Open Infrastructure

Reads / watches keys below /v1/vm (later probably as well /v1/networks?)

The JSON of the VM should contain a "status" field. On submit, the status should be "REQUESTED_NEW" (-> need to update ucloud-api).

Creating VM¶

The scheduler watches for changes on the key prefix. If the status is REQUEST_NEW, find a suitable host for deploying the VM to.
Update the status field to "SCHEDULED_DEPLOY". Also add a new field "host" that contains the hostname of the host the VM should be running on.

Deleting VM¶

The scheduler watches for changes on the key prefix. If the status is REQUEST_DELETE, do nothing -> ucloud-vm needs to react and will update the field.

APIs¶

ucloud scheduler only reacts on etcd changes and does not have a direct accessible API.