LFS258 Lab 3.5 Step 6

cvrupesh

In this step, I picked up IP Address on both Control Plane Node and Worker Node and tried accessing the Application and it works.

Ex: http://32.190.184.218:31293/ and http://32.190.184.219:31293/

In a real-world application deployment scenario, which one should we be asking the end-users to make use of?

chrispokorni

Hi @cvrupesh,

Your observation is correct, a Service can be accessed through either of the cluster nodes. In a real world scenario, however, one would want to shield/protect the public IP addresses of cluster nodes behind a load balancer - this is when a LoadBalancer type Service can help.

The Endpoints of a Service can be deleted manually, but it is best to allow the Service to delete its Endpoints when the kubectl delete service ... command is issued.

Regards,
-Chris

cvrupesh

Also, if I delete the Service it automatically deletes the endpoints as well, what are the implications of doing this or should we always delete the endpoint first and then the service?

cvrupesh

Understood, am I correct with my statement here? It will look like an External Load Balancer routing end-user requests to Control Plane & Work Nodes and then internally the Kube LoadBalancer routing it to one of the pods.

chrispokorni

Hi @cvrupesh,

The external Load Balancer will route a user request to one of the Worker Nodes, and then the Service will load balance/route the request to one of its endpoint Pods.

Regards,
-Chris