Creates a new ContainerVolume.
containerPath The path in the container where the volume will be mounted.
fromContainer The container where the volume is coming from.
hostPath The path on the host where the volume is coming from. If hostPath is set, it takes precedence over volumeName.
readOnly If true, this volume will be readonly. Defaults to false.
selinuxRelabel SELinux relabel mode for bind mounts. Supported values are z and Z.
volumeName The name of the docker volume which should be mounted. Ignored when hostPath is set.