Loop over Ansible variable array in Jinja2 template to create nested dictionary - json

Question

Here is the output.
"result.containers":[
{
"Image":"ca.docker/webproxy:1.0.0",
"Names":[
"/customer1"
]
},
{
"Image":"docker.local/egacustomer:1.0.1",
"Names":[
"/webproxy"
]
}
]
I'm trying to create a nested dictionary using jinja2.
i'm trying to achieve the below using results.container and setfact.
"containerlist": "[webproxy:
name: customer1,
egacustomer:
name: webproxy]"
Here is my jinja2 code.
- set_fact:
containerlist: |
[
{% for item in result.containers %}
{{ item.Image | regex_replace('.*?/(.*?):.*', '\\1') }}:
'name': {{ item.Names | regex_replace("^/", "") }},
{% endfor %}
Which throws the error. Could someone help me with the right Jinja2 Code.Any help would be greatly appreciated
"containerlist": "[\n\\1:\n 'name': ['/customer'],\n\\1:\n 'name': ['/webproxy'],\n,\n]\n"

Answer 1

For what you're trying to do I would normalize use an Ansible looping task rather than trying to use a Jinja {% for ... %} loop. For example, these tasks...
- set_fact:
container_list: >-
{{
container_list + [{
item.Image.split('/')[-1].split(':')[0]:
item.Names[0][1:]
}]
}}
loop: "{{ result.containers }}"
vars:
container_list: []
- debug:
var: container_list
In the set_fact task, we're looping over result.containers, and for each iteration of the loop we redefine container_list as "the current contents of container_list + a new dictionary".
The above produces the following output:
TASK [set_fact] ****************************************************************
ok: [localhost] => (item={'Image': 'ca.docker/webproxy:1.0.0', 'Names': ['/customer1']})
ok: [localhost] => (item={'Image': 'docker.local/egacustomer:1.0.1', 'Names': ['/webproxy']})
TASK [debug] *******************************************************************
ok: [localhost] => {
"container_list": [
{
"webproxy": "customer1"
},
{
"egacustomer": "webproxy"
}
]
}