Starting in 1.32.0, users can now use the Change Node Configuration feature through the UI to control Capacity as well as change the Anka Node to Drain Mode. This will allow VMs to finish their jobs, but not accept any new VM start tasks.

change node config drain mode

You can also use the API:

❯ curl -X POST http://anka.controller:8090/api/v1/node/config -d '{"node_id": "3c101836-9540-4733-9482-604d0c5fbe30", "drain_mode": true}'
{"status":"OK","message":""}