Bug 712819

Summary:	vncserver overriding qemu-kvm configuration
Product:	Red Hat Enterprise Linux 6	Reporter:	Jean-Pierre Pitout <jpitout>
Component:	qemu-kvm	Assignee:	Gerd Hoffmann <kraxel>
Status:	CLOSED NOTABUG	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	6.0	CC:	juzhang, mkenneth, tburke, virt-maint
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-06-20 07:10:16 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Jean-Pierre Pitout 2011-06-13 09:39:12 UTC

Description of problem:



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

When you configure a VNC server in /etc/sysconfig/vncservers and specify the "-nolisten tcp" as an argument for vncserver it will cause qemu-kvm to ignore the  <graphics type='vnc' port='1' autoport='no' listen='0.0.0.0'> in /etc/libvirt/qemu/vm-server.xml

How reproducible:

Always.


Steps to Reproduce:
1. Configure a vnc connection with "-nolisten tcp" in /etc/sysconfig/vncservers
2. Configure /etc/libvirt/qemu/<your-vm>.xml with <graphics type='vnc' port='5901' autoport='no' listen='0.0.0.0'>
3. Restart VM.
4. netstat -ntlp | grep qemu-kvm
  
Actual results:

qemu-kvm ignores <graphics type='vnc' port='5901' autoport='no' listen='0.0.0.0'>

Expected results:

qemu-kvm adheres to <graphics type='vnc' port='5901' autoport='no' listen='0.0.0.0'>

Additional info:

Let me start by saying I am aware that the default/correct way of connecting to a VNC server. 

Which would be via a ssh tunnel to localhost. (ie vncviewer -via root@blah localhost:1). 

I speculate that this bug may be by design, but I have 2 issues with this:

1. I haven't been able to find any documentation about this behavior, which causes a lot of time to be wasted doing troubleshooting.

2. You cannot get granular with the configuration. Say you want to allow X connections to qemu-kvm, but not to vncserver, you cannot. You are forced into a one-size-fits-all scenario.

Comment 2 Gerd Hoffmann 2011-06-15 14:09:17 UTC

Please attach a copy of /etc/sysconfig/vncservers

What is the output of the netstat command in step (4)?

What is the output you expect to see?

What is the output of "netstat -ntlp | grep 590" ?

Comment 3 Jean-Pierre Pitout 2011-06-18 08:42:08 UTC

I do apologize, I must have been mistaken as I cannot replicate this anymore. 

I suspect I was editig /var/run/libvirt/qemu/vm-server.xml instead of /etc/libvirt/qemu/vm-server.xml, probably a lack of coffee.

Please ignore this bug until further notice.

Kind regards and apologies,
Jean-Pierre Pitout

Comment 4 Gerd Hoffmann 2011-06-20 07:10:16 UTC

/me suggests "virsh edit vm-server" ;)