nova api

	A	B	C	D	E	F	G
1	compute API	cast, call, db only	valid state check before exec: vm_state \| task_state	state during exec (_ means no change)	eventual state if successful ( vm \| task \| power )	can be idempotent?	questions, problems, notes
2	create(max_count=1)	cast to sch	N/a	building \| various	active \| none \| pw	No	why max_count==1 check?
3	create(max_count>1)	call to sch	N/A	building \| various	active \| none \| pw	No	to be refactored to cast by comstud
4	ensure_default_security_group	db		_ \| _	_ \| _ \| _	Y
5	trigger_security_group_members_refresh	cast to many n-cpu, 'refresh_security_group_members'		_ \| _	_ \| _ \| _	Y
6	trigger_provider_fw_rules_refresh	cast to all n-cpu,'refresh_provider_fw_rules'		_ \| _	_ \| _ \| _	Y
7	add_security_group	cast, 'refresh_security_group_rules'		_ \| _	_ \| _ \| _	No	why only callable when power_state==Running?, why refresh all groups?
8	remove_security_group	cast, 'refresh_security_group_rules'		_ \| _	_ \| _ \| _
9	create_db_entry_for_new_instance	db
10	update	db
11	soft_delete	cast to n-cpu, 'power_off_instance'	active,shutoff,error	soft-delete\|powering_off	_ \| none \| pw	y
12	delete	call if in some migration state, cast to n-cpu, 'terminate_instance'	active,building,error,rescued,shutoff,stopped	_ \| deleting	_ \| none \| pw	y	why not all states, e.g. may get stuck by resize in _delete()
13	restore	cast to n-cpu, 'power_on_instance'	soft-delete	active \| powering_on	_ \| none \| pw	y
14	force_delete	call delete() impl	soft-delete	_ \| deleting		y
15	stop	cast if do_cast, stop_instance	active,shutoff,rescued \| None,resize_verify	active \| stopping	stopped \| none \| _	y
16	start	cast 'start_instance'	stopped,shutoff	first call stop(), then stopped \| starting	active \| none \| pw	y	why call stop() before start()
17	get_active_by_window	db
18	get	db
19	get_all	db
20	backup	cast, 'snapshot_instance'	active,shutoff	_ \| image_backup -> active \| _ \| pw	active \| none \| pw	No
21	snapshot	cast, 'snapshot_instance'	active,shutoff	_ \| image_snapshot	active \| none \| pw	No
22	reboot	cast, 'reboot_instance'	active,shutoff,rescued\| None, resize_verify	active \| rebooting[_hard]	active \| none \| pw
23	rebuild	cast, 'rebuild_instance'	active,shutoff \| None, resize_verify	rebuilding \| various	active \| none \| pw
24	revert_resize	cast, 'revert_resize' to dest	active,shutoff \| resize_verify	resizing \| resize_reverting	?
25	confirm_resize	cast, 'confirm_resize' to source	active,shutoff \| resize_verify	active \| None
26	resize	cast, 'prep_resize' to sch	active,shutoff \| None	resizing \| resize_prep
27	add_fixed_ip	cast, 'add_fixed_ip_to_instance'
28	remove_fixed_ip	cast, 'remove_fixed_ip_from_instance'	active,shutoff,rescued
29	pause	cast, 'pause_instance'	active,shutoff,rescued\| None, resize_verify	active \| pausing	paused \| none \| pw
30	unpause	cast, 'unpause_instance'	paused	paused \| unpausing	active \| none \| pw
31	suspend	cast, 'suspend_instance'	active,shutoff,rescued\| None, resize_verify	active \| suspending	suspended \| none \| pw
32	resume	cast, 'resume_instance'	suspended	suspended \| resuming	active \| none \| pw
33	rescue	cast, 'rescue_instance'	active,shutoff,stopped\|None, resize_verify	active \| rescuing	rescued \| none \| pw
34	unrescue	cast, 'unrescue_instance'	rescued	active \| unrescuing	active \| none \| pw
35	set_admin_password	cast, 'set_admin_password'	active	_ \| updating_password	_ \| none \| pw		pw must be running
36	inject_file	cast, 'inject_file'		_ \| _	_ \| _ \| _		pw must be running
37	get_vnc_console	call, consoleauth_topic,'authorize_console'		_ \| _			missing state check?
38	get_console_output	call, 'get_console_output'		_ \| _			missing state check?
39	lock	cast, 'lock_instance'		_ \| _
40	unlock	cast, 'unlock_instance'		_ \| _
41	get_lock	db
42	reset_network	cast, 'reset_network'		_ \| _
43	inject_network_info	cast, 'inject_network_info'		_ \| _
44	attach_volume	vol calls + cast, 'attach_volume'		_ \| _			missing state check?
45	detach_volume	vol calls + cast, 'detach_volume'		_ \| _			missing state check?
46	associate_floating_ip	net call associate_floating_ip		_ \| _
47	get_instance_metadata	db
48	delete_instance_metadata	db
49	update_instance_metadata	db
50	get_instance_faults	db
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53	in the compute node, initiated by periodic_task
54	_heal_instance_info_cache
55	_poll_rebooting_instances
56	_poll_rescued_instances
57	_poll_unconfirmed_resizes
58	_poll_bandwidth_usage
59	_sync_power_states						this one brutually update vm_state
60	_reclaim_queued_deletes
61	update_available_resource
62	_cleanup_running_deleted_instances
63	_run_image_cache_manager_pass
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