Bug 1305900

Summary:	use different bus for cdrom when q35 chipset is used
Product:	[oVirt] ovirt-engine	Reporter:	Martin Polednik <mpoledni>
Component:	BLL.Virt	Assignee:	Shmuel Melamud <smelamud>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Shira Maximov <mshira>
Severity:	medium	Docs Contact:
Priority:	high
Version:	4.0.0	CC:	bgraveno, bugs, jiyan, kylinfedora, mavital, michal.skrivanek, mshira, sbonazzo, tjelinek
Target Milestone:	ovirt-4.0.0-beta	Flags:	rule-engine: ovirt-4.0.0+ rule-engine: planning_ack+ rule-engine: devel_ack+ rule-engine: testing_ack+
Target Release:	4.0.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:	Added the ability to configure different bus interfaces (IDE, SCSI, and SATA) for different virtual machine chipsets. By default, the SATA interface is used for the Q35 chipset.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-07-05 07:38:15 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	Virt	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1306586
Bug Blocks:	1301111, 1365938

Description Martin Polednik 2016-02-09 14:34:59 UTC

Engine currently uses IDE bus for all cdrom devices. That is fine for i440fx chipset, but not for q35. As we would like to move to q35 tech preview or even default at some point, different bus must be used (e.g. scsi, sata).

Comment 1 Red Hat Bugzilla Rules Engine 2016-02-09 14:49:39 UTC

Bug tickets must have version flags set prior to targeting them to a release. Please ask maintainer to set the correct version flags and only then set the target milestone.

Comment 2 Yaniv Kaul 2016-03-13 16:06:28 UTC

Moving to 4.1, as it looks like it'll be 7.3 based.

Comment 3 Michal Skrivanek 2016-03-31 05:00:00 UTC

*** Bug 1322248 has been marked as a duplicate of this bug. ***

Comment 4 Michal Skrivanek 2016-04-15 09:34:14 UTC

this is minor and more of a bug, blocking a possible tech preview during 4.0 lifecycle (there's no code on our side needed other than this fix AFAIK, so as soon as 7.3 is out we can semi-support q35...)
i'll trade it with another 4.0 bug and move back

Comment 5 Sandro Bonazzola 2016-05-02 09:47:36 UTC

Moving from 4.0 alpha to 4.0 beta since 4.0 alpha has been already released and bug is not ON_QA.

Comment 6 Shira Maximov 2016-06-09 11:28:26 UTC

verified on : 
oVirt Engine Version: 4.1.0-0.0.master.20160606111312.gitc7af584.el7.centos

verification steps: 
1. create VM with CD-rom 
2. change the emulated machine to q35 , and later for  pc-i440fx-rhel7.2.0
3. start the VM 
4. look at the VM devices 

For VM with q35 chipset - > SATA added 
For VM with i440fx chipset -> controller added.

Comment 7 Sandro Bonazzola 2016-07-05 07:38:15 UTC

oVirt 4.0.0 has been released, closing current release.

Comment 8 jiyan 2018-09-03 08:18:37 UTC

Hi, I tried related scenario.
When I boot a VM with i440fx+ide(cdrom), VM can start successfully.
After that, I edit the VM to 'q35' machine type, then VM can not start with the following error:
VM jiyan-1 is down with error. Exit message: unsupported configuration: IDE controllers are unsupported for this QEMU binary or machine type.

However, I can not find where to disable IDE controller in web UI. Could you please help to check this issue, thx very much.

Version:
server: rhvm-4.2.5.1-0.1.el7ev.noarch