Remove some hardcoded matrix-postgres references

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

@@ -138,7 +138,7 @@ matrix_dendrite_metrics_password: "metrics"
 
 # Postgres database information
 matrix_dendrite_database_str: "postgresql://{{ matrix_dendrite_database_user }}:{{ matrix_dendrite_database_password }}@{{ matrix_dendrite_database_hostname }}"
-matrix_dendrite_database_hostname: "matrix-postgres"
+matrix_dendrite_database_hostname: ''
 matrix_dendrite_database_user: "dendrite"
 matrix_dendrite_database_password: "itsasecret"
 matrix_dendrite_federationapi_database: "dendrite_federationapi"

roles/custom/matrix-dendrite/tasks/validate_config.yml

@@ -5,7 +5,8 @@
       You need to define a required configuration setting (`{{ item }}`) for using Dendrite.
   when: "vars[item] == ''"
   with_items:
-    - "matrix_dendrite_client_api_registration_shared_secret"
+    - matrix_dendrite_client_api_registration_shared_secret
+    - matrix_dendrite_database_hostname
 
 - name: (Deprecation) Catch and report renamed settings
   ansible.builtin.fail:

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

@@ -16,8 +16,8 @@ Environment="HOME={{ devture_systemd_docker_base_systemd_unit_home_path }}"
 ExecStartPre=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} kill matrix-dendrite 2>/dev/null || true'
 ExecStartPre=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} rm matrix-dendrite 2>/dev/null || true'
 
-{% if 'matrix-postgres.service' in matrix_dendrite_systemd_required_services_list %}
-# Dendrite is too quick to start in relation to its matrix-postgres dependency.
+{% if (devture_postgres_identifier + '.service') in matrix_dendrite_systemd_required_services_list %}
+# Dendrite is too quick to start in relation to its Postgres dependency.
 # Delay Dendrite startup to avoid failing with: "failed to connect to accounts db" ("pq: the database system is starting up").
 ExecStartPre={{ matrix_host_command_sleep }} 5
 {% endif %}