[Libguestfs] [PATCH v2 0/3] rhv-upload: Support import to qcow2 disk

[Nir Soffer]

Add support for qcow2 disk format, enabled by imageio NBD backend in RHV 4.3.
To use this feature manually, you can run virt-v2v with "-of qcow2".

Here is example run:

Source disk:

$ qemu-img info /var/tmp/fedora-30.img
image: /var/tmp/fedora-30.img
file format: raw
virtual size: 6 GiB (6442450944 bytes)
disk size: 1.15 GiB

virt-v2v:

$ ./run virt-v2v \
    -v \
    -i disk /var/tmp/fedora-30.img \
    -o rhv-upload \
    -oc https://engine/ovirt-engine/api \
    -op /var/tmp/engine-password \
    -on v2v \
    -os nfs1-export2 \
    -of qcow2 \
    -oa sparse \
    -oo rhv-cafile=/etc/pki/vdsm/certs/cacert.pem \
    -oo rhv-cluster=fc30 \
    -oo rhv-direct=true

...
[  71.2] Copying disk 1/1 to qemu URI json:{ "file.driver": "nbd", "file.path": "/home/nsoffer/src/virt-v2v/tmp/rhvupload.6EmoNE/nbdkit0.sock", "file.export": "/" } (qcow2)
             overlay file: /home/nsoffer/src/virt-v2v/tmp/v2vovl7fefa6.qcow2
      overlay device name: sda
overlay virtual disk size: 6442450944
  overlay source qemu URI: /var/tmp/fedora-30.img
    target estimated size: 2456662831
       target actual size: None

          target file: [qemu] json:{ "file.driver": "nbd", "file.path": "/home/nsoffer/src/virt-v2v/tmp/rhvupload.6EmoNE/nbdkit0.sock", "file.export": "/" }
        target format: qcow2
...
qemu-img 'convert' '-p' '-n' '-f' 'qcow2' '-O' 'raw' '-S' '64k' '/home/nsoffer/src/virt-v2v/tmp/v2vovl7fefa6.qcow2' 'json:{ "file.driver": "nbd", "file.path": "/home/nsoffer/src/virt-v2v/tmp/rhvupload.6EmoNE/nbdkit0.sock", "file.export": "/" }'
...

Target disk:

$ qemu-img info /rhev/data-center/82a445b6-b5e0-43c3-b761-cc6ef972e163/55255570-983a-4d82-907a-19b964abf7ed/images/f5325b5a-22e4-4a80-ad15-f68378c42dde/ab4587de-3ddf-4178-8cc0-1a09449c970d
image: /rhev/data-center/82a445b6-b5e0-43c3-b761-cc6ef972e163/55255570-983a-4d82-907a-19b964abf7ed/images/f5325b5a-22e4-4a80-ad15-f68378c42dde/ab4587de-3ddf-4178-8cc0-1a09449c970d
file format: qcow2
virtual size: 6 GiB (6442450944 bytes)
disk size: 1.17 GiB
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
    refcount bits: 16
    corrupt: false

Nir Soffer (3):
  rhv-upload: Log params for easier debugging
  v2v: Add output#tranfer_format method
  rhv-upload: Support qcow2 disk format

 v2v/output_rhv_upload.ml |  7 ++++---
 v2v/rhv-upload-plugin.py | 20 ++++++++++++++++++++
 v2v/types.ml             |  1 +
 v2v/types.mli            |  4 ++++
 v2v/v2v.ml               |  2 +-
 5 files changed, 30 insertions(+), 4 deletions(-)

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2.21.0