Starting all the OpenStack services and restarting Keystone

See the documentation of your OpenStack distribution for information about what the services are and on how to start them. Many Linux distributions use the systemctl command or the service tools to control the services. For example, to start a service, run the following command:

systemctl start <service>

See the documentation of your OpenStack distribution for information about the names of the OpenStack services. Usually, they are all the services that begin with neutron-, openstack-, or httpd, which is the Horizon service.

If your distribution uses the systemctl command and OpenStack services with the mentioned names, you can use a sample script named control_services.sh to easily start the services. Review the script, adapt it to your environment if needed, and run the following commands:

./control_services.sh -o restart -k
./control_services.sh -o

These commands restart the Keystone service and start all the services. You must run the command on all the OpenStack servers.