gmortar
(Optionally) use https://www.github.com/matti/gbuild to build your image
gbuild build gcr.io/project/name
Then
gmortar fire gcloud_project europe-north1 gke_name k8smanifests shotname \
--var some=value --var another=value
gmortar list gcloud_project europe-north1 gke_name
gmortar describe gcloud_project europe-north1 gke_name shotname
gmortar yank gcloud_project europe-north1 gke_name shotname