JKube

Insert your laptop into running cluster

Eclipse JKube can hijack a service in the cluster on your behalf. You replace the current application in the cluster with your local laptop. Doc: https://eclipse.dev/jkube/docs/kubernetes-maven-plugin/#jkube:remote-dev

You need to suspend flux, to avoid reconciliation which would reset the manual configuration. You also need to adjust your Kubernetes context so you are in the correct namespace.

Steps:

• Start k8sdebug locally, change output
• Check output from currently running cluster: http://k8sdebug-app.local.gd:31090/
• Ensure you have a connection to k8s, and that you have the apps namespace active. You should see the k8sdebug pod:

kubectl config set-context --current --namespace=apps
kubectl get pods

• Suspend Flux, so it does not reset config:

flux suspend kustomization k8sdebug

• Start k8sdebug locally, change output
• pom.xml has configuration for hijack. Do:

cd ../spring-app
./mvnw k8s:remote-dev

• Check output again: http://k8sdebug-app.local.gd:31090/

With the steps above, you should observe output from your locally running application.

Have a look the pods in the namespace - you have got a new one:

kubectl get pods

When done, stop maven job with CTRL+C, and remember to resume Flux:

flux resume kustomization k8sdebug