Problem with launch big image instance (1 GB+) on Ocata
Ocata release Two strong nodes setup controller and compute. Most services running on controller. There no problem to launch cirros or any small flavor like fedora( ~250 MB) The compute(M4 IBM server) have 128 GB memory and 1.4 TB disk available for instances, CPU `24 physical cores(2 sockets). The limit defined as 100 vCPU... All neutron agents up(ml2 , linux-bridge etc) and running same for nova services , the controller show hypervisor up and running compute node appear properly, keystone ok , glance service also.- everything run according to manual(RDO) without any warnings in log files. The only one problem not enough connections in Rabbitmq fixed , increased from 214 to 4096. Deploying any big -more then 1 GB image VM failed with "No valid host was found. There are not enough hosts available. Code 500" and lot of python exceptions... Seems like same unknown limitation s in nova.conf. Any suggestion more than welcomed.
What do you mean by a 1GB image VM? Is the image larger than 1GB or the instance?
The nova scheduler log should tell you if the placement service was unable to find a fitting compute host or if the filters rejected all hosts, and which filter. You may have to switch on debug logging.