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• Checking there is enough free space usable on their tenant;

• Shutting down the VM;

• Clicking on the Bootable Volume, then on Extend Volume inside the right menu, writing there the desired new volume size;

• Rebooting the VM and check that the volume has the correct size, using the command df -h .

Download a VM

To download a VM, it is necessary to create a snapshot of it on the Openstack Dashboard, and then save locally the snapshot using the Command-line interface.

• Shutdown the VM

• Detach any secondary volume attached on the VM (remember the volume /dev/vda is the bootable volume from which the VM is loaded).

• Create the VM snapshot

  • If the VM is loaded from an image (there is no bootable volume  /dev/vda):

    • Click on create snapshot, and select format qcow2.

    • The snapshot should appear in the image list with size different from zero.

  • If the VM is loaded form a bootable volume (volume attached as /dev/vda):

    • Select the bootable volume,

    • Create a snapshot of the volume,

    • Create a volume from this snapshot.

    • From the new created volume, click on upload to image and then choose as disk format qcow2 . (this operation is slower than the other)

    • The snapshot should appear in the image list with size different from zero.

• Now from the CLI:

  • Setup the environment

  • Search the snapshot image created earlier, and get the Image ID

    Code Block
    language bash
    openstack image list

• • Save the image on local hardware

    Code Block
    language bash
    openstack image save --file <img_file_name> <image_snapshot_ID>

  • Check the downloaded image info to be sure the process has been executed correctly

    Code Block
    language bash
    qemu-img info <img_file_name>

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