mirror of https://github.com/k3s-io/k3s
50 lines
1.5 KiB
Markdown
50 lines
1.5 KiB
Markdown
[](https://travis-ci.org/containerd/go-cni)
|
|
|
|
# go-cni
|
|
|
|
A generic CNI library to provide APIs for CNI plugin interactions. The library provides APIs to:
|
|
|
|
- Load CNI network config from different sources
|
|
- Setup networks for container namespace
|
|
- Remove networks from container namespace
|
|
- Query status of CNI network plugin initialization
|
|
|
|
go-cni aims to support plugins that implement [Container Network Interface](https://github.com/containernetworking/cni)
|
|
|
|
## Usage
|
|
```
|
|
func main() {
|
|
id := "123456"
|
|
netns := "/proc/9999/ns/net"
|
|
defaultIfName := "eth0"
|
|
// Initialize library
|
|
l = gocni.New(gocni.WithMinNetworkCount(2),
|
|
gocni.WithPluginConfDir("/etc/mycni/net.d"),
|
|
gocni.WithPluginDir([]string{"/opt/mycni/bin", "/opt/cni/bin"}),
|
|
gocni.WithDefaultIfName(defaultIfName))
|
|
|
|
// Load the cni configuration
|
|
err:= l.Load(gocni.WithLoNetwork,gocni.WithDefaultConf)
|
|
if err != nil{
|
|
log.Errorf("failed to load cni configuration: %v", err)
|
|
return
|
|
}
|
|
|
|
// Setup network for namespace.
|
|
labels := map[string]string{
|
|
"K8S_POD_NAMESPACE": "namespace1",
|
|
"K8S_POD_NAME": "pod1",
|
|
"K8S_POD_INFRA_CONTAINER_ID": id,
|
|
}
|
|
result, err := l.Setup(id, netns, gocni.WithLabels(labels))
|
|
if err != nil {
|
|
log.Errorf("failed to setup network for namespace %q: %v",id, err)
|
|
return
|
|
}
|
|
|
|
// Get IP of the default interface
|
|
IP := result.Interfaces[defaultIfName].IPConfigs[0].IP.String()
|
|
fmt.Printf("IP of the default interface %s:%s", defaultIfName, IP)
|
|
}
|
|
```
|