Make post-start delay for matrix-dendrite configurable

roles/custom/matrix-dendrite/defaults/main.yml

@@ -186,6 +186,15 @@ matrix_dendrite_systemd_wanted_services_list_default: ["docker.service"]
 matrix_dendrite_systemd_wanted_services_list_auto: []
 matrix_dendrite_systemd_wanted_services_list_custom: []
 
+# Controls how long to sleep for after starting the matrix-dendrite container.
+#
+# Delaying, so that the homeserver can manage to fully start and various services
+# that depend on it (`matrix_dendrite_systemd_required_services_list` and `matrix_dendrite_systemd_wanted_services_list`)
+# may only start after the homeserver is up and running.
+#
+# This can be set to 0 to remove the delay.
+matrix_dendrite_systemd_service_post_start_delay_seconds: 3
+
 # Specifies which template files to use when configuring Dendrite.
 # If you'd like to have your own different configuration, feel free to copy and paste
 # the original files into your inventory (e.g. in `inventory/host_vars/<host>/`)

roles/custom/matrix-dendrite/templates/systemd/matrix-dendrite.service.j2

@@ -63,9 +63,9 @@ ExecStartPre={{ devture_systemd_docker_base_host_command_docker }} network conne
 
 ExecStart={{ devture_systemd_docker_base_host_command_docker }} start --attach matrix-dendrite
 
-# Intentional delay, so that the homeserver can manage to start and various services
-# that depend on it (After/Requires) may only start after the homeserver is up and running.
-ExecStartPost=-{{ matrix_host_command_sleep }} 3
+{% if matrix_dendrite_systemd_service_post_start_delay_seconds != 0 %}
+ExecStartPost=-{{ matrix_host_command_sleep }} {{ matrix_dendrite_systemd_service_post_start_delay_seconds }}
+{% endif %}
 
 ExecStop=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} stop --time={{ devture_systemd_docker_base_container_stop_grace_time_seconds }} matrix-dendrite 2>/dev/null || true'
 ExecStop=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} rm matrix-dendrite 2>/dev/null || true'