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Calling hcsshim instead of docker api to get stats for windows to greatly reduce latency

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This commit is contained in:
marosset 2020-01-31 19:01:24 +00:00
parent e8f12692df
commit 999fdfaddf
2 changed files with 18 additions and 6 deletions
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1
pkg/kubelet/dockershim/BUILD
View File

@ -78,6 +78,7 @@ go_library(
"@io_bazel_rules_go//go/platform:windows": [
"//pkg/kubelet/apis:go_default_library",
"//pkg/kubelet/winstats:go_default_library",
"//vendor/github.com/Microsoft/hcsshim:go_default_library",
"//vendor/golang.org/x/sys/windows/registry:go_default_library",
],
"//conditions:default": [],

23
pkg/kubelet/dockershim/docker_stats_windows.go
View File

@ -22,7 +22,9 @@ import (
"context"
"time"
"github.com/Microsoft/hcsshim"
runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
"k8s.io/klog"
)
func (ds *dockerService) getContainerStats(containerID string) (*runtimeapi.ContainerStats, error) {
@ -31,7 +33,18 @@ func (ds *dockerService) getContainerStats(containerID string) (*runtimeapi.Cont
return nil, err
}
statsJSON, err := ds.client.GetContainerStats(containerID)
hcsshim_container, err := hcsshim.OpenContainer(containerID)
if err != nil {
return nil, err
}
defer func() {
closeErr := hcsshim_container.Close()
if closeErr != nil {
klog.Errorf("Error closing container '%s': %v", containerID, closeErr)
}
}()
stats, err := hcsshim_container.Statistics()
if err != nil {
return nil, err
}
@ -47,7 +60,6 @@ func (ds *dockerService) getContainerStats(containerID string) (*runtimeapi.Cont
}
status := statusResp.GetStatus()
dockerStats := statsJSON.Stats
timestamp := time.Now().UnixNano()
containerStats := &runtimeapi.ContainerStats{
Attributes: &runtimeapi.ContainerAttributes{
@ -58,13 +70,12 @@ func (ds *dockerService) getContainerStats(containerID string) (*runtimeapi.Cont
},
Cpu: &runtimeapi.CpuUsage{
Timestamp: timestamp,
// have to multiply cpu usage by 100 since docker stats units is in 100's of nano seconds for Windows
// see https://github.com/moby/moby/blob/v1.13.1/api/types/stats.go#L22
UsageCoreNanoSeconds: &runtimeapi.UInt64Value{Value: dockerStats.CPUStats.CPUUsage.TotalUsage * 100},
// have to multiply cpu usage by 100 since stats units is in 100's of nano seconds for Windows
UsageCoreNanoSeconds: &runtimeapi.UInt64Value{Value: stats.Processor.TotalRuntime100ns * 100},
},
Memory: &runtimeapi.MemoryUsage{
Timestamp: timestamp,
WorkingSetBytes: &runtimeapi.UInt64Value{Value: dockerStats.MemoryStats.PrivateWorkingSet},
WorkingSetBytes: &runtimeapi.UInt64Value{Value: stats.Memory.UsagePrivateWorkingSetBytes},
},
WritableLayer: &runtimeapi.FilesystemUsage{
Timestamp: timestamp,