Hello, I usually does this : http://www.kermit.fr/lofic/snipper/20/ Regards, Louis Coilliot 2013/8/19 René Koch (ovido) <r.koch@ovido.at>
Hi,
Has anyone an idea what's the easiest way to sysprep Linux (CentOS 6 and RHEL 6) machines?
The use case is the following: I want to create a lot of virtual machines (e.g. 100) by cloning from one template. So I create a master vm, create a template and a pool with 100 vms assigned to it and set all 100 vms to prestarted.
The problem is now, that when I run "sys-unconfig" before creating the template, which does a "touch /.unconfigured" I have to go through the sysconfig-tui and set a new root password for all 100 hosts.
So what I'm looking for is a script like the sysprep tool for windows which sets parameters for me automatically. I only need to change: * Hostname + set DHCP_HOSTNAME in ifcfg-eth0 (Hostname == Pool-VM-Name) for some dhcp/ddns magic :) * Clear udev network-rules * remove SSH-Keys * Remove RHN ID and join Satellite/Spacewalk-server * root-password,... should stay the same
My first question is: does oVirt provide such a functionality for Linux guest out-of-the-box? I couldn't find one.
I think I could solve this with virt-sysprep and virt-file, but I'm unsure if I can use it with oVirt (or only with plain libvirt): http://libguestfs.org/virt-sysprep.1.html http://libguestfs.org/virt-edit.1.html
For this tools it's required that the vm is not running, as it changes files on the disk. If I'm using a before-vm-start hook, it should be save to access the disk and change content with virt-sysprep/virt-file, right? But do I have access to the disk in a before-vm-start hook? If using NFS storage I should be able to access all disks on the NFS-share, but for iSCSI/FC-LUNS - are they available on the hypervisor in this stage?
Another option would be to write a custom script which is started during boot and disables itself after successful run (in the same way as firstboot - I already have such a script for RHN Satellite/Spacewalk joins). The problem here is: How do I get the (oVirt) name of this vm (would need something like virt-whoami :) )? Is the (internal oVirt) ID of this vm stored somewhere in the filesystem of this vm? I don't think so....
Thanks a lot for suggestions, René
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