init

monitoring/management/commands/doctor.py

@@ -0,0 +1,35 @@
+"""Check configured infrastructure without changing production data."""
+import json,uuid
+from django.core.management.base import BaseCommand,CommandError
+from django.db import connection
+from django.db.migrations.executor import MigrationExecutor
+from django.core.cache import cache
+from config.celery import app
+
+class Command(BaseCommand):
+    help='Prüft Datenbank, Migrationen, Redis, Broker und optional Worker.'
+    def add_arguments(self,p):p.add_argument('--workers',action='store_true')
+    def handle(self,*args,**options):
+        results={}
+        try:
+            with connection.cursor() as c:c.execute('SELECT 1');c.fetchone()
+            results['database']=connection.vendor
+            executor=MigrationExecutor(connection)
+            pending=executor.migration_plan(executor.loader.graph.leaf_nodes())
+            results['migrations']='pending' if pending else 'ok'
+        except Exception as e:results['database']='ERROR '+type(e).__name__
+        try:
+            key='doctor:'+str(uuid.uuid4());cache.set(key,'ok',30)
+            results['cache']='ok' if cache.get(key)=='ok' else 'ERROR readback'
+            cache.delete(key)
+        except Exception as e:results['cache']='ERROR '+type(e).__name__
+        try:
+            with app.connection_for_read() as conn:conn.ensure_connection(max_retries=0,timeout=5)
+            results['broker']='ok'
+        except Exception as e:results['broker']='ERROR '+type(e).__name__
+        if options['workers']:
+            try:results['workers']='ok' if app.control.ping(timeout=3) else 'ERROR no response'
+            except Exception as e:results['workers']='ERROR '+type(e).__name__
+        self.stdout.write(json.dumps(results,indent=2))
+        if any(v.startswith('ERROR') or v=='pending' for v in results.values()):
+            raise CommandError('Infrastrukturprüfung fehlgeschlagen; keine Zugangsdaten werden ausgegeben.')