Taken from https://github.com/kubernetes/kubernetes/blob/master/pkg/util/labels/labels.go CloneAndRemoveLabel clones the given map and returns a new map with the given key removed.

https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/deployment/util/deployment_util.go#L331 SetDeploymentAnnotationsTo sets deployment's annotations as given RS's annotations.

https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/deployment/util/deployment_util.go#L679 SetFromReplicaSetTemplate sets the desired PodTemplateSpec from a replica set template to the given deployment.

DesiredReplicasAnnotation is the desired replicas for a deployment recorded as an annotation in its replica sets.

MaxReplicasAnnotation is the maximum replicas a deployment can have at a given point, which is deployment.spec.replicas + maxSurge.

RevisionAnnotation is the revision annotation of a deployment's replica sets which records its rollout sequence.

RevisionHistoryAnnotation maintains the history of all old revisions that a replica set has served for a deployment.

Controller holds all non request-scoped objects.

Merge strategy can be "strategic", "json", or "merge".