[Users] Linux sysprep

[Louis Coilliot]

I DO this, sorry.


2013/8/19 Louis Coilliot <louis.coilliot at think.fr>

> Hello,
>
> I usually does this :
>
> http://www.kermit.fr/lofic/snipper/20/
>
> Regards,
>
> Louis Coilliot
>
>
> 2013/8/19 René Koch (ovido) <r.koch at 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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>>
>
>
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