Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible. <class 'keystoneauth1.exceptions.discovery.DiscoveryFailure'> (HTTP 500) (Request-ID: req-0971807f-dc3f-4882-8a1f-c7c24b86aa0e)

[Mahesh km]

 we are running openstack on 22.04 qemu .Cant create an instance on the
  self-service network (we have created flavor,attached network list,
  security group,keypair,rule, but instanace is not creating )[command
  used "openstack server create --flavor m1.nano --image cirros --nic
  net-id=1fbb66da-7362-4ba9-851b-f9251b3e12e2 --security-group
  424fd166-6252-4118-97d6-7062aad3c9eb --key-name mykey
  inbinternet"].

[Artom Lifshitz (notartom)]

Thanks for the bug report and the logs. It look like your Keystone service, which Nova needs to authenticate to when communicating with either Neutron or Ciner for ports and volumes, respectively, is down or unreachable. Please investigate the state of your Keystone service.

[Launchpad Janitor (janitor)]

[Expired for OpenStack Compute (nova) because there has been no activity for 60 days.]