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moby--moby/libnetwork/cmd/readme_test
Jana Radhakrishnan d565a4df48 Push driver config during Init
Currently the driver configuration is pushed through a separate
api. This makes driver configuration possible at any arbitrary
time. This unncessarily complicates the driver implementation.
More importantly the driver does not get access to it's
configuration before it can do the handshake with libnetwork.
This make the internal drivers a little bit different to
external plugins which can get their configuration before the handshake
with libnetwork.

This PR attempts to fix that mismatch between internal drivers and
external plugins.

Signed-off-by: Jana Radhakrishnan <mrjana@docker.com>
2015-09-19 08:43:34 -07:00
..
readme.go Push driver config during Init 2015-09-19 08:43:34 -07:00

package main

import (
	"fmt"

	"github.com/docker/libnetwork"
	"github.com/docker/libnetwork/config"
	"github.com/docker/libnetwork/netlabel"
	"github.com/docker/libnetwork/options"
	"github.com/docker/libnetwork/types"
)

func main() {
	// Select and configure the network driver
	networkType := "bridge"

	// Create a new controller instance
	driverOptions := options.Generic{}
	genericOption := make(map[string]interface{})
	genericOption[netlabel.GenericData] = driverOptions
	controller, err := libnetwork.New(config.OptionDriverConfig(networkType, genericOption))
	if err != nil {
		return
	}

	// Create a network for containers to join.
	// NewNetwork accepts Variadic optional arguments that libnetwork and Drivers can use.
	network, err := controller.NewNetwork(networkType, "network1")
	if err != nil {
		return
	}

	// For each new container: allocate IP and interfaces. The returned network
	// settings will be used for container infos (inspect and such), as well as
	// iptables rules for port publishing. This info is contained or accessible
	// from the returned endpoint.
	ep, err := network.CreateEndpoint("Endpoint1")
	if err != nil {
		return
	}

	// Create the sandbox for the containr.
	sbx, err := controller.NewSandbox("container1",
		libnetwork.OptionHostname("test"),
		libnetwork.OptionDomainname("docker.io"))

	// A sandbox can join the endpoint via the join api.
	// Join accepts Variadic arguments which libnetwork and Drivers can use.
	err = ep.Join(sbx)
	if err != nil {
		return
	}

	// libnetwork client can check the endpoint's operational data via the Info() API
	epInfo, err := ep.DriverInfo()
	mapData, ok := epInfo[netlabel.PortMap]
	if ok {
		portMapping, ok := mapData.([]types.PortBinding)
		if ok {
			fmt.Printf("Current port mapping for endpoint %s: %v", ep.Name(), portMapping)
		}
	}
}