k8s: don't allow adding to cluster for now -- could cause subtle breakage
k8s: don't allow adding to cluster for now -- could cause subtle breakage

DrXyzzy/smc,tscholl2/smc,DrXyzzy/smc,sagemathinc/smc,tscholl2/smc,sagemathinc/smc,tscholl2/smc,DrXyzzy/smc,sagemathinc/smc,tscholl2/smc,sagemathinc/smc,tscholl2/smc,DrXyzzy/smc