MountVolumesFeatureStep¶

MountVolumesFeatureStep is a KubernetesFeatureConfigStep.

Creating Instance¶

MountVolumesFeatureStep takes the following to be created:

• KubernetesConf

MountVolumesFeatureStep is created when:

• KubernetesDriverBuilder is requested to build a driver pod spec
• KubernetesExecutorBuilder is requested to build an executor pod spec

Configuring Driver Pod¶

configurePod(
  pod: SparkPod): SparkPod

configurePod is part of the KubernetesFeatureConfigStep abstraction.

configurePod constructs the volumes and volume mounts from the volumes (of the KubernetesConf) and creates a new SparkPod:

• Adds the volumes to the pod specification

• Adds the volume mounts to the container specification

constructVolumes¶

constructVolumes(
  volumeSpecs: Iterable[KubernetesVolumeSpec]): Iterable[(VolumeMount, Volume)]

constructVolumes creates Kubernetes VolumeMounts and Volumes based on the given KubernetesVolumeSpec specs.

VolumeMounts are built based on the following:

• mountPath
• mountReadOnly
• mountSubPath
• volumeName

Volumes are build based on the type of the volume:

• HostPath
• PersistentVolumeClaim
• EmptyDir

In the end, Volumes and VolumeMounts are wired together using volumeName.