Re: [Xen-users] hvm boot causing dom0 to crash

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Jul 20, 2010 at 09:32:34AM -0500, Mark Chaney wrote:
> Nothing had changed on the dom0 that I know of. Other guests on running  
> on that dom0 fine and its stable. Nothing happens until I try starting  
> that hvm. As far as the HVM, I had run aptitude update/upgrade on it,  
> but it the day before, but I had done that with the other debian hvm on  
> the other dom0 and its not having issues. =/
>

Set up a serial console and capture the hypervisor and kernel messages
when the crash happens:

http://wiki.xensource.com/xenwiki/XenSerialConsole

-- Pasi

> - Mark
>
> On 07/20/2010 07:30 AM, Pasi Kärkkäinen wrote:
>> On Tue, Jul 20, 2010 at 03:27:47AM -0500, Mark Chaney wrote:
>>    
>>> I am running Xen 3.4.3 on CentOS 5.5 x86_64, with kernel 
>>> 2.6.18-194.8.1.el5xen. My fully virtualized guest (HVM) is running Debian 5 
>>> with kernel 2.6.33 x86_64. The debian guest had been running for over 10 
>>> days with no issues until i rebooted it. Now every time i try to start up 
>>> the guest, the entire dom0 crashes and reboots. Whats odd is that I have a 
>>> very similar debian guest (used the same appliance iso) running on another 
>>> dom0 that is not having these same issues. They are at two different 
>>> locations, so I cant easily test the troublesome guest on a different dom0 
>>> and vice versa. This last time i tried to start the guest it seemed to go 
>>> almost through the boot processes, but then suddenly rebooted the guest and 
>>> it got all the way to the starting firewall part before it crashed the dom0.
>>>
>>> Below if the guests cfg if it helps:
>>>
>>> name = "mailcleaner_ent_mx2"
>>> maxmem = 4096
>>> memory = 1024
>>> vcpus = 2
>>> builder = "hvm"
>>> kernel = "/usr/lib/xen/boot/hvmloader"
>>> boot = "c"
>>> pae = 1
>>> acpi = 1
>>> apic = 1
>>> localtime = 0
>>> on_poweroff = "destroy"
>>> on_reboot = "restart"
>>> on_crash = "restart"
>>> device_model = "/usr/lib64/xen/bin/qemu-dm"
>>> vfb = [ "type=vnc,vncunused=1,keymap=en-us" ]
>>> disk = [ "phy:/dev/VolGroup00/mailcleaner_ent_mx2,hda,w", ",hdc:cdrom,r" ]
>>> vif = [ 
>>> "mac=00:16:36:47:cc:e3,bridge=eth0,script=vif-bridge,vifname=vif-1.0" ]
>>> parallel = "none"
>>> serial = "pty"
>>>
>>>
>>> Any ideas on what I should be looking for? I really need to get this guest 
>>> back up ASAP as its the secondary mx mail server that im testing and it has 
>>> some email on it already that I need to deliver to my test accounts.
>>>
>>>      
>> Did you change something in the guest when it started crashing? Or something 
>> in the dom0?
>> Are you sure your hardware is OK ?
>>
>> A guest should never crash host/hypervisor/dom0..
>>
>> -- Pasi
>>
>>
>>    
>
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