Step 6. I see the heading for vip.yaml, but no contents for this file are displayed.
Thank you @pjpearce for bringing this to our attention. It seems the source file for the YAML code block was not found when the PDF was created. While this error is getting fixed, please use the vip.yaml file available in the SOLUTIONS package, in Lab 3.1 - download instructions are available on page 1.8. The file is ready to use with the four busybox containers and the required nodeSelector entry.