ERROR: for flannel b'Unable to remove filesystem for 762c5f916d4e7a3d82b32e2a0bae615f87de6b5738fe9e33152468f10ecb4e60: remove /var/lib/docker-bootstrap/containers/762c5f916d4e7a3d82b32e2a0bae615f87de6b57
38fe9e33152468f10ecb4e60/shm: device or resource busy'
root@ip-172-31-16-53:/var/lib/juju/agents/unit-kubernetes-1/charm# hooks/etcd-relation-changed
ERROR: for flannel b'Unable to remove filesystem for 762c5f916d4e7a3d82b32e2a0bae615f87de6b5738fe9e33152468f10ecb4e60: remove /var/lib/docker-bootstrap/containers/762c5f916d4e7a3d82b32e2a0bae615f87de6b57 38fe9e33152468f10ecb4e60/shm: device or resource busy'
This appears to be related to: https://github.com/docker/docker/issues/17823