[infra] feat: notify Discord role when URLs check fails (#1824)

infra/ansible/inventory.yml

@@ -104,6 +104,10 @@ all:
             - https://api.tournesol.app/admin
             - https://webanalytics.tournesol.app/login
 
+          # ID of the Discord role that will be highlighted when a monitored
+          # URL is unreachable. (optional)
+          discord_role_id_urls_checks: 928020834885464086
+
           grafana_domain_name: "grafana.{{domain_name}}"
           grafana_scheme: https
           plausible_hosting_tag: "2023.09.28"
@@ -170,6 +174,10 @@ all:
             - https://api.staging.tournesol.app/admin
             - https://webanalytics.staging.tournesol.app/login
 
+          # ID of the Discord role that will be highlighted when a monitored
+          # URL is unreachable. (optional)
+          discord_role_id_urls_checks: 928020834885464086
+
           grafana_domain_name: "grafana.{{domain_name}}"
           grafana_scheme: https
           plausible_hosting_tag: "2023.09.28"

infra/ansible/roles/monitoring/templates/external-urls-monitoring.sh.j2

@@ -9,7 +9,11 @@ do
         echo "error checking $u"
 {% if discord_infra_alert_webhook is defined and discord_infra_alert_webhook != "" %}
         wget -qO /dev/null \
-        --post-data='{"content": "health check of '"$u"' failed"}' \
+    {% if discord_role_id_urls_checks is defined and discord_role_id_urls_checks %}
+        --post-data='{"content": "🚨 <@&{{discord_role_id_urls_checks}}> - health check of '"$u"' failed"}' \
+    {% else %}
+        --post-data='{"content": "🚨 health check of '"$u"' failed"}' \
+    {% endif %}
         --header='Content-Type:application/json' \
         '{{discord_infra_alert_webhook}}?wait=true'
         echo "alert sent"