ECS Service connect could not resolve host

【以下的问题经过翻译处理】 我正在研究在某个项目中使用ECS Service connect。我已经配置了具有Service connect功能的ECS服务，但是当我尝试从同一命名空间中的其他服务连接它时，会出现curl: (6) Could not resolve host: core的错误。

服务配置

"serviceConnectConfiguration": {
    "enabled": true,
    "namespace": "arn:aws:servicediscovery:us-east-1:***:namespace/ns-awd3wsdifs2nsrla",
    "services": [
        {
            "portName": "core",
            "discoveryName": "core",
            "clientAliases": [
                {
                    "port": 80,
                    "dnsName": "core"
                }
            ]
        }
    ]
},
"serviceConnectResources": [
    {
        "discoveryName": "core",
        "discoveryArn": "arn:aws:servicediscovery:us-east-1:***:service/srv-rirfgcxi4bpplqyj"
    }
]

Curl结果

curl -v http://core:80
* Could not resolve host: core
* Closing connection 0
curl: (6) Could not resolve host: core

curl -v http://core.skc:80
* Could not resolve host: core.skc
* Closing connection 0
curl: (6) Could not resolve host: core.skc

Source service配置

"serviceConnectConfiguration": {
    "enabled": true,
    "namespace": "arn:aws:servicediscovery:us-east-1:***:namespace/ns-awd3wsdifs2nsrla",
    "services": [
        {
            "portName": "admin",
            "discoveryName": "admin",
            "clientAliases": [
                {
                    "port": 77,
                    "dnsName": "admin"
                }
            ]
        }
    ]
},
"serviceConnectResources": [
    {
        "discoveryName": "admin",
        "discoveryArn": "arn:aws:servicediscovery:us-east-1:***:service/srv-niqcn3ec7jgsz27i"
    }
]

VPC 中DNS 和 DNS hostnames enabled 选项已经打开.

{
    "VpcId": "vpc-00bdb82e8d17a444a",
    "EnableDnsSupport": {
        "Value": true
    }
}

{
    "VpcId": "vpc-00bdb82e8d17a444a",
    "EnableDnsHostnames": {
        "Value": true
    }
}

还有其他我漏掉的吗?