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

On Tuesday, 21 November 2017 15:36:02 CET David Kaylor wrote: > 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 Hmm... can you please paste the output of `findmnt --df`? In addition to that, do /tmp or /vms (mentioned above by you) have any special mount point (or free space)? What's the exact version of libguestfs? (`rpm -q libguestfs`) -- Pino Toscano

[ 2.9] Planning how to build this image 0: itags: +filename=/home/dkaylor/.cache/virt-builder/rhel-7.4.x86_64.2 +size=6442450944 +format=raw +template +xz 0: task : pxzcat 0: otags: +filename=test.img +size=6442450944 +format=raw 1: itags: +filename=test.img +size=6442450944 +format=raw 1: task : virt-resize 1: otags: +filename=test.img +size=8589934592 +format=raw