Transform data with Ansible / templating

ansible_task.yaml

---

- include_vars:
    file: "{{ item }}"
    name: "__content__"
  with_fileglob:
  - "/resources/*.yaml"
  register: script_files_read
  
- set_fact:
    script_files: "{{ buffer | from_json }}"
  vars:
    buffer: "{ {% for r in script_files_read.results %}\"{{ r.item | basename | splitext | first }}\" : {{ r.ansible_facts.__content__ | to_json | to_json }}{% if not loop.last %},{% endif %}{% endfor %} }"
    
- name: Another example, with YAML
  vars:
    buffer: |+
      ---
      {% for file in (query('fileglob', '/resources/*.yaml', wantlist=True) | sort) %}
      {% set r = lookup('template', file) | from_yaml %}
      - {{ r | combine({"spec" : r.spec | to_json }) | to_yaml | indent(2) }}
      {% endfor %}
  set_fact:
    script_files_data: "{{ buffer | from_yaml }}"
  tags:
    - always

ansible_task_2.yaml

- vars:
    rules:
    - port: 9091 # push gateway
      labels: {  app: prometheus-pushgateway }
    - port: 9093 # alert manager
      labels: {  app: alertmanager }
    - port: 9108 # elasticsearch exporter
      labels: { app: prometheus-elasticsearch-exporter }
    - port: 9108 # logstash exporter
      labels: { app: prometheus-logstash-exporter }
    - port: 9304 # logstash exporter
      labels: { app: prometheus-logstash-exporter }
    - port: 3000 # grafana
      labels: { app.kubernetes.io/name: grafana }
    - port: 15692 # rabbitmq
      labels: { app.kubernetes.io/component: rabbitmq }
    buffer: |
      ---
      {% for rule in rules %}
      - ports:
        - port: {{ rule.port }}
          protocol: TCP
        selectors:
        - podSelector:
            matchLabels:
              {{ rule.labels | to_yaml | indent(6) }}
      {% endfor %}
  set_fact:
    scrap_egress_rules: "{{ buffer | from_yaml }}"