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https://issues.apache.org/jira/browse/DTACLOUD-488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13584450#comment-13584450
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Marios Andreou commented on DTACLOUD-488:
-----------------------------------------
pushed with commit # be1842b8cc67abd0d50f5815200ebe165db7e7ac
d020637148e4f85b4a01dd17779d99680eb7ee83
> Openstack driver - re-map regions to providers rather than realms
> -----------------------------------------------------------------
>
> Key: DTACLOUD-488
> URL: https://issues.apache.org/jira/browse/DTACLOUD-488
> Project: DeltaCloud
> Issue Type: Bug
> Reporter: Marios Andreou
> Assignee: Marios Andreou
> Attachments:
> 0001-Deltacloud-OpenStack-driver-remap-regions-to-provide.patch,
> 0002-Deltacloud-remove-unused-resource_types-attribute-fr.patch
>
>
> In DTACLOUD-443 [1] we introduced support for Openstack 'regions' - for when
> Openstack service providers support different endpoints for services in
> different 'regions' in the serviceCatalog returned after authentication. The
> initial and current mapping in Deltacloud is from Openstack 'regions' to
> Deltacloud 'realms'. However, this has caused problems with the Openstack
> driver. For example, when you list Instances - which region's Instances
> should be retrieved? Similarly, when you create an Instance, if the client
> hasn't specified a 'realm_id' - which region should the Instance be created
> in? A slightly more complex problem is that not all services are supported in
> all regions - e.g. in the HPCloud Openstack deployment, region
> "region-a.geo-1" exposes only the 'object-store' service, whereas region
> "az-2.region-a.geo-1" exposes 'compute' and 'volume' services.
> A better solution IMO is to map 'regions' to 'providers'. This is what the
> attach patch does. You can specify the provider (i.e. 'region') you'd like to
> use in the API_PROVIDER URL - either when starting the deltacloud server or
> with the X-Deltacloud-Provider header in HTTP requests [2]. For example -
> when starting the deltacloud server and with the Keystone service @
> "https://keystone.service.org:35357/v2.0/"; and assuming you wish to manage
> resources in region 'region-1a' you would use:
> deltacloudd -i openstack -P
> "https://keystone.service.org:35357/v2.0/;region-1a";
> When you specify a region for the openstack driver, the collections exposed
> after a request to the Deltacloud entry point (e.g. /api) will only include
> those that are supported by the specified region (e.g. only object-store
> (buckets) or only compute (instances, images, realms, keys etc etc)). If you
> don't specify a region at all, but only provide the url for the keystone
> authentication service, then you will see no difference to current behaviour;
> the first region is picked from the returned serviceCatalog.
> Testing and comments please!
> marios
> [1] https://issues.apache.org/jira/browse/DTACLOUD-443
> [2] http://deltacloud.apache.org/drivers.html
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