Docker: prefer overlay, fall back to aufs
Docker: prefer overlay, fall back to aufs

kris-nova/kops,zytek/kops,DualSpark/kops,leandrocr/kops,pdh/kops,ikropotov/kops,kris-nova/kops,BradErz/kops,sp-borja-juncosa/kops,justinsb/kops,sethpollack/kops,DualSpark/kops,zytek/kops,austinmoore-/kops,zytek/kops,leandrocr/kops,leandrocr/kops,WillemMali/kops,luomiao/kops,blakebarnett/kops,reactiveops/kops,tsupertramp/kops,dacohen/kops,robinpercy/kops,pdh/kops,WillemMali/kops,reactiveops/kops,mad01/kops,kris-nova/kops,sethpollack/kops,luomiao/kops,tsupertramp/kops,robinpercy/kops,faraazkhan/kops,kubernetes/kops,sethpollack/kops,MadDogTechnology/kops,kubernetes/kops,gambol99/kops,justinsb/kops,mad01/kops,BradErz/kops,ikropotov/kops,reactiveops/kops,aledbf/kops,mad01/kops,jnewland/kops,faraazkhan/kops,jnewland/kops,reactiveops/kops,sp-borja-juncosa/kops,pdh/kops,blakebarnett/kops,WillemMali/kops,aledbf/kops,ikropotov/kops,robinpercy/kops,tsupertramp/kops,sp-borja-juncosa/kops,chrislovecnm/kops,dacohen/kops,austinmoore-/kops,robinpercy/kops,DualSpark/kops,sp-borja-juncosa/kops,WillemMali/kops,andrewsykim/kops,gambol99/kops,andrewsykim/kops,jnewland/kops,blakebarnett/kops,austinmoore-/kops,andrewsykim/kops,pdh/kops,leandrocr/kops,sethpollack/kops,luomiao/kops,tsupertramp/kops,aledbf/kops,DualSpark/kops,andrewsykim/kops,zytek/kops,MadDogTechnology/kops,MadDogTechnology/kops,gambol99/kops,faraazkhan/kops,justinsb/kops,chrislovecnm/kops,kubernetes/kops,dacohen/kops,aledbf/kops,luomiao/kops,austinmoore-/kops,kris-nova/kops,mad01/kops,gambol99/kops,blakebarnett/kops,MadDogTechnology/kops,faraazkhan/kops,BradErz/kops,chrislovecnm/kops,chrislovecnm/kops,ikropotov/kops,BradErz/kops,dacohen/kops