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Docker network driver plugins

This document describes Docker Engine network driver plugins generally
available in Docker Engine. To view information on plugins
managed by Docker Engine, refer to Docker Engine plugin system.

Docker Engine network plugins enable Engine deployments to be extended to
support a wide range of networking technologies, such as VXLAN, IPVLAN, MACVLAN
or something completely different. Network driver plugins are supported via the
LibNetwork project. Each plugin is implemented as a “remote driver” for
LibNetwork, which shares plugin infrastructure with Engine. Effectively, network
driver plugins are activated in the same way as other plugins, and use the same
kind of protocol.

Network plugins and swarm mode

Legacy plugins do not work in swarm mode. However,
plugins written using the v2 plugin system do work in swarm mode, as
long as they are installed on each swarm worker node.

Use network driver plugins

The means of installing and running a network driver plugin depend on the
particular plugin. So, be sure to install your plugin according to the
instructions obtained from the plugin developer.

Once running however, network driver plugins are used just like the built-in
network drivers: by being mentioned as a driver in network-oriented Docker
commands. For example,

$
 
docker network create --driver weave mynet

Some network driver plugins are listed in plugins

The mynet network is now owned by weave, so subsequent commands
referring to that network will be sent to the plugin,

$
 
docker run --network
=mynet busybox top

Find network plugins

Network plugins are written by third parties, and are published by those
third parties, either on
Docker Store
or on the third party’s site.

Write a network plugin

Network plugins implement the Docker plugin API and the network
plugin protocol

Network plugin protocol

The network driver protocol, in addition to the plugin activation call, is
documented as part of libnetwork:
https://github.com/moby/moby/blob/master/libnetwork/docs/remote.md.

To interact with the Docker maintainers and other interested users, see the IRC channel #docker-network.