FusionAuth Sentry logback appender — sends WARN+ logs to Sentry. Obviously not the configuration we'd use in prod.

logback-sentry.patch

diff --git a/src/main/resources/logback.xml b/src/main/resources/logback.xml
index 66e559f76..caa03c3fc 100644
@@ -25,9 +25,17 @@
     </triggeringPolicy>
   </appender>
 
+  <!-- Sends WARN-and-above log events to Sentry. DSN and other config come from sentry.properties. -->
+  <appender name="Sentry" class="io.sentry.logback.SentryAppender">
+    <minimumEventLevel>WARN</minimumEventLevel>
+    <minimumBreadcrumbLevel>DEBUG</minimumBreadcrumbLevel>
+    <minimumLevel>DEBUG</minimumLevel>
+  </appender>
+
   <root level="INFO">
     <appender-ref ref="FILE"/>
     <appender-ref ref="STDOUT"/>
+    <appender-ref ref="Sentry"/>
   </root>
 
   <!-- Kafka has a lot of INFO logging which ends up being really noise -->

# src/main/config/dev/sentry.properties (new file)
dsn=https://540638b18cc55b6e725c1dc3a9287923@o4512052182384640.ingest.us.sentry.io/4512052644413440
environment=development
send-default-pii=true
logs.enabled=true
traces-sample-rate=1.0
profile-session-sample-rate=1.0
profile-lifecycle=trace

Obviously not the configuration we'd use in prod, but you could have this on preview branches for QA.