mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
100 lines
3.7 KiB
Markdown
100 lines
3.7 KiB
Markdown
# libnetwork - networking for containers
|
|
|
|
[](https://circleci.com/gh/docker/libnetwork/tree/master) [](https://coveralls.io/r/docker/libnetwork) [](https://godoc.org/github.com/docker/libnetwork) [](https://goreportcard.com/report/github.com/docker/libnetwork)
|
|
|
|
Libnetwork provides a native Go implementation for connecting containers
|
|
|
|
The goal of libnetwork is to deliver a robust Container Network Model that provides a consistent programming interface and the required network abstractions for applications.
|
|
|
|
#### Design
|
|
Please refer to the [design](docs/design.md) for more information.
|
|
|
|
#### Using libnetwork
|
|
|
|
There are many networking solutions available to suit a broad range of use-cases. libnetwork uses a driver / plugin model to support all of these solutions while abstracting the complexity of the driver implementations by exposing a simple and consistent Network Model to users.
|
|
|
|
|
|
```go
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
|
|
"github.com/docker/docker/pkg/reexec"
|
|
"github.com/docker/libnetwork"
|
|
"github.com/docker/libnetwork/config"
|
|
"github.com/docker/libnetwork/netlabel"
|
|
"github.com/docker/libnetwork/options"
|
|
)
|
|
|
|
func main() {
|
|
if reexec.Init() {
|
|
return
|
|
}
|
|
|
|
// 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 {
|
|
log.Fatalf("libnetwork.New: %s", err)
|
|
}
|
|
|
|
// 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 {
|
|
log.Fatalf("controller.NewNetwork: %s", err)
|
|
}
|
|
|
|
// 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 {
|
|
log.Fatalf("network.CreateEndpoint: %s", err)
|
|
}
|
|
|
|
// Create the sandbox for the container.
|
|
// NewSandbox accepts Variadic optional arguments which libnetwork can use.
|
|
sbx, err := controller.NewSandbox("container1",
|
|
libnetwork.OptionHostname("test"),
|
|
libnetwork.OptionDomainname("docker.io"))
|
|
if err != nil {
|
|
log.Fatalf("controller.NewSandbox: %s", err)
|
|
}
|
|
|
|
// A sandbox can join the endpoint via the join api.
|
|
err = ep.Join(sbx)
|
|
if err != nil {
|
|
log.Fatalf("ep.Join: %s", err)
|
|
}
|
|
|
|
// libnetwork client can check the endpoint's operational data via the Info() API
|
|
epInfo, err := ep.DriverInfo()
|
|
if err != nil {
|
|
log.Fatalf("ep.DriverInfo: %s", err)
|
|
}
|
|
|
|
macAddress, ok := epInfo[netlabel.MacAddress]
|
|
if !ok {
|
|
log.Fatalf("failed to get mac address from endpoint info")
|
|
}
|
|
|
|
fmt.Printf("Joined endpoint %s (%s) to sandbox %s (%s)\n", ep.Name(), macAddress, sbx.ContainerID(), sbx.Key())
|
|
}
|
|
```
|
|
|
|
## Future
|
|
Please refer to [roadmap](ROADMAP.md) for more information.
|
|
|
|
## Contributing
|
|
|
|
Want to hack on libnetwork? [Docker's contributions guidelines](https://github.com/docker/docker/blob/master/CONTRIBUTING.md) apply.
|
|
|
|
## Copyright and license
|
|
Code and documentation copyright 2015 Docker, inc. Code released under the Apache 2.0 license. Docs released under Creative commons.
|