Ansible / jmespath - 1d list to zipped list of dictionaries - ansible

Question

I'm attempting to transform a 1d list of AWS EC2 IDs into a list of dictionaries suitable for usage as the targets param to the Ansible elb_target_group module.
Sample input:
TASK [debug]
ok: [localhost] => {
"instance_ids": [
"i-1111",
"i-2222",
"i-3333"
]
}
Desired output:
TASK [debug]
ok: [localhost] => {
"targets": [
{"Id": "i-1111", "Port": 6443},
{"Id": "i-2222", "Port": 6443},
{"Id": "i-3333", "Port": 6443},
]
}
What I've tried: a json_query / JMESPath expression which confusingly returns null values:
---
- name: test
hosts: localhost
connection: local
vars:
instance_ids:
- i-1111
- i-2222
- i-3333
keys_list:
- Id
- Port
tasks:
- debug: var=instance_ids
- debug:
msg: "{{ instance_ids | zip_longest([6443], fillvalue=6443) | list }}" # Halfway there...
- debug:
msg: "{{ instance_ids | zip_longest([6443], fillvalue=6443) | list | map('json_query', '{Id: [0], Port: [1]}') | list }}"
Output:
TASK [debug]
ok: [localhost] => {
"msg": [
[
"i-1111",
6443
],
[
"i-2222",
6443
],
[
"i-3333",
6443
]
]
}
TASK [debug]
ok: [localhost] => {
"msg": [
{
"Id": null,
"Port": null
},
{
"Id": null,
"Port": null
},
{
"Id": null,
"Port": null
}
]
}
How should I adjust the '{Id: [0], Port: [1]}' part ?

Answer 1

Stumbled my way to a working solution with json_query and a JMESPath int literal:
"{{ instance_ids | json_query('[*].{Id: #, Port: `6443`}') }}"
Example:
- name: test
hosts: localhost
connection: local
vars:
instance_ids:
- i-1111
- i-2222
- i-3333
tasks:
- debug:
msg: "{{ instance_ids | json_query('[*].{Id: #, Port: `6443`}') }}"
Output:
TASK [debug]
ok: [localhost] => {
"msg": [
{
"Id": "i-1111",
"Port": 6443
},
{
"Id": "i-2222",
"Port": 6443
},
{
"Id": "i-3333",
"Port": 6443
}
]
}