Retrieve nested value on a list in Ansible - list

Question

I am producing from VMware datastores collection a list of volumes and their associated tags
I formated them in a JSON type output to be able to feed another system later. The output is working but for the tags section I would like to keep only the name and category_name not the other properties.
This is my playbook :
---
- name: Fetching Datastores
hosts: localhost
tasks:
- name: Gather info from datacenter about specific datastore
community.vmware.vmware_datastore_info:
hostname: 'myesxiHost'
username: 'administrator'
password: 'Password'
validate_certs: False
show_tag: true
delegate_to: localhost
register: ds_info
- set_fact:
ds_info_eph: "{{ ds_info_eph|default([]) + [ {
'name': item.name,
'type': item.type,
'capacity': item.capacity,
'tag': item.tags
} ] }}"
loop: "{{ ds_info.datastores }}"
- name: Output info
debug:
msg: "{{ ds_info_eph }}"
This playbook give me the following output :
ok: [localhost] => {
"msg": [
{
"capacity": 499826819072,
"name": "ESX01_SSD4",
"tag": [
{
"category_id": "urn:vmomi:InventoryServiceCategory:017ad796-b931-4f5b-bd4a-8fee7adaf124:GLOBAL",
"category_name": "Tier",
"description": "",
"id": "urn:vmomi:InventoryServiceTag:6112eeac-ed81-48d4-b7d9-81084b8a415a:GLOBAL",
"name": "Gold"
}
],
"type": "VMFS"
},
{
"capacity": 499826819072,
"name": "ESX01_SSD3",
"tag": [
{
"category_id": "urn:vmomi:InventoryServiceCategory:017ad796-b931-4f5b-bd4a-8fee7adaf124:GLOBAL",
"category_name": "Tier",
"description": "",
"id": "urn:vmomi:InventoryServiceTag:6112eeac-ed81-48d4-b7d9-81084b8a415a:GLOBAL",
"name": "Gold"
}
],
"type": "VMFS"
},
{
"capacity": 499826819072,
"name": "ESX01_SSD5",
"tag": [
{
"category_id": "urn:vmomi:InventoryServiceCategory:017ad796-b931-4f5b-bd4a-8fee7adaf124:GLOBAL",
"category_name": "Tier",
"description": "",
"id": "urn:vmomi:InventoryServiceTag:6112eeac-ed81-48d4-b7d9-81084b8a415a:GLOBAL",
"name": "Gold"
}
],
"type": "VMFS"
},
{
"capacity": 239981297664,
"name": "ESX01_SSD2",
"tag": [
{
"category_id": "urn:vmomi:InventoryServiceCategory:017ad796-b931-4f5b-bd4a-8fee7adaf124:GLOBAL",
"category_name": "Tier",
"description": "",
"id": "urn:vmomi:InventoryServiceTag:6112eeac-ed81-48d4-b7d9-81084b8a415a:GLOBAL",
"name": "Gold"
}
],
"type": "VMFS"
},
{
"capacity": 248034361344,
"name": "ESX01_SSD1",
"tag": [
{
"category_id": "urn:vmomi:InventoryServiceCategory:017ad796-b931-4f5b-bd4a-8fee7adaf124:GLOBAL",
"category_name": "Tier",
"description": "",
"id": "urn:vmomi:InventoryServiceTag:6112eeac-ed81-48d4-b7d9-81084b8a415a:GLOBAL",
"name": "Gold"
}
],
"type": "VMFS"
}
]
}
Instead I would like to have this output :
ok: [localhost] => {
"msg": [
{
"capacity": 499826819072,
"name": "ESX01_SSD4",
"tag": [
{
"category_name": "Tier",
"name": "Gold"
}
],
"type": "VMFS"
},
{
"capacity": 499826819072,
"name": "ESX01_SSD3",
"tag": [
{
"category_name": "Tier",
"name": "Gold"
}
],
"type": "VMFS"
},
{
"capacity": 499826819072,
"name": "ESX01_SSD5",
"tag": [
{
"category_name": "Tier",
"name": "Gold"
}
],
"type": "VMFS"
},
{
"capacity": 239981297664,
"name": "ESX01_SSD2",
"tag": [
{
"category_name": "Tier",
"name": "Gold"
}
],
"type": "VMFS"
},
{
"capacity": 248034361344,
"name": "ESX01_SSD1",
"tag": [
{
"category_name": "Tier",
"name": "Gold"
}
],
"type": "VMFS"
}
]
}
But on the tag section I tried to do in the playbook the following to get only the name and not all the tag item list : 'tag': item.tags.name but I'v got the following error fatal: [localhost]: FAILED! => {"msg": "Unexpected templating type error occurred on ({{ ds_info_eph|default([]) + [ { 'name': item.name, 'type': item.type, 'capacity': item.capacity, 'tag': item.tags.name } ] }}): can only concatenate str (not \"list\") to str"}
My understanding is somehow in that set_fac I have to loop again to get only the tag name and tag category_name but I didn't figure out how to.
Thank you for your help !

Answer 1

Select the attributes from the tag lists, e.g.
- set_fact:
_tags: "{{ ds_info_eph|
map(attribute='tag')|
map('items2dict', 'category_name', 'name')}}"
gives
_tags:
- Tier: Gold
- Tier: Gold
- Tier: Gold
- Tier: Gold
- Tier: Gold
Combine the dictionaries
- set_fact:
result: "{{ result|d([]) + [item.0|combine({'tag': item.1})] }}"
with_together:
- "{{ ds_info_eph }}"
- "{{ _tags|map('dict2items', 'category_name', 'name') }}"
gives
result:
- capacity: 499826819072
name: ESX01_SSD4
tag:
category_name: Tier
name: Gold
type: VMFS
- capacity: 499826819072
name: ESX01_SSD3
tag:
category_name: Tier
name: Gold
type: VMFS
- capacity: 499826819072
name: ESX01_SSD5
tag:
category_name: Tier
name: Gold
type: VMFS
- capacity: 239981297664
name: ESX01_SSD2
tag:
category_name: Tier
name: Gold
type: VMFS
- capacity: 248034361344
name: ESX01_SSD1
tag:
category_name: Tier
name: Gold
type: VMFS