Fixes bug 844160
Makes the servers create API call work with all schedulers, removes
'zone boot', and folds create_instance_helper back into servers
controller.
Notable changes:
1) compute API's create_at_all_once has been removed. It was only used
by zone boot.
2) compute API's create() no longer creates Instance DB entries. The
schedulers now do this. This makes sense, as only the schedulers will
know where the instances will be placed. They could be placed locally or
in a child zone. However, this comes at a cost. compute_api.create() now
does a 'call' to the scheduler instead of a 'cast' in most cases (* see
below). This is so it can receive the instance ID(s) that were created
back from the scheduler. Ultimately, we probably need to figure out a
way to generate UUIDs before scheduling and return only the information
we know about an instance before it is actually scheduled and created.
We could then revert this back to a cast. (Or maybe we always return a
reservation ID instead of an instance.)
3) scheduler* calls do not return a host now. They return a value
that'll be returned if the caller does an rpc.call(). The casts to
hosts are now done by the scheduler drivers themselves.
4) There's been an undocumented feature in the OS API to allow multiple
instances to be built. I've kept it.
5) If compute_api.create() is creating multiple instances, only a single
call is made to the scheduler, vs the old way of sending many casts. All
schedulers now check how many instances have been requested.
6) I've added an undocumented option 'return_reservation_id' when
building. If set to True, only a reservation ID is returned to the API
caller, not the instance. This essentially gives you the old 'nova
zone-boot' functionality.
7) It was requested I create a stub for a zones extension, so you'll see
the empty extension in here. We'll move some code to it later.
8) Fixes an unrelated bug that merged into trunk recently where zones DB
calls were not being done with admin context always, anymore.
9) Scheduler calls were always done with admin context when they should
elevate only when needed.
10) Moved stub_network flag so individual tests can run again.
* Case #6 above doesn't wait for the scheduler response with instance
IDs. It does a 'cast' instead.
Change-Id: Ic040780a2e86d7330e225f14056dadbaa9fb3c7e
Adds support for hypervisor vmware ESX/ESXi server in OpenStack (Nova).
Key features included are,
1) Support for FLAT and VLAN networking model
2) Support for Guest console access through VMware vmrc
3) Integrated with Glance service for image storage and retrival
Documentation: A readme file at "doc/source/vmwareapi_readme.rst" encapsulates configuration/installation instructions required to use this module/feature.
2) Update document so that copy right notice doesn't appear in generated document
3) Now using self.flag(...) instead of setting the flags like FLAGS.vmwareapi_username by direct assignment.
4) Added the missing double quote at the end a string in vim_util.py
* Corrected docstrings as per pep0257 recommentations.
* Stream-lined the comments.
* Updated code with locals() where ever applicable.
* VIM : It stands for VMware Virtual Infrastructure Methodology. We have used the terminology from VMware. we have added a question in FAQ inside vmware_readme.rst in doc/source
* New fake db: vmwareapi fake module uses a different set of fields and hence the structures required are different. Ex: bridge : 'xenbr0' does not hold good for VMware environment and bridge : 'vmnic0' is used instead. Also return values varies, hence went for implementing separate fake db.
* Now using eventlet library instead and removed io_utils.py from branch.
* Now using glance.client.Client instead of homegrown code to talk to Glance server to handle images.
* Corrected all mis-spelled function names and corresponding calls. Yeah, an auto-complete side-effect!
Chris Behrens