Docker Network role

Configures a Docker network.

Usage

Configure the role.

docker_network_name: example.com
docker_network_driver: overlay # defaults: bridge
docker_network_subnet: 172.18.0.0/16
docker_network_gateway: 172.18.0.1
docker_network_ipv6_subnet: 2001:db8:2::/64 # default: 2001:db8:1::/64
docker_network_ipv6_gateway: 2001:db8:2::1 # default: 2001:db8:1::1

And include it in your playbook.

- hosts: docker_network
  roles:
  - role: docker_network

Docs

IP tables

The docker-proxy ceates NAT routes in the ip tables. To list them run:

sudo iptables -t nat -L DOCKER -n -v

List all container ip addresses

This command shows the ip address for every container:

docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(docker ps -aq)

Connect all containers to network

Attach all containers to the example.com network:

docker ps -aq | xargs -I {} docker network connect example.com {}