message VolumeAttachmentStatus {
  // attached indicates the volume is successfully attached.
  // This field must only be set by the entity completing the attach
  // operation, i.e. the external-attacher.
  optional bool attached = 1;

  // attachmentMetadata is populated with any
  // information returned by the attach operation, upon successful attach, that must be passed

  repeated IPAddress items = 2;
}

// IPAddressSpec describe the attributes in an IP Address.
message IPAddressSpec {
  // ParentRef references the resource that an IPAddress is attached to.
  // An IPAddress must reference a parent object.
  // +required
  optional ParentReference parentRef = 1;
}

// ParentReference describes a reference to a parent object.
message ParentReference {