Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 1453194

Summary:	Guest with 247-characters name-length failed to start
Product:	Red Hat Enterprise Linux 7	Reporter:	Fangge Jin <fjin>
Component:	libvirt	Assignee:	Martin Kletzander <mkletzan>
Status:	CLOSED ERRATA	QA Contact:	Fangge Jin <fjin>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.4	CC:	dyuan, jsuchane, lizhu, rbalakri, xuzhang, yafu, yanqzhan, zpeng
Target Milestone:	rc	Keywords:	Regression, Upstream
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	libvirt-3.7.0-1.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-04-10 10:44:33 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Fangge Jin 2017-05-22 11:22:46 UTC

Description of problem:
Guest with 248-characters name-length failed to start

Version-Release number of selected component:
libvirt-3.2.0-5.virtcov.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Prepare a guest with 248-characters name-length:
# virsh list --all
 Id    Name                           State
----------------------------------------------------
 -     1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 shut off

2. Start guest:
# virsh start 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
error: Failed to start domain 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
error: internal error: Process exited prior to exec: libvirt: QEMU Driver error : Failed to create /var/run/libvirt/qemu/1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111.hugepages: File name too long

3.An empty dir $guest.dev is left in /var/lib/libvirt/qemu/
# ls /var/run/libvirt/qemu/
1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111.dev

Actual results:
Guest failed to start

Expected results:
Guest can start successfully.

Additional info:
Same guest can start successfully on RHEL7.3

Comment 3 Martin Kletzander 2017-08-23 11:56:26 UTC

Patch proposed upstream:

https://www.redhat.com/archives/libvir-list/2017-August/msg00635.html

Comment 4 Martin Kletzander 2017-08-29 09:27:53 UTC

Fixed upstream with v3.6.0-230-gf5ef291bdb2c:
commit f5ef291bdb2c7616f342efc20e2322e48c038eca
Author: Martin Kletzander <mkletzan>
Date:   Wed Aug 23 10:39:57 2017 +0200

    qemu: Use short domain name in qemuDomainGetPreservedMountPath

Comment 6 Fangge Jin 2017-10-24 03:08:03 UTC

Verify with libvirt-3.8.0-1.virtcov.el7.x86_64, guest starts successfully with the long name

Comment 10 errata-xmlrpc 2018-04-10 10:44:33 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, 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/RHEA-2018:0704