[libvirt] [PATCH] virsh: add --start option to the define command

Daniel P. Berrange berrange at redhat.com
Wed Jan 9 10:28:55 UTC 2013


On Tue, Jan 08, 2013 at 04:41:58PM -0700, Eric Blake wrote:
> On 01/08/2013 02:36 PM, Doug Goldstein wrote:
> > I often find myself doing virsh "define blah.xml; start blah". I figured
> > adding this would be a easier^Hlazier way to do it.
> > ---
> >  tools/virsh-domain.c |   20 ++++++++++++++++++--
> >  1 files changed, 18 insertions(+), 2 deletions(-)
> 
> Offhand, I like it.  However,
> 
> We have virDomainDefineXML with no flags, but we have virDomainCreateXML
> with flags; maybe the better approach is to add a new creation flag that
> says that in addition to starting the domain, we also make it persistent
> at the same time.
> 
> But if we do that, it would argue that 'virsh create --persistent
> blah.xml' is nicer than 'virsh define --start blah.xml', at least in
> that the former needs only 1 API call for new libvirt (but falls back to
> 2 API calls when talking to older libvirt), while the latter always
> needs 2 API calls.
> 
> Or maybe it means we need to add virDomainDefineXMLFlags().
> 
> Anyone else want to throw some paint on the bikeshed on how best to make
> the user experience nicer?

While I think the virsh idea is fine, I don't want to see this done
at the virDomainDefine API level, since it just duplicates functionality
already present. Just have virsh make an API call to the existing create
API.

Daniel
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