Add self-check command

roles/matrix-server/tasks/self_check/self_check_riot_web.yml

@@ -0,0 +1,20 @@
+---
+
+- set_fact:
+    riot_web_url_endpoint_public: "https://{{ hostname_riot }}/config.json"
+
+- name: Check riot-web
+  uri:
+    url: "{{ riot_web_url_endpoint_public }}"
+    follow_redirects: false
+  register: result_riot_web
+  ignore_errors: true
+
+- name: Fail if riot-web not working
+  fail:
+    msg: "Failed checking riot-web is up at `{{ hostname_riot }}` (checked endpoint: `{{ riot_web_url_endpoint_public }}`). Is Riot running? Is port 443 open in your firewall? Full error: {{ result_riot_web }}"
+  when: "result_riot_web.failed or 'json' not in result_riot_web"
+
+- name: Report working riot-web
+  debug:
+    msg: "riot-web at `{{ hostname_riot }}` is working (checked endpoint: `{{ riot_web_url_endpoint_public }}`)"