Ansible playbook showcasing conversion from with_X loops to loop using filters instead of lookup

with2loop.yml

---
- name: Playbook showcasing conversion from with_X loops to loop+filters
  hosts: localhost
  gather_facts: false
  vars:
    items:
      -
        - foo
      -
        - bar

    list:
      - foo
      - bar

    together:
        one:
          - foo
          - bar
        two:
          - baz
          - qux

    dictionary:
      foo: bar
      baz: qux

    list_one:
      - 1
      - 2
      - 3

    list_two:
      - a
      - b

    list_three:
      - orange
      - apple
      - banana

    users:
      - name: alice
        authorized:
          - /tmp/alice/onekey.pub
          - /tmp/alice/twokey.pub
        mysql:
            password: mysql-password
            hosts:
              - "%"
              - "127.0.0.1"
              - "::1"
              - "localhost"
            privs:
              - "*.*:SELECT"
              - "DB1.*:ALL"
        groups:
          - wheel
      - name: bob
        authorized:
          - /tmp/bob/id_rsa.pub
        mysql:
            password: other-mysql-password
            hosts:
              - "db1"
            privs:
              - "*.*:SELECT"
              - "DB2.*:ALL"

  tasks:
    - name: with_items
      debug:
        msg: "{{ item }}"
      with_items: "{{ items }}"
      tags: items

    - name: with_items -> loop
      debug:
        msg: "{{ item }}"
      loop: "{{ items|flatten(levels=1) }}"
      tags: items

    - name: with_indexed_items
      debug:
        msg: "{{ item.0 }} - {{ item.1 }}"
      with_indexed_items: "{{ items }}"
      tags: indexed_items

    - name: with_indexed_items -> loop
      debug:
        msg: "{{ index }} - {{ item }}"
      loop: "{{ items|flatten(levels=1) }}"
      loop_control:
        index_var: index
      tags: indexed_items

    - name: with_flattened
      debug:
        msg: "{{ item }}"
      with_flattened: "{{ items }}"
      tags: flatten

    - name: with_flattened -> loop
      debug:
        msg: "{{ item }}"
      loop: "{{ items|flatten }}"
      tags: flatten

    - name: with_list
      debug:
        msg: "{{ item }}"
      with_list: "{{ list }}"
      tags: list

    - name: with_list -> loop
      debug:
        msg: "{{ item }}"
      loop: "{{ list }}"
      tags: list

    - name: with_together
      debug:
        msg: "{{ item.0 }} - {{ item.1 }}"
      with_together:
        - "{{ together.one }}"
        - "{{ together.two }}"
      tags: together

    - name: with_together -> loop
      debug:
        msg: "{{ item.0 }} - {{ item.1 }}"
      loop: "{{ together.one|zip(together.two)|list }}"
      tags: together

    - name: with_dict
      debug:
        msg: "{{ item.key }} - {{ item.value }}"
      with_dict: "{{ dictionary }}"
      tags: dict

    - name: with_dict -> loop (option 1)
      debug:
        msg: "{{ item.key }} - {{ item.value }}"
      loop: "{{ dictionary|dict2items }}"
      tags: dict

    - name: with_dict -> loop (option 2)
      debug:
        msg: "{{ item.0 }} - {{ item.1 }}"
      loop: "{{ dictionary|dictsort }}"
      tags: dict

    - name: with_sequence
      debug:
        msg: "{{ item }}"
      with_sequence: start=0 end=4 stride=2 format=testuser%02x
      tags: sequence

    - name: with_sequence -> loop
      debug:
        msg: "{{ 'testuser%02x'|format(item) }}"
      # range is exclusive of the end point
      loop: "{{ range(0, 4 + 1, 2)|list }}"
      tags: sequence

    - name: with_subelements
      debug:
        msg: "{{ item.0.name }} - {{ item.1 }}"
      with_subelements:
        - "{{ users }}"
        - mysql.hosts
      tags: subelements

    - name: with_subelements -> loop
      debug:
        msg: "{{ item.0.name }} - {{ item.1 }}"
      loop: "{{ users|subelements('mysql.hosts') }}"
      tags: subelements

    - name: with_cartesian
      debug:
        msg: "{{ item.0 }} - {{ item.1 }} - {{ item.2 }}"
      with_cartesian:
        - "{{ list_one }}"
        - "{{ list_two }}"
        - "{{ list_three }}"
      tags: cartesian

    - name: with_cartesian -> loop
      debug:
        msg: "{{ item.0 }} - {{ item.1 }} - {{ item.2 }}"
      loop: "{{ list_one|product(list_two, list_three)|list }}"
      tags: cartesian

    - name: with_nested
      debug:
        msg: "{{ item.0 }} - {{ item.1 }}"
      with_nested:
        - "{{ list_one }}"
        - "{{ list_two }}"
      tags: nested

    - name: with_nested -> loop
      debug:
        msg: "{{ item.0 }} - {{ item.1 }}"
      loop: "{{ list_one|product(list_two)|list }}"
      tags: nested

    - name: with_random_choice
      debug:
        msg: "{{ item }}"
      with_random_choice: "{{ list }}"
      tags: random

    - name: with_random_choice -> loop (Wait! no loop is even needed here)
      debug:
        msg: "{{ list|random }}"
      tags: random

z-with2loop.out

Using /Users/matt/projects/ansibledev/playbooks/ansible.cfg as config file

PLAY [Playbook showcasing conversion from with_X loops to loop] ******************************************************************************************************************************************************************************

TASK [with_items] ****************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo"
}
ok: [localhost] => (item=None) => {
    "msg": "bar"
}

TASK [with_items -> loop] ********************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo"
}
ok: [localhost] => (item=None) => {
    "msg": "bar"
}

TASK [with_indexed_items] ********************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "0 - foo"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - bar"
}

TASK [with_indexed_items -> loop] ************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=foo) => {
    "index": 0,
    "msg": "0 - foo"
}
ok: [localhost] => (item=bar) => {
    "index": 1,
    "msg": "1 - bar"
}

TASK [with_flattened] ************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo"
}
ok: [localhost] => (item=None) => {
    "msg": "bar"
}

TASK [with_flattened -> loop] ****************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo"
}
ok: [localhost] => (item=None) => {
    "msg": "bar"
}

TASK [with_list] *****************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo"
}
ok: [localhost] => (item=None) => {
    "msg": "bar"
}

TASK [with_list -> loop] *********************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo"
}
ok: [localhost] => (item=None) => {
    "msg": "bar"
}

TASK [with_together] *************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo - baz"
}
ok: [localhost] => (item=None) => {
    "msg": "bar - qux"
}

TASK [with_together -> loop] *****************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo - baz"
}
ok: [localhost] => (item=None) => {
    "msg": "bar - qux"
}

TASK [with_dict] *****************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo - bar"
}
ok: [localhost] => (item=None) => {
    "msg": "baz - qux"
}

TASK [with_dict -> loop (option 1)] **********************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo - bar"
}
ok: [localhost] => (item=None) => {
    "msg": "baz - qux"
}

TASK [with_dict -> loop (option 2)] **********************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "baz - qux"
}
ok: [localhost] => (item=None) => {
    "msg": "foo - bar"
}

TASK [with_sequence] *************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "testuser00"
}
ok: [localhost] => (item=None) => {
    "msg": "testuser02"
}
ok: [localhost] => (item=None) => {
    "msg": "testuser04"
}

TASK [with_sequence -> loop] *****************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "testuser00"
}
ok: [localhost] => (item=None) => {
    "msg": "testuser02"
}
ok: [localhost] => (item=None) => {
    "msg": "testuser04"
}

TASK [with_subelements] **********************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "alice - %"
}
ok: [localhost] => (item=None) => {
    "msg": "alice - 127.0.0.1"
}
ok: [localhost] => (item=None) => {
    "msg": "alice - ::1"
}
ok: [localhost] => (item=None) => {
    "msg": "alice - localhost"
}
ok: [localhost] => (item=None) => {
    "msg": "bob - db1"
}

TASK [with_subelements -> loop] **************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "alice - %"
}
ok: [localhost] => (item=None) => {
    "msg": "alice - 127.0.0.1"
}
ok: [localhost] => (item=None) => {
    "msg": "alice - ::1"
}
ok: [localhost] => (item=None) => {
    "msg": "alice - localhost"
}
ok: [localhost] => (item=None) => {
    "msg": "bob - db1"
}

TASK [with_cartesian] ************************************************************************************************************************************************************************************************************************
[[1, 2, 3], ['a', 'b'], ['orange', 'apple', 'banana']]
ok: [localhost] => (item=None) => {
    "msg": "1 - a - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - a - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - a - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - b - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - b - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - b - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - a - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - a - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - a - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - b - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - b - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - b - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - a - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - a - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - a - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - b - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - b - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - b - banana"
}

TASK [with_cartesian -> loop] ****************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "1 - a - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - a - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - a - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - b - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - b - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - b - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - a - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - a - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - a - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - b - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - b - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - b - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - a - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - a - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - a - banana"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - b - orange"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - b - apple"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - b - banana"
}

TASK [with_nested] ***************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "1 - a"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - b"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - a"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - b"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - a"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - b"
}

TASK [with_nested -> loop] *******************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "1 - a"
}
ok: [localhost] => (item=None) => {
    "msg": "1 - b"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - a"
}
ok: [localhost] => (item=None) => {
    "msg": "2 - b"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - a"
}
ok: [localhost] => (item=None) => {
    "msg": "3 - b"
}

TASK [with_fileglob] *************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "/Users/matt/projects/ansibledev/playbooks/with2loop.yml"
}

TASK [with_fileglob -> loop] *****************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "/Users/matt/projects/ansibledev/playbooks/with2loop.yml"
}

TASK [with_random_choice] ********************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
    "msg": "foo"
}

TASK [with_random_choice -> loop (Wait! no loop is even needed here)] ************************************************************************************************************************************************************************
ok: [localhost] => {
    "msg": "foo"
}

PLAY RECAP ***********************************************************************************************************************************************************************************************************************************
localhost                  : ok=25   changed=0    unreachable=0    failed=0