Running RancherOS on DigitalOcean is not yet supported, but there is a rancheros image now available from the commandline tools, so you can run:
$ doctl.exe compute droplet create --image rancheros --region sfo1 --size 2gb --ssh-keys 0a:db:77:92:03:b5:b2:94:96:d0:92:6a:e1:da:cd:28 myrancherosvm
ID Name Public IPv4 Private IPv4 Public IPv6 Memory VCPUs Disk Region Image Status Tags
47145723 myrancherosvm 2048 2 40 sfo1 RacherOS v1.0.1-rc [UNSUPPORTED/BETA] new
$ doctl.exe compute droplet list
47145723 myrancherosvm 107.170.203.111 10.134.26.83 2604:A880:0001:0020:0000:0000:2750:0001 2048 2 40 sfo1 RacherOS v1.0.1-rc [UNSUPPORTED/BETA] active
ssh -i ~/.ssh/Sven.pem rancher@107.170.203.111
or use docker-machine:
$ docker-machine create -d digitalocean --digitalocean-access-token <your digital ocean token> --digitalocean-image rancheros --digitalocean-region sfo1 --digitalocean-size 2gb --digitalocean-ssh-user rancher sven-machine
Running pre-create checks...
Creating machine...
(sven-machine) Creating SSH key...
(sven-machine) Assuming Digital Ocean private SSH is located at ~/.ssh/id_rsa
(sven-machine) Creating Digital Ocean droplet...
(sven-machine) Waiting for IP address to be assigned to the Droplet...
Waiting for machine to be running, this may take a few minutes...
Detecting operating system of created instance...
Waiting for SSH to be available...
Detecting the provisioner...
Provisioning with rancheros...
Copying certs to the local machine directory...
Copying certs to the remote machine...
Setting Docker configuration on the remote daemon...
Checking connection to Docker...
Docker is up and running!
To see how to connect your Docker Client to the Docker Engine running on this virtual machine, run: C:\Users\svend\src\github.com\docker\machine\machine.exe env sven-machine
$ docker-machine ls
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
rancheros-100 - virtualbox Stopped Unknown
sven-machine - digitalocean Running tcp://104.131.156.5:2376 v17.03.1-ce
$ docker-machine ssh sven-machine
Enter passphrase for key '/c/Users/svend/.ssh/id_rsa':
[rancher@sven-machine ~]$
[rancher@sven-machine ~]$