Bug 1910326

Summary:	Incorrect hostname returned by qga command 'guest-get-host-name'
Product:	Red Hat Enterprise Linux 8	Reporter:	dehanmeng <demeng>
Component:	qemu-kvm	Assignee:	Marc-Andre Lureau <marcandre.lureau>
qemu-kvm sub component:	Guest Agent	QA Contact:	dehanmeng <demeng>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	medium
Priority:	medium	CC:	fdeutsch, ipinto, jinzhao, juzhang, lbednar, mprivozn, virt-maint, vsibirsk
Version:	8.4	Keywords:	Triaged
Target Milestone:	rc	Flags:	pm-rhel: mirror+
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	qemu-kvm-4.2.0-40.module+el8.4.0+9278+dd53883d	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1845127	Environment:
Last Closed:	2021-05-18 15:22:59 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:	1845127
Bug Blocks:

Description dehanmeng 2020-12-23 13:14:13 UTC

+++ This bug was initially created as a clone of Bug #1845127 +++

Description of problem:
Incorrect hostname returned by virsh command

Version-Release number of selected component (if applicable):
qemu-kvm-4.2.0-38.module+el8.4.0+9133+5346b06d

How reproducible:
100%

Steps to Reproduce:
1. boot up guest and set new hostname.
2.Get VM hostname via qemu-guest-agent command 
{"execute": "guest-get-host-name"}'

3.Get hostname directly from guest os
[root@local~]hostname


Actual result:
on host:
{"execute":"guest-get-host-name"}
{"return": {"host-name": "oldtestname"}}
on guest:
[root@local~]hostname
newhostname

Expected result:
on host:
{"execute":"guest-get-host-name"}
{"return": {"host-name": "newtestname"}}
on guest:
[root@local~]hostname
newhostname

Comment 5 dehanmeng 2021-01-05 09:19:55 UTC

Reproduce with version :
qemu-kvm-4.2.0-38.module+el8.4.0+9133+5346b06d
RHEL-8.4.0-20201229.n.0 BaseOS x86_64

Steps to Reproduce：
1.Boot rhel840 guest successfully.
2.change hostname as "newhostname"
3.Get VM hostname via qemu-guest-agent command 
{"execute": "guest-get-host-name"}'
4.Get hostname directly from guest os

Actual result:
on host:
{"execute":"guest-get-host-name"}
{"return": {"host-name": "localhost.localdomain"}}
on guest:
[root@local~]hostname
newhostname

Expected result:
Hostname changed synchronization between host and guest.

Verified with version:
qemu-kvm-4.2.0-40.module+el8.4.0+9278+dd53883d
RHEL-8.4.0-20201229.n.0 BaseOS x86_64

Steps to verify like above
As above

Actual result:
on host:
{"execute":"guest-get-host-name"}
{"return": {"host-name": "newhostname"}}
on guest:
[root@local~]hostname
newhostname

Expected result:
Hostname changed synchronization between host and guest.

Comment 7 errata-xmlrpc 2021-05-18 15:22:59 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 (Moderate: virt:rhel and virt-devel:rhel security, 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/RHSA-2021:1762