[Freeipa-users] Reinstalling a host without deleting

[Dan Scott]

On Tue, Nov 15, 2011 at 08:38, Simo Sorce <simo at redhat.com> wrote:
> On Tue, 2011-11-15 at 08:33 -0500, Dan Scott wrote:
>> Hi,
>>
>> On Tue, Nov 15, 2011 at 07:07, Natxo Asenjo <natxo.asenjo at gmail.com> wrote:
>> > On Tue, Nov 15, 2011 at 12:40 AM, Dan Scott <danieljamesscott at gmail.com> wrote:
>> >> Hi,
>> >>
>> >> Is there a 'nice' way to reinstall a host? i.e. The host has already
>> >> been installed in FreeIPA and for whatever reason I need to reinstall
>> >> the OS, so I have a clean system and the host is already enrolled on
>> >> the server.
>> >>
>> >> ipa-client-install fails with "Host already enrolled" and I have to
>> >> connect to an enrolled client, remove the host, and then return to
>> >> install the client.
>> >>
>> >> Would it be possible to have a '--reinstall' option to
>> >> ipa-client-install? It wouldn't have to add the host into IPA, just
>> >> configure the files and get the keytab.
>> >
>> > If I understand it correctly, this could overwrite hosts passwords
>> > which is probably not what you want with a kerberos realm.
>>
>> So *getting* a new keytab would overwrite host passwords? Why wouldn't
>> I want that, if I'm reinstalling a host?
>>
>> > You should manually remove the host first from the realm and then rejoin it.
>
> No, actually if the host offers services you probably prefer rejoining
> in a way that keeps the original keys in the keytab and the new keys get
> a new kvno. This way clients that obtained a ticket before the
> re-install can still use them.
>
>> Why? I'd much rather have the ipa-client-install script do the removal
>> for me.... if it actually requires removal and re-addition.
>>
>> Do I really have to remove and re-add? Why can't I just re-provision?
>
> You should be able to. See other mails in this thread.

Great, thanks. So we can make an 'ipa-client-install --reinstall'
which does the equivalent of reconfiguring the config files and
re-getting the keytab.

Thanks.