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  // topologyKeys is the list of keys supported by the driver.
  // When a driver is initialized on a cluster, it provides a set of topology
  // keys that it understands (e.g. "company.com/zone", "company.com/region").
  // When a driver is initialized on a node, it provides the same topology keys
  // along with values. Kubelet will expose these topology keys as labels
  // on its own node object.

  // +optional
  optional bool readOnly = 6;
}

// Represents a cinder volume resource in Openstack.
// A Cinder volume must exist before mounting to a container.
// The volume must also be in the same region as the kubelet.
// Cinder volumes support ownership management and SELinux relabeling.
message CinderPersistentVolumeSource {
  // volumeID used to identify the volume in cinder.

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