[ovirt-users] obtain spm id (host id) from engine using api

[joost at familiealbers.nl]

in ovirt engine the table.

vds_spm_id_map

holds the ids used in spm election.

engine_20150824095956=# select * from vds_spm_id_map ;
            storage_pool_id            | vds_spm_id |                
vds_id
--------------------------------------+------------+--------------------------------------
  144fb47d-b38c-4bb7-867b-373d7ba9f0a9 |          1 | 
313ed02c-8029-4fb3-ba1c-5b3c9902ddb1
  144fb47d-b38c-4bb7-867b-373d7ba9f0a9 |          2 | 
7fdebf8a-1503-4b54-9681-0201ee330381

these particular id's seem to be added when a vds is added to the 
engine or when the storage pool is first setup.

I would like to be able to obtain this nr (in my case its generally 1 
or 2 as i have two hosts per dc / cluster) through an api or even better 
from the hosts itself.

When testing I connect to the storage pools using the api and its 
important the hostid used when making this api call is correct or bad 
things happen.

I have been searching high and low to no avail. In understand the 
engine is in charge here but i really would be helped if this values can 
be obtained without going into the db.

As i am continuously rebuilding dc's / storage pools and hosts i cannot 
keep track of when which host is installed hence the need to know the 
spm_id as listed.

It might be i am all wrong but the when i use the vds_spm_id as listed 
i can connect the host to the storage pools using the api.

thanks Joost