Docker Network Driver’s and Swarm Mode

One of the reasons Docker containers and services are so powerful is that you can connect them together using networks. There are different network driver’s to help to deploy your applications.

Network drivers

Bridge

The default network driver. If you don’t specify a driver, this is the type of network you are creating. Bridge networks are usually used when your applications run in standalone containers that need to communicate.

Host

For standalone containers, remove network isolation between the container and the Docker host, and use the host’s networking directly.

Overlay

Overlay networks connect multiple Docker daemons together and enable swarm services to communicate with each other.

Lets Start with network’s

1. Creating the swarm

$ docker swarm init --advertise-addr=<IP-ADDRESS-OF-MANAGER>

If the host only has one network interface, the --advertise-addr flag is optional.

2. Join the swarm

$ docker swarm --join --token <TOKEN> \
 --advertise-addr <IP-ADDRESS-OF-WORKER-2> \
 <IP-ADDRESS-OF-MANAGER>:2377

3. List of all nodes

$ docker node ls

You can also use the --filter flag to filter by role:

$ docker node ls --filter role=manager

4. List of all docker networks

$ docker network ls

If you create swarm services and do specify a network to connected.