util-vserver:Howto virtualize an exisiting Linux server

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Revision as of 20:05, 11 July 2009 by (Talk)

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Virtualize CentOS4

  • Create a regular guest
vserver yourguest build ...
  • Empty the just created guest
rm -rf /vservers/yourguest/*
  • Copy your old server to the previous folder
rsync -rv --progress --partial --exclude '/proc/*' yourguest:/  /vservers/yourguest/
Why yourguest:/ shouldn't that be / ?
Answer: You're now on the host server about to copy an existing installation on another hardware.
Would suggest "rsync -av --numeric-ids" instead of "rsync -rv" (preserves permissions, timestamps, ...)

guest on the host, not the guest.

  • Remove the fstab
rm /vservers/yourguest/etc/fstab
  • Remove the services that makes troubles at start
rm /vservers/yourguest/etc/rc.d/init.d/network
rm /vservers/yourguest/etc/rc.d/init.d/.....
What are the troubled services? What is the minimal setup to make it work?
Answer: Any hardware related services will be troubled and should be removed.
  • Disable Pam authentification for ssh access
edit /vservers/yourguest/etc/ssh/sshd_config  ->  (UsePAM no)
replace # Listen with Listen yourguestip (this has to been done on the host too is your host ip)
  • Remove the useless modules
rm /etc/modprobe.conf
Do you mean editing modprobe.conf? Why delete the file?
Answer: Probing modules make no sense in a virtual environment.
  • Start your vserver !
vserver yourguest start
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