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Initial setup on your local computer

AWS

Tell terraform to use a specific AWS account (which of course must already be setup with AWS API key etc.):

$ export AWS_PROFILE=lundogbendsen

Ansible

To avoid specifying the key all the time, put the location of the private key in ansible.cfg like

[defaults]
private_key_file = /Users/jps/.ssh/ec2-lundogbendsen-jp.pem

And stop Ansible asking for confirmation about hosts all the time:

$ export ANSIBLE_HOST_KEY_CHECKING=False

Docker

To interact with Docker (Swarm), make a SSH tunnel (in a separate terminal) to one of the swarm nodes:

$ ssh -i ~/.ssh/ec2-lundogbendsen-jp.pem -N -L 2375:/var/run/docker.sock \
      ubuntu@ec2-xx-xx-xx-xx.eu-west-1.compute.amazonaws.com

And tell Docker to use that tunnel:

$ unset DOCKER_TLS_VERIFY
$ unset DOCKER_CERT_PATH
$ unset DOCKER_MACHINE_NAME
$ export DOCKER_HOST=tcp://localhost:2375