forked from containerd/nerdctl
/
container_inspect.go
137 lines (120 loc) · 3.37 KB
/
container_inspect.go
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/*
Copyright (C) nerdctl authors.
Copyright (C) containerd 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 main
import (
"context"
"encoding/json"
"fmt"
"time"
"github.com/AkihiroSuda/nerdctl/pkg/containerinspector"
"github.com/AkihiroSuda/nerdctl/pkg/idutil/containerwalker"
"github.com/AkihiroSuda/nerdctl/pkg/inspecttypes/dockercompat"
"github.com/pkg/errors"
"github.com/urfave/cli/v2"
)
var containerInspectCommand = &cli.Command{
Name: "inspect",
Usage: "Display detailed information on one or more containers.",
ArgsUsage: "[flags] CONTAINER [CONTAINER, ...]",
Description: "Hint: set `--mode=native` for showing the full output",
Action: containerInspectAction,
BashComplete: containerInspectBashComplete,
Flags: []cli.Flag{
&cli.StringFlag{
Name: "mode",
Usage: "Inspect mode, \"dockercompat\" for Docker-compatible output, \"native\" for containerd-native output",
Value: "dockercompat",
},
},
}
func containerInspectAction(clicontext *cli.Context) error {
if clicontext.NArg() == 0 {
return errors.Errorf("requires at least 1 argument")
}
client, ctx, cancel, err := newClient(clicontext)
if err != nil {
return err
}
defer cancel()
f := &containerInspector{
mode: clicontext.String("mode"),
}
walker := &containerwalker.ContainerWalker{
Client: client,
OnFound: f.Handler,
}
var errs []error
for _, req := range clicontext.Args().Slice() {
n, err := walker.Walk(ctx, req)
if err != nil {
errs = append(errs, err)
} else if n == 0 {
errs = append(errs, errors.Errorf("no such object: %s", req))
}
}
b, err := json.MarshalIndent(f.entries, "", " ")
if err != nil {
return err
}
fmt.Fprintln(clicontext.App.Writer, string(b))
if len(errs) > 0 {
return errors.Errorf("%d errors: %+v", len(errs), errs)
}
return nil
}
type containerInspector struct {
mode string
entries []interface{}
}
func (x *containerInspector) Handler(ctx context.Context, found containerwalker.Found) error {
ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
n, err := containerinspector.Inspect(ctx, found.Container)
if err != nil {
return err
}
switch x.mode {
case "native":
x.entries = append(x.entries, n)
case "dockercompat":
d, err := dockercompat.ContainerFromNative(n)
if err != nil {
return err
}
x.entries = append(x.entries, d)
default:
return errors.Errorf("unknown mode %q", x.mode)
}
return nil
}
func containerInspectBashComplete(clicontext *cli.Context) {
coco := parseCompletionContext(clicontext)
if coco.boring {
defaultBashComplete(clicontext)
return
}
if coco.flagTakesValue {
w := clicontext.App.Writer
switch coco.flagName {
case "mode":
fmt.Fprintln(w, "dockercompat")
fmt.Fprintln(w, "native")
return
}
defaultBashComplete(clicontext)
return
}
// show container names
bashCompleteContainerNames(clicontext)
}