Add native Traefik support to matrix-prometheus-nginxlog-exporter

roles/custom/matrix-prometheus-nginxlog-exporter/tasks/validate_config.yml

@@ -1,5 +1,14 @@
 ---
 
+- name: (Deprecation) Catch and report renamed prometheus-nginxlog-exporter settings
+  ansible.builtin.fail:
+    msg: >-
+      Your configuration contains a variable, which now has a different name.
+      Please change your configuration to rename the variable (`{{ item.old }}` -> `{{ item.new }}`).
+  when: "item.old in vars"
+  with_items:
+    - {'old': 'matrix_prometheus_nginxlog_exporter_container_hostname', 'new': 'matrix_prometheus_nginxlog_exporter_identifier'}
+
 - name: Fail if docker image not availble for arch
   ansible.builtin.fail:
     msg: >
@@ -16,3 +25,13 @@
 
       in vars.yml
   when: matrix_prometheus_nginxlog_exporter_docker_image_arch_check_enabled and matrix_architecture not in matrix_prometheus_nginxlog_exporter_docker_image_arch
+
+- name: Fail if required prometheus-nginxlog-exporter settings not defined
+  ansible.builtin.fail:
+    msg: >-
+      You need to define a required configuration setting (`{{ item.name }}`).
+  when: "item.when | bool and vars[item.name] == ''"
+  with_items:
+    - {'name': 'matrix_prometheus_nginxlog_exporter_metrics_proxying_hostname', when: "{{ matrix_prometheus_nginxlog_exporter_metrics_proxying_enabled }}"}
+    - {'name': 'matrix_prometheus_nginxlog_exporter_metrics_proxying_path_prefix', when: "{{ matrix_prometheus_nginxlog_exporter_metrics_proxying_enabled }}"}
+    - {'name': 'matrix_prometheus_nginxlog_exporter_container_network', when: true}