Red Hat Bugzilla – Bug 1366456
Converting rhel7 host installed on RAID:warning: fstrim: fstrim: /sysroot/: the discard operation is not supported
Last modified: 2016-11-03 14:03:35 EDT
Created attachment 1190247 [details] Detailed log info from virt-v2v Description of problem: The below warning shows when converting a host installed on RAID. warning: fstrim: fstrim: /sysroot/: the discard operation is not supported Version-Release number of selected component (if applicable): libguestfs-1.32.6-5.el7 virt-v2v-1.32.6-5.el7 virt-p2v-1.32.6-5.el7 How reproducible: 100% Steps to Reproduce: 1.Install a host on RAID,which are contains with 3 disks,the os is rhel7.2. # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 298.1G 0 disk ├─sda1 8:1 0 1.3G 0 part │ └─rhel-swap 253:0 0 3.9G 0 lvm [SWAP] └─sda2 8:2 0 296.8G 0 part └─md127 9:127 0 593.6G 0 raid5 / sdb 8:16 0 298.1G 0 disk ├─sdb1 8:17 0 1.3G 0 part │ └─rhel-swap 253:0 0 3.9G 0 lvm [SWAP] └─sdb2 8:18 0 296.8G 0 part └─md127 9:127 0 593.6G 0 raid5 / sdc 8:32 0 298.1G 0 disk ├─sdc1 8:33 0 1.3G 0 part │ └─rhel-swap 253:0 0 3.9G 0 lvm [SWAP] └─sdc2 8:34 0 296.8G 0 part └─md127 9:127 0 593.6G 0 raid5 / 2.Use virt-p2v to convert the host. Warning shows as below: warning: fstrim: fstrim: /sysroot/: the discard operation is not supported warning from log: commandrvf: mount -o /dev/md127 /sysroot/^M [ 284.419007] XFS (md127): Mounting V4 Filesystem^M [ 284.559791] XFS (md127): Ending clean mount^M libguestfs: trace: v2v: mount = 0 libguestfs: trace: v2v: fstrim "/" fstrim: /sysroot/: the discard operation is not supported^M guestfsd: error: fstrim: /sysroot/: the discard operation is not supported^M guestfsd: main_llibguestfs: trace: v2v: fstrim = -1 (error) libguestfs: trace: v2v: umount_all virt-v2v: warning: fstrim: fstrim: /sysroot/: the discard operation is not supported (ignored) Actual results: As above. Expected results: Improve the warning or just hide the warning from users,like bug 1168144. Additional info: Log priority,can move to rhel7.4
The warning is only emitted when in verbose mode (which was the precise fix for bug 1168144). The current code is: try g#fstrim "/" with G.Error msg -> (* Only emit this warning when debugging, because otherwise * it causes distress (RHBZ#1168144). *) if verbose () then warning (f_"%s (ignored)") msg If this warning is hidden when not verbose, then this is NOTABUG.
(In reply to Richard W.M. Jones from comment #2) > The warning is only emitted when in verbose mode (which was > the precise fix for bug 1168144). The current code is: > > try g#fstrim "/" > with G.Error msg -> > (* Only emit this warning when debugging, because otherwise > * it causes distress (RHBZ#1168144). > *) > if verbose () then > warning (f_"%s (ignored)") msg > > If this warning is hidden when not verbose, then this is NOTABUG. From https://bugzilla.redhat.com/show_bug.cgi?id=1167623#c12,"Enable server-side debugging" button is removed. So I just launch virt-p2v client and use the default configuration,the warning info shows just in the virt-p2v client.I think the info shows on virt-p2v client is not in debug mode,the log from virt-p2v server is in debug mode. Pls check the screenshot from virt-p2v client.
Created attachment 1190321 [details] screenshot from virt-p2v client
OK I see this is a virt-p2v transfer. Yes, debugging is always enabled "behind the scenes" now. This warning indicates a real problem. During any conversion the fstrim is used to reduce the amount of data that needs to be copied. If the fstrim cannot be done then conversion will run more slowly (in some cases much much more slowly). Perhaps we should always display the warning (reverting bug 1168144) but change the wording to make it clear what is happening.
Patches posted: https://www.redhat.com/archives/libguestfs/2016-August/thread.html#00087 Note this reverts the fix for bug 1168144. The warning is always enabled with these patches.
This warning also will be shown when convert rhel7.3-sata-uefi host to libvirt by virt-p2v
Upstream: https://github.com/libguestfs/libguestfs/commit/66816e11332b07a07efd6821e7ecf090691ce441 https://github.com/libguestfs/libguestfs/commit/dd22e376c4ec8fd7c78c78f94c60bb763ddcf08f
I can reproduce the bug as comment7 said Verify this bug with below builds: virt-v2v-1.32.7-2.el7.x86_64 libguestfs-1.32.7-2.el7.x86_64 virt-p2v-1.32.7-2.el7.x86_64 Steps: 1.Convert uefi guest from vmware to libvirt # virt-v2v -ic vpx://root@10.66.145.47/data/10.73.3.19/?no_verify=1 juzhou-test-efi -of qcow2 --password-file /tmp/passwd [ 0.0] Opening the source -i libvirt -ic vpx://root@10.66.145.47/data/10.73.3.19/?no_verify=1 juzhou-test-efi [ 0.8] Creating an overlay to protect the source from being modified [ 1.5] Initializing the target -o libvirt -os default [ 1.5] Opening the overlay [ 23.0] Inspecting the overlay [ 83.2] Checking for sufficient free disk space in the guest [ 83.2] Estimating space required on target for each disk [ 83.2] Converting Windows Server 2012 R2 Standard to run on KVM virt-v2v: warning: there is no QXL driver for this version of Windows (6.3 x86_64). virt-v2v looks for this driver in /usr/share/virtio-win The guest will be configured to use a basic VGA display driver. virt-v2v: This guest has virtio drivers installed. [ 93.4] Mapping filesystem data to avoid copying unused and blank areas virt-v2v: warning: fstrim on guest filesystem /dev/sda2 failed. Usually you can ignore this message. To find out more read "Trimming" in virt-v2v(1). Original message: fstrim: fstrim: /sysroot/: the discard operation is not supported [ 94.0] Closing the overlay [ 94.0] Checking if the guest needs BIOS or UEFI to boot virt-v2v: This guest requires UEFI on the target to boot. [ 94.0] Assigning disks to buses [ 94.0] Copying disk 1/1 to /var/lib/libvirt/images/juzhou-test-efi-sda (qcow2) (100.00/100%) [ 596.7] Creating output metadata Pool default refreshed Domain juzhou-test-efi defined from /tmp/v2vlibvirtb2b963.xml [ 597.1] Finishing off 2.Convert rhel7.3-sata-uefi host to libvirt by virt-p2v, the warning about fstrim shows as step1 Hi rjones, Why need to reserve original message: fstrim: fstrim: /sysroot/: the discard operation is not supported in warning? Thanks
I don't want to lose the original error message. It might be something important.
According to comment 10 and comment 11, move this bug from ON_QA to VERIFIED
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/RHSA-2016-2576.html