Following on from the scenario on creating overlay networks, this scenario explains how to create a encrypted overlay network. This allows you to encrypt network traffic between containers.
Create Encrypted Overlay Network
Step 1 - Initialise Swarm Mode
By default, Docker works as an isolated single-node. All containers are only deployed onto the engine. Swarm Mode turns it into a multi-host cluster-aware engine.
Task: Initialise Swarm Mode
To use the secrets functionality, Docker has to be in "Swarm Mode". This is enabled via
docker swarm init
Join Swarm Mode
Execute the command below on the second host to add it as a worker to the cluster.
token=$(ssh -o StrictHostKeyChecking=no [[HOST_IP]] "docker swarm join-token -q worker") && docker swarm join [[HOST_IP]]:2377 --token $token