Script to create a docker swarm

make-docker-swarm.sh

#!/bin/bash

# quick script to start a docker swarm
# Justin Miller
# 14-02-17

# pre-requisites:
# set up public key authentication on all nodes
# ensure docker-engine 1.13 is installed and can be used by the admin user

# define manager
MANAGER='10.240.10.85'

# define other nodes
NODES=(
        '10.240.10.203'
        '10.240.10.237'
        # add other nodes here
)

# create swarm leader
ssh admin@$MANAGER "docker node ls && echo 'Node is already a swarm leader!' || docker swarm init --listen-addr $LEADER:2377"

# get join token
JOIN_TOKEN=$(ssh admin@$MANAGER "docker swarm join-token worker --quiet")

# join nodes
for NODE in ${NODES[*]}; do
        ssh admin@$NODE "docker swarm join --token $JOIN_TOKEN $MANAGER:2377"
done