This commit implements an optimized OpenStackDriver that builds the
endpoints for subclouds directly using their management IPs instead of
retrieving them from the keystone database. Subcloud endpoints will be
removed from Keystone due to performance reasons in a future commit.
- The driver now accepts a fetch_subcloud_ips function as an argument.
- This function retrieves a dictionary of subcloud region names to
their management IPs (without a region argument) or a specific
subcloud's management IP (with a region argument).
- Dcmanager services and dcorch should implement their own
fetch_subcloud_ips function to provide the driver with subcloud
IP information.
This approach improves performance and prepares for the removal of
subcloud endpoints from Keystone.
NOTE: The original OpenStackDriver, KeystoneClient and EndpointCache
will be removed in a future commit, after the DC services are updated
to use the new optimized OpenStackDriver. The optimized one will be
integrated with the DC services in separate commits.
Test Plan:
Remove the subcloud endpoints from the keystone DB, modify the
dcmanager-audit service to use the new classes and then run the
following tests:
1. PASS - Verify that audit is able to get both the RegionOne and
subclouds endpoints without issues using the new driver.
2. PASS - Verify that the hourly token refresh only triggers the
refresh of central region token and endpoints.
3. PASS - Verify that when adding a new subcloud, the endpoint cache
is updated to include the endpoints for the new subcloud.
Story: 2011106
Task: 50035
Change-Id: I146592eb17f6a5433eae25f20e8de2f01c813055
Signed-off-by: Gustavo Herzmann <gustavo.herzmann@windriver.com>
ffc92c1d10