Re: [Libguestfs] virt-builder resize error

On Tue, Nov 21, 2017 at 3:55 AM, Pino Toscano <ptoscano(a)redhat.com&gt; wrote: > Hi, > > On Monday, 20 November 2017 22:57:04 CET David Kaylor wrote: > > I was trying out virt-builder and noticed that in some directories I > > receive an error when the image is resized. > > > > For example, if I run the following command from my home directory it > works > > fine: > > > > virt-builder rhel-7.4 --size 10G --output test.img > > > > If I run the same command from /tmp or /vms (my default libvirt pool), I > > see the following in my verbose output: > > > > virt-resize '--verbose' '--format' 'raw' '--output-format' 'raw' > '--expand' > > '/dev/sda3' '--unknown-filesystems' 'error' 'test.img' 'test.img' > > command line: virt-resize --verbose --format raw --output-format raw > > --expand /dev/sda3 --unknown-filesystems error test.img test.img > > virt-resize: error: you cannot use the same disk image for input and > output > > > > Am I doing something wrong or is this possibly a bug? The host I am > running > > virt-builder on is Fedora 27. > > The only thing it comes into my mind is that there is already a file > called "test.img" in the directories where it fails. > > Can you please check that, and provide also a full log virt-builder > with -v -x? > > Thanks, > -- > Pino Toscano Thanks, Pino. Attached is the requested log. A few other observations: In most directories, I can run the command successfully whether a file of the same name is present or not. Looking at the verbose output, it appears that a randomly-generated name in /var/tmp is used for the indisk. Example: virt-resize --verbose --format raw --output-format raw --expand /dev/sda3 --unknown-filesystems error /var/tmp/vbaf3053.img test.img For directories where it fails, both the indisk and outdisk are the same: virt-resize --verbose --format raw --output-format raw --expand /dev/sda3 --unknown-filesystems error test.img test.img