$ cp .envrc.example .envirc
$ vi .envrc
$ direnv allow

$ bundle install --path vendor/bundle

$ cp user-data.yml.example user-data.yml

$ vagrant up

$ terraform plan   # Check your plan
$ terraform apply

$ bundle exec tugboat core-X -u core -p 2222  # SSH port is 2222 in this example

$ vi user-data.yml

$ vi cluster.tf

$ vagrant provision

$ vagrant ssh
core@core-X ~$ sudo coreos-cloudinit --from-file /var/lib/coreos-vagrant/vagrantfile-user-data

$ terraform remote config -backend-config "name=tomohiro/cluster"
$ terraform remote pull
$ terraform plan
$ terraform apply
$ terraform remote push