fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

deployment/ansible/playbooks/monitor-traefik-restarts.yml

@@ -0,0 +1,150 @@
+---
+# Monitor Traefik for Unexpected Restarts
+# Überwacht Traefik-Logs auf "I have to go..." Meldungen und identifiziert die Ursache
+- name: Monitor Traefik Restarts
+  hosts: production
+  gather_facts: yes
+  become: no
+
+  vars:
+    monitor_lookback_hours: "{{ monitor_lookback_hours | default(24) }}"
+
+  tasks:
+    - name: Check Traefik logs for "I have to go..." messages
+      ansible.builtin.shell: |
+        cd /home/deploy/deployment/stacks/traefik
+        docker compose logs traefik --since {{ monitor_lookback_hours }}h 2>&1 | grep -E "I have to go|Stopping server gracefully" | tail -20 || echo "No stop messages found"
+      register: traefik_stop_messages
+      changed_when: false
+
+    - name: Display Traefik stop messages
+      ansible.builtin.debug:
+        msg: |
+          ================================================================================
+          Traefik Stop-Meldungen (letzte {{ monitor_lookback_hours }} Stunden):
+          ================================================================================
+          {{ traefik_stop_messages.stdout }}
+          ================================================================================
+
+    - name: Check Traefik container restart count
+      ansible.builtin.shell: |
+        docker inspect traefik --format '{{ '{{' }}.RestartCount{{ '}}' }}' 2>/dev/null || echo "0"
+      register: traefik_restart_count
+      changed_when: false
+
+    - name: Check Traefik container start time
+      ansible.builtin.shell: |
+        docker inspect traefik --format '{{ '{{' }}.State.StartedAt{{ '}}' }}' 2>/dev/null || echo "UNKNOWN"
+      register: traefik_started_at
+      changed_when: false
+
+    - name: Check Docker events for Traefik stops
+      ansible.builtin.shell: |
+        timeout 5 docker events --since {{ monitor_lookback_hours }}h --filter container=traefik --filter event=die --format "{{ '{{' }}.Time{{ '}}' }} {{ '{{' }}.Action{{ '}}' }} {{ '{{' }}.Actor.Attributes.name{{ '}}' }}" 2>/dev/null | tail -20 || echo "No stop events found or docker events not available"
+      register: traefik_stop_events
+      changed_when: false
+
+    - name: Display Traefik stop events
+      ansible.builtin.debug:
+        msg: |
+          ================================================================================
+          Docker Stop-Events für Traefik (letzte {{ monitor_lookback_hours }} Stunden):
+          ================================================================================
+          {{ traefik_stop_events.stdout }}
+          ================================================================================
+
+    - name: Check for manual docker compose commands in history
+      ansible.builtin.shell: |
+        history | grep -E "docker.*compose.*traefik.*(restart|stop|down|up)" | tail -10 || echo "No manual docker compose commands found in history"
+      register: manual_commands
+      changed_when: false
+      failed_when: false
+
+    - name: Display manual docker compose commands
+      ansible.builtin.debug:
+        msg: |
+          ================================================================================
+          Manuelle Docker Compose Befehle (aus History):
+          ================================================================================
+          {{ manual_commands.stdout }}
+          ================================================================================
+
+    - name: Check systemd docker service status
+      ansible.builtin.shell: |
+        systemctl status docker.service --no-pager -l | head -20 || echo "Could not check docker service status"
+      register: docker_service_status
+      changed_when: false
+      failed_when: false
+
+    - name: Display Docker service status
+      ansible.builtin.debug:
+        msg: |
+          ================================================================================
+          Docker Service Status:
+          ================================================================================
+          {{ docker_service_status.stdout }}
+          ================================================================================
+
+    - name: Check for system reboots
+      ansible.builtin.shell: |
+        last reboot --since "{{ monitor_lookback_hours }} hours ago" 2>/dev/null | head -5 || echo "No reboots in the last {{ monitor_lookback_hours }} hours"
+      register: reboots
+      changed_when: false
+      failed_when: false
+
+    - name: Display reboot history
+      ansible.builtin.debug:
+        msg: |
+          ================================================================================
+          System Reboots (letzte {{ monitor_lookback_hours }} Stunden):
+          ================================================================================
+          {{ reboots.stdout }}
+          ================================================================================
+
+    - name: Analyze stop message timestamps
+      ansible.builtin.set_fact:
+        stop_timestamps: "{{ traefik_stop_messages.stdout | regex_findall('\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}') }}"
+
+    - name: Count stop messages
+      ansible.builtin.set_fact:
+        stop_count: "{{ stop_timestamps | length | int }}"
+
+    - name: Summary
+      ansible.builtin.debug:
+        msg: |
+          ================================================================================
+          ZUSAMMENFASSUNG - Traefik Restart Monitoring:
+          ================================================================================
+          
+          Überwachungszeitraum: Letzte {{ monitor_lookback_hours }} Stunden
+          
+          Traefik Status:
+          - Restart Count: {{ traefik_restart_count.stdout }}
+          - Gestartet um: {{ traefik_started_at.stdout }}
+          - Stop-Meldungen gefunden: {{ stop_count | default(0) }}
+          
+          {% if (stop_count | default(0) | int) > 0 %}
+          ⚠️  {{ stop_count }} Stop-Meldungen gefunden:
+          {{ traefik_stop_messages.stdout }}
+          
+          Mögliche Ursachen:
+          {% if reboots.stdout and 'No reboots' not in reboots.stdout %}
+          1. System-Reboots: {{ reboots.stdout }}
+          {% endif %}
+          {% if traefik_stop_events.stdout and 'No stop events' not in traefik_stop_events.stdout %}
+          2. Docker Stop-Events: {{ traefik_stop_events.stdout }}
+          {% endif %}
+          {% if manual_commands.stdout and 'No manual' not in manual_commands.stdout %}
+          3. Manuelle Befehle: {{ manual_commands.stdout }}
+          {% endif %}
+          
+          Nächste Schritte:
+          - Prüfe ob die Stop-Meldungen mit unseren manuellen Restarts übereinstimmen
+          - Prüfe ob System-Reboots die Ursache sind
+          - Prüfe Docker-Service-Logs für automatische Stops
+          {% else %}
+          ✅ Keine Stop-Meldungen in den letzten {{ monitor_lookback_hours }} Stunden
+          Traefik läuft stabil!
+          {% endif %}
+          
+          ================================================================================