---
# 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 %}
          
          ================================================================================