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Description of problem: In libguestfs 1.18 we added useful new APIs which expose FUSE, so that programs don't need to use the external guestmount program in order to make guest filesystem directories appear mounted locally. https://rwmj.wordpress.com/2012/03/29/libguestfs-mount-local/ https://rwmj.wordpress.com/2012/05/14/tip-using-mount-local-api-from-c/ https://github.com/libguestfs/libguestfs/blob/master/examples/mount_local.c Currently OpenStack uses guestmount directly, but this is problematic, see eg: https://www.redhat.com/archives/libguestfs/2012-June/msg00021.html https://www.redhat.com/archives/libguestfs/2012-June/msg00020.html These kinds of problems could be solved easily if OpenStack could use a more recent version of libguestfs which supported the mount-local API. However because RHEL 6.3 libguestfs is version 1.16, it doesn't have this API, effectively preventing us from contributing such a patch upstream. Therefore it would make sense for us either to rebase libguestfs to 1.18, or to backport the 3 mount-local APIs to libguestfs 1.16, for RHEL 6.4. Note that Fedora >= 17 has libguestfs 1.18.
Note this should only be an issue when nova is _creating_ the authorized_keys file. A workaround would be to create an empty file with appropriate selinux labels in the guest image. Also guestmount supports passing mount options when using a specific partition, so if the guest image(s) have a simple layout, a specific partition to inject to can be configured, and in this mode nova could be modified to pass the appropriate options. It's not been tested whether SElinux labels can be updated in this way.
Bug 832511 would be helped by this.
libguestfs-1.16.32-3.el6 have run some basic test for mount-local api with the following test script(https://github.com/libguestfs/libguestfs/blob/master/examples/mount_local.c), more detail test will be done later, [root@station2 tmp]# ./mount_local disk.img This is the 'mount-local' demonstration program. Follow the instructions on screen. Creating and formatting the disk image, please wait a moment ... The _current directory_ is a FUSE filesystem backed by the disk image which is managed by libguestfs. Any files or directories you copy into here (up to 512 MB) will be saved into the disk image. You can also delete files, create certain special files and so on. When you have finished adding files, hit ^D or exit to exit the shell and return to the mount-local program. mount-local-shell> touch mount_local.c mount-local-shell> touch this_is_mount_local_test mount-local-shell> exit [root@station2 tmp]# guestfish -a disk.img -m /dev/sda1 ><fs> ls / PUT_FILES_AND_DIRECTORIES_HERE lost+found mount_local.c this_is_mount_local_test
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2013-0324.html