Ansible fetching Stdout key value - json

Question

I need some help regarding, how to fetch specific value using Ansible
My task:
- name: 'check Describe Information'
debug:
var: describeresult.stdout
I need IP address value from below stdout, what should I put in debug var to fetch IP address
TASK [check Describe Information] **********************************************
task path: /home/tom/Getipaddress.yml:28
ok: [127.0.0.1] => {
"describeresult.stdout": {
"failures": [],
"tasks": [
{
"attachments": [
{
"details": [
{
"name": "subnetId",
"value": "subnet-xxxxxxxxxxxxxx"
},
{
"name": "networkInterfaceId",
"value": "eni-xxxxxxxxxxxxxxxx"
},
{
"name": "macAddress",
"value": "xxxxxxxxxxxxxxxxxx"
},
{
"name": "privateIPv4Address",
"value": "xxxxxxxxxxxxxxxxxx"
}
Plus I am using AWS ECS command to generate the above output with --output as a JSON not sure how to use --query to filter or fetch above IP address only

Answer 1

Use json_query. For example
- set_fact:
my_privateIPv4Address: "{{ describeresult.stdout.tasks|
json_query(query) }}"
vars:
query: "[].attachments[].details[?name=='privateIPv4Address'].value"
json_query returns by default a list.

Answer 2

You can use something like this for getting private IP address only
"{{describeresult.stdout['tasks'][0]['attachments'][0]['details'][3]['value']}}"
The above might have slight syntax issues but should work.
I have done something like this earlier for ec2_group_info module in ansible
You can start off by generating output in pieces describeresult.stdout['tasks'] should return JSON for the task attribute.
[0] indicates the first element when there is a box bracket for a JSON implying more than one element/list.
Let me know how it goes.