Here's a list of tasks that were done when we were removing Krunk:
Run vos listvol HOST to find existing volumes on the server.
Run vos remove -server HOST -id NAME|ID for each of them (note: really removes data! It's ok in case of replicated volumes whose r/w is kept elsewhere)
Run vos changeaddr -oldaddr HOST_IP -remove
Edit /etc/openafs/CellServDB on all machines to remove mention of HOST
Run bos shutdown krunk
Edit /afs/hcoop.net/common/etc/scripts/hcoop-kprop and remove mention of HOST, apply with DOMTOOL_USER=hcoop domtool hcoop.net
If the cell is published with grand.central.org, mail cellservdb@central.org and tell them the new CellServDB configuration