---
- name: Simple Docker Swarm Analysis for ash3c
  hosts: ash3c
  become: yes
  gather_facts: yes
  
  tasks:
    # 基础检查
    - name: Check if Docker is installed
      command: which docker
      register: docker_installed
      failed_when: false
      changed_when: false
      
    - name: Fail if Docker not installed
      fail:
        msg: "Docker is not installed on {{ inventory_hostname }}"
      when: docker_installed.rc != 0
      
    # 检查当前 Swarm 状态
    - name: Check Docker Swarm status
      shell: docker info | grep "Swarm:" -A 1
      register: swarm_status
      
    - name: Display current Swarm status
      debug:
        msg: "🔍 Current Swarm Status: {{ swarm_status.stdout_lines }}"
        
    # 获取运行中的容器
    - name: Get running containers
      shell: docker ps --format "table {{ '{{' }}.Names{{ '}}' }}\t{{ '{{' }}.Image{{ '}}' }}\t{{ '{{' }}.Status{{ '}}' }}\t{{ '{{' }}.Ports{{ '}}' }}"
      register: running_containers
      
    - name: Display running containers
      debug:
        msg: "🏃 Running Containers: {{ running_containers.stdout_lines }}"
        
    # 获取所有容器（包括停止的）
    - name: Get all containers
      shell: docker ps -a --format "table {{ '{{' }}.Names{{ '}}' }}\t{{ '{{' }}.Image{{ '}}' }}\t{{ '{{' }}.Status{{ '}}' }}"
      register: all_containers
      
    - name: Display all containers
      debug:
        msg: "📦 All Containers: {{ all_containers.stdout_lines }}"
        
    # 检查每个容器的详细信息
    - name: Get container names only
      shell: docker ps -a --format "{{ '{{' }}.Names{{ '}}' }}"
      register: container_names
      
    - name: Inspect each container
      shell: |
        echo "=== Container: {{ item }} ==="
        echo "Image: $(docker inspect {{ item }} --format '{{ '{{' }}.Config.Image{{ '}}' }}')"
        echo "Status: $(docker inspect {{ item }} --format '{{ '{{' }}.State.Status{{ '}}' }}')"
        echo "Restart Policy: $(docker inspect {{ item }} --format '{{ '{{' }}.HostConfig.RestartPolicy.Name{{ '}}' }}')"
        echo "Network Mode: $(docker inspect {{ item }} --format '{{ '{{' }}.HostConfig.NetworkMode{{ '}}' }}')"
        echo "Published Ports: $(docker port {{ item }} 2>/dev/null || echo 'None')"
        echo "Volumes/Mounts:"
        docker inspect {{ item }} --format '{{ '{{' }}range .Mounts{{ '}}' }}  {{ '{{' }}.Source{{ '}}' }}:{{ '{{' }}.Destination{{ '}}' }} ({{ '{{' }}.Mode{{ '}}' }}){{ '{{' }}"\n"{{ '}}' }}{{ '{{' }}end{{ '}}' }}' || echo "  None"
        echo "Environment Variables:"
        docker inspect {{ item }} --format '{{ '{{' }}range .Config.Env{{ '}}' }}  {{ '{{' }}.{{ '}}' }}{{ '{{' }}"\n"{{ '}}' }}{{ '{{' }}end{{ '}}' }}' | head -10
        echo "Labels:"
        docker inspect {{ item }} --format '{{ '{{' }}range $key, $value := .Config.Labels{{ '}}' }}  {{ '{{' }}$key{{ '}}' }}={{ '{{' }}$value{{ '}}' }}{{ '{{' }}"\n"{{ '}}' }}{{ '{{' }}end{{ '}}' }}' | head -5
        echo "---"
      register: container_inspect
      loop: "{{ container_names.stdout_lines }}"
      when: container_names.stdout_lines | length > 0
      
    - name: Display container inspection results
      debug:
        msg: "{{ item.stdout }}"
      loop: "{{ container_inspect.results }}"
      when: container_inspect is defined
      
    # 检查 Docker Compose 文件
    - name: Find docker-compose files
      find:
        paths: 
          - /root
          - /home
          - /opt
        patterns: 
          - "docker-compose.yml"
          - "docker-compose.yaml"
          - "compose.yml"
          - "compose.yaml"
        recurse: yes
        depth: 3
      register: compose_files
      
    - name: Display found compose files
      debug:
        msg: "📄 Found compose files: {{ item.path }}"
      loop: "{{ compose_files.files }}"
      when: compose_files.files | length > 0
      
    # 分析网络配置
    - name: Get Docker networks
      shell: docker network ls
      register: docker_networks
      
    - name: Display Docker networks
      debug:
        msg: "🌐 Docker Networks: {{ docker_networks.stdout_lines }}"
        
    # 检查卷使用情况
    - name: Get Docker volumes
      shell: docker volume ls
      register: docker_volumes
      
    - name: Display Docker volumes
      debug:
        msg: "💾 Docker Volumes: {{ docker_volumes.stdout_lines }}"
        
    # 检查容器资源使用
    - name: Get container resource usage
      shell: docker stats --no-stream
      register: container_stats
      when: container_names.stdout_lines | length > 0
      
    - name: Display container stats
      debug:
        msg: "📊 Container Resource Usage: {{ container_stats.stdout_lines }}"
      when: container_stats is defined
      
    # 生成 Swarm 适用性分析
    - name: Generate Swarm suitability analysis
      debug:
        msg: |
          🔍 DOCKER SWARM MIGRATION ANALYSIS FOR {{ inventory_hostname }}
          ================================================================
          
          📋 SUMMARY:
          - Current Swarm Status: {{ 'Active' if 'active' in swarm_status.stdout else 'Inactive' }}
          - Total Containers: {{ container_names.stdout_lines | length }}
          - Running Containers: {{ (running_containers.stdout_lines | length) - 1 }}
          - Compose Files Found: {{ compose_files.files | length }}
          
          💡 GENERAL RECOMMENDATIONS:
          
          ✅ SUITABLE FOR SWARM (typically):
          - Web applications (nginx, apache, etc.)
          - API services
          - Databases (with proper volume management)
          - Monitoring tools (prometheus, grafana, etc.)
          - Load balancers
          
          ❌ NOT SUITABLE FOR SWARM:
          - Containers using Docker socket (/var/run/docker.sock)
          - Containers with --privileged flag
          - Containers requiring specific host access
          - Development/testing containers
          
          ⚠️  NEEDS MODIFICATION:
          - Containers using bind mounts (convert to volumes)
          - Containers without restart policies
          - Containers using host networking
          
          🚀 NEXT STEPS:
          1. Review each container's configuration above
          2. Identify services that can benefit from scaling
          3. Convert suitable containers to Docker services
          4. Set up overlay networks
          5. Configure secrets and configs management
          
          📝 MIGRATION CHECKLIST:
          □ Initialize Swarm (already done: {{ 'Yes' if 'active' in swarm_status.stdout else 'No' }})
          □ Create overlay networks
          □ Convert containers to services
          □ Set up service discovery
          □ Configure load balancing
          □ Test service scaling
          □ Set up monitoring
      when: container_names is defined
      
    # 保存分析结果
    - name: Save analysis summary
      copy:
        content: |
          Docker Swarm Analysis for {{ inventory_hostname }}
          Generated: {{ ansible_date_time.iso8601 }}
          
          Current Swarm Status: {{ swarm_status.stdout }}
          Total Containers: {{ container_names.stdout_lines | length }}
          
          Container List:
          {{ container_names.stdout_lines | join('\n') }}
          
          Networks:
          {{ docker_networks.stdout }}
          
          Volumes:
          {{ docker_volumes.stdout }}
          
          Compose Files Found:
          {% for file in compose_files.files %}
          - {{ file.path }}
          {% endfor %}
        dest: "/tmp/swarm-analysis-{{ inventory_hostname }}-{{ ansible_date_time.epoch }}.txt"
      
    - name: Analysis complete
      debug:
        msg: |
          🎉 Analysis complete! 
          Results saved to: /tmp/swarm-analysis-{{ inventory_hostname }}-{{ ansible_date_time.epoch }}.txt
          
          Review the container details above to determine which services
          are suitable for Swarm migration.