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| author | Sandy Walsh <sandy.walsh@rackspace.com> | 2011-05-30 00:45:15 -0300 |
|---|---|---|
| committer | Sandy Walsh <sandy.walsh@rackspace.com> | 2011-05-30 00:45:15 -0300 |
| commit | 5101aa300b087bf57f22cb128649679e8b11051d (patch) | |
| tree | 8d59c42a00fb51533f4f9264214b28c7da7e3f60 /doc | |
| parent | c3c2c1a63c126f046457d0d61306ebe9c46af700 (diff) | |
| download | nova-5101aa300b087bf57f22cb128649679e8b11051d.tar.gz | |
reservation_id's done
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/source/devref/distributed_scheduler.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/source/devref/distributed_scheduler.rst b/doc/source/devref/distributed_scheduler.rst index c9aaf8c01e..402f50beef 100644 --- a/doc/source/devref/distributed_scheduler.rst +++ b/doc/source/devref/distributed_scheduler.rst @@ -104,8 +104,17 @@ Throughout the `nova.api.openstack.servers`, `nova.api.openstack.zones`, `nova.c Reservation ID's --------------- +NOTE: The features described in this section are related to the up-coming 'merge-4' branch. +The OpenStack API allows a user to list all the instances they own via the `GET /servers/` command or the details on a particular instance via `GET /servers/###`. This mechanism is usually sufficient since OS API only allows for creating one instance at a time, unlike the EC2 API which allows you to specify a quantity of instances to be created. +NOTE: currently the `GET /servers` command is not Zone-aware since all operations done in child Zones are done via a single administrative account. Therefore, asking a child Zone to `GET /servers` would return all the active instances ... and that would be bad. Later, when the Keystone Auth system is integrated with Nova, this functionality will be enabled. + +We could use the OS API 1.1 Extensions mechanism to accept a `num_instances` parameter, but this would result in a different return code. Instead of getting back an `Instance` record, we would be getting back a `reservation_id`. So, instead, we've implemented a new command `POST /zones/servers` command which is nearly identical to `POST /servers` except that it takes a `num_instances` parameter and returns a `reservation_id`. Perhaps in OS API 2.x we can unify these approaches. + +Finally, we need to give the user a way to get information on each of the instances created under this `reservation_id`. Fortunately, this is still possible with the existing `GET /servers` command, so long as we add a new optional `reservation_id` parameter. + +`python-novaclient` will be extended to support both of these changes. Host Filter -------------- |