Question

From a regular ECS container running with the bridge mode, or from a standard EC2 instance, I usually run

curl http://169.254.169.254/latest/meta-data/local-ipv4

to retrieve my IP.

In an ECS container running with the awsvpc network mode, I get the IP of the underlying EC2 instance which is not what I want. I want the address of the ENI attached to my container. How do I do that?

Answer 1

A new convenience environment variable is injected by the AWS container agent into every container in AWS ECS: ${ECS_CONTAINER_METADATA_URI}

This contains the URL to the metadata endpoint, so now you can do

curl ${ECS_CONTAINER_METADATA_URI}

The output looks something like

{  
   "DockerId":"redact",
   "Name":"redact",
   "DockerName":"ecs-redact",
   "Image":"redact",
   "ImageID":"redact",
   "Labels":{  },
   "DesiredStatus":"RUNNING",
   "KnownStatus":"RUNNING",
   "Limits":{  },
   "CreatedAt":"2019-04-16T22:39:57.040286277Z",
   "StartedAt":"2019-04-16T22:39:57.29386087Z",
   "Type":"NORMAL",
   "Networks":[  
      {  
         "NetworkMode":"awsvpc",
         "IPv4Addresses":[  
            "172.30.1.115"
         ]
      }
   ]
}

Under the key Networks you'll find IPv4Address

Answer 2

从Amazon ECS控制台：

单击<您的集群>
点击<您的服务>
点击“任务”标签
单击<您的任务>
在此处查看网络详细信息

从CLI：

如果是EC2，请登录到实例并运行docker exec -it hostname -f
或只问ecs-ecs-cli ps --cluster < your cluster >

作为EC2模式下的VPC连接资源，它也在以下列表中列出：

EC2群集实例IP（即，检查EC2实例详细信息）
EC2中的“网络接口”部分（搜索对“ arn：aws：ecs”的描述）

How do I get my IP address from inside an ECS container running with the awsvpc network mode?

2 个答案: