Bug 1144155

Summary:	Need no_timer_check in RHEL 7 cloud image
Product:	Red Hat Enterprise Linux 7	Reporter:	Ben Nemec <bnemec>
Component:	rhel-guest-image	Assignee:	Ryan Barry <rbarry>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	7.0	CC:	dgregor, fdeutsch, gfidente, jgreguske, jherrman, rbarry, tlavigne, yuliu
Target Milestone:	rc
Target Release:	7.1
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	Previously, if a guest image was run inside a nested virtual machine, the image automatically searched for a timing device. Consequently, the guest image sometimes became unresponsive when booting. With this update, the guest image is configured with the "no_timer_check" option, and now boots successfully in nested environments.	Story Points:	---
Clone Of:
Clones:	1147035 (view as bug list)		Environment:
Last Closed:	2015-03-06 17:54:06 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:
Bug Depends On:
Bug Blocks:	1147035

Description Ben Nemec 2014-09-18 19:36:16 UTC

Description of problem: RHEL 7 cloud image hangs at boot when running nested.


Version-Release number of selected component (if applicable): rhel-guest-image-7.0-20140618.1.x86_64.qcow2


How reproducible: (Almost?) always.  I haven't had any success with this, but my understanding is that it doesn't fail 100% of the time.


Steps to Reproduce:
1. Boot a RHEL 7 vm using kvm
2. Attempt to boot a nested RHEL 7 vm using qemu inside the first vm

Actual results: Nested guest hangs at "...trying to set up timer as Virtual Wire IRQ..."


Expected results: Nested guest boots successfully


Additional info: The Fedora image with no_timer_check linked in https://bugzilla.redhat.com/show_bug.cgi?id=1082030 fixes this problem.  I believe the same fix should be applied to the RHEL 7 image.

Comment 2 yuliu 2014-09-23 03:35:18 UTC

Is this required for RHEL image 6? If so, please clone it to guest-image-6.

Comment 3 Charles Crouch 2014-09-26 16:15:36 UTC

That's a good point yuliu. This came up in our testing of OpenStack TripleO which we're only supporting for deployment onto RHEL7. But since this is a guest image issue, it would be nice to be able the run RHEL6 guest too.

Comment 4 Ben Nemec 2014-10-14 15:02:13 UTC

*** Bug 1152578 has been marked as a duplicate of this bug. ***

Comment 6 yuliu 2015-01-27 05:29:40 UTC

Version: rhel-guest-image-7.1-20150116.0

# cat /etc/grub2.cfg  |grep linux
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Red Hat Enterprise Linux Server 7.1 (Maipo), with Linux 3.10.0-223.el7.x86_64' --class fedora --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-223.el7.x86_64-advanced-b12636ea-0c7b-449f-a9da-169148783564' {
	linux16 /boot/vmlinuz-3.10.0-223.el7.x86_64 root=UUID=b12636ea-0c7b-449f-a9da-169148783564 ro crashkernel=auto console=tty0 console=ttyS0,115200n8 no_timer_check net.ifnames=0 LANG=en_US.UTF-8
...


Has "no_timer_check" in kernel command.
Verified as above.

Comment 8 errata-xmlrpc 2015-03-06 17:54:06 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://rhn.redhat.com/errata/RHBA-2015-0648.html