Deprecated APIs Removed in Kubernetes 1.16
As the Kubernetes API evolves, APIs are periodically reorganized or upgraded. When APIs evolve, the old API is deprecated and eventually removed. The 1.16 release will deprecate APIs for four services: None of these resources will be removed from Kubernetes or deprecated in any way.
However, to continue using these resources, you must use a current version of the Kubernetes API. NetworkPolicy: will no longer be served from extensions/v1beta1 in v1.16.Migrate to the networking.k8s.io/v1 API, available since v1.8. Existing persisted data can be retrieved/updated via the networking.k8s.io/v1 API.PodSecurityPolicy: will no longer be served from extensions/v1beta1 in v1.16.Migrate to the policy/v1beta1 API, available since v1.10.
Existing persisted data can be retrieved/updated via the policy/v1beta1 API.DaemonSet, Deployment, StatefulSet, and ReplicaSet: will no longer be served from extensions/v1beta1, apps/v1beta1, or apps/v1beta2 in v1.16.Migrate to the apps/v1 API, available since v1.9. Existing persisted data can be retrieved/updated via the apps/v1 API.Ingress: will no longer be served from extensions/v1beta1 in v1.18.Migrate to the networking.k8s.io/v1beta1 API. Existing persisted data can be retrieved/updated via the networking.k8s.io/v1beta1 API.
Source: kubernetes.io