How to manage gluster volumes in CNS

Solution In Progress - Updated -

Issue

1) where I can see the space used and the space free of a volume in fe heketi, a persistent volume and a perstistent volume claim. How can we monitor the space usage?
2) Also it is not clear how we can increase the size specified during the creation of a pv and a pvc.
I fe. increased via heketi-cli the size of a volume but how can I increase the size of an existing pv?
3) What's the use case for taking snapshots of a glusterfs volume?
4) Is there some glusterfs mgmt console which can be used?

Environment

  • Openshift Container Platform
    • 3.5

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