Ansible : Loop inside loop

Question

On ansible [core 2.13.3] my var.yml file is like this :

vlans: Servers: vlan_id: 10 ip: 192.168.22.20 mask: 255.255.255.0 mode: tagged: 1/1,1/2 untagged: 1/3 Clients: vlan_id: 20 mode: tagged: 1/1,1/3 Printers: vlan_id: 30

The objective is to launch one task for each elements in vlans (Servers, Clients, Printers...) and for each mode (tagged, untagged, forbid...).

I successful iterate on vlans but not in vlans and mode. I can't find the good way to success nested loop. Try everything like subelement, with_subelements, loop_nested without success.

 - name: Set member of vlan arubaoss_vlan: command: config_vlan_port config: "create" vlan_id: "{{ item.value.vlan_id }}" port_id: "{{ item.value.port | default('') }}" port_mode: "{{ item.value.mode | default('POM_UNTAGGED') | regex_replace('^tagged$', 'POM_TAGGED_STATIC') | regex_replace('^untagged$', 'POM_UNTAGGED') | regex_replace('^forbid$', 'POM_FORBIDDEN') }}" api_version: "{{ ansible_api_version }}" use_ssl: "{{ ansible_use_ssl }}" port: "{{ ansible_port }}" host: "{{ ansible_host }}" username: "{{ ansible_user }}" password: "{{ ansible_password }}" loop: "{{ lookup('dict', vlans) }}" when: "'port' in dict(item)" tags: - vlans - vlans_mode

How I can make nested loop in Ansible ?

 - name: Debug2 debug: msg: "Name: {{ item.key }} - mode: {{ item.value.mode }}" loop: "{{ lookup('dict', vlans) }}" when: "'mode' in dict(item.value)" tags: - debug

Debug 2 return :

ok: [sw39stack01.group.corp] => (item={'key': 'Servers', 'value': {'vlan_id': 10, 'ip': '192.168.22.20', 'mask': '255.255.255.0', 'mode': {'tagged': '1/1,1/2', 'untagged': '1/3'}}}) => { "msg": "Name: Servers - mode: {'tagged': '1/1,1/2', 'untagged': '1/3'}" } ok: [sw39stack01.group.corp] => (item={'key': 'Clients', 'value': {'vlan_id': 20, 'mode': {'tagged': '1/1,1/3'}}}) => { "msg": "Name: Clients - mode: {'tagged': '1/1,1/3'}" } skipping: [sw39stack01.group.corp] => (item={'key': 'Printers', 'value': {'vlan_id': 30}}) => { "ansible_loop_var": "item", "item": { "key": "Printers", "value": { "vlan_id": 30 } } }

Best regards,

Vladimir Botka · Accepted Answer · 2023-04-27 23:32:50Z

Convert the dictionaries mode to lists

 modes: | {% for k,v in vlans.items() %} {{ k }}: mode: {{ v.mode|d({})|dict2items }} {% endfor %} vlans2: "{{ vlans|combine(modes|from_yaml, recursive=true) }}"

gives

 vlans2: Clients: mode: - key: tagged value: 1/1,1/3 vlan_id: 20 Printers: mode: [] vlan_id: 30 Servers: ip: 192.168.22.20 mask: 255.255.255.0 mode: - key: tagged value: 1/1,1/2 - key: untagged value: 1/3 vlan_id: 10

Convert the dictionary vlans2 to a list and iterate with subelements value.mode

 - debug: msg: "{{ item.0.key }} {{ item.1.key }} {{ item.1.value }}" loop: "{{ vlans2|dict2items|subelements('value.mode') }}"

gives (abridged)

 msg: Servers tagged 1/1,1/2 msg: Servers untagged 1/3 msg: Clients tagged 1/1,1/3

^{Example of a complete playbook
- hosts: localhost vars: vlans: Servers: vlan_id: 10 ip: 192.168.22.20 mask: 255.255.255.0 mode: tagged: 1/1,1/2 untagged: 1/3 Clients: vlan_id: 20 mode: tagged: 1/1,1/3 Printers: vlan_id: 30 modes: | {% for k,v in vlans.items() %} {{ k }}: mode: {{ v.mode|d({})|dict2items }} {% endfor %} vlans2: "{{ vlans|combine(modes|from_yaml, recursive=true) }}" tasks: - debug: var: modes|from_yaml - debug: var: vlans2 - debug: msg: "{{ item.0.key }} {{ item.1.key }} {{ item.1.value }}" loop: "{{ vlans2|dict2items|subelements('value.mode') }}"}

Isopote42 · Accepted Answer · 2023-04-27 20:13:32Z

Inventory file are edited like this:

vlans: - name: Servers vlan_id: 10 ip: 192.168.22.20 mask: 255.255.255.0 mode: - tagged: 1/1,1/2 - untagged: 1/3 - name: Clients vlan_id: 20 mode: - tagged: 1/1,1/3 - name: Printers vlan_id: 30

And query is used:

 - name: Debug1 ansible.builtin.debug: var=item loop: "{{ query('subelements', vlans, 'mode', {'skip_missing': True}) }}" tags: - debug

Output work as expected:

ok: [sw] => (item=[{'name': 'Servers', 'vlan_id': 10, 'ip': '192.168.22.20', 'mask': '255.255.255.0'}, {'tagged': '1/1,1/2'}]) => { "ansible_loop_var": "item", "item": [ { "ip": "192.168.22.20", "mask": "255.255.255.0", "name": "Servers", "vlan_id": 10 }, { "tagged": "1/1,1/2" } ] } ok: [sw] => (item=[{'name': 'Servers', 'vlan_id': 10, 'ip': '192.168.22.20', 'mask': '255.255.255.0'}, {'untagged': '1/3'}]) => { "ansible_loop_var": "item", "item": [ { "ip": "192.168.22.20", "mask": "255.255.255.0", "name": "Servers", "vlan_id": 10 }, { "untagged": "1/3" } ] }

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