tf state mv "digitalocean_volume.mongo_volume[2]" "digitalocean_volume.mongo_volume[1]"