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I am trying to transform my environment setup from a single cluster to a multi-cluster setup. We have a set of support applications used by us that deploy an application for each of our customers. Our idea is to have a host cluster that contains our support applications and then the applications that the customers use will be on a second cluster (and a third and so on when they get overcrowded).
We have followed this guide https://cloud.google.com/kubernetes-engine/docs/how-to/deploying-multi-cluster-gateways#external-gat... and deployed the `external-gateway` and the `wheremai` test application. And that works fine, we can access the `wheremai` application from both clusters with no problem. Then we deployed one of our support applications in the exact same way as the dummy `wheremai` API with a `Service` and `ServiceExport` and then we added an `HTTPRoute` that points to our application. That `HTTPRoute` created a backend in our load balancer but the health check comes as `0 of 1` for some reason. We have checked and our application is running fine and we can make requests to it (using curl) and get a response back. In the networking endpoint we get the following error:
Are we missing something here? Why does the health check not work which in turn stops the gateway from routing traffic to the application?
We are running the project in a Shared VPC set up so we have also followed this guide to enable it: https://cloud.google.com/kubernetes-engine/docs/how-to/msc-setup-with-shared-vpc-networks
EDIT:
After a long time of trying I have managed to fix this issue. To fix it I had to create an endpoint in my API that returns HTTP 200 Code for the health check. I have created an endpoint on "/health" and "/" as I wasn't sure which one it was looking for.
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