Adding Compute Nodes to the Cell Database

Perform the following operations on the controller node.

1. Log in to the OpenStack CLI as the user admin.

   1	source /etc/keystone/admin-openrc

2. Check the database host.

   1	openstack compute service list --service nova-compute

3. Discover other compute nodes.

   1	su -s /bin/sh -c "nova-manage cell_v2 discover_hosts --verbose" nova

   If new compute nodes are discovered, run the following command on the controller node to register the new compute nodes:

   1	nova-manage cell_v2 discover_hosts

   Or, set a proper interval for the controller node to periodically discover new compute nodes. The procedure is as follows:

   1. Open the file.

      1	vi /etc/nova/nova.conf

   2. Press i to enter the insert mode and add the following content under [scheduler]:

      1 2	[scheduler] discover_hosts_in_cells_interval = 300

   3. Press Esc, type :wq!, and press Enter to save the file and exit.