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
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)
}
The go-cni is a containerd sub-project, licensed under the Apache 2.0 license. As a containerd sub-project, you will find the:
information in our containerd/project
repository.