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Pawan Prakash Sharma d0e97cddb2 adding topology support for zfspv (#7) 
This PR adds support to allow the CSI driver to pick up a node matching the  topology specified in the storage class. Admin can specify allowedTopologies in the StorageClass to specify the nodes where the zfs pools are setup

```yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: openebs-zfspv
allowVolumeExpansion: true
parameters:
  blocksize: "4k"
  compression: "on"
  dedup: "on"
  thinprovision: "yes"
  poolname: "zfspv-pool"
provisioner: zfs-localpv
volumeBindingMode: WaitForFirstConsumer
allowedTopologies:
- matchLabelExpressions:
  - key: kubernetes.io/hostname
    values:
      - gke-zfspv-pawan-default-pool-c8929518-cgd4
      - gke-zfspv-pawan-default-pool-c8929518-dxzc
```

Note: This PR picks up the first node from the list of nodes available.

Signed-off-by: Pawan <pawan@mayadata.io>
2019-11-01 06:46:04 +05:30
..
sample adding topology support for zfspv (#7) 2019-11-01 06:46:04 +05:30
zfs-operator.yaml adding topology support for zfspv (#7) 2019-11-01 06:46:04 +05:30