computer-playbook/roles/sys-stk-front-proxy/tasks/main.yml

---
# nocheck: run-once

- name: 🧊 Freeze front proxy context before nested role loads
  ansible.builtin.set_fact:
    front_proxy_application_id: "{{ application_id }}"
    front_proxy_domain: "{{ domain | default(lookup('domain', application_id)) }}"
    front_proxy_service_key: >-
      {{
        webserver_proxy_service_key
        | default(
            lookup('config', application_id,
              'services.' ~ (application_id | get_entity_name) ~ '.proxy.service_key',
              application_id | get_entity_name
            )
          )
      }}
    front_proxy_http_port: >-
      {{
        http_port
        | default(
            lookup('config', application_id,
              'services.' ~ (application_id | get_entity_name) ~ '.ports.local.http',
              ''
            )
          )
      }}
    front_proxy_internal_port: >-
      {{
        proxy_internal_port
        | default(
            lookup('config', application_id,
              'services.' ~ (application_id | get_entity_name) ~ '.proxy.internal_port',
              ''
            )
          )
      }}
    front_proxy_domain_conf_dst_resolved: >-
      {{
        lookup(
          'nginx',
          'files.domain',
          (domain | default(lookup('domain', application_id)))
        )
      }}
  changed_when: false

- name: 🧊 Freeze the probe target for this vhost
  ansible.builtin.set_fact:
    front_proxy_probe_url: "{{ lookup('tls', front_proxy_domain, 'url.base') }}"
    front_proxy_status_codes: "{{ lookup('applications') | accepted_status_codes(front_proxy_application_id, lookup('tls', front_proxy_domain, 'domain')) }}"
  changed_when: false

- name: 📂 Include dependencies
  include_role:
    name: "sys-svc-nss"
  when: not (run_once_sys_svc_nss | default(false) | bool)

- name: 🥾 Bootstrap Frontend Base
  ansible.builtin.include_role:
    name: sys-stk-front-base

- name: "📌 TLS | Apply tls layer"
  include_role:
    name: sys-front-tls
  when: lookup('tls', front_proxy_application_id, 'enabled') | bool
  vars:
    application_id: "{{ front_proxy_application_id }}"
    domain: "{{ front_proxy_domain }}"

- name: "📌 CSP/INJ | Apply global injections for {{ front_proxy_domain }}"
  ansible.builtin.include_role:
    name: sys-front-inj-all
  vars:
    application_id: "{{ front_proxy_application_id }}"
    domain: "{{ front_proxy_domain }}"

- name: 🔍 Resolve application-specific front proxy template path
  ansible.builtin.set_fact:
    front_proxy_application_template: "{{ front_proxy_application_id | abs_role_path_by_application_id }}/templates/proxy.conf.j2"

- name: 🔍 Resolve front proxy template source
  ansible.builtin.set_fact:
    front_proxy_template_src: >-
      {{
        front_proxy_application_template
        if (
          lookup('fileglob', front_proxy_application_template, wantlist=True) | length
        ) > 0
        else "roles/sys-svc-proxy/templates/vhost/%s.conf.j2" | format(webserver_vhost_flavour)
      }}
  vars:
    webserver_vhost_flavour: basic

- name: "🚀 Deploy NGINX config for '{{ front_proxy_domain }}'"
  stack_host_template:
    src: "{{ front_proxy_template_src }}"
    dest: "{{ front_proxy_domain_conf_dst_resolved }}"
  vars:
    application_id: "{{ front_proxy_application_id }}"
    domain: "{{ front_proxy_domain }}"
    http_port: "{{ front_proxy_http_port }}"
    proxy_service_key: "{{ front_proxy_service_key }}"
    proxy_internal_port: "{{ front_proxy_internal_port }}"
    webserver_extra_configuration: ""
    webserver_websocket_location: ""
    webserver_client_max_body_size: "{{ lookup('config', front_proxy_application_id, 'server.client_max_body_size', '100m') }}"
  register: nginx_conf
  notify: reload-openresty

- block:
    - name: "🔍 Check if '{{ front_proxy_domain }}' is reachable"
      uri_probe:
        url: "{{ front_proxy_probe_url }}"
        status_code: "{{ front_proxy_status_codes }}"
      register: site_check
      failed_when: false
      changed_when: false

    - name: "🔄 Redeploy: site answered {{ site_check.status | default('none') }}"
      ansible.builtin.command:
        cmd: "true"
      notify: restart-openresty
      when:
        - site_check.status | default(-1) not in front_proxy_status_codes
        - site_check.status | default(-1) in front_proxy_stale_config_status_codes
  when: not nginx_conf.changed

- name: "🔄 Restart Webserver for '{{ front_proxy_domain_conf_dst_resolved }}'"
  ansible.builtin.meta: flush_handlers

- name: "🔍 Verify '{{ front_proxy_domain }}' is served after the reload"
  uri_probe:
    url: "{{ front_proxy_probe_url }}"
    status_code: "{{ front_proxy_status_codes }}"
  register: front_proxy_reload_check
  failed_when: false
  changed_when: false
  when: nginx_conf.changed

- name: "🔄 Redeploy: reload left {{ front_proxy_reload_check.status | default('none') }}"
  ansible.builtin.command:
    cmd: "true"
  notify: restart-openresty
  when:
    - nginx_conf.changed
    - front_proxy_reload_check.status | default(-1) not in front_proxy_status_codes
    - >-
      not openresty_reload.changed
      or front_proxy_reload_check.status | default(-1) in front_proxy_stale_config_status_codes

- name: "🔄 Flush the fallback redeploy for '{{ front_proxy_domain }}'"
  ansible.builtin.meta: flush_handlers
  when: nginx_conf.changed