To test connections and outputs.
Anywhere. Even ad hoc in a k8s cluster.
https://hub.docker.com/repository/docker/hcwalfisch/tools
docker build -t tools . && docker run -it --rm tools
docker login docker.io # just once or so
./tag
kubectl -n default run -it --tty --rm debug-delete-me --image=hcwalfisch/tools:latest --restart=Never -- bash
Add a pod to your cluster, so that you can test the in cluster network (or whatever). The pod should be auto-removed when finished.