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Thanks for the answer.

On 2018-06-01 18:04, Kevin Benton wrote:
> The neutron API now supports compare and swap updates with an If-Match 
> header so the race condition can be avoided.
> https://bugs.launchpad.net/neutron/+bug/1703234
>
>
>
> On Fri, Jun 1, 2018, 04:57 Rabi Mishra <ramishra at redhat.com 
> <mailto:ramishra at redhat.com>> wrote:
>
>
>     On Fri, Jun 1, 2018 at 3:57 PM, Lajos Katona
>     <lajos.katona at ericsson.com <mailto:lajos.katona at ericsson.com>> wrote:
>
>         Hi,
>
>         Could somebody help me out with Neutron's Extraroute support
>         in Hot templates.
>         The support status of the Extraroute is support.UNSUPPORTED in
>         heat, and only create and delete are the supported operations.
>         see:
>         https://github.com/openstack/heat/blob/master/heat/engine/resources/openstack/neutron/extraroute.py#LC35
>
>         As I see the unsupported tag was added when the feature was
>         moved from the contrib folder to in-tree
>         (https://review.openstack.org/186608)
>         Perhaps you can help me out why only create and delete are
>         supported and update not.
>
>
>     I think most of the resources when moved from contrib to in-tree
>     are marked as unsupported. Adding routes to an existing router by
>     multiple stacks can be racy and is probably the reason use of this
>     resource is not encouraged and hence it's not supported. You can
>     see the discussion in the original patch that proposed this
>     resource https://review.openstack.org/#/c/41044/
>
>     Not sure if things have changed on neutron side for us to revisit
>     the concerns.
>
>     Also it does not have any update_allowed properties, hence no
>     handle_update(). It would be replaced if you change any property.
>
>     Hope it helps.
>
>         Thanks in advance for  the help.
>
>         Regards
>         Lajos
>
>
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>
>
>     -- 
>     Regards,
>     Rabi Mishra
>
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