initial commit. phase 1 complete

backend/config/celery.py

@@ -0,0 +1,62 @@
+"""
+Celery application for LabGraph.
+
+Referenced by docker-compose as: celery -A config.celery <subcommand>
+
+Queues:
+  discovery — Proxmox API polling, nmap network scans
+  heartbeat — Periodic ICMP/TCP liveness checks
+  default   — Maintenance, cleanup, housekeeping
+"""
+
+import os
+
+from celery import Celery
+from celery.schedules import crontab
+from kombu import Exchange, Queue
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings.development")
+
+app = Celery("labgraph")
+
+app.config_from_object("django.conf:settings", namespace="CELERY")
+
+app.autodiscover_tasks(["tasks"])
+
+# Explicit queue definitions (mirrors --queues flag in docker-compose worker command)
+app.conf.task_queues = (
+    Queue("default", Exchange("default"), routing_key="default"),
+    Queue("discovery", Exchange("discovery"), routing_key="discovery"),
+    Queue("heartbeat", Exchange("heartbeat"), routing_key="heartbeat"),
+)
+
+app.conf.task_default_queue = "default"
+app.conf.task_default_exchange = "default"
+app.conf.task_default_routing_key = "default"
+
+# Route tasks to queues by module prefix
+app.conf.task_routes = {
+    "tasks.discovery.*": {"queue": "discovery"},
+    "tasks.heartbeat.*": {"queue": "heartbeat"},
+    "tasks.maintenance.*": {"queue": "default"},
+}
+
+app.conf.beat_schedule = {
+    "heartbeat-all-nodes": {
+        "task": "tasks.heartbeat.check_all_nodes",
+        "schedule": 60.0,
+        "queue": "heartbeat",
+        # Drop task if not picked up before the next run fires
+        "options": {"expires": 55},
+    },
+    "discovery-scan-networks": {
+        "task": "tasks.discovery.scan_all_networks",
+        "schedule": crontab(minute="*/15"),
+        "queue": "discovery",
+    },
+    "maintenance-prune-heartbeat-logs": {
+        "task": "tasks.maintenance.prune_old_heartbeat_logs",
+        "schedule": crontab(hour=3, minute=0),
+        "queue": "default",
+    },
+}