Optimized reset routine for docker images and specially discourse

roles/web-app-discourse/tasks/02_reset.yml

@@ -1,14 +1,45 @@
-- name: "Load database variables for reset function"
-  include_vars: "{{playbook_dir}}/roles/cmp-rdbms/vars/main.yml"
+# This reset function is redundant, because the 'sys-scv-docker' role reset will take care of it
+# anyhow lets keep this here for documentary purposes
 
-- name: "cleanup central database from {{ application_id }}_default network"
-  command:
-    cmd: "docker network disconnect {{applications | get_app_conf(application_id, 'network', True)}} {{ database_host }}"
-  ignore_errors: true
+- name: "Load database & docker-compose variables for reset"
+  ansible.builtin.include_vars:
+    file: "{{ item }}"
+  loop:
+    - "{{ playbook_dir }}/roles/docker-compose/vars/docker-compose.yml"
+    - "{{ playbook_dir }}/roles/cmp-rdbms/vars/database.yml"
 
-- name: "destroy container {{ DISCOURSE_CONTAINER }}"
-  command:
+- name: Sanity check for required vars
+  assert:
+    that:
+      - database_type is defined
+      - applications is defined
+      - docker_compose is defined
+      - ports is defined
+    fail_msg: "Load roles/docker-compose/vars/docker-compose.yml and set `database_type` first."
+
+- name: "Disconnect DB container from Discourse networks"
+  ansible.builtin.command:
+    cmd: "docker network disconnect {{ discourse_network_item }} {{ database_host }}"
+  loop:
+    - "{{ DISCOURSE_NETWORK }}"
+    - "{{ DISCOURSE_PG_NETWORK }}"
+  loop_control:
+    loop_var: discourse_network_item
+    label: "{{ discourse_network_item }}"
+  register: disc_net_disconnect
+  changed_when: disc_net_disconnect.rc == 0
+  failed_when: >
+    disc_net_disconnect.rc != 0 and
+    ('is not connected' not in (disc_net_disconnect.stderr | default('') | lower)) and
+    ('no such network' not in (disc_net_disconnect.stderr | default('') | lower)) and
+    ('no such container' not in (disc_net_disconnect.stderr | default('') | lower))
+
+- name: "destroy container '{{ DISCOURSE_CONTAINER }}'"
+  ansible.builtin.command:
     cmd: "./launcher destroy {{ DISCOURSE_CONTAINER }}"
     chdir: "{{ DISCOURSE_REPOSITORY_DIR }}"
-  ignore_errors: true
-  notify: recreate discourse
+  register: discourse_destroy
+  changed_when: discourse_destroy.rc == 0
+  failed_when: >
+    discourse_destroy.rc != 0 and
+    ('unable to change directory before execution' not in (discourse_destroy.msg | default('') | lower))