github.com/containerd/nerdctl/v2@v2.0.0-beta.5.0.20240520001846-b5758f54fa28/pkg/cmd/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 network 18 19 import ( 20 "context" 21 "fmt" 22 23 "github.com/containerd/containerd" 24 "github.com/containerd/log" 25 "github.com/containerd/nerdctl/v2/pkg/api/types" 26 "github.com/containerd/nerdctl/v2/pkg/netutil" 27 "github.com/containerd/nerdctl/v2/pkg/strutil" 28 ) 29 30 func Prune(ctx context.Context, client *containerd.Client, options types.NetworkPruneOptions) error { 31 e, err := netutil.NewCNIEnv(options.GOptions.CNIPath, options.GOptions.CNINetConfPath) 32 if err != nil { 33 return err 34 } 35 36 usedNetworks, err := netutil.UsedNetworks(ctx, client) 37 if err != nil { 38 return err 39 } 40 41 networkConfigs, err := e.NetworkList() 42 if err != nil { 43 return err 44 } 45 46 var removedNetworks []string // nolint: prealloc 47 for _, net := range networkConfigs { 48 if strutil.InStringSlice(options.NetworkDriversToKeep, net.Name) { 49 continue 50 } 51 if net.NerdctlID == nil || net.File == "" { 52 continue 53 } 54 if _, ok := usedNetworks[net.Name]; ok { 55 continue 56 } 57 if err := e.RemoveNetwork(net); err != nil { 58 log.G(ctx).WithError(err).Errorf("failed to remove network %s", net.Name) 59 continue 60 } 61 removedNetworks = append(removedNetworks, net.Name) 62 } 63 64 if len(removedNetworks) > 0 { 65 fmt.Fprintln(options.Stdout, "Deleted Networks:") 66 for _, name := range removedNetworks { 67 fmt.Fprintln(options.Stdout, name) 68 } 69 fmt.Fprintln(options.Stdout, "") 70 } 71 return nil 72 }