is there an automatic way to create an install.conf for OpenBSD autoinstall?

Question

The OpenBSD installer prompts the user whether to (I)install (U)pdate (A)utoinstall or (S)hell. If one selects the AutoInstall then the user is prompted for a URL where the install.conf file is located. Since I'm going to deploy a cluster of similar machines (physical and virtual) I would like to capture my installation choices from the console and then use those results to deploy all +1 instances. I've tried expect but it captures everything and creates HUGE files that do not resemble the examples. I would have thought that the installer would have created that file for the +1 as well as creating a record of the installation.

Answer 1

From the "Creating an installation response/answer file" section on this page: https://www.codemadness.org/openbsd-autoinstall.html:

The installer supports loading responses to the installation/upgrade questions from a simple text file. We can do a regular installation and copy the answers from the saved file to make an automated version of it.

Do a test installation, at the end of the installation or upgrade when asked the question:

Exit to (S)hell, (H)alt or (R)eboot?

Type S to go to the shell. Find the response file for an installation and copy it to some USB stick or write down the response answers:

cp /tmp/i/install.resp /mnt/usbstick/