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1. check the core service is running by typing command " netstat -an | grep LISTENING". In the controller node,it should contains listening port 8778(placement_api service), 8774(compute-service),9292(Image service),9696(network),5000(Identify service),5672(rabbitmq server), 11211( memcache server),35357(Identify service)

2.confirm that you have enough resources to allocate your instance, if enough resource available, then the issue comes from networking (neutron) and not from Nova itself. (Trace neutron logs for "PortBindingFailed")

3.check your host's hardware supports virtualization or not by  "virt-host-validate",if fails change to virt_type to qemu
1. 
  1. check the core service is running by typing command " netstat -an | grep LISTENING". In the controller node,it should contains listening port 8778(placement_api service), 8774(compute-service),9292(Image service),9696(network),5000(Identify service),5672(rabbitmq server), 11211( memcache server),35357(Identify service) service)

    2.confirm that you have enough resources to allocate your instance, if enough resource available, then the issue comes from networking (neutron) and not from Nova itself. (Trace neutron logs for "PortBindingFailed") "PortBindingFailed")

    3.check your host's hardware supports virtualization or not by issuing "virt-host-validate",if fails change to virt_type to qemu

qemu