Jonas
2020-12-01 06:03:59
if it is possible to forward a request to both instances (XYZ-1 and XYZ-2) when the request endpoint is testendpoint
This is not a feature in the HTTP protocol, so you need a purpose built service to handle this.
The use case to refresh a service in-memory data via a rest call once a day or twice and the rest call will be triggered by another service when needed. so want to make sure all pod instances update/refresh in-memory data by an HTTP request.
I suggest that you create a new utility service, "update-service" - that you send the call once a day to. This service then makes a request to every instance of XYZ, like XYZ-1 and XYZ-2.
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Hi Jonas, thanks for the response. Is there any AKS (or K8S) API's available to achieve this to find all instances and send requests to those?
If
XYZis deployed as a StatefulSet (instead of Deployment), then this is easy, since your Pods will have the name as you wrote,XYZ-0,XYZ-1...depending on how many replicas you have. For Deployment, it is easies to query Pods with the same labels as in your "selector", using a library, e.g. github.com/kubernetes/client-go or github.com/kubernetes-client/javaInstead of using a Kubernetes client (and setting up the required permissions / service accounts) you might consider using an additional headless service that doesn’t have its own cluster ip and load balancing but instead returns all healthy pod ips when doing a dns lookup. See dev.to/kaoskater08/…