ansible-edda/plays/services/roles/system_datasets/tasks/main.yml

- name: "create containers dataset"
  community.general.zfs:
    name: "rpool/var/lib/containers"
    state: "present"
    extra_zfs_properties:
      "com.sun:auto-snapshot": "false"

- name: "create services root dataset"
  community.general.zfs:
    name: "rpool/var/lib/{{ ansible_hostname }}"
    state: "present"

- name: "create containers zvol"
  community.general.zfs:
    name: "rpool/var/lib/{{ ansible_hostname }}/containers"
    state: "present"
    extra_zfs_properties:
      volsize: "100G"
      refreservation: "none"
      "com.sun:auto-snapshot": "false"

- name: "format containers zvol"
  community.general.filesystem:
    dev: "/dev/rpool/var/lib/{{ ansible_hostname }}/containers"
    fstype: "ext4"
  register: services_system_datasets_zvol_format

- block:

    - name: "get containers zvol uuid"
      ansible.builtin.command: >-
        blkid -s UUID -o value /dev/rpool/var/lib/{{ ansible_hostname }}/containers
      register: services_system_datasets_zvol_uuid

    - name: "system : add fstab entry and mount containers zvol"
      ansible.posix.mount:
        path: "/var/lib/{{ ansible_hostname }}/containers"
        src: "UUID={{ services_system_datasets_zvol_uuid.stdout }}"
        fstype: "ext4"
        state: "mounted"

  when:
    services_system_datasets_zvol_format.changed

- name: "create data root dataset"
  community.general.zfs:
    name: "rpool/var/lib/{{ ansible_hostname }}/data"
    state: "present"
    extra_zfs_properties:
      canmount: "off"

- name: "create home root dataset"
  community.general.zfs:
    name: "rpool/var/lib/{{ ansible_hostname }}/home"
    state: "present"
    extra_zfs_properties:
      canmount: "off"