During the initial provision of a VDB the User Interfaces provides an opportunity to configure a template. In Delphix Engine version 18.104.22.168 and earlier, if this option is not used, following successful provision there are no further avenues to assign a template via the User Interface. The only way to assign a template which will persist with the virtual database (VDB) through a refresh is to complete an operation via the Command Line Interface (CLI).
Following are the steps required to configure a template against a VDB post-creation:
ssh into your delphix engine using delphix_admin delphix > source delphix source > ls delphix source > select "example_vdb" delphix source "example_vdb" > update delphix source "example_vdb" update* > set sourceconfigTemplate="vdb_template" delphix source "example_vdb" update* > commit
This issue is fully resolved in Delphix Engine 22.214.171.124 and later releases.