mirror of
https://github.com/TECHNOFAB11/zfs-localpv.git
synced 2025-12-12 06:20:11 +01:00
43 lines
1.4 KiB
Go
43 lines
1.4 KiB
Go
/*
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Copyright 2020 The OpenEBS Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package btrfs
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import (
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"os/exec"
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"k8s.io/klog"
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)
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/*
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* We have to generate a new UUID for the cloned volumes with btrfs filesystem
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* otherwise system will mount the same volume if UUID is same. Here, since cloned
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* volume refers to the same block because of the way ZFS clone works, it will
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* also have the same UUID.
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*/
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// GenerateUUID generates a new btrfs UUID for the given device
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func GenerateUUID(device string) error {
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// for mounting the cloned volume for btrfs, a new UUID has to be generated
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cmd := exec.Command("btrfstune", "-f", "-u", device)
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out, err := cmd.CombinedOutput()
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if err != nil {
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klog.Errorf("btrfs: uuid generate failed for device %s error: %s", device, string(out))
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return err
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}
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klog.Infof("btrfs: generated UUID for the device %s \n %v", device, string(out))
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return nil
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}
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