Josh Kelley wrote:
> Actually, I was able to get CentOS running under Xen (as host and
> guest) without too much effort. Unfortunately, I didn't take very
> good notes... No custom repository or newer gcc or other recompiling
> is needed. A patched kernel is needed, but Xen automates that for
> you; see Xen's docs for details.
>
> Xen's web site provides a binary download of Xen 2.0.7, which works
> without any problems, although their precompiled kernel (based off of
> a stock 2.6.x kernel) contains relatively few modules. You can also
> recompile 2.0.7 from source to add kernel modules. Getting Xen 2.x to
> work with CentOS's customized kernel, or getting Fedora's newer
> version of Xen to work, could be quite a bit more effort.
>
> Since you haven't updated glibc, you'll want to mv /lib/tls
> /lib/tls.disabled on both host and guest OSes to improve performance.
> Installing the guest OS can be a bit trickier; you can do a CD-based
> install (reboot the host off of the CD then install CentOS to an blank
> partition that will be used as the guest), or you can use rpmstrap or
> yum --installroot. See
> http://mark.foster.cc/wiki/index.php/Centos-4_on_Xen for details on
> the latter two options.
>
> Feel free to contact me if you have any more questions. Hope this helps.
>
> Josh Kelley
I'm using Centos as my host and guest operating systems.
The big thing that didn't work out of the box for me was firewalling so
I compiled my own Xen kernel (only minor heavy lifting required)
http://www.pendragon.org/mywiki/Xen
If TLS is absolutely required glibc would have to be recompiled with the
appropriate flag: -mno-tls-direct-seg-refs
http://wiki.xensource.com/xenwiki/XenSpecificGlibc
You can also install guests using something like:
mount /dev/vg00/xen00 /mnt/tmp
yum --installroot=/mnt/tmp -y groupinstall base
umount /mnt/tmp
You will likely want to create a local repository out of the install
media first though instead of installing all the rpms off of the 'net
each time.
-Mike
