My nodes Digital Ocean are UNREACHABLE from docker cloud
I have worked with docker cloud for a month. My nodes are created as described at https://docs.docker.com/docker-cloud/infrastructure/link-do/ for a Digital Ocean account. But I’ve decided to update the operating system of the node (I access through ssh):
$ sudo apt update && sudo apt upgrade
Then increase the swap memory as described here: https://www.digitalocean.com/community/tutorials/how-to-add-swap-on-ubuntu-14-04
I finally reboot the system:
$ Sudo reboot
But after this my system is already inaccessible from Docker cloud, status nodes is UNREACHABLE
$ docker version
Docker version Client: Version: 1.11.2-cs5 API version: 1.23 Go version: go1.5.4 Git commit: d364ea1 Built: Tue Sep 13 15:26:43 2016 OS / Arch: linux / amd64 Can not connect to the Docker daemon. Is the docker daemon running on this host?
How can I recover these nodes? I appreciate your help.