Description of problem: virt-sysprep option '--mount-options' don't work well. Version-Release number of selected component (if applicable): libguestfs-1.27.39-1.1.el7 How reproducible: 100% Steps to Reproduce: 1. Create a raw format guest image: rhel6.6.img 2. Start the guest, and check in the guest: # cat /etc/fstab /dev/mapper/VolGroup-lv_root / ext4 defaults 1 1 ..... # mount | grep root /dev/mapper/VolGroup-lv_root on / type ext4 (rw) 3. #virt-sysprep --mount-options "/:noatime" -a rhel6.6.img 4. Start the guest, check in the guest: # cat /etc/fstab /dev/mapper/VolGroup-lv_root / ext4 defaults 1 1 ..... # mount | grep root /dev/mapper/VolGroup-lv_root on / type ext4 (rw) Actual results: The mount option field is still default in file /etc/fstab and in the output of 'mount | grep root' Expected results: The mount option field should be noatime in file /etc/fstab and in the output of 'mount | grep root', like(I assume that --mount-options implement this function by change file /etc/fstab): # cat /etc/fstab /dev/mapper/VolGroup-lv_root / ext4 noatime 1 1 ..... # mount | grep root /dev/mapper/VolGroup-lv_root on / type ext4 (rw,noatime) Additional info:
I guess the documentation is a bit unclear. --mount-options has no effect in the disk image. It's simply to allow you to specify mount options for libguestfs when it opens the disk image (mainly to support FreeBSD guests). I have added this commit to clarify the documentation: https://github.com/libguestfs/libguestfs/commit/f722571c73d427530a357b7a864a5432cc7db461 This will appear in libguestfs >= 1.27.48.
(In reply to Richard W.M. Jones from comment #2) > This will appear in libguestfs >= 1.27.48. I've added the patch on top of 1.27.47 in RHEL 7.1, so you should see an improved man page in libguestfs-1.27.47-1.1.el7.
Verified with libguestfs-1.28.1-1.2.el7 Can find the following line in man virt-sysprep: --mount-options mp:opts[;mp:opts;...] Set the mount options used when libguestfs opens the disk image. Note this has no effect on the guest. It is used when opening certain guests such as ones using the UFS (BSD) filesystem. Use a semicolon-separated list of "mountpoint:options" pairs. You may need to quote this list to protect it from the shell. For example: ......
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. https://rhn.redhat.com/errata/RHBA-2015-0303.html