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feat(resize): adding Online volume expansion support for ZFSPV

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We can resize the volume by updating the PVC yaml to
the desired size and apply it. The ZFS Driver will take care
of updating the quota in case of dataset. If we are using a
Zvol and have mounted it as ext4 or xfs filesystem, the driver will take
care of expanding the volume via reize2fs/xfs_growfs binaries.

For resize, storageclass that provisions the pvc must suppo
rt resize. We should have allowVolumeExpansion as true in storageclass

```yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: openebs-zfspv
allowVolumeExpansion: true
parameters:
  poolname: "zfspv-pool"
provisioner: zfs.csi.openebs.io

```

Signed-off-by: Pawan <pawan@mayadata.io>
This commit is contained in:
Pawan 2020-03-02 12:03:03 +05:30 • committed by Kiran Mova
parent dc5edb901c
commit 86e623a369
7 changed files with 278 additions and 3 deletions
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39
pkg/zfs/zfs_util.go
View file

@ -236,6 +236,27 @@ func buildVolumeSetArgs(vol *apis.ZFSVolume) []string {
return ZFSVolArg
}
// builldVolumeResizeArgs returns volume set for resizing the zfs volume
func buildVolumeResizeArgs(vol *apis.ZFSVolume) []string {
var ZFSVolArg []string
volume := vol.Spec.PoolName + "/" + vol.Name
ZFSVolArg = append(ZFSVolArg, ZFSSetArg)
if vol.Spec.VolumeType == VOLTYPE_DATASET {
quotaProperty := "quota=" + vol.Spec.Capacity
ZFSVolArg = append(ZFSVolArg, quotaProperty)
} else {
volsizeProperty := "volsize=" + vol.Spec.Capacity
ZFSVolArg = append(ZFSVolArg, volsizeProperty)
}
ZFSVolArg = append(ZFSVolArg, volume)
return ZFSVolArg
}
// builldVolumeDestroyArgs returns volume destroy command along with attributes as a string array
func buildVolumeDestroyArgs(vol *apis.ZFSVolume) []string {
var ZFSVolArg []string
@ -496,3 +517,21 @@ func GetVolumeDevPath(vol *apis.ZFSVolume) (string, error) {
return dev, nil
}
func ResizeZFSVolume(vol *apis.ZFSVolume, mountpath string) error {
volume := vol.Spec.PoolName + "/" + vol.Name
args := buildVolumeResizeArgs(vol)
cmd := exec.Command(ZFSVolCmd, args...)
out, err := cmd.CombinedOutput()
if err != nil {
logrus.Errorf(
"zfs: could not resize the volume %v cmd %v error: %s", volume, args, string(out),
)
return err
}
err = handleVolResize(vol, mountpath)
return err
}