Error adding network: no IP addresses available in network: cbr0”

cleanup

$ cd  /var/lib/cni/networks/kubenet
$ ls
10.180.2.2  10.180.2.3  10.180.2.4  last_reserved_ip
$ echo foobar > 10.180.2.244
$ for hash in $(tail -n +1 * | grep '^[A-Za-z0-9]*$' | cut -c 1-8); do if [ -z $(docker ps -a | grep $hash | awk '{print $1}') ]; then grep -ir $hash ./; fi; done 
./10.180.2.244:foobar

$ for hash in $(tail -n +1 * | grep '^[A-Za-z0-9]*$' | cut -c 1-8); do if [ -z $(docker ps -a | grep $hash | awk '{print $1}') ]; then grep -ilr $hash ./; fi; done | xargs rm