#option 1: copy and paste this into ssh to install docker engine
# NOTE: update --label=owner=YOURNAME below if you want to easily identify yours

apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D && \
mkdir -p /etc/apt/sources.list.d && \
echo deb https://apt.dockerproject.org/repo ubuntu-xenial main > /etc/apt/sources.list.d/docker.list && \
printf 'net.ipv4.neigh.default.gc_thresh1 = 30000\nnet.ipv4.neigh.default.gc_thresh2 = 32000\nnet.ipv4.neigh.default.gc_thresh3 = 32768' >> /etc/sysctl.conf && \
sysctl -p && \
service lxcfs stop && apt-get remove -y -q lxc-common lxcfs lxd lxd-client && \
apt-get update -q && apt-get install -y -q linux-image-extra-$(uname -r) linux-image-extra-virtual && \
apt-get install -y -q docker-engine=1.12.3* && systemctl start docker.service && \
mkdir -p /etc/systemd/system/docker.service.d && \
printf '[Service]\nExecStart=\nExecStart=/usr/bin/dockerd -H fd:// --label=owner=YOURNAME --storage-driver aufs' > /etc/systemd/system/docker.service.d/options.conf && \
systemctl daemon-reload && \
systemctl restart docker.service && \
docker swarm join \
    --advertise-addr $(curl http://169.254.169.254/latest/meta-data/public-ipv4) \
    --token SWMTKN-1-29tx6z2k8zmsbt9z2c2ay54jc9ce2l94ixhmmagveifv3pp4fa-5e8i9gugpb9b4bmi9vrp7m5su \
    67.205.160.45:2377