BaseAnnotations returns the base annotations we apply to all objects created by the operator for a given cluster.

PodAnnotations is for specifying annotations that are only to be applied to the pods such as prometheus scrape tags.

App is the label used to identify the application.

AppM3DB is the value for "App" common to all operator-created clusters.

Cluster is the label identifying what m3db cluster an object is a part of.

EnabledVal is the value that indicates an annotation is enabled.

ParallelUpdate is the annotation used by the operator to determine if a StatefulSet is allowed to be updated in parallel.

ParallelUpdateInProgress is the annotation used by the operator indicate a parallel update is underway.

Update is the annotation used by the operator to determine if a StatefulSet is allowed to be updated.