ecs-cli通过负载均衡器组成服务

问题描述

我正在尝试使用ecs-cli compose在Amazon ECS上管理我的服务和任务.

I am trying to use ecs-cli compose to manage my services and tasks on Amazon ECS.

我找不到使用service up命令通过应用程序负载平衡器创建新服务的方法(即使该负载平衡器已经存在).

I'm unable to find a way using the service up command to create a new service with an application load balancer (even when that load balancer already exists).

使用service create似乎可行，但是该API与service up API不同，并且我不确定如何使用create同样地指定参数.而且通常最好只使用up命令以保持一致性.文档非常分散，做相同的事情有很多不同的方法，只是想知道这里有什么最佳实践.任何建议，不胜感激.

This seems possible with service create, but the API is different from the service up API, and I'm not sure how to specify params in the same way with create. And it would generally be preferable to use just the up command for consistency. The documentation is pretty scattered, there's many different ways to do the same things, just wondering what best practice is here. Any suggestions greatly appreciated.

值得一提的是，只要我有一个现有的任务定义，并且在指定负载均衡器的同时通过Amazon AWS GUI创建服务，一切都对我有用.所以我正在考虑将我所有的compose配置都移到task-definition.json中，并直接与aws ecs cli一起使用.

Worth noting, everything is working for me, so long as I have an existing task definition and I create my service through the Amazon AWS GUI while specifying the load balancer. So I'm thinking about moving all my compose config into a task-definition.json and use it directly with aws ecs cli.

我有一个有效的docker-compose.yml文件:

# docker-compose.yml

version: "3"

services:
  application:
    image: ${IMAGE_ARN}
    command: npm start
    ports:
      - "8000:8000"
  nginx:
    image: ${IMAGE_ARN}
    ports:
      - "80:80"

以及随附的ecs-params.yml文件:

# ecs-params.yml

version: 1

task_definition:
  task_role_arn: ${ROLE_ARN}
  task_execution_role: ${ROLE_ARN}
  ecs_network_mode: awsvpc
  task_size:
    mem_limit: 0.5GB
    cpu_limit: 256
  container_definitions:
    - name: application
    - name: nginx

run_params:
  network_configuration:
    awsvpc_configuration:
      assign_public_ip: ENABLED
      subnets:
        - ${SUBNET_1_ID}
        - ${SUBNET_2_ID}
      security_groups:
        - ${SECURITY_GROUP_ID}

我运行来启动该服务的命令是:

The command that I run to bring the service up is:

ecs-cli compose service up \
--file docker-compose.yaml \
--ecs-params ecs-params.yaml \
--project-name service-name

通过该命令指定负载均衡器配置的任何方式吗?

Any way to specify the load balancer configuration through that command?

推荐答案

似乎最新的ecs-cli版本确实支持服务启动时的负载均衡器配置.

It seems like latest ecs-cli version does support load balancer configuration with service up.

您是否尝试提供--target-group-arn选项?假设您已经创建了ALB和目标组来关联ECS服务.这是我刚刚测试过的示例命令.

Have you tried providing --target-group-arn option?. Assuming you have already created ALB and Target Group to associate ECS service. Here is sample command I just tested.

ecs-cli compose --file docker-compose.yaml --project-name nginx \
--ecs-params ecs-params.yaml service up \
--target-group-arn "arn:aws:elasticloadbalancing:us-east-1:xxxxxxxx:targetgroup/awsvpc-nginx/2bf8921935c827bd" \
--container-name nginx --container-port 80

注意-

1. target-group-arn，container-name和container-port选项对于负载平衡器关联是必需的，并且必须在service up之后的命令中提供.
2. 我看到您正在尝试使用awsvpc模式执行任务.我不确定您是否要尝试启动EC2或Fargate类型的启动容器.
3. 如果您确实希望使用awsvpc模式，请确保您的负载均衡器目标组已创​​建了类型为ip而不是instance的目标.
4. 如果您使用的是EC2启动类型，但使用awsvpc模式，请确保EC2 AMI是Amazon-ECS优化AMI.如果您使用的是Fargate类型，则您的assign_public_ip应该为DISABLED.

1. target-group-arn, container-name and container-port options are mandatory for load balancer association and they have to be provided in command after service up.
2. I see you are trying to use awsvpc mode for the tasks. I am not sure you are trying to bring up EC2 or Fargate type launch container.
3. If you do want awsvpc mode then please make sure your load balancer target group has target created with type ip instead of instance.
4. If you are on EC2 launch type but with awsvpc mode then please make sure EC2 AMI is Amazon-ECS Optimized AMI. If you are on Fargate type then your assign_public_ip should DISABLED.

让我知道您的反馈意见.

Do let me know your feedback.

参考- https://docs.aws.amazon .com/AmazonECS/latest/developerguide/cmd-ecs-cli-compose-service.html

https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task-networking.html

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