server: add healthcheck for worker

server/reflector/worker/app.py

@@ -1,6 +1,8 @@
+import structlog
 from celery import Celery
 from reflector.settings import settings
 
+logger = structlog.get_logger(__name__)
 app = Celery(__name__)
 app.conf.broker_url = settings.CELERY_BROKER_URL
 app.conf.result_backend = settings.CELERY_RESULT_BACKEND
@@ -8,5 +10,18 @@ app.conf.broker_connection_retry_on_startup = True
 app.autodiscover_tasks(
     [
         "reflector.pipelines.main_live_pipeline",
+        "reflector.worker.healthcheck",
     ]
 )
+
+# crontab
+app.conf.beat_schedule = {}
+
+if settings.HEALTHCHECK_URL:
+    app.conf.beat_schedule["healthcheck_ping"] = {
+        "task": "reflector.worker.healthcheck.healthcheck_ping",
+        "schedule": 60.0 * 10,
+    }
+    logger.info("Healthcheck enabled", url=settings.HEALTHCHECK_URL)
+else:
+    logger.warning("Healthcheck disabled, no url configured")