On 11-07-18 8:26 AM, Steve Campbell campb...@cnpapers.com wrote:
On 6/28/2011 10:50 AM, Ed Heron wrote:
On Tue, 2011-06-28 at 09:30 -0400, Steve Campbell wrote:
Mr. Heron was so kind to make a suggestion that I should use disk images
to install VMs. Upon further thought, I kinda like the idea. So I
re-read the manual and google a little, and discover I still don't know
what should be in these disk images.
Should I copy the contents of the CDs to a file or what? I've got a test
server at the moment with Centos 5.5 and xen installed as the host OS,
but have just downloaded the 5.6 CD ISOs along with the DVD ISO, so
I'll use 5.6 for my VMs. I've read about how I can create an image from
something that already exists.
Again, any clarity would be appreciated.
Just put the ISO's in /var/lib/xen/images and point at them. If you
didn't download the discs, you can rip them using:
dd if=/dev/optical device of=/var/lib/xen/images/name of disc
For example, if ripping the first 5.6 CD...
dd if=/dev/hdc of=/var/lib/xen/images/CentOS-5.6-i386-d1.iso
I generally rip a disc multiple times and then do a file compare to make
sure I've got a reasonable chance of having an undamaged copy.
Keep in mind that it isn't as easy to change discs when you are using
images on a paravirtual machine.
I still recommend setting up a local repository as a much better
solution because it allows you to take a snapshot so multiple installs
use the exact same versions of everything.
I moved the iso images to a folder under /var/lib/xen/images and
selected it during an install for a new VM. I've run into a problem I've
not yet seen before. The first iso is used just fine, but the second is
Not accessible, and nothing I can discover works.
So, should the ISOs be moved directly to the images folder instead of a
folder below images? Does it matter whether I just copy the iso files
(actually, I used scp) or do they need to be run through dd?
If you have SELinux enabled then it could be denying access to images in a
'non-standard' folder. Try putting them directly in the images folder, or
alternatively, if you don't care about SELinux, setting SELinux to
Permissive or Disabled.
Cheers,
Kelvin
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