mirror of
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123 lines
3.4 KiB
Go
123 lines
3.4 KiB
Go
// +build windows
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package stats
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import (
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"fmt"
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"time"
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"github.com/Microsoft/hcsshim"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/klog"
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statsapi "k8s.io/kubernetes/pkg/kubelet/apis/stats/v1alpha1"
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)
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// listContainerNetworkStats returns the network stats of all the running containers.
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func (p *criStatsProvider) listContainerNetworkStats() (map[string]*statsapi.NetworkStats, error) {
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containers, err := hcsshim.GetContainers(hcsshim.ComputeSystemQuery{
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Types: []string{"Container"},
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})
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if err != nil {
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return nil, err
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}
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stats := make(map[string]*statsapi.NetworkStats)
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for _, c := range containers {
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cstats, err := fetchContainerStats(c)
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if err != nil {
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klog.V(4).Infof("Failed to fetch statistics for container %q with error '%v', continue to get stats for other containers", c.ID, err)
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continue
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}
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if len(cstats.Network) > 0 {
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stats[c.ID] = hcsStatsToNetworkStats(cstats.Timestamp, cstats.Network)
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}
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}
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return stats, nil
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}
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func fetchContainerStats(c hcsshim.ContainerProperties) (stats hcsshim.Statistics, err error) {
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var (
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container hcsshim.Container
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)
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container, err = hcsshim.OpenContainer(c.ID)
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if err != nil {
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return
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}
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defer func() {
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if closeErr := container.Close(); closeErr != nil {
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if err != nil {
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err = fmt.Errorf("failed to close container after error %v; close error: %v", err, closeErr)
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} else {
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err = closeErr
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}
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}
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}()
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return container.Statistics()
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}
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// hcsStatsToNetworkStats converts hcsshim.Statistics.Network to statsapi.NetworkStats
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func hcsStatsToNetworkStats(timestamp time.Time, hcsStats []hcsshim.NetworkStats) *statsapi.NetworkStats {
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result := &statsapi.NetworkStats{
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Time: metav1.NewTime(timestamp),
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Interfaces: make([]statsapi.InterfaceStats, 0),
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}
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adapters := sets.NewString()
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for _, stat := range hcsStats {
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iStat, err := hcsStatsToInterfaceStats(stat)
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if err != nil {
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klog.Warningf("Failed to get HNS endpoint %q with error '%v', continue to get stats for other endpoints", stat.EndpointId, err)
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continue
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}
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// Only count each adapter once.
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if adapters.Has(iStat.Name) {
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continue
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}
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result.Interfaces = append(result.Interfaces, *iStat)
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adapters.Insert(iStat.Name)
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}
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// TODO(feiskyer): add support of multiple interfaces for getting default interface.
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if len(result.Interfaces) > 0 {
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result.InterfaceStats = result.Interfaces[0]
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}
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return result
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}
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// hcsStatsToInterfaceStats converts hcsshim.NetworkStats to statsapi.InterfaceStats.
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func hcsStatsToInterfaceStats(stat hcsshim.NetworkStats) (*statsapi.InterfaceStats, error) {
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endpoint, err := hcsshim.GetHNSEndpointByID(stat.EndpointId)
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if err != nil {
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return nil, err
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}
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return &statsapi.InterfaceStats{
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Name: endpoint.Name,
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RxBytes: &stat.BytesReceived,
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TxBytes: &stat.BytesSent,
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}, nil
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}
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