[Ovirt-devel] [PATCH]: Fix ovirt-identify-node to work at boot time

[Daniel P. Berrange]

On Wed, Jun 04, 2008 at 04:16:17PM -0400, Perry N. Myers wrote:
> Daniel P. Berrange wrote:
> >On Wed, Jun 04, 2008 at 09:47:08PM +0200, Chris Lalancette wrote:
> >>Problem: ovirt-identify-node was calling libvirt functions.  However, 
> >>libvirtd
> >>isn't running at this point in boot, so calling these functions fails.
> >
> >Surely libvirtd should be set to run before any oVirt services on the
> >host start. There's a clear line of dependancy from oVirt to libvirt
> >so the startup should reflect that.
> 
> Catch-22 problem....  if you have suggestions let me know.
> 
> libvirt requires a keytab to work properly.  The code that is executing is 
> code to GET the keytab.  Therefore this must execute prior to libvirt. 

Ok that makes sense now.

> Bad design...

Indeed :-)

> We're probably going to change the startup sequence to be like this 
> instead (but this will have to happen after summit)
> 
> 1. ovirt init script starts so keytab could get retrieved
> 2. libvirt start
> 3. another ovirt initscript starts to give hardware info to ovirt server

That plan gets my vote.  The first step will go away if the host has a
persistent storage capability for the keys (tpm/flash/usbkey etc), so
having it independant of step 3 is a good idea.

Regards,
Dan.
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