need /lib/modules dir in images (-root.tgz , -root.txz)

[Scott Moser]

I was playing with using the lxd image converted to squashfs as a root filesystem to be booted on a real system (not in lxc or lxd).
I grabbed a kernel and initramfs from maas ephemeral images, and boot mostly worked.

However, cloud-initramfs-copymods will not work if /lib/modules isn't present in the image.
cloud-initramfs-copymods ensures that the modules in the initramfs are availble after boot in /lib/modules/<kver>

It does this by creating a tmpfs mount over /lib/modules and moving the initramfs /lib/modules to there.

However, to do that it needs the /lib/modules mount point to exist in the read-only (at that point) root filesystem.

So, long story short, I'm asking for creation of an empty /lib/modules directory in the lxd/lxc images.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1501843/+editstatus and add the package name in the text box next to the word Package.

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[Ben Howard (darkmuggle-deactivatedaccount)]

This was fix released a bit ago.
ben@prongs:~/tmp$ wget https://cloud-images.ubuntu.com/xenial/current/xenial-server-cloudimg-amd64.squashfs
ben@prongs:~/tmp$ sudo mount -o loop xenial-server-cloudimg-amd64.squashfs /mnt
ben@prongs:~/tmp$ stat /mnt/lib/modules
  File: '/mnt/lib/modules'
  Size: 3 Blocks: 0 IO Block: 1024 directory
Device: 700h/1792d Inode: 2056 Links: 2
Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2016-03-19 08:22:05.000000000 -0600
Modify: 2016-03-19 08:22:05.000000000 -0600
Change: 2016-03-19 08:22:05.000000000 -0600
 Birth: -

[Ben Howard (darkmuggle-deactivatedaccount)]

Please note that comment #2 uses the squashfs download which is generated the same way as the tar.gz files.