Re: [Xen-users] PV on Centos 5 64-bit

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

Jens-Petter Salvesen wrote:
> Hi,
>  
> I'm having a very difficult time getting paravirtualized Xen running on
> Centos 5 64bit and I'm hoping someone can spot what I'm doing wrong.
> I've been attemping to do this for a few days now and I'm really not
> seeing what I'm doing wrong.
>  
> Here's what I've done:
>  
> 1. Installed Centos 5 64-bit on the Dom0
> 2. Installed a fully virtualized DomU running Centos 5 64-bit.
> 3. Created a new configuration file that will create a paravirtualized
> DomU.
Why aren't you using virt-install? Did you want to duplicate the virtual 
system entirely?
Also, if you're using pygrub, you don't have to state a kernel. I don't 
know if it breaks things, but it's confusing at best.

> The DomU boots and runs in fully virtualized mode. However, the
> paravirutalized DomU refuses to boot.
>  
> Here are the relevant configurations:
>  
> 1. The fully virtualized config
> # Automatically generated xen config file
> name = "vm_oracle"
> builder = "hvm"
> memory = "2000"
> disk = [ 'phy:/dev/BigMamaVolGroup/VMOracleSysDisk,hda,w', ]
> vif = [ 'type=ioemu, mac=00:16:3e:67:38:e4, bridge=xenbr0', ]
> uuid = "d0e7d705-aa8c-c2c0-8926-bc03d3f9d56a"
> device_model = "/usr/lib64/xen/bin/qemu-dm"
> kernel = "/usr/lib/xen/boot/hvmloader"
> vnc=1
> vncunused=1
> apic=1
> acpi=1
> pae=1
>  
> vcpus=2
> serial = "pty" # enable serial console
> on_reboot   = 'restart'
> on_crash    = 'restart'
>
> 2. The paravirtualized config
>
> # Automatically generated xen config file
> name = "vm_oracle_para"
> builder = "linux"
> memory = "2000"
> disk = [ 'phy:/dev/BigMamaVolGroup/VMOracleSysDisk,hda,w', ]
> vif = [ 'type=ioemu, mac=00:16:3e:67:38:e4, bridge=xenbr0', ]
> uuid = "d0e7d705-aa8c-c2c0-8926-bc03d3f9d56a"
> #pae=1
> kernel="/boot/vmlinuz-2.6.18-8.1.15.el5.centos.plusxen"
> bootloader="/usr/bin/pygrub"
>  
> vcpus=2
> serial = "pty" # enable serial console
> on_reboot   = 'restart'
> on_crash    = 'preserve'
>
>
> Also on Dom0:
> [root@bigmama xen]# uname -a
> Linux bigmama.secana.local 2.6.18-8.1.15.el5.centos.plusxen #1 SMP Thu
> Oct 25 07:21:34 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
> [root@bigmama xen]# arch
> x86_64
>
>
>
>
> Then, I try to create the vm_oracle_para DomU, choosing the same kernel
> as the Dom0. (The vm_oracle is of course not running)
>
> [root@bigmama xen]# xm create -c vm_oracle_para
> Using config file "./vm_oracle_para".
> Going to boot CentOS (2.6.18-8.1.15.el5.centos.plusxen)
>   kernel: /xen.gz-2.6.18-8.1.15.el5.centos.plus
> Error: (22, 'Invalid argument')
>
> Hmm! Let's look at the logs:
>
> [root@bigmama xen]# xm log | tail -100
> ....
> [2007-11-14 10:44:53 xend.XendDomainInfo 8352] DEBUG
> (XendDomainInfo:190) XendDomainInfo.create([\047vm\047, [\047name\047,
> \047vm_oracle_para\047], [\047memory\047, \0472000\047],
> [\047on_reboot\047, \047restart\047], [\047on_crash\047,
> \047preserve\047], [\047vcpus\047, 2], [\047uuid\047,
> \047d0e7d705-aa8c-c2c0-8926-bc03d3f9d56a\047], [\047bootloader\047,
> \047/usr/bin/pygrub\047], [\047image\047, [\047linux\047,
> [\047kernel\047, \047/var/lib/xen/vmlinuz.wLlJ26\047], [\047args\047,
> \047None\047]]], [\047device\047, [\047vbd\047, [\047uname\047,
> \047phy:/dev/BigMamaVolGroup/VMOracleSysDisk\047], [\047dev\047,
> \047hda\047], [\047mode\047, \047w\047]]], [\047device\047,
> [\047vif\047, [\047bridge\047, \047xenbr0\047], [\047mac\047,
> \04700:16:3e:67:38:e4\047], [\047type\047, \047ioemu\047]]]])
> [2007-11-14 10:44:53 xend.XendDomainInfo 8352] DEBUG
> (XendDomainInfo:296) parseConfig: config is [\047vm\047, [\047name\047,
> \047vm_oracle_para\047], [\047memory\047, \0472000\047],
> [\047on_reboot\047, \047restart\047], [\047on_crash\047,
> \047preserve\047], [\047vcpus\047, 2], [\047uuid\047,
> \047d0e7d705-aa8c-c2c0-8926-bc03d3f9d56a\047], [\047bootloader\047,
> \047/usr/bin/pygrub\047], [\047image\047, [\047linux\047,
> [\047kernel\047, \047/var/lib/xen/vmlinuz.wLlJ26\047], [\047args\047,
> \047None\047]]], [\047device\047, [\047vbd\047, [\047uname\047,
> \047phy:/dev/BigMamaVolGroup/VMOracleSysDisk\047], [\047dev\047,
> \047hda\047], [\047mode\047, \047w\047]]], [\047device\047,
> [\047vif\047, [\047bridge\047, \047xenbr0\047], [\047mac\047,
> \04700:16:3e:67:38:e4\047], [\047type\047, \047ioemu\047]]]]
> [2007-11-14 10:44:53 xend.XendDomainInfo 8352] DEBUG
> (XendDomainInfo:397) parseConfig: result is {\047shadow_memory\047:
> None, \047start_time\047: None, \047uuid\047:
> \047d0e7d705-aa8c-c2c0-8926-bc03d3f9d56a\047, \047on_crash\047:
> \047preserve\047, \047on_reboot\047: \047restart\047, \047localtime\047:
> None, \047image\047: [\047linux\047, [\047kernel\047,
> \047/var/lib/xen/vmlinuz.wLlJ26\047], [\047args\047, \047None\047]],
> \047on_poweroff\047: None, \047bootloader_args\047: None, \047cpus\047:
> None, \047name\047: \047vm_oracle_para\047, \047backend\047: [],
> \047vcpus\047: 2, \047cpu_weight\047: None, \047features\047: None,
> \047vcpu_avail\047: None, \047memory\047: 2000, \047device\047:
> [(\047vbd\047, [\047vbd\047, [\047uname\047,
> \047phy:/dev/BigMamaVolGroup/VMOracleSysDisk\047], [\047dev\047,
> \047hda\047], [\047mode\047, \047w\047]]), (\047vif\047, [\047vif\047,
> [\047bridge\047, \047xenbr0\047], [\047mac\047,
> \04700:16:3e:67:38:e4\047], [\047type\047, \047ioemu\047]])],
> \047bootloader\047: \047/usr/bin/pygrub\047, \047cpu\047: None,
> \047maxmem\047: None}
> [2007-11-14 10:44:53 xend.XendDomainInfo 8352] DEBUG
> (XendDomainInfo:1264) XendDomainInfo.construct: None
> [2007-11-14 10:44:53 xend.XendDomainInfo 8352] DEBUG
> (XendDomainInfo:1296) XendDomainInfo.initDomain: 70 1.0
> [2007-11-14 10:44:53 xend 8352] DEBUG (balloon:127) Balloon: 4125180 KiB
> free; need 2048000; done.
> [2007-11-14 10:44:53 xend 8352] INFO (image:136) buildDomain os=linux
> dom=70 vcpus=2
> [2007-11-14 10:44:53 xend 8352] DEBUG (image:199) dom            = 70
> [2007-11-14 10:44:53 xend 8352] DEBUG (image:200) image          =
> /var/lib/xen/vmlinuz.wLlJ26
> [2007-11-14 10:44:53 xend 8352] DEBUG (image:201) store_evtchn   = 1
> [2007-11-14 10:44:53 xend 8352] DEBUG (image:202) console_evtchn = 2
> [2007-11-14 10:44:53 xend 8352] DEBUG (image:203) cmdline        =  None
> [2007-11-14 10:44:53 xend 8352] DEBUG (image:204) ramdisk        =
> [2007-11-14 10:44:53 xend 8352] DEBUG (image:205) vcpus          = 2
> [2007-11-14 10:44:53 xend 8352] DEBUG (image:206) features       =
> [2007-11-14 10:44:53 xend.XendDomainInfo 8352] ERROR
> (XendDomainInfo:202) Domain construction failed
> Traceback (most recent call last):
>   File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py",
> line 195, in create
>     vm.initDomain()
>   File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py",
> line 1377, in initDomain
>     raise VmError(str(exn))
> VmError: (22, \047Invalid argument\047)
> [2007-11-14 10:44:53 xend.XendDomainInfo 8352] DEBUG
> (XendDomainInfo:1463) XendDomainInfo.destroy: domid=70
> [2007-11-14 10:44:53 xend.XendDomainInfo 8352] DEBUG
> (XendDomainInfo:1471) XendDomainInfo.destroyDomain(70)
>
> .. and.. 
>
> [root@bigmama xen]# tail -2 /var/log/xen/xend-debug.log
> ERROR: Kernel not a Xen-compatible Elf image.
> ERROR: Error constructing guest OS
>
>
>
>
> If I start vm_oracle (not vm_oracle_para), I'll get this:
>
> [root@vm-oracle ~]# uname -a
> Linux vm-oracle.secana.local 2.6.18-8.1.15.el5.centos.plus #1 SMP Thu
> Oct 25 06:48:46 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
> [root@vm-oracle ~]# arch
> x86_64
>
> I've set up grub to boot by defailt non-xen kernel in order to
> accomodate booting both in fully virtualized and paravirtualized mode. I
> use pygrub to boot the xen-kernel when trying to boot in paravirtualized
> mode.
>
> As you probably spotted, I'm using LVM on the Dom0 to provide physical
> storage for my virtual block devices.
>
>
>
> Can anyone provide a link til a guide, or can anyone tell me what I'm
> doing wrong, please?
>
> Best regards,
> Jens-Petter Salvesen
>
> _______________________________________________
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> http://lists.xensource.com/xen-users
>   

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