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xen-users
Re: [Xen-users] Problem installing CentOS DomU.
Jia Rao wrote:
Hi all,
I have a Dell server with dual-core 2.4 GHz Xeon processor (3060). I
install the 64 bit CentOS 5 Dom0 and Xen 3.1 with no problem. The HVM
fully virtualized 64 bit DomU was also installed successfully.
However, when I install the para-virtualized CentOS 64 bit DomU, I
received the following error message:
[root@localhost ~]# xm create /etc/xen/VM_para.cfg
Using config file "/etc/xen/VM_para.cfg".
Xend has probably crashed! Invalid or missing HTTP status code.
You need a proper initrd image to work with this.
The content of Xend.log is:
[2008-02-20 23:44:00 xend.XendDomainInfo 16686] DEBUG
(XendDomainInfo:1349) XendDomainInfo.construct: None
[2008-02-20 23:44:00 xend 16686] DEBUG (balloon:127) Balloon: 521740
KiB free; need 2048; done.
[2008-02-20 23:44:00 xend.XendDomainInfo 16686] DEBUG
(XendDomainInfo:1397) XendDomainInfo.initDomain: 10 1.0
[2008-02-20 23:44:00 xend.XendDomainInfo 16686] DEBUG
(XendDomainInfo:1436) _initDomain:shadow_memory=0x0, maxmem=0x200,
memory=0x200.
[2008-02-20 23:44:00 xend 16686] DEBUG (balloon:133) Balloon: 521732
KiB free; 0 to scrub; need 524288; retries: 20.
[2008-02-20 23:44:00 xend 16686] DEBUG (balloon:148) Balloon: setting
dom0 target to 997 MiB.
[2008-02-20 23:44:00 xend.XendDomainInfo 16686] DEBUG
(XendDomainInfo:1078) Setting memory target of domain Domain-0 (0) to
997 MiB.
[2008-02-20 23:44:00 xend 16686] DEBUG (balloon:127) Balloon: 524804
KiB free; need 524288; done.
[2008-02-20 23:44:00 xend 16686] INFO (image:136) buildDomain os=linux
dom=10 vcpus=1
[2008-02-20 23:44:00 xend 16686] DEBUG (image:201) domid = 10
[2008-02-20 23:44:00 xend 16686] DEBUG (image:202) memsize = 512
[2008-02-20 23:44:00 xend 16686] DEBUG (image:203) image =
/boot/vmlinuz-2.6.18-64-xen
[2008-02-20 23:44:00 xend 16686] DEBUG (image:204) store_evtchn = 1
[2008-02-20 23:44:00 xend 16686] DEBUG (image:205) console_evtchn = 2
[2008-02-20 23:44:00 xend 16686] DEBUG (image:206) cmdline =
ip=172.21.4.196:1 <http://172.21.4.196:1>.2.3.4::::eth0:off
root=/dev/sda1 ro xencons=tty
[2008-02-20 23:44:00 xend 16686] DEBUG (image:207) ramdisk =
[2008-02-20 23:44:00 xend 16686] DEBUG (image:208) vcpus = 1
[2008-02-20 23:44:00 xend 16686] DEBUG (image:209) features =
[2008-02-20 23:44:01 xend 3076] CRITICAL (SrvDaemon:195) Xend died due
to signal 11! Restarting it.
[2008-02-20 23:44:01 xend 18652] INFO (SrvDaemon:283) Xend Daemon started
Nothing in xend-debug.log.
This seems a common problem and many asked about it, but without
solutions.
Both Xen and the para kernels are compiled from source using the
script provided with Xen. Dom0 and DomU use the same kernel.
My configuration for the para VM is :
kernel = '/boot/vmlinuz-2.6.18-64-xen'
#ramdisk = '/boot/initrd-2.6.18-xen.img'
memory = '512'
root = '/dev/sda1 ro'
disk = [ 'file:/var/lib/xen/images/VM_para_disk.img,sda1,w',
'file:/var/lib/xen/images/VM_para_swap.img,sda2,w' ]
Better you use tap:aio: instead of file:.
name = 'VM_para'
vif = [ '' ]
ip = "172.21.4.196 <http://172.21.4.196>"
extra='xencons=tty'
on_poweroff = 'destroy'
on_reboot = 'restart'
on_crash = 'restart'
I saw from the xen wiki that xen does not support 64 bit domU even the
dom0 is 64 bit.
This is not true.
But I did successfully installed HVM 64 bit dom0.
Does Xen support para-virtualized domU?
Xen supports 64bit paravirt domu on 64bit dom0. And even 32bit dom0.
Does anyone know what is my problem with the 64 bit domU? (I tried 32
bit domU, the same problem.) .
The problem here is the way you are doing things. There is no need you
compile xen-3.1 from source and take risk to make xen working on a
Centos-5.1. CentOS-5.1 provides xen support in the distribution (which
is xen-3.1). All that you need to do is "yum install kernel-xen xen
virt-manager". Then use virt-manager to create and manage guests.
If you want to run xen-3.2, it's ok to compile it from source. Otherwise
I recommend using the xen provided with the distribution.
--Sadique
Thanks very much,
Jia.
------------------------------------------------------------------------
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