|
| 1 | +// +build linux |
| 2 | + |
| 3 | +/* |
| 4 | + Copyright The containerd Authors. |
| 5 | +
|
| 6 | + Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | + you may not use this file except in compliance with the License. |
| 8 | + You may obtain a copy of the License at |
| 9 | +
|
| 10 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | +
|
| 12 | + Unless required by applicable law or agreed to in writing, software |
| 13 | + distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | + See the License for the specific language governing permissions and |
| 16 | + limitations under the License. |
| 17 | +*/ |
| 18 | + |
| 19 | +package tasks |
| 20 | + |
| 21 | +import ( |
| 22 | + "encoding/json" |
| 23 | + "errors" |
| 24 | + "fmt" |
| 25 | + "os" |
| 26 | + "text/tabwriter" |
| 27 | + |
| 28 | + "github.com/containerd/cgroups" |
| 29 | + "github.com/containerd/containerd/cmd/ctr/commands" |
| 30 | + "github.com/containerd/typeurl" |
| 31 | + "github.com/urfave/cli" |
| 32 | +) |
| 33 | + |
| 34 | +func init() { |
| 35 | + // metricsCommand is only added on Linux as github.com/containerd/cgroups |
| 36 | + // does not compile on darwin or windows |
| 37 | + Command.Subcommands = append(Command.Subcommands, metricsCommand) |
| 38 | +} |
| 39 | + |
| 40 | +const ( |
| 41 | + formatFlag = "format" |
| 42 | + formatTable = "table" |
| 43 | + formatJSON = "json" |
| 44 | +) |
| 45 | + |
| 46 | +var metricsCommand = cli.Command{ |
| 47 | + Name: "metrics", |
| 48 | + Usage: "get a single data point of metrics for a task with the built-in Linux runtime", |
| 49 | + ArgsUsage: "CONTAINER", |
| 50 | + Aliases: []string{"metric"}, |
| 51 | + Flags: []cli.Flag{ |
| 52 | + cli.StringFlag{ |
| 53 | + Name: formatFlag, |
| 54 | + Usage: `"table" or "json"`, |
| 55 | + Value: formatTable, |
| 56 | + }, |
| 57 | + }, |
| 58 | + Action: func(context *cli.Context) error { |
| 59 | + client, ctx, cancel, err := commands.NewClient(context) |
| 60 | + if err != nil { |
| 61 | + return err |
| 62 | + } |
| 63 | + defer cancel() |
| 64 | + container, err := client.LoadContainer(ctx, context.Args().First()) |
| 65 | + if err != nil { |
| 66 | + return err |
| 67 | + } |
| 68 | + task, err := container.Task(ctx, nil) |
| 69 | + if err != nil { |
| 70 | + return err |
| 71 | + } |
| 72 | + metric, err := task.Metrics(ctx) |
| 73 | + if err != nil { |
| 74 | + return nil |
| 75 | + } |
| 76 | + anydata, err := typeurl.UnmarshalAny(metric.Data) |
| 77 | + if err != nil { |
| 78 | + return err |
| 79 | + } |
| 80 | + data, ok := anydata.(*cgroups.Metrics) |
| 81 | + if !ok { |
| 82 | + return errors.New("cannot convert metric data to cgroups.Metrics") |
| 83 | + } |
| 84 | + |
| 85 | + switch context.String(formatFlag) { |
| 86 | + case formatTable: |
| 87 | + w := tabwriter.NewWriter(os.Stdout, 1, 8, 4, ' ', 0) |
| 88 | + fmt.Fprintf(w, "ID\tTIMESTAMP\t\n") |
| 89 | + fmt.Fprintf(w, "%s\t%s\t\n\n", metric.ID, metric.Timestamp) |
| 90 | + |
| 91 | + fmt.Fprintf(w, "METRIC\tVALUE\t\n") |
| 92 | + fmt.Fprintf(w, "memory.usage_in_bytes\t%d\t\n", data.Memory.Usage.Usage) |
| 93 | + fmt.Fprintf(w, "memory.stat.cache\t%d\t\n", data.Memory.TotalCache) |
| 94 | + fmt.Fprintf(w, "cpuacct.usage\t%d\t\n", data.CPU.Usage.Total) |
| 95 | + fmt.Fprintf(w, "cpuacct.usage_percpu\t%v\t\n", data.CPU.Usage.PerCPU) |
| 96 | + return w.Flush() |
| 97 | + case formatJSON: |
| 98 | + marshaledJSON, err := json.MarshalIndent(data, "", " ") |
| 99 | + if err != nil { |
| 100 | + return err |
| 101 | + } |
| 102 | + fmt.Println(string(marshaledJSON)) |
| 103 | + return nil |
| 104 | + default: |
| 105 | + return errors.New("format must be table or json") |
| 106 | + } |
| 107 | + }, |
| 108 | +} |
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