v2.2.0-kubernetes-0.4.0

Major features and fixes in this release include:

• Support for HDFS locality.
• Added an option to use a secret to mount small files in driver and executors.
• Support for custom Kubernetes service account for the driver pod.
• Support for executor java options.
• Fixed conversion from MB to MiB in driver and executor memory specification.
• Added configuration properties for injecting arbitrary Kubernetes secrets into the driver and executors.
• Use a headless service to give a hostname to the driver (requiring Kubernetes DNS in the cluster).
• Improved docker image build/push flow.
• Added the ability to fail submission if submitter-local files are provided without the resource staging server URI.
• Added reference YAML files for RBAC configs for driver and shuffle service.

Deprecations and removals:

• Removed support for spark.kubernetes.driver.labels, spark.kubernetes.driver.annotations, spark.kubernetes.executor.labels,
  spark.kubernetes.executor.annotations which were deprecated. They have been superseded by new properties.
  See documentation for details.