service: Option to not pass host header to container service

roles/service/defaults/main.yaml

@@ -1,6 +1,7 @@
 ---
 service_domains: []
 service_vhost_locations: []
+service_proxy_pass_host_header: true
 
 service_container_additional_networks: []
 service_container_user: ""

roles/service/meta/argument_specs.yaml

@@ -20,8 +20,14 @@ argument_specs:
           - Required if service_domains is not empty.
         type: int
         required: false
+      service_proxy_pass_host_header:
+        description: Passed to vhost role as vhost_proxy_pass_header
+        type: bool
+        required: false
+        default: true
       service_vhost_locations:
         description: Passed to vhost role as vhost_locations
+        type: list
         required: false
         default: []
 

roles/service/tasks/proxy.yaml

@@ -33,4 +33,5 @@
     vhost_domains: "{{ service_domains }}"
     vhost_proxy_target_netproto: unix
     vhost_proxy_target_socket: "/run/{{ service_name }}-socat.sock"
+    vhost_proxy_headers: "{{ _service_proxy_headers }}"
     vhost_locations: "{{ service_vhost_locations }}"

roles/service/vars/main.yaml

@@ -19,3 +19,7 @@ _service_container_secrets: >
 
 _service_container_requires: "{{ service_requires + ([_service_database_name + '.service'] if _service_setup_database else []) }}"
 _service_container_wants: "{{ service_wants + ([service_name + '-socat.socket'] if service_domains | length > 0 else []) }}"
+
+_service_replacement_host_header:
+  Host: "{{ service_name }}:{{ service_container_http_port }}"
+_service_proxy_headers: "{{ _service_replacement_host_header if not service_proxy_pass_host_header else {} }}"