Re: [Xen-users] First time xen install - Xen DomU runs, but can't find "/dev/root"

[G Crowe <gcxenlist@xxxxxxxxxx>]

OK, I have managed to get it largely working, thank you for your assistance.

- Virt-install using a CD image on a local filesystem loads the kernel 
and initrd correctly, but doesn't load the /root correctly from the CD. 
I never figured out how to do this, but /dev/xvda was the virtual disc 
that I was trying to install onto (and therefore was empty and wouldn't 
act as a root filesystem). It is possible that the --extra-args option 
may be used to fix this, but I have mine working now and am unlikely to 
spend too much more time trying.
- I managed to install it by setting up a web server on another machine, 
and mounted the install CD into the web server's /var/www/html/f18 
directory. Thank you Dario for the references to the test day where all 
their installs were via the network (although they use PXE, which I have 
no experience in) - I tried this after noticing that the pros didn't use 
the local filesystems for installs.
- 256MB of RAM is insufficient to install F18 in text mode. I had to 
increase it to 512MB. With 256MB I was getting pages of out of memory 
errors and the install would fail.
- One of the first things I tried was the --cdrom option, however this 
requires HVM which my current CPU does not support.
- I am still having issues with the xl toolchain. Firstly, when used to 
install, it would bomb out with an error when it went to connect to the 
new console (immediately connecting to the console manually would work). 
Secondly it wouldn't recognise DomUs as being deleted and would not 
allow me to recreate them "ERROR Guest name 'xen1' is already in use.". 
If I manually started xend, both of these problems would disappear 
without changing the virt-install command. Maybe if I updated my 
software then this problem would go away (unfortunately this machine 
doesn't have a direct connection to the internet - hence me using 
install DVD images rather than remote URLs).
- For the record, the command I used to install successfully from the 
console was
virt-install --paravirt --name xen1 --ram 512 --vcpus 1 -f 
/dev/fedora_dhcp1/xen1 --network bridge=br0 --location 
http://www.example.com/f18 --graphics none
Thanks all for your help - you've now got me to a stage where I can 
'fiddle' around myself.

Thank you

Graham Crowe

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