Open Stack

Hi all!


I proposed 'Idempotency for OpenStack API' as before.
In this time, I rewrote BP(
https://blueprints.launchpad.net/nova/+spec/idempotentcy-client-token ) and
I implemented proto of it.


I image below use-case.
User can't know instance ID when the client has gone away before user get
'create server' response of request.
So, User need to something which User can specify token like a mark.
In the service, which can also be a problem of charging.

In this case, idempotency client token is so useful.
To specify the token itself by User, User can know status of server.
How many times User put POST method, it is guaranteed the state of the POST
which was same with return of User's first POST request.


Moreover, I found that this BP(
https://blueprints.launchpad.net/heat/+spec/support-retry-with-idempotency )
is based on my blueprint.


If you have any idea about or question, please feel free to discuss
anything.
** Also, I will attend HK summit.

Sincerely,
Haruka Tanizawa
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