Ansible iterate from a list - ansible

Question

I'm trying to parse a json output (added below) and add it into a new JSON file to save the variables
The values that i need are metadata.name and metadata.namespace.
The following JSON is the file that i need to parse and extract the values. I get this output from the command: kubectl get pod -o json.
{
"apiVersion": "v1",
"items": [
{
"apiVersion": "v1",
"kind": "Pod",
"metadata": {
"creationTimestamp": "2022-12-21T12:18:49Z",
"generateName": "backend-99fb66465-",
"labels": {
"app": "backend",
"pod-template-hash": "99fb66465"
},
"name": "backend-99fb66465-2lxwp",
"namespace": "testingspace",
},
{
"apiVersion": "v1",
"kind": "Pod",
"metadata": {
"creationTimestamp": "2022-12-21T12:18:49Z",
"generateName": "backend-99fb66465-",
"labels": {
"app": "backend",
"pod-template-hash": "99fb66465"
},
"name": "backend-99fb66465-2lxwp",
"namespace": "testingspace",
}
]
[...]
}
My ansible code is this one:
- name: Search for all running pods from file ./data/kubernetes/pods-status
shell: |
cat ./data/kubernetes/pods-status
register: pods
- name: Pods name
set_fact:
podnames: "{{ pods.stdout|from_json|json_query(names) }}"
podkind: "{{ pods.stdout|from_json|json_query(kind) }}"
vars:
names: 'items[*].metadata.name'
kind: 'items[*].kind'
- name: Copy pods information to local file
local_action:
module: copy
dest: "./data/kubernetes/mainpod.json"
#content: "{{ podsjson | to_json }} "
content: "{{ [{'val': item }] }}"
loop: "{{ podnames }}"
I'm expecting to have the following file:
{
"items": {
"name": "backend-99fb66465-2lxwp",
"namespace":"testingspace"
},
{
"name": "backend-99fb66465-2lxwp",
"namespace": "testingspace"
}
}
}
But so far i just have this one:
[{"val": "backup-mysqldump-27875520-d26j4"}]

Answer 1

Given the data in the dictionary for testing
pods:
apiVersion: v1
items:
- apiVersion: v1
kind: Pod
metadata:
creationTimestamp: '2022-12-21T12:18:49Z'
generateName: backend-99fb66465-
labels:
app: backend
pod-template-hash: 99fb66465
name: backend-99fb66465-2lxwp
namespace: testingspace
- apiVersion: v1
kind: Pod
metadata:
creationTimestamp: '2022-12-21T12:18:49Z'
generateName: backend-99fb66465-
labels:
app: backend
pod-template-hash: 99fb66465
name: backend-99fb66465-2lxwp
namespace: testingspace
Declare the query
name_space: "{{ pods|json_query(name_space_query) }}"
name_space_query: 'items[].{name: metadata.name,
namespace: metadata.namespace}'
gives
name_space:
- name: backend-99fb66465-2lxwp
namespace: testingspace
- name: backend-99fb66465-2lxwp
namespace: testingspace
Example of a complete playbook for testing
- hosts: localhost
vars:
pods:
apiVersion: v1
items:
- apiVersion: v1
kind: Pod
metadata:
creationTimestamp: '2022-12-21T12:18:49Z'
generateName: backend-99fb66465-
labels:
app: backend
pod-template-hash: 99fb66465
name: backend-99fb66465-2lxwp
namespace: testingspace
- apiVersion: v1
kind: Pod
metadata:
creationTimestamp: '2022-12-21T12:18:49Z'
generateName: backend-99fb66465-
labels:
app: backend
pod-template-hash: 99fb66465
name: backend-99fb66465-2lxwp
namespace: testingspace
name_space: "{{ pods|json_query(name_space_query) }}"
name_space_query: 'items[].{name: metadata.name,
namespace: metadata.namespace}'
tasks:
- debug:
var: name_space