github.com/containerd/nerdctl@v1.7.7/cmd/nerdctl/network_prune.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 main
    18  
    19  import (
    20  	"fmt"
    21  	"strings"
    22  
    23  	"github.com/containerd/nerdctl/pkg/api/types"
    24  	"github.com/containerd/nerdctl/pkg/clientutil"
    25  	"github.com/containerd/nerdctl/pkg/cmd/network"
    26  	"github.com/spf13/cobra"
    27  )
    28  
    29  var networkDriversToKeep = []string{"host", "none", DefaultNetworkDriver}
    30  
    31  func newNetworkPruneCommand() *cobra.Command {
    32  	networkPruneCommand := &cobra.Command{
    33  		Use:           "prune [flags]",
    34  		Short:         "Remove all unused networks",
    35  		Args:          cobra.NoArgs,
    36  		RunE:          networkPruneAction,
    37  		SilenceUsage:  true,
    38  		SilenceErrors: true,
    39  	}
    40  	networkPruneCommand.Flags().BoolP("force", "f", false, "Do not prompt for confirmation")
    41  	return networkPruneCommand
    42  }
    43  
    44  func networkPruneAction(cmd *cobra.Command, _ []string) error {
    45  	globalOptions, err := processRootCmdFlags(cmd)
    46  	if err != nil {
    47  		return err
    48  	}
    49  	force, err := cmd.Flags().GetBool("force")
    50  	if err != nil {
    51  		return err
    52  	}
    53  
    54  	if !force {
    55  		var confirm string
    56  		msg := "This will remove all custom networks not used by at least one container."
    57  		msg += "\nAre you sure you want to continue? [y/N] "
    58  
    59  		fmt.Fprintf(cmd.OutOrStdout(), "WARNING! %s", msg)
    60  		fmt.Fscanf(cmd.InOrStdin(), "%s", &confirm)
    61  
    62  		if strings.ToLower(confirm) != "y" {
    63  			return nil
    64  		}
    65  	}
    66  	options := types.NetworkPruneOptions{
    67  		GOptions:             globalOptions,
    68  		NetworkDriversToKeep: networkDriversToKeep,
    69  		Stdout:               cmd.OutOrStdout(),
    70  	}
    71  
    72  	client, ctx, cancel, err := clientutil.NewClient(cmd.Context(), options.GOptions.Namespace, options.GOptions.Address)
    73  	if err != nil {
    74  		return err
    75  	}
    76  	defer cancel()
    77  
    78  	return network.Prune(ctx, client, options)
    79  }