### Other notable changes

* The kube-apiserver --service-account-key-file option can be specified multiple times, or can point to a file containing multiple keys, to enable rotation of signing keys. ([#34029](https://github.com/kubernetes/kubernetes/pull/34029), [@liggitt](https://github.com/liggitt))

      * In 1.4, either that key or this key: `pods.beta.kubernetes.io/init-containers`,can be used.
    * When you GET an object, you will see both annotation keys with the same values.
      You can safely roll back from 1.4 to 1.3, and things with init-containers
      will still work (pods, deployments, etc).
    * If you are running 1.3, only use the alpha annotation, or it may be lost when
      rolling forward.

   ([#123696](https://github.com/kubernetes/kubernetes/pull/123696), [@aramase](https://github.com/aramase))
- kubelet allowed specifying a custom root directory for pod logs (instead of the default /var/log/pods) using the `podLogsDir` key in kubelet configuration.
   ([#112957](https://github.com/kubernetes/kubernetes/pull/112957), [@mxpv](https://github.com/mxpv))