Create Instance on Specific Host Using CLI

Problem

• By default, selecting a host to launch instances is done by nova-scheduler.
• There are use-cases where nova-scheduler can be forced to create instances on a specific host.

Environment

• Platform9 Managed OpenStack - All Versions

Procedure

1. Identify a host and its availability zone.
   

   $ openstack host list

2. Pass the parameter --availability-zone to the openstack server create command. For example

   $ openstack server create \
   --image <IMAGE_UUID>  \
   --flavor <FLAVOR_UUID> \
   --key-name <key ID>      \
   --availability-zone <ZONE_NAME>:<HOST_UUID> \
   --nic net-id=<NETWORK_UUID> \
   <INSTANCE_NAME>

Additional Information

 OpenStack Availability Zones