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Bug 1492208 - Failed to switch root: Specified switch root path /sysroot does not seem to be an OS tree. os-release file is missing
Summary: Failed to switch root: Specified switch root path /sysroot does not seem to b...
Keywords:
Status: CLOSED DUPLICATE of bug 1488527
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: redhat-release
Version: 7.5
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Lubos Kocman
QA Contact: Release Test Team
URL:
Whiteboard:
: 1491957 (view as bug list)
Depends On:
Blocks: 1469559
TreeView+ depends on / blocked
 
Reported: 2017-09-15 19:14 UTC by Steve Dickson
Modified: 2023-09-07 18:58 UTC (History)
13 users (show)

Fixed In Version: redhat-release-7.5-0.5.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-11-06 09:18:09 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELBLD-13656 0 None None None 2023-09-07 18:58:54 UTC

Internal Links: 1708845

Description Steve Dickson 2017-09-15 19:14:49 UTC 
Description of problem:
Updated to today RHEL7 nightly and I get the following errors
when booting

systemd[1]: Starting Switch Root...
systemctl[445]: Failed to switch root: Specified switch root path /sysroot does not seem to be an OS tree. os-release file is missing.
systemd[1]: initrd-switch-root.service: main process exited, code=exited, status=1/FAILURE
systemd[1]: Failed to start Switch Root.
systemd[1]: Startup finished in 595ms (kernel) + 0 (initrd) + 1.354s (userspace) = 1.950s.
systemd[1]: Unit initrd-switch-root.service entered failed state.
systemd[1]: Triggering OnFailure= dependencies of initrd-switch-root.service.
systemd[1]: initrd-switch-root.service failed.
systemd[1]: Started Emergency Shell.

The repo I used was

http://download.lab.bos.redhat.com/rel-eng/latest-RHEL-7/compose/Server/x86_64/os which contains version

 systemd-219-42.el7.x86_64.rpm    


How reproducible:
%100...
Comment 2 Jeff Bastian 2017-09-15 20:12:44 UTC 
I just did a fresh install of RHEL-7.5-20170914.n.0 Server x86_64 which includes systemd-219-44.el7.x86_64 and it worked fine.  I rebooted the system a few times and it came fine each time.

https://beaker.engineering.redhat.com/recipes/4268331
Comment 3 Jeff Bastian 2017-09-15 20:14:03 UTC 
For the record:
/mnt/redhat/rel-eng/latest-RHEL-7 -> RHEL-7.4-20170711.0
Comment 4 Jeff Bastian 2017-09-15 20:25:04 UTC 
I was able to reproduce this by removing the os-release symlinks and files. 

[root@localhost ~]# ls -l /etc/os-release 
lrwxrwxrwx. 1 root root 21 Sep 15 15:54 /etc/os-release -> ../usr/lib/os-release

[root@localhost ~]# ls -l /usr/lib/os-release 
lrwxrwxrwx. 1 root root 28 Sep 15 15:54 /usr/lib/os-release -> os.release.d/os-release-rhel

[root@localhost ~]# rm -f /etc/os-release \
                          /usr/lib/os-release \
                          /usr/lib/os.release.d/os-release-rhel

[root@localhost ~]# reboot
...
...
[    4.910424] localhost.localdomain systemd[1]: Starting Switch Root...
[    4.916397] localhost.localdomain systemctl[463]: Failed to switch root: Specified switch root path /sysroot does not seem to be an OS tree. os-release file is missing.
[    4.917405] localhost.localdomain systemd[1]: initrd-switch-root.service: main process exited, code=exited, status=1/FAILURE


Do you know how your os-release file disappeared?
Comment 5 Jeff Bastian 2017-09-15 20:35:06 UTC 
The symlinks seem to be new thing for RHEL 7.5
  /etc/os-release -> /usr/lib/os-release -> os.release.d/os-release-rhel

RHEL 7.4 /etc/os-release is just a plain file
Comment 6 Scott Dodson 2017-09-16 02:30:24 UTC 
dupe of https://bugzilla.redhat.com/show_bug.cgi?id=1491957 ?
Comment 7 Steve Dickson 2017-09-16 12:27:31 UTC 
(In reply to Jeff Bastian from comment #5)
> The symlinks seem to be new thing for RHEL 7.5
>   /etc/os-release -> /usr/lib/os-release -> os.release.d/os-release-rhel
> 
> RHEL 7.4 /etc/os-release is just a plain file

Yes... /etc/os-release is a symlink but to .. 

:/# ls -ld /etc/os-release
lrwxrwxrwx 1 root 0 2 Sep 15 13:27 /etc/os-release -> ..

and there is no /usr/lib/os-release

:/# ls /usr/lib/os-release
ls: cannot access /usr/lib/os-release: No such file or directory

So this must be the problem... change component to
 redhat-release-server
Comment 8 Avesh Agarwal 2017-09-20 16:04:12 UTC 
I also ran into this issue when I upgraded one of VMs to 7.5 from 7.4 and the VM stopped booting with the same error.

As a work around, I mounted sysroot in write mode and created a symlink os-relead.d to os.release.d and the VM booted again.
Comment 9 Robert Peterson 2017-09-20 17:06:35 UTC 
I found comment #8 to be a bit cryptic, but it gave me enough
clues to get my machines working again. The exact commands I
pasted into the failed console are:

mount -o remount,rw /sysroot
cd /sysroot/usr/lib
ln -s os.release.d os-release.d   
exit
Comment 11 Lubos Kocman 2017-09-29 08:56:33 UTC 
*** Bug 1491957 has been marked as a duplicate of this bug. ***
Comment 13 Lubos Kocman 2017-09-29 13:03:53 UTC 
I believe it's related to migration of redhat-release-{variant} into redhat-release. There was a typo in /etc/os.release.d I hope if fixes your issue as well.

Lubos
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