instruction: Create a Kubernetes Service configuration with best practices
output: ```dockerfile
  from Services inside the same
  (virtual) network address block.In a split-horizon DNS environment you would need two Services to be able to route both external
  and internal traffic to your endpoints.To set an internal load balancer, add one of the following annotations to your Service
  depending on the cloud service provider you're using:DefaultGCPAWSAzureIBM CloudOpenStackBaidu CloudTencent CloudAlibaba CloudOCISelect one of the tabs.metadata:
   name: my-service
   annotations:
   networking.gke.io/load-balancer-type: "Internal"
  metadata:
   name: my-service
   annotations:
   service.beta.kubernetes.io/aws-load-balancer-internal: "true"
  metadata:
   name: my-service
   annotations:
   service.beta.kubernetes.io/azure-load-balancer-internal: "true"
  metadata:
   name: my-service
   annotations:
   service.kubernetes.io/ibm-load-balancer-cloud-provider-ip-type: "private"
  metadata:
   name: my-service
   annotations:
   service.beta.kubernetes.io/openstack-internal-load-balancer: "true"
  metadata:
   name: my-service
   annotations:
   service.beta.kubernetes.io/cce-load-balancer-internal-vpc: "true"
  metadata:
   annotations:
   service.kubernetes.io/qcloud-loadbalancer-internal-subnetid: subnet-xxxxx
  metadata:
   annotations:
   service.beta.kubernetes.io/alibaba-cloud-loadbalancer-address-type: "intranet"
  metadata:
   name: my-service
   annotations:
   service.beta.kubernetes.io/oci-load-balancer-internal: true
  type: ExternalNameServices of type ExternalName map a Service to a DNS name, not to a typical selector such as
  my-service or cassandra. You specify these Services with the spec.externalName parameter.This Service definition, for example, maps
  the my-service Service in the prod namespace to my.database.example.com:apiVersion: v1
  kind: Service
  metadata:
   name: my-service
   namespace: prod
  spec:
   type: ExternalName
   externalName: my.database.example.com
  Note:A Service of type: ExternalName accepts an IPv4 address string,
  but treats that string as a DNS name comprised of digits,
  not as an IP address (the internet does not however allow such names in DNS).
  Services with external names that resemble IPv4
  addresses are not resolved by DNS servers.If you want to map a Service directly to a specific IP address, consider using
  headless Services.When looking up the host my-service.prod.svc.cluster.local, the cluster DNS Service
  returns a CNAME record with the value my.database.example.com. Accessing
  my-service works in the same way as other Services but with the crucial
  difference that redirection happens at the DNS level rather than via proxying or
  forwarding. Should you later decide to move your database into your cluster, you
  can start its Pods, add appropriate selectors or endpoints, and change the
  Service's type.Caution:You may have trouble using ExternalName for some common protocols, including HTTP and HTTPS.
  If you use ExternalName then the hostname used by clients inside your cluster is different
  ```