On Tue, Jun 15, 2021 at 03:22:23PM +0300, Nir Soffer wrote: > On Sun, Jun 13, 2021 at 1:38 PM Richard W.M. Jones <[email protected]> wrote: > > > > On Sat, Jun 12, 2021 at 11:11:22PM +0300, Nir Soffer wrote: > > > I'm running this inside a fedora 34 container in ovirt-imageio CI: > > > > > > 'virt-builder', '-v', '-x', 'cirros-0.3.5', '--write', > > > '/etc/cirros-init/config:DATASOURCE_LIST="nocloud"', > > > '--root-password', 'password:', '-o', > > > '/var/tmp/imageio-images/cirros-0.3.5' > > > > > > The command fails in: > > > > > > supermin: ext2: copying kernel modules > > > supermin: ext2: creating minimal initrd > > > '/var/tmp/.guestfs-0/appliance.d.t7nny0l7/initrd' > > > supermin: exception: > > > Sys_error("/lib/modules/5.12.9-300.fc34.x86_64/modules.dep: No such > > > file or directory") > > > > We use this file in order to construct the minimal initrd with some > > virtio modules, which is sufficient to bring up the supermin root > > filesystem. The file itself is used to calculate the correct set of > > module dependencies (so that, for example, if a virtio kmod needs > > another kmod then the other kmod will be pulled in). See: > > Is it correct to use /lib/modules/kernel-X/modules.dep > when the file was created on the system building the container > while running the container on kernel-Y?
Yes, because libguestfs runs the kernel from /boot + /lib/modules on top of qemu. It doesn't use the host kernel. > For example, we build the container in quay.io (no idea which kernel) > and run the container in travis (Ubuntu xenial, kernel 5.4), or locally > (Fedora 32, kernel 5.11). > > Should virt builder/supermin use "demod --show" to generate a temporary > modules.dep, instead of depending on system modules.dep when running > in a container? It's not clear to me where depmod --show gets its information from. The host kernel? Anyway, possibly ... but correctly built guests have modules.dep so it's not been a problem until now. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/ _______________________________________________ Libguestfs mailing list [email protected] https://listman.redhat.com/mailman/listinfo/libguestfs
