/
sriov.go
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/
sriov.go
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// Copyright 2021 Antrea Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cniserver
import (
"context"
"fmt"
"net"
"path"
"time"
current "github.com/containernetworking/cni/pkg/types/100"
"google.golang.org/grpc"
grpcinsecure "google.golang.org/grpc/credentials/insecure"
"k8s.io/klog/v2"
// Version v1 of the Kubelet API was introduced in K8s v1.20.
// Using version v1alpha1 instead to support older K8s versions.
podresourcesv1alpha1 "k8s.io/kubelet/pkg/apis/podresources/v1alpha1"
"antrea.io/antrea/pkg/agent/util"
)
const (
kubeletPodResourcesPath = "/var/lib/kubelet/pod-resources"
kubeletSocket = "kubelet.sock"
connectionTimeout = 10 * time.Second
)
type KubeletPodResources struct {
resources []*podresourcesv1alpha1.PodResources
}
// GetPodContainerDeviceIDs returns the device IDs assigned to a Pod's containers.
func GetPodContainerDeviceIDs(podName string, podNamespace string) ([]string, error) {
ctx, cancel := context.WithTimeout(context.Background(), connectionTimeout)
defer cancel()
conn, err := grpc.DialContext(
ctx,
path.Join(kubeletPodResourcesPath, kubeletSocket),
grpc.WithTransportCredentials(grpcinsecure.NewCredentials()),
grpc.WithContextDialer(func(ctx context.Context, addr string) (conn net.Conn, e error) {
return util.DialLocalSocket(addr)
}),
)
if err != nil {
return []string{}, fmt.Errorf("error getting the gRPC client for Pod resources: %v", err)
}
defer conn.Close()
client := podresourcesv1alpha1.NewPodResourcesListerClient(conn)
if client == nil {
return []string{}, fmt.Errorf("error getting the lister client for Pod resources")
}
podResources, err := client.List(ctx, &podresourcesv1alpha1.ListPodResourcesRequest{})
if err != nil {
return []string{}, fmt.Errorf("error getting the Pod resources: %v %v", podResources, err)
}
var podDeviceIDs []string
var kpr KubeletPodResources
kpr.resources = podResources.GetPodResources()
for _, pr := range kpr.resources {
if pr.Name == podName && pr.Namespace == podNamespace {
for _, ctr := range pr.Containers {
for _, dev := range ctr.Devices {
podDeviceIDs = append(podDeviceIDs, dev.DeviceIds...)
}
}
}
}
klog.V(2).Infof("Pod container device IDs of %s/%s are: %v", podNamespace, podName, podDeviceIDs)
return podDeviceIDs, nil
}
// ConfigureSriovSecondaryInterface adds Secondary Interface support.
// Limitation: only SR-IOV interface is supported as of now.
func (pc *podConfigurator) ConfigureSriovSecondaryInterface(
podName string,
podNameSpace string,
containerID string,
containerNetNS string,
containerIFDev string,
mtu int,
podSriovVFDeviceID string,
result *current.Result,
) error {
if podSriovVFDeviceID == "" {
return fmt.Errorf("error getting the Pod SR-IOV VF device ID")
}
err := pc.ifConfigurator.configureContainerLink(podName, podNameSpace, containerID, containerNetNS, containerIFDev, mtu, "", podSriovVFDeviceID, result, nil)
if err != nil {
return err
}
hostIface := result.Interfaces[0]
containerIface := result.Interfaces[1]
if err = pc.ifConfigurator.advertiseContainerAddr(containerNetNS, containerIface.Name, result); err != nil {
return fmt.Errorf("failed to advertise IP address for container %s: %v", containerID, err)
}
klog.Infof("Configured interfaces for container %s; hostIface: %+v, containerIface: %+v", containerID, hostIface, containerIface)
return nil
}