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 o penstack 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