imageName="$project:$tag"
    imageName1="$harbor1/$imageName"
    docker pull $imageName1
    if [ $? -eq 0 ]; then
      echo "$imageName1下载正常"
    else
      harbor1="dockerproxy.com"
      imageName1="$harbor1/$imageName"
      echo "开始下载$imageName1"
      docker pull $imageName1
      if [ $? -eq 0 ]; then
        echo "$imageName1下载正常"
      else
        harbor1="docker.nju.edu.cn"
        imageName1="$harbor1/$imageName"
        echo "开始下载$imageName1"
        docker pull $imageName1
        if [ $? -eq 0 ]; then
          echo "$imageName1下载正常"
        else
          echo "$imageName1下载不正常，且已经没有多余的镜像站点了。退出。"
          exit
        fi
      fi
    fi

harbor1List=("docker.io" "dockerproxy.com" "docker.nju.edu.cn")

    for harbor1 in "${harbor1List[@]}"; do
      imageName="$project:$tag"
      imageName1="$harbor1/$imageName"
      echo "开始下载$imageName1"
      docker pull "$imageName1"
      if [ $? -eq 0 ]; then
        echo "下载$imageName1正常"
        break
      else
        echo "下载$imageName1异常"
      fi
    done