[Engine-devel] Error message while trying to delete default cluster

[Omer Frenkel]

----- Original Message -----
> From: "Shubhendu Tripathi" <shtripat at redhat.com>
> To: "engine-devel" <engine-devel at ovirt.org>, "michal skrivanek" <michal.skrivanek at redhat.com>, "Omer Frenkel"
> <ofrenkel at redhat.com>, "Allon Mureinik" <amureini at redhat.com>
> Cc: "Dusmant Pati" <dpati at redhat.com>
> Sent: Monday, November 11, 2013 8:20:41 AM
> Subject: Error message while trying to delete default cluster
> 
> Hi,
> 
> While trying to delete the Default cluster in oVirt it shows the below
> error message -
> 
> "Cannot remove default Host Cluster.
> Cannot remove Cluster. One or more Template(s) are still associated with it"
> 
> But in the case of RHSC, Templates are not used and this message is not
> relevant. [1].
> 
> Can we opt for not installing the templates while engine setup? And
> would it be having any impact/consequences ?
> 
> Kindly provide your thoughts and possibility of the same.
> 
> Thanks and Regards,
> Shubhendu
> 
> PS:
> [1]: https://bugzilla.redhat.com/show_bug.cgi?id=1019838
> 

removing the blank template means the system couldn't be used to create vms at all.

but blank template is not the only problem,
there is an explicit check that prevent deleting the default cluster (RemoveVdsGroupCommand class, line #35),
i couldn't find the commit that added this,
but i /think/ its because by default host registration is done to the default cluster,
so it had to exist.

so this should be solved first.

then, if we decide to have a 'non-virt' installation we probably could avoid default cluster and blank template.
but what if user changes his mind after installation?

another option is to remove the protection from DB level and make cluster-id nullable in the vm_static table,
and have logic to allow removing last cluster and update template on new cluster addition.