Revert "Add network stats for Windows containers"

This reverts commit 9cf38de44b.

pkg/kubelet/stats/BUILD

@@ -5,8 +5,6 @@ go_library(
     srcs = [
         "cadvisor_stats_provider.go",
         "cri_stats_provider.go",
-        "cri_stats_provider_unsupported.go",
-        "cri_stats_provider_windows.go",
         "helper.go",
         "log_metrics_provider.go",
         "stats_provider.go",
@@ -34,12 +32,7 @@ go_library(
         "//vendor/github.com/google/cadvisor/info/v1:go_default_library",
         "//vendor/github.com/google/cadvisor/info/v2:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
-    ] + select({
+    ],
-        "@io_bazel_rules_go//go/platform:windows": [
-            "//vendor/github.com/Microsoft/hcsshim:go_default_library",
-        ],
-        "//conditions:default": [],
-    }),
 )
 
 filegroup(

pkg/kubelet/stats/cri_stats_provider.go

@@ -26,10 +26,11 @@ import (
 	"time"
 
 	cadvisorfs "github.com/google/cadvisor/fs"
+	"k8s.io/klog"
+
 	cadvisorapiv2 "github.com/google/cadvisor/info/v2"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
-	"k8s.io/klog"
 	internalapi "k8s.io/kubernetes/pkg/kubelet/apis/cri"
 	runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
 	statsapi "k8s.io/kubernetes/pkg/kubelet/apis/stats/v1alpha1"
@@ -134,12 +135,6 @@ func (p *criStatsProvider) ListPodStats() ([]statsapi.PodStats, error) {
 	}
 	caInfos := getCRICadvisorStats(allInfos)
 
-	// get network stats for containers.
-	containerNetworkStats, err := p.listContainerNetworkStats()
-	if err != nil {
-		return nil, fmt.Errorf("failed to list container network stats: %v", err)
-	}
-
 	for _, stats := range resp {
 		containerID := stats.Attributes.Id
 		container, found := containerMap[containerID]
@@ -163,7 +158,7 @@ func (p *criStatsProvider) ListPodStats() ([]statsapi.PodStats, error) {
 
 		// Fill available stats for full set of required pod stats
 		cs := p.makeContainerStats(stats, container, &rootFsInfo, fsIDtoInfo, podSandbox.GetMetadata().GetUid())
-		p.addPodNetworkStats(ps, podSandboxID, caInfos, cs, containerNetworkStats[podSandboxID])
+		p.addPodNetworkStats(ps, podSandboxID, caInfos, cs)
 		p.addPodCPUMemoryStats(ps, types.UID(podSandbox.Metadata.Uid), allInfos, cs)
 
 		// If cadvisor stats is available for the container, use it to populate
@@ -373,21 +368,11 @@ func (p *criStatsProvider) addPodNetworkStats(
 	podSandboxID string,
 	caInfos map[string]cadvisorapiv2.ContainerInfo,
 	cs *statsapi.ContainerStats,
-	netStats *statsapi.NetworkStats,
 ) {
 	caPodSandbox, found := caInfos[podSandboxID]
 	// try get network stats from cadvisor first.
 	if found {
-		networkStats := cadvisorInfoToNetworkStats(ps.PodRef.Name, &caPodSandbox)
+		ps.Network = cadvisorInfoToNetworkStats(ps.PodRef.Name, &caPodSandbox)
-		if networkStats != nil {
-			ps.Network = networkStats
-			return
-		}
-	}
-
-	// Not found from cadvisor, get from netStats.
-	if netStats != nil {
-		ps.Network = netStats
 		return
 	}
 

pkg/kubelet/stats/cri_stats_provider_unsupported.go

@@ -1,29 +0,0 @@
-// +build !windows
-
-/*
-Copyright 2018 The Kubernetes 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 stats
-
-import (
-	statsapi "k8s.io/kubernetes/pkg/kubelet/apis/stats/v1alpha1"
-)
-
-// listContainerNetworkStats returns the network stats of all the running containers.
-func (p *criStatsProvider) listContainerNetworkStats() (map[string]*statsapi.NetworkStats, error) {
-	// Always return nil for unsupported platforms.
-	return nil, nil
-}

pkg/kubelet/stats/cri_stats_provider_windows.go

@@ -1,91 +0,0 @@
-// +build windows
-
-/*
-Copyright 2018 The Kubernetes 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 stats
-
-import (
-	"time"
-
-	"github.com/Microsoft/hcsshim"
-
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/klog"
-	statsapi "k8s.io/kubernetes/pkg/kubelet/apis/stats/v1alpha1"
-)
-
-// listContainerNetworkStats returns the network stats of all the running containers.
-func (p *criStatsProvider) listContainerNetworkStats() (map[string]*statsapi.NetworkStats, error) {
-	containers, err := hcsshim.GetContainers(hcsshim.ComputeSystemQuery{
-		Types: []string{"Container"},
-	})
-	if err != nil {
-		return nil, err
-	}
-
-	stats := make(map[string]*statsapi.NetworkStats)
-	for _, c := range containers {
-		container, err := hcsshim.OpenContainer(c.ID)
-		if err != nil {
-			klog.Warningf("Failed to open container %q with error '%v', continue to get stats for other containers", c.ID, err)
-			continue
-		}
-
-		cstats, err := container.Statistics()
-		if err != nil {
-			klog.Warningf("Failed to get statistics for container %q with error '%v', continue to get stats for other containers", c.ID, err)
-			continue
-		}
-
-		if len(cstats.Network) > 0 {
-			stats[c.ID] = hcsStatsToNetworkStats(cstats.Timestamp, cstats.Network)
-		}
-	}
-
-	return stats, nil
-}
-
-// hcsStatsToNetworkStats converts hcsshim.Statistics.Network to statsapi.NetworkStats
-func hcsStatsToNetworkStats(timestamp time.Time, hcsStats []hcsshim.NetworkStats) *statsapi.NetworkStats {
-	result := &statsapi.NetworkStats{
-		Time:       metav1.NewTime(timestamp),
-		Interfaces: make([]statsapi.InterfaceStats, 0),
-	}
-
-	for _, stat := range hcsStats {
-		iStat := hcsStatsToInterfaceStats(stat)
-		if iStat != nil {
-			result.Interfaces = append(result.Interfaces, *iStat)
-		}
-	}
-
-	// TODO(feiskyer): add support of multiple interfaces for getting default interface.
-	if len(result.Interfaces) > 0 {
-		result.InterfaceStats = result.Interfaces[0]
-	}
-
-	return result
-}
-
-// hcsStatsToInterfaceStats converts hcsshim.NetworkStats to statsapi.InterfaceStats.
-func hcsStatsToInterfaceStats(stat hcsshim.NetworkStats) *statsapi.InterfaceStats {
-	return &statsapi.InterfaceStats{
-		Name:    stat.EndpointId,
-		RxBytes: &stat.BytesReceived,
-		TxBytes: &stat.BytesSent,
-	}
-}

pkg/kubelet/stats/helper.go

@@ -20,10 +20,11 @@ import (
 	"fmt"
 	"time"
 
+	"k8s.io/klog"
+
 	cadvisorapiv1 "github.com/google/cadvisor/info/v1"
 	cadvisorapiv2 "github.com/google/cadvisor/info/v2"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/klog"
 	statsapi "k8s.io/kubernetes/pkg/kubelet/apis/stats/v1alpha1"
 	"k8s.io/kubernetes/pkg/kubelet/cadvisor"
 )
@@ -157,10 +158,6 @@ func cadvisorInfoToNetworkStats(name string, info *cadvisorapiv2.ContainerInfo)
 		return nil
 	}
 
-	if cstat.Network == nil {
-		return nil
-	}
-
 	iStats := statsapi.NetworkStats{
 		Time: metav1.NewTime(cstat.Timestamp),
 	}