kubespray/contrib/dind/roles/dind-host/tasks/main.yaml

- name: set_fact distro_setup
  set_fact:
    distro_setup: "{{ distro_settings[node_distro] }}"

- name: set_fact other distro settings
  set_fact:
    distro_image: "{{ distro_setup['image'] }}"
    distro_init: "{{ distro_setup['init'] }}"
    distro_pid1_exe: "{{ distro_setup['pid1_exe'] }}"
    distro_raw_setup: "{{ distro_setup['raw_setup'] }}"
    distro_raw_setup_done: "{{ distro_setup['raw_setup_done'] }}"
    distro_agetty_svc: "{{ distro_setup['agetty_svc'] }}"

- name: Create dind node containers from "containers" inventory section
  docker_container:
    image: "{{ distro_image }}"
    name: "{{ item }}"
    state: started
    hostname: "{{ item }}"
    command: "{{ distro_init }}"
    #recreate: yes
    privileged: true
    tmpfs:
      - /sys/module/nf_conntrack/parameters
    volumes:
      - /boot:/boot
      - /lib/modules:/lib/modules
      - "{{ item }}:/dind/docker"
  register: containers
  with_items: "{{groups.containers}}"
  tags:
    - addresses

- name: Gather list of containers IPs
  set_fact:
    addresses: "{{ containers.results | map(attribute='ansible_facts') | map(attribute='docker_container') | map(attribute='NetworkSettings') | map(attribute='IPAddress') | list }}"
  tags:
    - addresses

- name: Create inventory_builder helper already set with the list of node containers' IPs
  template:
    src: inventory_builder.sh.j2
    dest: /tmp/kubespray.dind.inventory_builder.sh
    mode: 0755
  tags:
    - addresses

- name: Install needed packages into node containers via raw, need to wait for possible systemd packages to finish installing
  raw: |
    # agetty processes churn a lot of cpu time failing on inexistent ttys, early STOP them, to rip them in below task
    pkill -STOP agetty || true
    {{ distro_raw_setup_done }}  && echo SKIPPED && exit 0
    until [ "$(readlink /proc/1/exe)" = "{{ distro_pid1_exe }}" ] ; do sleep 1; done
    {{ distro_raw_setup }}
  delegate_to: "{{ item._ansible_item_label|default(item.item) }}"
  with_items: "{{ containers.results }}"
  register: result
  changed_when: result.stdout.find("SKIPPED") < 0

- name: Remove gettys from node containers
  raw: |
    until test -S /var/run/dbus/system_bus_socket; do sleep 1; done
    systemctl disable {{ distro_agetty_svc }}
    systemctl stop {{ distro_agetty_svc }}
  delegate_to: "{{ item._ansible_item_label|default(item.item) }}"
  with_items: "{{ containers.results }}"
  changed_when: false

# Running systemd-machine-id-setup doesn't create a unique id for each node container on Debian,
# handle manually
- name: Re-create unique machine-id (as we may just get what comes in the docker image), needed by some CNIs for mac address seeding (notably weave)
  raw: |
    echo {{ item | hash('sha1') }} > /etc/machine-id.new
    mv -b /etc/machine-id.new /etc/machine-id
    cmp /etc/machine-id /etc/machine-id~ || true
    systemctl daemon-reload
  delegate_to: "{{ item._ansible_item_label|default(item.item) }}"
  with_items: "{{ containers.results }}"

- name: Early hack image install to adapt for DIND
  raw: |
    rm -fv /usr/bin/udevadm /usr/sbin/udevadm
  delegate_to: "{{ item._ansible_item_label|default(item.item) }}"
  with_items: "{{ containers.results }}"
  register: result
  changed_when: result.stdout.find("removed") >= 0