如何在aws_ecs_task_definition平台aws中运行cmd？

Question

我需要在aws_ecs_task_definition中运行docker，我可以在本地机器上直接运行它，但不能在task_defination上运行。

        docker run -it --rm \
    --name n8n \
    -p 5678:5678 \
    -e DB_TYPE=postgresdb \
    -e DB_POSTGRESDB_DATABASE=<POSTGRES_DATABASE> \
    -e DB_POSTGRESDB_HOST=<POSTGRES_HOST> \
    -e DB_POSTGRESDB_PORT=<POSTGRES_PORT> \
    -e DB_POSTGRESDB_USER=<POSTGRES_USER> \
    -e DB_POSTGRESDB_SCHEMA=<POSTGRES_SCHEMA> \
    -e DB_POSTGRESDB_PASSWORD=<POSTGRES_PASSWORD> \
    -v ~/.n8n:/home/node/.n8n \
    n8nio/n8n \
    n8n start

这是我需要运行的cmd，但在本地可以正常工作，但无法从aws_ecs_task_definition运行。

我试图从container_definitions内部的命令运行cmd，但无法运行。

编辑的

resource "aws_ecs_task_definition" "task-definition" {
  family                = "${var.PROJECT_NAME}-task-definition"
  container_definitions = jsonencode([
    {
      name      = "${var.PROJECT_NAME}-task-container"
      image     = "${var.IMAGE_PATH}"
      cpu       = 10
      memory    = 512
      essential = true
      environment = [
        {name: "DB_TYPE", value: "postgresdb"},
        {name: "DB_POSTGRESDB_DATABASE", value: "${var.DB_NAME}"},
        {name: "DB_POSTGRESDB_HOST", value: "${var.DB_NAME}"},
        {name: "DB_POSTGRESDB_DATABASE", value: "${aws_db_instance.rds.address}"},
        {name: "DB_POSTGRESDB_PORT", value: "5432"},
        {name: "DB_POSTGRESDB_USER", value: "${var.DB_USERNAME}"},
        {name: "DB_POSTGRESDB_PASSWORD", value: "${var.DB_PASSWORD}"},
      ]
      
      command   = [
        "docker", "run", 
        "-it", "--rm", 
        "--name", "${var.IMAGE_PATH}",  
        "-v", "~/.n8n:/home/node/.n8n", 
        "n8nio/n8n", 
        "n8n", "start",
        "n8n", "restart"
      ]

      portMappings = [
        {
          containerPort = 5678
          hostPort      = 5678
        }
      ]
    }
  ])

  depends_on = [
    aws_db_instance.rds
  ]
}

resource "aws_ecs_service" "service" {
  name            = "${var.PROJECT_NAME}-ecs-service"
  cluster         = aws_ecs_cluster.ecs-cluster.id
  task_definition = aws_ecs_task_definition.task-definition.arn
  desired_count   = 1
  iam_role        = aws_iam_role.ecs-service-role.arn
  depends_on      = [aws_iam_policy_attachment.ecs-service-attach]

  load_balancer {
    elb_name       = aws_elb.elb.name
    container_name = "${var.PROJECT_NAME}-task-container"
    container_port = 5678
  }

  
}

Answer 1

ECS任务定义中的command不接受docker命令。ECS正在启动的是应该在docker容器中运行的命令。ECS是一个码头编组服务。ECS在幕后为您运行docker命令，您永远不会给ECS一个直接的docker命令来运行。

在本地运行的docker命令中，在容器中执行的command部件是n8n start。所以你的command应该是：

     command   = [
        "n8n", "start"
      ]

所有其他的docker命令参数，如容器名称、卷映射、环境变量、图像ID，都是您在ECS任务定义的其他地方拥有的参数。似乎您已经在其他地方的任务定义中指定了所有这些参数，但卷映射除外。