How do I clean parvo virus off a kennel

Parvo virus is a very hardy virus, if you have had Parvo in your home you will need to clean more than just the kennel.
I would begin by throwing out bedding, toys, bowls, collars, etc.
Just to be on the safe side.
You will need to clean all hard and porous surfaces with a bleach/water solution. I've always trusted the 1 part bleach to 10 parts water, however, the website I will post states that 1/32 is sufficient.
Parvo virus can live in the invironment for a long time given climate and weather.
While complete kill of the virus is virtually impossible, you can take steps to decrease it.
Rember also that it can be transmitted not only from dog to dog, but from infected objects, including your clothes and shoes.
So those will need to washed thoroughly.
Also, very important not to introduce a new pup until a good cleaning has been performed.
http://www.aspcapro.org/canine-parvovirus.php

Before bringing home another dog, and especially if introducing a new pup, in addition to making sure everything is cleaned, as Lady Sam says, (like how can you guarantee that outdoors?)is to NOT bring a new puppy into your environment until it has had the proper series of vaccinations to ASSURE, as much as anyone is able to do, that adequate immunity has been established in the pup. The precautionary vaccination protocol for Parvo puppy immunization is somewhat different from other diseases.

Make sure an older dog is adequately vaccinated as well. This is what I would do if I had lost a pet to Parvo and didn't want to watch another, especially a pup, go through it as well.