Ansible examples

common_tasks_apt.yml

---

- name: ensure wheezy-backports is present
  apt_repository: repo="deb http://ftp.nl.debian.org/debian/ wheezy-backports main contrib non-free" state=present update_cache=yes
  when: ansible_distribution_release == 'wheezy'

- name: ensure jessie-backports is present
  apt_repository: repo="deb http://ftp.nl.debian.org/debian/ jessie-backports main contrib non-free" state=present update_cache=yes
  when: ansible_distribution_release == 'jessie'

- name: ensure apt cache is up-to-date
  apt: update_cache=yes cache_valid_time=86400

- name: install default list of packages without configuration
  apt: pkg={{ item }}
  with_items:
    - ack-grep
    - apt-listchanges
    - apt-show-versions
    - apt-transport-https
    - aptitude
    - atop
    - autojump
    - ca-certificates
    - curl
    - dnsutils
    - git
    - htop
    - iftop
    - iotop
    - less
    - lsb-release
    - lsof
    - man
    - mc
    - psmisc
    - python
    - rsync
    - screen
    - sudo
    - sysstat
    - tig
    - vim
    - zsh

- name: install packages on jessie and later
  apt: pkg={{ item }}
  when: ansible_lsb.codename == "jessie" or ansible_lsb.codename == "stretch"
  with_items:
    - glances
    - libpam-systemd
    - silversearcher-ag

docker_handlers_main.yml

---

- name: reload systemd
  command: systemctl daemon-reload

- name: restart docker-engine
  service: name=docker state=restarted enabled=yes
# systemd module is available in Ansible 2.2
#  systemd: name=docker state=restarted enabled=yes daemon_reload=yes

- name: restart newrelic-sysmond
  service: name=newrelic-sysmond state=restarted

- name: update grub
  command: update-grub

docker_tasks_main.yml

---

# 'shrink' option is available in Ansible ≥2.2
- name: create docker metadata lv
  lvol: vg=vg0 lv=docker-metadata size=1g # shrink=no

- name: create docker data lv
  lvol: vg=vg0 lv=docker-data size=10g # shrink=no

- name: ensure docker.service.d directory exists
  file: path=/etc/systemd/system/docker.service.d state=directory mode=0755 owner=root group=root
  
- name: configure docker storage backend
  template: src=docker.j2 dest=/etc/systemd/system/docker.service.d/override.conf mode=0544 owner=root group=root
  notify:
    - reload systemd
    - restart docker-engine

- name: add docker repository key
  apt_key: id=58118E89F3A912897C070ADBF76221572C52609D keyserver=hkp://p80.pool.sks-keyservers.net:80 state=present

- name: ensure docker repo is present
  apt_repository: repo="deb https://apt.dockerproject.org/repo debian-stretch main" state=present update_cache=yes
  when: ansible_lsb.codename == 'stretch'

# Docker package got removed from stretch, so we cannot uninstall it
# - name: ensure distro docker packages are not installed
#   action: apt pkg={{ item }} state=absent purge=yes
#   with_items:
#   - "docker.io*"

- name: ensure xfsprogs is installed
  apt: pkg=xfsprogs state=latest

- name: ensure docker-engine is installed
  apt: pkg=docker-engine state=latest

- name: fetch and install docker-compose
  get_url:
    dest: /usr/local/bin/docker-compose
    url: "https://github.com/docker/compose/releases/download/{{ docker_compose_version }}/docker-compose-{{ ansible_system }}-{{ ansible_architecture }}"
    mode: 0755

- name: update kernel config to enable swap accounting
  lineinfile: dest=/etc/default/grub state=present regexp="^GRUB_CMDLINE_LINUX_DEFAULT=.*$" line="GRUB_CMDLINE_LINUX_DEFAULT=\"swapaccount=1 consoleblank=0\""
  notify:
    - update grub

# https://github.com/elastic/elasticsearch-docker/blob/7c1dc434d32b88b414180cbddc9412acb41cb14c/README.md
- name: set vm.max_map_count to 262144 in sysctl
  sysctl: name={{ item.key }} value={{ item.value }}
  with_items:
    - { key: "vm.max_map_count", value: "262144" }

- name: add new relic user to group docker
  user: name=newrelic groups=docker append=yes
  notify:
    - restart newrelic-sysmond

docker_templates_docker.j2

# {{ ansible_managed }}

[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H fd:// -s devicemapper --storage-opt dm.datadev=/dev/vg0/docker-data --storage-opt dm.metadatadev=/dev/vg0/docker-metadata