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Bug 2166237 - systemd unmounts some file systems during boot because device is seen as "dead" for a short time
Summary: systemd unmounts some file systems during boot because device is seen as "dea...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: systemd
Version: 9.1
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: systemd-maint
QA Contact: Frantisek Sumsal
URL:
Whiteboard:
Depends On: 2138081
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-02-01 09:22 UTC by Renaud Métrich
Modified: 2023-05-09 10:34 UTC (History)
5 users (show)

Fixed In Version: systemd-252-3.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-05-09 08:22:21 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-147249 0 None None None 2023-02-01 09:25:00 UTC
Red Hat Product Errata RHBA-2023:2531 0 None None None 2023-05-09 08:22:48 UTC

Description Renaud Métrich 2023-02-01 09:22:33 UTC 
Description of problem:

We have a customer reporting that he repeatedly sees some of his file systems (/boot, /home) get mounted at boot, then unmounted automatically shortly after.

Troubleshooting showed that the corresponding devices were seen as "dead" for a short time, causing the systemd logic to unmount the file systems:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
$ egrep -w "(md124|Switching|/home)" sos_commands/logs/journalctl_--no-pager_--catalog_--boot
[...]
Jan 27 22:26:18 ... systemd[1]: dev-md124.device: Changed dead -> plugged
Jan 27 22:26:18 ... systemd[1]: sys-devices-virtual-block-md124.device: Changed dead -> plugged
Jan 27 22:26:19 ... systemd[1]: sys-devices-virtual-block-md124.device: Changed dead -> plugged
Jan 27 22:26:19 ... systemd[1]: dev-md124.device: Changed dead -> plugged
[...]
Jan 27 22:26:19 ... systemctl[1208]: Switching root - root: /sysroot; init: n/a
Jan 27 22:26:19 ... systemd[1]: Switching root.
[...]
Jan 27 22:26:21 ... systemd-tmpfiles[1254]: Entry "/home" does not match any include prefix, skipping.
Jan 27 22:26:22 ... systemd[1]: home.mount: About to execute /usr/bin/mount /dev/disk/by-label/role /home -t xfs
Jan 27 22:26:22 ... systemd[1]: Mounting /home...
Jan 27 22:26:22 ... systemd[1255]: home.mount: Executing: /usr/bin/mount /dev/disk/by-label/role /home -t xfs
Jan 27 22:26:22 ... kernel: XFS (md124): Mounting V5 Filesystem
Jan 27 22:26:22 ... kernel: XFS (md124): Ending clean mount
[...]
Jan 27 22:26:25 ... systemd[1]: Unit blockdev has alias blockdev@.target.
Jan 27 22:26:25 ... systemd[1]: sys-devices-virtual-block-md124.device: Changed dead -> plugged
Jan 27 22:26:25 ... systemd[1]: dev-md124.device: Changed dead -> plugged
Jan 27 22:26:25 ... systemd[1]: sys-devices-virtual-block-md124.device: Changed plugged -> dead
Jan 27 22:26:25 ... systemd[1]: dev-md124.device: Changed plugged -> dead

---> HERE IT'S DEAD, CAUSING THE UNMOUNT TO HAPPEN

Jan 27 22:26:25 ... systemd[1]: sys-devices-virtual-block-md124.device: Collecting.
Jan 27 22:26:25 ... systemd[1]: dev-md124.device: Changed dead -> plugged
Jan 27 22:26:25 ... systemd[1]: sys-devices-virtual-block-md124.device: Changed dead -> plugged
Jan 27 22:26:25 ... systemd[1]: home.mount: About to execute /usr/bin/umount /home -c
Jan 27 22:26:25 ... systemd[1]: Unmounting /home...
Jan 27 22:26:25 ... systemd[1702]: home.mount: Executing: /usr/bin/umount /home -c
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

We can even see in some cases a Partition "going away", which is unlikely to happen at all:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
Jan 27 22:26:25 ... systemd[1]: Invoking unit catchup() handlers…
Jan 27 22:26:25 ... systemd[1]: dev-disk-by\x2did-ata\x2dDISK_ID\x2dpart7.device: Changed plugged -> dead
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

We found out that this issue was known Upstream (https://github.com/systemd/systemd/issues/26254) and was fixed by 3 commits:

75d7b59
cf1ac0c
4fc69e8

Version-Release number of selected component (if applicable):

systemd-250-12.el9_1.x86_64

How reproducible:

Regularly on customer systems when deploying nodes from a template, couldn't reproduce internally.

Additional info:

I delivered a test package to the customer with these 3 fixes and customer confirmed it solved the issue.
Comment 2 David Tardon 2023-02-01 15:03:07 UTC 
> We found out that this issue was known Upstream
> (https://github.com/systemd/systemd/issues/26254) and was fixed by 3 commits:
> 
> 75d7b59
> cf1ac0c
> 4fc69e8

These commits are part of either systemd 251 or 252, hence this bug should be already fixed by rebase to 252.
Comment 3 Anish Bhatt 2023-02-01 19:10:34 UTC 
David, would that be expected as part of RHEL 9.2 or earlier/later ?
Comment 4 David Tardon 2023-02-02 07:15:00 UTC 
(In reply to Anish Bhatt from comment #3)
> David, would that be expected as part of RHEL 9.2 or earlier/later ?

9.2
Comment 14 errata-xmlrpc 2023-05-09 08:22:21 UTC 
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 (systemd bug fix and enhancement update), 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://access.redhat.com/errata/RHBA-2023:2531
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