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Add more detailed comment for localOnly flag in getPortworxDriver function

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This commit is contained in:
Harsh Desai 2017-07-14 13:18:38 -07:00
parent 7268e2e2e8
commit 90919e3e4e
1 changed files with 7 additions and 2 deletions
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9
pkg/volume/portworx/portworx_util.go
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@ -189,8 +189,13 @@ func createDriverClient(hostname string) (*osdclient.Client, error) {
// getPortworxDriver() returns a Portworx volume driver which can be used for volume operations
// localOnly: If true, the returned driver will be connected to Portworx API server on volume host.
// If false, driver will be connected to API server on volume host or Portworx k8s service cluster IP
// This flag is required to explictly force certain operation requests (mount, unmount, detach, attach) to
// go to the volume host instead of the k8s service which might route it to any host.
// This flag is required to explicitly force certain operations (mount, unmount, detach, attach) to
// go to the volume host instead of the k8s service which might route it to any host. This pertains to how
// Portworx mounts and attaches a volume to the running container. The node getting these requests needs to
// see the pod container mounts (specifically /var/lib/kubelet/pods/<pod_id>)
// Operations like create and delete volume don't need to be restricted to local volume host since
// any node in the Portworx cluster can co-ordinate the create/delete request and forward the operations to
// the Portworx node that will own/owns the data.
func (util *PortworxVolumeUtil) getPortworxDriver(volumeHost volume.VolumeHost, localOnly bool) (volumeapi.VolumeDriver, error) {
var err error
if localOnly {