server create request
nova-scheduler
build instance
generate BDF forport and volume
return selected hosts
build req_spec
generate guest xml
get allocation candidates
cinder
create domain
when guest is running
nova-compute(DPU)
nova-api
setup instance group
transform bdm
check policy
filtered hosts
attach ports
update bdm db
create config drive
wait booting
nova-conductor
chosed hosts
libvirtd(Host)
create instance db
get host states
neutron
create volumes
spawn
create ports
select destinations
init vif db
check instance quota
generate context
dashboard
populate retry
ensure console log
attach volumes
populate instance db
claim resources
validate instance group
weighted hosts
