test: CI/CD pipeline staging test - Redis aktiviert, Bad Gateway dokumentiert

deployment/stacks/gitea/README.md

@@ -411,17 +411,54 @@ docker compose logs redis
 
 ### Performance Issues
 
-```bash
-# Check MySQL slow queries
-docker exec gitea-mysql tail -100 /var/log/mysql/slow-queries.log
+**If Gitea has frequent outages or connection issues:**
 
-# Analyze MySQL performance
-docker exec gitea-mysql mysql -u root -p$MYSQL_ROOT_PASSWORD \
-  -e "SHOW PROCESSLIST;"
+1. **Update Gitea Configuration** (Recommended):
+   ```bash
+   cd deployment/ansible
+   ansible-playbook -i inventory/production.yml \
+     playbooks/update-gitea-config.yml \
+     --vault-password-file secrets/.vault_pass
+   ```
+   
+   This playbook will:
+   - Enable Redis cache for better performance and persistence
+   - Configure database connection pooling
+   - Set connection limits to prevent "Connection reset by peer" errors
 
-# Check Redis memory usage
-docker exec gitea-redis redis-cli -a $REDIS_PASSWORD INFO memory
-```
+2. **Manual Troubleshooting**:
+   ```bash
+   # Check PostgreSQL slow queries
+   docker exec gitea-postgres psql -U gitea -d gitea -c "SELECT * FROM pg_stat_activity;"
+   
+   # Check container resource usage
+   docker stats gitea gitea-postgres gitea-redis
+   
+   # Check Gitea logs for errors
+   docker compose logs --tail 100 gitea | grep -i error
+   
+   # Check Redis connection
+   docker exec gitea-redis redis-cli -a $REDIS_PASSWORD ping
+   ```
+
+### Known Issues
+
+**Bad Gateway after many rapid requests (15-20 reloads):**
+- **Status**: Known issue, non-critical
+- **Symptoms**: Gitea returns "Bad Gateway" after 15-20 rapid page reloads, recovers after a few seconds
+- **Impact**: Low - Gitea is functional for normal usage
+- **Possible causes**:
+  - Container restart during high load
+  - Connection pool exhaustion (mitigated with increased limits)
+  - Traefik service discovery delay in host network mode
+- **Workarounds**:
+  - Wait a few seconds and retry
+  - Use Redis cache (already enabled) for better performance
+  - Consider adding rate limiting if needed (see Traefik middlewares)
+- **Future improvements**:
+  - Monitor and optimize connection pool usage
+  - Consider adding rate limiting middleware for Gitea
+  - Investigate Traefik service discovery in host network mode
 
 ### Reset Admin Password