118 lines
3.0 KiB
Go
118 lines
3.0 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package cmd
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import (
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"context"
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"encoding/json"
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"fmt"
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"os"
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"text/tabwriter"
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"time"
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"flag"
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"github.com/google/subcommands"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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"gvisor.dev/gvisor/runsc/boot"
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"gvisor.dev/gvisor/runsc/container"
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)
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// List implements subcommands.Command for the "list" command for the "list" command.
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type List struct {
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quiet bool
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format string
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}
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// Name implements subcommands.command.name.
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func (*List) Name() string {
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return "list"
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}
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// Synopsis implements subcommands.Command.Synopsis.
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func (*List) Synopsis() string {
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return "list containers started by runsc with the given root"
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}
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// Usage implements subcommands.Command.Usage.
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func (*List) Usage() string {
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return `list [flags]`
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}
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// SetFlags implements subcommands.Command.SetFlags.
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func (l *List) SetFlags(f *flag.FlagSet) {
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f.BoolVar(&l.quiet, "quiet", false, "only list container ids")
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f.StringVar(&l.format, "format", "text", "output format: 'text' (default) or 'json'")
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}
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// Execute implements subcommands.Command.Execute.
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func (l *List) Execute(_ context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus {
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if f.NArg() != 0 {
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f.Usage()
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return subcommands.ExitUsageError
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}
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conf := args[0].(*boot.Config)
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ids, err := container.List(conf.RootDir)
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if err != nil {
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Fatalf("%v", err)
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}
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if l.quiet {
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for _, id := range ids {
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fmt.Println(id)
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}
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return subcommands.ExitSuccess
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}
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// Collect the containers.
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var containers []*container.Container
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for _, id := range ids {
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c, err := container.Load(conf.RootDir, id)
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if err != nil {
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Fatalf("loading container %q: %v", id, err)
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}
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containers = append(containers, c)
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}
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switch l.format {
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case "text":
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// Print a nice table.
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w := tabwriter.NewWriter(os.Stdout, 12, 1, 3, ' ', 0)
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fmt.Fprint(w, "ID\tPID\tSTATUS\tBUNDLE\tCREATED\tOWNER\n")
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for _, c := range containers {
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fmt.Fprintf(w, "%s\t%d\t%s\t%s\t%s\t%s\n",
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c.ID,
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c.SandboxPid(),
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c.Status,
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c.BundleDir,
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c.CreatedAt.Format(time.RFC3339Nano),
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c.Owner)
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}
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w.Flush()
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case "json":
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// Print just the states.
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var states []specs.State
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for _, c := range containers {
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states = append(states, c.State())
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}
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if err := json.NewEncoder(os.Stdout).Encode(states); err != nil {
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Fatalf("marshaling container state: %v", err)
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}
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default:
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Fatalf("unknown list format %q", l.format)
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}
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return subcommands.ExitSuccess
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}
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