Libvirt Storage Volume Renaming: Difference between revisions

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There is no [[virsh]] command to rename a volume, but it can be achieved via the following sequence of steps:
There is no [[virsh]] command to rename a volume, but it can be achieved via the following sequence of steps:


1. Shutdown all the virtual machines that use the volume.
1. Shutdown all the virtual machines that use the volume:
 
virsh shutdown test-vm


2. Clone the volume, under a different name.
2. Clone the volume, under a different name.


3. Delete the original storage volume from the pool with [[virsh vol-delete]]. Note that [[virsh vol-delete]] will also delete the ''content'' of the underlying storage, not just removes the storage volume definition from the pool. <font color=red>TODO: verify this one more time and Wan in virsh vol-delete</font>.
virsh vol-clone --pool main-storage-pool test-volume.raw test-volume-2.raw
 
For more details, see [[virsh vol-clone]].
 
3. Edit the definition of the virtual machines using the volume, and change the name of the logical volume in the definition.
 
Replace:
 
...
<disk type='file' device='disk'>
    <driver name='qemu' type='raw'/>
    &lt;source file='/main-storage-pool/<b>test-volume.raw</b>'/>
    <target dev='vdb' bus='virtio'/>
    <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
</disk>
...
 
with
 
...
<disk type='file' device='disk'>
    <driver name='qemu' type='raw'/>
    &lt;source file='/main-storage-pool/<b>test-volume-2.raw</b>'/>
    <target dev='vdb' bus='virtio'/>
    <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
</disk>
...
 
4. Restart the virtual machine, it should not detect any difference.
 
5. Optional: Delete the original storage volume from the pool with [[virsh vol-delete]]. Note that [[virsh vol-delete]] will also ''delete the content'' of the underlying storage, not just removes the storage volume definition from the pool.


  virsh vol-delete test-volume.img main-storage-pool
  virsh vol-delete test-volume.img main-storage-pool

Latest revision as of 21:43, 30 June 2017

Internal

Overview

There is no virsh command to rename a volume, but it can be achieved via the following sequence of steps:

1. Shutdown all the virtual machines that use the volume:

virsh shutdown test-vm

2. Clone the volume, under a different name.

virsh vol-clone --pool main-storage-pool test-volume.raw test-volume-2.raw

For more details, see virsh vol-clone.

3. Edit the definition of the virtual machines using the volume, and change the name of the logical volume in the definition.

Replace:

...
<disk type='file' device='disk'>
    <driver name='qemu' type='raw'/>
    <source file='/main-storage-pool/test-volume.raw'/>
    <target dev='vdb' bus='virtio'/>
    <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
</disk>
...

with

...
<disk type='file' device='disk'>
    <driver name='qemu' type='raw'/>
    <source file='/main-storage-pool/test-volume-2.raw'/>
    <target dev='vdb' bus='virtio'/>
    <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
</disk>
...

4. Restart the virtual machine, it should not detect any difference.

5. Optional: Delete the original storage volume from the pool with virsh vol-delete. Note that virsh vol-delete will also delete the content of the underlying storage, not just removes the storage volume definition from the pool.

virsh vol-delete test-volume.img main-storage-pool