github.com/containerd/nerdctl/v2@v2.0.0-beta.5.0.20240520001846-b5758f54fa28/pkg/cmd/network/inspect.go (about)

     1  /*
     2     Copyright The containerd Authors.
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package network
    18  
    19  import (
    20  	"context"
    21  	"encoding/json"
    22  	"fmt"
    23  
    24  	"github.com/containerd/log"
    25  	"github.com/containerd/nerdctl/v2/pkg/api/types"
    26  	"github.com/containerd/nerdctl/v2/pkg/formatter"
    27  	"github.com/containerd/nerdctl/v2/pkg/idutil/netwalker"
    28  	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/dockercompat"
    29  	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/native"
    30  	"github.com/containerd/nerdctl/v2/pkg/netutil"
    31  )
    32  
    33  func Inspect(ctx context.Context, options types.NetworkInspectOptions) error {
    34  	globalOptions := options.GOptions
    35  	e, err := netutil.NewCNIEnv(globalOptions.CNIPath, globalOptions.CNINetConfPath)
    36  
    37  	if err != nil {
    38  		return err
    39  	}
    40  	if options.Mode != "native" && options.Mode != "dockercompat" {
    41  		return fmt.Errorf("unknown mode %q", options.Mode)
    42  	}
    43  
    44  	var result []interface{}
    45  	walker := netwalker.NetworkWalker{
    46  		Client: e,
    47  		OnFound: func(ctx context.Context, found netwalker.Found) error {
    48  			if found.MatchCount > 1 {
    49  				return fmt.Errorf("multiple IDs found with provided prefix: %s", found.Req)
    50  			}
    51  			r := &native.Network{
    52  				CNI:           json.RawMessage(found.Network.Bytes),
    53  				NerdctlID:     found.Network.NerdctlID,
    54  				NerdctlLabels: found.Network.NerdctlLabels,
    55  				File:          found.Network.File,
    56  			}
    57  			switch options.Mode {
    58  			case "native":
    59  				result = append(result, r)
    60  			case "dockercompat":
    61  				compat, err := dockercompat.NetworkFromNative(r)
    62  				if err != nil {
    63  					return err
    64  				}
    65  				result = append(result, compat)
    66  			}
    67  			return nil
    68  		},
    69  	}
    70  
    71  	// `network inspect` doesn't support pseudo network.
    72  	err = walker.WalkAll(ctx, options.Networks, true, false)
    73  	if len(result) > 0 {
    74  		if formatErr := formatter.FormatSlice(options.Format, options.Stdout, result); formatErr != nil {
    75  			log.G(ctx).Error(formatErr)
    76  		}
    77  	}
    78  	return err
    79  }