Installation guide

You can check the amount of memory in use by domain0 by using the xm list domain0
command. If dom0 is not ballooned down, you can use the command virsh setmem dom0
NewMemSize to check memory.
You receive the following error:
wrong kernel image: non-PAE kernel on a PAE
This message indicates that you are trying to run an unsupported guest kernel image on your
hypervisor. This happens when you try to boot a non-PAE, para-virtualized guest kernel on a Red
Hat Enterprise Linux 5 host. The Red Hat kernel-xen package only supports guest kernels with PAE
and 64 bit architectures.
Type this command:
# xm create -c va-base
Using config file "va-base"
Error: (22, 'invalid argument')
[2006-12-14 14:55:46 xend.XendDomainInfo 3874] ERRORs
(XendDomainInfo:202) Domain construction failed
Traceback (most recent call last)
File "/usr/lib/python2.4/site-packages/xen/xend/XendDomainInfo.py", line 195 in
create vm.initDomain()
File " /usr/lib/python2.4/site-packages/xen/xend/XendDomainInfo.py", line 1363 in
initDomain raise VmError(str(exn))
VmError: (22, 'Invalid argument')
[2006-12-14 14:55:46 xend.XendDomainInfo 3874] DEBUG (XenDomainInfo: 1449]
XendDlomainInfo.destroy: domain=1
[2006-12-14 14:55:46 xend.XendDomainInfo 3874] DEBUG (XenDomainInfo: 1457]
XendDlomainInfo.destroy:Domain(1)
If you need to run a 32 bit non-PAE kernel you will need to run your guest as a fully virtualized virtual
machine. For para-virtualized guests, if you need to run a 32 bit PAE guest, then you must have a 32
bit PAE hypervisor. For para-virtualized guests, to run a 64 bit PAE guest, then you must have a 64
bit PAE hypervisor. For full virtualization guests you must run a 64 bit guest with a 64 bit hypervisor.
The 32 bit PAE hypervisor that comes with Red Hat Enterprise Linux 5 i686 only supports running 32
bit PAE para virtualized and 32 bit fully virtualized guest OSes. The 64 bit hypervisor only supports
64 bit para-virtualized guests.
This happens when you move the full virtualized HVM guest onto a Red Hat Enterprise Linux 5
system. Your guest may fail to boot and you will see an error in the console screen. Check the PAE
entry in your configuration file and ensure that pae=1.You should use a 32 bit distribution.
You receive the following error:
Unable to open a connection to the Xen hypervisor or daemon
This happens when the virt-manager application fails to launch. This error occurs when there is no
localhost entry in the /etc/hosts configuration file. Check the file and verify if the localhost entry
is enabled. Here is an example of an incorrect localhost entry:
# Do not remove the following line, or various programs
# that require network functionality will fail.
localhost.localdomain localhost
Here is an example of a correct localhost entry:
Red Hat En t erp rise Lin ux 5 Virt ualizat ion Guid e
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