--- - name: Docker Swarm Check 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 - 使用简单格式 - name: Get running containers shell: docker ps register: running_containers - name: Display running containers debug: msg: "🏃 Running Containers:\n{{ running_containers.stdout }}" # 获取所有容器（包括停止的） - name: Get all containers shell: docker ps -a register: all_containers - name: Display all containers debug: msg: "📦 All Containers:\n{{ all_containers.stdout }}" # 获取容器名称列表 - name: Get container names shell: docker ps -a | awk 'NR>1 {print $NF}' | head -20 register: container_names - name: Display container names debug: msg: "Container names: {{ container_names.stdout_lines }}" # 检查每个容器的基本信息 - name: Get basic container info shell: | echo "=== Container: {{ item }} ===" docker inspect {{ item }} | jq -r '.[0] | { "Image": .Config.Image, "Status": .State.Status, "RestartPolicy": .HostConfig.RestartPolicy.Name, "NetworkMode": .HostConfig.NetworkMode }' echo "Ports:" docker port {{ item }} 2>/dev/null || echo "No published ports" echo "Mounts:" docker inspect {{ item }} | jq -r '.[0].Mounts[]? | " \(.Source):\(.Destination) (\(.Mode))"' echo "---" register: container_info loop: "{{ container_names.stdout_lines[:10] }}" # 限制前10个容器 when: container_names.stdout_lines | length > 0 - name: Display container info debug: msg: "{{ item.stdout }}" loop: "{{ container_info.results }}" when: container_info is defined # 检查 Docker Compose 文件 - name: Find docker-compose files in common locations find: paths: - /root - /home - /opt - /var/lib/docker patterns: - "docker-compose.yml" - "docker-compose.yaml" - "compose.yml" - "compose.yaml" recurse: yes depth: 3 register: compose_files ignore_errors: yes - name: Display found compose files debug: msg: "📄 Found compose files: {{ compose_files.files | map(attribute='path') | list }}" 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:\n{{ docker_networks.stdout }}" # 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:\n{{ docker_volumes.stdout }}" # 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:\n{{ container_stats.stdout }}" when: container_stats is defined # 检查 Docker 镜像 - name: Get Docker images shell: docker images register: docker_images - name: Display Docker images debug: msg: "🖼️ Docker Images:\n{{ docker_images.stdout }}" # 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 if compose_files.files is defined else 0 }} 💡 SWARM MIGRATION RECOMMENDATIONS: ✅ TYPICALLY SUITABLE FOR SWARM: - Web servers (nginx, apache, caddy) - API services and microservices - Application servers - Load balancers (traefik, haproxy) - Monitoring tools (prometheus, grafana) - Databases (with proper volume strategy) ❌ NOT SUITABLE FOR SWARM: - Containers using Docker socket (/var/run/docker.sock) - Containers with --privileged flag - Development/testing containers - Containers requiring specific host hardware access ⚠️ NEEDS MODIFICATION FOR SWARM: - Containers using bind mounts → convert to volumes - Containers without restart policies → add restart policies - Containers using host networking → use overlay networks - Containers with hardcoded IPs → use service discovery 🚀 MIGRATION STEPS: 1. ✅ Swarm is already initialized 2. Create overlay networks for service communication 3. Convert suitable containers to Docker services 4. Set up service discovery and load balancing 5. Configure secrets and configs management 6. Test service scaling and failover 📝 NEXT ACTIONS: - Review each container above for Swarm suitability - Identify services that would benefit from scaling - Plan network topology for services - Prepare volume migration strategy when: container_names is defined # 保存分析结果 - name: Save analysis summary to file copy: content: | Docker Swarm Analysis for {{ inventory_hostname }} Generated: {{ ansible_date_time.iso8601 }} SWARM STATUS: {{ swarm_status.stdout }} CONTAINERS ({{ container_names.stdout_lines | length }} total): {{ container_names.stdout_lines | join('\n') }} NETWORKS: {{ docker_networks.stdout }} VOLUMES: {{ docker_volumes.stdout }} IMAGES: {{ docker_images.stdout }} {% if compose_files.files is defined and compose_files.files | length > 0 %} COMPOSE FILES FOUND: {% for file in compose_files.files %} - {{ file.path }} {% endfor %} {% endif %} 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 identify: - Which services are suitable for Swarm - Which containers need modification - Migration priority and strategy 💡 TIP: Focus on stateless services first for easier migration!