AWS ECS CloudFormation 无法使用服务发现注册表创建服务

Question

I have the following lines in my stack template:

Service:
        Type: AWS::ECS::Service
        DependsOn: ListenerRule
        Properties:
            LaunchType: EC2
            ServiceRegistries:
                - RegistryArn: {"Fn::GetAtt": [ServiceDiscovery, Arn]}...
ServiceDiscovery:
      Type: "AWS::ServiceDiscovery::Service"
      Properties:
        Description: Service discovery registry
        DnsConfig:
          DnsRecords: [{"Type": "SRV", "TTL": 100}]
          NamespaceId:
            Fn::ImportValue: PrivateDNS
        Name: ping-service

Task definition network mode = "host".

When I push the template I see the following error: When specifying 'host' or 'bridge' for networkMode, values for 'containerName' and 'containerPort' must be specified from the task definition

However if registry properties 'containerName' and 'containerPort' are set then it throws another error: Encountered unsupported property containerName

How can service discovery registry be created with CloudFormation?

Answer 1

It's not possible to specify those properties from CloudFormation yet. As seen in the developer guide for ECS you have to specify containerName from the serviceRegistries parameter. But when we look at the CloudFormation ServiceRegistry documentation we can't find those options:

{
  "Port" : Integer,
  "RegistryArn" : String
}

Answer 2

I got When specifying 'host' or 'bridge' for networkMode, values for 'containerName' and 'containerPort' must be specified from the task definition when simply trying to create an EC2 deployment type with Host networking on an existing Service Discovery service. The fix was to create the ECS service with a Service Discovery type of "SRV" instead of "A" (the error should read more like "Service Discovery A records are not compatible with EC2 Host networking.")