image_handling.yml

---
- name: 載入 required_images.txt 內容
  slurp:
    src: "{{ offline_dir }}/required_images.txt"
  register: images_content
  delegate_to: localhost # 在 Ansible 控制機上執行

- name: 轉換 images_content 為列表
  set_fact:
    image_list: "{{ images_content.content | b64decode | split('\n') | reject('equalto', '') | list }}"

- name: 處理每個鏡像 (拉取, 標記, 清理)
  shell: |
    IMAGE="{{ item }}"
    ACCELERATOR_PREFIX="{{ k8s_accelerator }}"
    
    if echo "$IMAGE" | grep -q "registry.k8s.io"; then
        # K8s 核心鏡像：使用加速器並重新標記
        if echo "$IMAGE" | grep -q "coredns"; then
          ACCELERATED_IMAGE="${ACCELERATOR_PREFIX}/coredns:v1.12.1"
        else
          ACCELERATED_IMAGE=$(echo $IMAGE | sed "s|registry.k8s.io|${ACCELERATOR_PREFIX}|g")
        fi
        
        docker pull "$ACCELERATED_IMAGE"
        docker tag "$ACCELERATED_IMAGE" "$IMAGE"
        docker rmi "$ACCELERATED_IMAGE"
    elif echo "$IMAGE" | grep -q "docker.io"; then
        # Calico CNI 鏡像：直接拉取
        docker pull "$IMAGE"
    fi
  loop: "{{ image_list }}"
  register: image_pull_results

- name: 將所有鏡像打包成 tar
  shell: "docker save $(cat {{ offline_dir }}/required_images.txt) -o {{ offline_dir }}/k8s_calico_images_{{ k8s_version }}.tar.gz"

- name: 報告鏡像處理結果
  debug:
    msg: "鏡像打包完成。"