Using devstack to setup openstack, but after restart the devstack services facing nova-compute status is enabled but state is down

I'm using devstatck to set up my openstack, then compute node and controller node in one server. After I solve my dashboard login problem because mysql have max byte transfer problem. I got a nova-conpute node problem.

this is my compute service status

this is my dashboard info

I also check my rabbitmq, I enable to log in the web management page use stackrabbit account, which means rabbitmq server should be fine, and also can be connected by nova-api. and also my compute node and controller node in one machine, which shouldn't be a time sync problem, because I saw some people said nova.config show the sync time is the 60s. but this should not be my problem. Anyone can help me solve the problem? or any suggest?