adding topology support for zfspv

[pawanpraka1]

We can provide the topology in storage class where the zfs pools are setup

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

The scheduler will take care of scheduling the application on the appropriate node.

Signed-off-by: Pawan pawan@mayadata.io

[codecov-io]

Codecov Report

Merging #7 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #7   +/-   ##
=======================================
  Coverage   89.55%   89.55%           
=======================================
  Files           1        1           
  Lines          67       67           
=======================================
  Hits           60       60           
  Misses          7        7

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[kmova]

Can the topology be specified using node selectors ?

[pawanpraka1]

yeah, you can specify both. But make sure both the setting are compliance with each other, otherwise pod will not be scheduled.