在ECS任务定义中指定强制重新拉取镜像。

代码示例：

在任务定义的JSON文件中添加以下字段：

"containerDefinitions": [
  {
    "name": "my-container",
    "image": "my-docker-image:latest",
    "essential": true,
    "portMappings": [
      {
        "containerPort": 80,
        "hostPort": 80
      }
    ],
    "logConfiguration": {
      "logDriver": "awslogs",
      "options": {
        "awslogs-region": "",
        "awslogs-group": "my-log-group",
        "awslogs-stream-prefix": "my-stream-prefix"
      }
    },
    "dockerLabels": {
      "com.amazonaws.ecs.update-strategy": "rolling",
      "com.amazonaws.ecs.image-update-override": "recreate"
    }
  }
]

其中的"com.amazonaws.ecs.image-update-override": "recreate"表示强制在每次更新任务时重新拉取镜像。