d691748aa6
For ObjectMeta pruning, we round trip through marshalling and unmarshalling. If the ObjectMeta contained any strings with "" (or other fields with empty values) _and_ the respective fields are omitempty, those fields will be lost in the round trip process. This makes ObjectMeta after the no-op write different from the one before the write. Resource version is incremented every time data is written to etcd. Writes to etcd short-circuit if the bytes being written are identical to the bytes already present. So this ends up incrementing the resourceVersion even on no-op writes. The zero values are set in BeforeCreate and BeforeUpdate. This commit updates BeforeUpdate such that zero values are only set when the object does not have a zero value for the respective field.
Kubernetes
Kubernetes is an open source system for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications.
Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.
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