k3s/vendor/github.com/kubernetes-sigs/cri-tools/cmd/crictl/stats.go

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/*
Copyright 2017 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 crictl
import (
"fmt"
"sort"
"time"
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"github.com/docker/go-units"
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"github.com/sirupsen/logrus"
"github.com/urfave/cli"
"golang.org/x/net/context"
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pb "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
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)
type statsOptions struct {
// all containers
all bool
// id of container
id string
// podID of container
podID string
// sample is the duration for sampling cpu usage.
sample time.Duration
// labels are selectors for the sandbox
labels map[string]string
// output format
output string
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// live watch
watch bool
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}
var statsCommand = cli.Command{
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Name: "stats",
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Usage: "List container(s) resource usage statistics",
SkipArgReorder: true,
UseShortOptionHandling: true,
Flags: []cli.Flag{
cli.BoolFlag{
Name: "all, a",
Usage: "Show all containers (default shows just running)",
},
cli.StringFlag{
Name: "id",
Value: "",
Usage: "Filter by container id",
},
cli.StringFlag{
Name: "pod, p",
Value: "",
Usage: "Filter by pod id",
},
cli.StringSliceFlag{
Name: "label",
Usage: "Filter by key=value label",
},
cli.StringFlag{
Name: "output, o",
Usage: "Output format, One of: json|yaml|table",
},
cli.IntFlag{
Name: "seconds, s",
Value: 1,
Usage: "Sample duration for CPU usage in seconds",
},
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cli.BoolFlag{
Name: "watch, w",
Usage: "Watch pod resources",
},
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},
Action: func(context *cli.Context) error {
var err error
if err = getRuntimeClient(context); err != nil {
return err
}
opts := statsOptions{
all: context.Bool("all"),
id: context.String("id"),
podID: context.String("pod"),
sample: time.Duration(context.Int("seconds")) * time.Second,
output: context.String("output"),
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watch: context.Bool("watch"),
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}
opts.labels, err = parseLabelStringSlice(context.StringSlice("label"))
if err != nil {
return err
}
if err = ContainerStats(runtimeClient, opts); err != nil {
return fmt.Errorf("get container stats failed: %v", err)
}
return nil
},
}
type containerStatsByID []*pb.ContainerStats
func (c containerStatsByID) Len() int { return len(c) }
func (c containerStatsByID) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
func (c containerStatsByID) Less(i, j int) bool {
return c[i].Attributes.Id < c[j].Attributes.Id
}
// ContainerStats sends a ListContainerStatsRequest to the server, and
// parses the returned ListContainerStatsResponse.
func ContainerStats(client pb.RuntimeServiceClient, opts statsOptions) error {
filter := &pb.ContainerStatsFilter{}
if opts.id != "" {
filter.Id = opts.id
}
if opts.podID != "" {
filter.PodSandboxId = opts.podID
}
if opts.labels != nil {
filter.LabelSelector = opts.labels
}
request := &pb.ListContainerStatsRequest{
Filter: filter,
}
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display := newTableDisplay(20, 1, 3, ' ', 0)
if !opts.watch {
if err := displayStats(client, request, display, opts); err != nil {
return err
}
} else {
for range time.Tick(500 * time.Millisecond) {
if err := displayStats(client, request, display, opts); err != nil {
return err
}
}
}
return nil
}
func getContainerStats(client pb.RuntimeServiceClient, request *pb.ListContainerStatsRequest) (*pb.ListContainerStatsResponse, error) {
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logrus.Debugf("ListContainerStatsRequest: %v", request)
r, err := client.ListContainerStats(context.Background(), request)
logrus.Debugf("ListContainerResponse: %v", r)
if err != nil {
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return nil, err
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}
sort.Sort(containerStatsByID(r.Stats))
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return r, nil
}
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func displayStats(client pb.RuntimeServiceClient, request *pb.ListContainerStatsRequest, display *display, opts statsOptions) error {
r, err := getContainerStats(client, request)
if err != nil {
return err
}
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switch opts.output {
case "json":
return outputProtobufObjAsJSON(r)
case "yaml":
return outputProtobufObjAsYAML(r)
}
oldStats := make(map[string]*pb.ContainerStats)
for _, s := range r.GetStats() {
oldStats[s.Attributes.Id] = s
}
time.Sleep(opts.sample)
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r, err = getContainerStats(client, request)
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if err != nil {
return err
}
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display.AddRow([]string{columnContainer, columnCPU, columnMemory, columnDisk, columnInodes})
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for _, s := range r.GetStats() {
id := getTruncatedID(s.Attributes.Id, "")
cpu := s.GetCpu().GetUsageCoreNanoSeconds().GetValue()
mem := s.GetMemory().GetWorkingSetBytes().GetValue()
disk := s.GetWritableLayer().GetUsedBytes().GetValue()
inodes := s.GetWritableLayer().GetInodesUsed().GetValue()
if !opts.all && cpu == 0 && mem == 0 {
// Skip non-running container
continue
}
old, ok := oldStats[s.Attributes.Id]
if !ok {
// Skip new container
continue
}
var cpuPerc float64
if cpu != 0 {
// Only generate cpuPerc for running container
duration := s.GetCpu().GetTimestamp() - old.GetCpu().GetTimestamp()
if duration == 0 {
return fmt.Errorf("cpu stat is not updated during sample")
}
cpuPerc = float64(cpu-old.GetCpu().GetUsageCoreNanoSeconds().GetValue()) / float64(duration) * 100
}
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display.AddRow([]string{id, fmt.Sprintf("%.2f", cpuPerc), units.HumanSize(float64(mem)),
units.HumanSize(float64(disk)), fmt.Sprintf("%d", inodes)})
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}
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display.ClearScreen()
display.Flush()
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return nil
}