Bug 433451
| Summary: | Can't start second guest via virt-manager while using shared block devices | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Adam Stokes <astokes> |
| Component: | libvirt | Assignee: | Daniel Veillard <veillard> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | 5.2 | CC: | tao, xen-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | RHBA-2008-0291 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2008-05-21 16:48:05 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. This was fixed upstream in November I think:
Wed Nov 21 17:29:42 CET 2007 Daniel Veillard <veillard>
* src/xm_internal.c: fix the parsing of predefined domains on
xen prior to 3.1 to take into accound the fact that disk can
be shareable.
That patch is included in the rebase for RHEL-5.2 as patch
libvirt-0.3.3-disk-shareable.patch
So yes the fix for 5.2 is in libvirt-0.3.3.5.el5 (as well as many other
fixes). So this will go in update 2.
Daniel
Set dev ack as a rebase of libvirt in RHEL 5.2 has fixed this issue. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2008-0291.html |
Description of problem: If I share a block device to use with multiple guests using w!, starting the second guest via virt-manager throws trace back error and fails. Starting the second guest via "xm create <guest2>" works fine without any problems. Version of packages: xen-3.0.3-41.el5 kernel-xen-2.6.18-53.1.4.el5 xen-libs-3.0.3-41.el5 xen-libs-3.0.3-41.el5 python-virtinst-0.103.0-3.el5_1.1 libvirt-0.2.3-9.el5 virt-manager-0.4.0-3.el5 How reproducible: Always. Steps to Reproduce: - Create two para virtualized guests. I have not yet tested this with full virt. - Create a block device. Either a logical volume or block device (sdax or hdax etc..) - Add the block device to both guests and add w! to make it shared. Configuration file from both guests. name = "guest1" uuid = "de7b25c7-6f4c-26e0-af31-c2e07b05e3ed" maxmem = 500 memory = 500 vcpus = 1 bootloader = "/usr/bin/pygrub" on_poweroff = "destroy" on_reboot = "restart" on_crash = "restart" vfb = [ "type=vnc,vncunused=1,keymap=en-us" ] disk = [ "tap:aio:/vm/guest1.img,xvda,w", "phy:/dev/sda9,xvdb,w!"] vif = [ "mac=00:16:3e:47:aa:a4,bridge=xenbr0" ] name = "guest2" uuid = "8493c330-f15d-4b33-9909-16a210b83fd9" maxmem = 500 memory = 500 vcpus = 1 bootloader = "/usr/bin/pygrub" on_poweroff = "destroy" on_reboot = "restart" on_crash = "restart" vfb = [ "type=vnc,vncunused=1,keymap=en-us" ] disk = [ "tap:aio:/vm/guest2.img,xvda,w", "phy:/dev/sda9,xvdb,w!" ] vif = [ "mac=00:16:3e:47:aa:a5,bridge=xenbr0" ] - Start the guest1 from virt-manager. It would start successfully. - Then start the second guest from virt-manager. You would see the below error message. libvir: Xen Daemon error : POST operation failed: (xend.err 'Device 51728 (vbd) could not be connected.nDevice /dev/sda9 is mounted in a guest domain,nand so cannot be mounted now.') Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/manager.py", line 693, in start_vm vm.startup() File "/usr/share/virt-manager/virtManager/domain.py", line 375, in startup self.vm.create() File "/usr/lib64/python2.4/site-packages/libvirt.py", line 217, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirt.libvirtError: virDomainCreate() failed POST operation failed: (xend.err 'Device 51728 (vbd) could not be connected.nDevice /dev/sda9 is mounted in a guest domain,nand so cannot be mounted now.') Actual results: Second guest start up fails through virt-manager. Expected results: Second guest start up should be successful via-virt manager. Additional info: If we start the second guest via "xm create guest2" it starts successfully and attaches the shared block device without any problems to the second guest. [root@dhcp6-7 xen]# xm create guest2 Using config file "./guest2". Started domain guest2 - If you use a file backed image and share them between two guests using w! flag, we can stat both guests from virt-manager without any prorblems. Problem seems to be only while sharing block device. -- Please note this is fixed in libvirt 0.3.3.5.el5