github.com/containerd/nerdctl/v2@v2.0.0-beta.5.0.20240520001846-b5758f54fa28/pkg/cmd/network/remove.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/nerdctl/v2/pkg/api/types" 25 "github.com/containerd/nerdctl/v2/pkg/idutil/netwalker" 26 "github.com/containerd/nerdctl/v2/pkg/netutil" 27 ) 28 29 func Remove(ctx context.Context, client *containerd.Client, options types.NetworkRemoveOptions) error { 30 e, err := netutil.NewCNIEnv(options.GOptions.CNIPath, options.GOptions.CNINetConfPath) 31 if err != nil { 32 return err 33 } 34 35 usedNetworkInfo, err := netutil.UsedNetworks(ctx, client) 36 if err != nil { 37 return err 38 } 39 40 walker := netwalker.NetworkWalker{ 41 Client: e, 42 OnFound: func(ctx context.Context, found netwalker.Found) error { 43 if found.MatchCount > 1 { 44 return fmt.Errorf("multiple IDs found with provided prefix: %s", found.Req) 45 } 46 if value, ok := usedNetworkInfo[found.Network.Name]; ok { 47 return fmt.Errorf("network %q is in use by container %q", found.Req, value) 48 } 49 if found.Network.NerdctlID == nil { 50 return fmt.Errorf("%s is managed outside nerdctl and cannot be removed", found.Req) 51 } 52 if found.Network.File == "" { 53 return fmt.Errorf("%s is a pre-defined network and cannot be removed", found.Req) 54 } 55 if err := e.RemoveNetwork(found.Network); err != nil { 56 return err 57 } 58 fmt.Fprintln(options.Stdout, found.Req) 59 return nil 60 }, 61 } 62 63 return walker.WalkAll(ctx, options.Networks, true, false) 64 }