Say you followed my instructions to deploy a React app to the Oracle Cloud Infrastructure (OCI) Container Engine for Kubernetes (OKE)
Now you made some changes that require you to change the OCI Compute Instances used by the pods. Some cases where this can be required is when you change the number of replicas or version of your OKE node pools.
We assume the new OKE pods have been manually/automatically created.
When this happens, you need to update the OCI Load Balancer to use the correct Backend IP address and port in order for the load balancer to properly route external connections to the correct Compute Instance.
How to ensure the Load Balancer routes the traffic to the new pods
In the OCI Console, go to:
> Load Balancers
> (select your OKE Load Balancer)
> Backend sets
> (select your desired set, e.g., TCP-80)
> Backends
Add your new Backend IP address and Port. Select from the given list of Backends and put down the correct port number.
Example
Say you currently have this on your kubectl get all:
As you can see, I have a container running on port 80 and another in port 8000.
In the Load Balancer page, I need to make sure the Backends are pointing to the correct Instance IP address and port numbers.
Here is the screenshot of my Load Balancer's backend set for TCP-80:
The port number is 32577 which is equal to the port number forwarded under service/myApp-lb, port listed being 80:32577/TCP.
The IP address which ends in .178 meanwhile is the private IP address of the Instance running this pod, as shown in this screenshot of the Instance:
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