Chapter 21. Configuring Direct Deploy
When provisioning nodes, the director mounts the overcloud base operating system image on an iSCSI mount and then copies the image to disk on each node. Direct deploy is an alternative method that writes disk images from a HTTP location directly to disk on bare metal nodes.
21.1. Configuring the direct deploy interface on the undercloud
The iSCSI deploy interface is the default deploy interface. However, you can enable the direct deploy interface to download an image from a HTTP location to the target disk.
Your overcloud node memory
tmpfs must have at least 6GB of RAM.
Create or modify a custom environment file
/home/stack/undercloud_custom_env.yamland specify the
parameter_defaults: IronicDefaultDeployInterface: direct
By default, the Bare Metal Service (ironic) agent on each node obtains the image stored in the Object Storage Service (swift) through a HTTP link. Alternatively, Ironic can stream this image directly to the node through the
ironic-conductorHTTP server. To change the service providing the image, set the
parameter_defaults: IronicDefaultDeployInterface: direct IronicImageDownloadSource: http
Include the custom environment file in
DEFAULTsection of the
custom_env_files = /home/stack/undercloud_custom_env.yaml
Perform the undercloud installation:
$ openstack undercloud install