* rbd: default image format to v2 instead of deprecated v1 ([#51574](https://github.com/kubernetes/kubernetes/pull/51574), [@dillaman](https://github.com/dillaman))
* Surface reasonable error when client detects connection closed. ([#51381](https://github.com/kubernetes/kubernetes/pull/51381), [@mengqiy](https://github.com/mengqiy))

* Add a way to pass extra arguments to etcd. ([#63961](https://github.com/kubernetes/kubernetes/pull/63961), [@mborsz](https://github.com/mborsz))
* kubeadm: surface external etcd preflight validation errors ([#60585](https://github.com/kubernetes/kubernetes/pull/60585), [@alexbrand](https://github.com/alexbrand))



# v1.10.3

  - The issuer of the certificate is unknown (x509.UnknownAuthorityError)
  - The requested name does not match the set of authorized names (x509.HostnameError)

Apps moved the Kubernetes workloads API to the new apps/v1beta2 group and version. The DaemonSet, Deployment, ReplicaSet, and StatefulSet objects are affected by this change. The new apps/v1beta2 group and version provide a stable and consistent API surface for building applications in Kubernetes. For details about deprecations and behavioral changes, see [Notable Features](#notable-features). SIG Apps intends to promote this version to GA in a future release.

[SIG Apps]: https://github...

  - The issuer of the certificate is unknown (x509.UnknownAuthorityError)
  - The requested name does not match the set of authorized names (x509.HostnameError)

Two alpha features were also added in this release.

The RuntimeClass alpha feature enables a node to surface multiple runtime options to support a variety of workload types.  Examples include native linux containers, and “sandboxed” containers that isolate the container from the host kernel.

SIG Storage made a lot of progress in the 1.18 release.
In particular, the following storage features are moving to GA in Kubernetes 1.18:
- Raw Block Support: Allow volumes to be surfaced as block devices inside containers instead of just mounted filesystems.
- Volume Cloning: Duplicate a PersistentVolumeClaim and underlying storage volume using the Kubernetes API via CSI.

* Add generators for `apps/v1` deployments. ([#61288](https://github.com/kubernetes/kubernetes/pull/61288), [@ayushpateria](https://github.com/ayushpateria))
* kubeadm: surface external etcd preflight validation errors ([#60585](https://github.com/kubernetes/kubernetes/pull/60585), [@alexbrand](https://github.com/alexbrand))

  - The issuer of the certificate was unknown (`x509.UnknownAuthorityError`)
  - The requested name did not match the set of authorized names (`x509.HostnameError`)

* Added DNS Reverse Record logic for service IPs ([#26226](https://github.com/kubernetes/kubernetes/pull/26226), [@ArtfulCoder](https://github.com/ArtfulCoder))
* read gluster log to surface glusterfs plugin errors properly in describe events ([#24808](https://github.com/kubernetes/kubernetes/pull/24808), [@screeley44](https://github.com/screeley44))



# v1.3.0-alpha.5