github.com/containerd/nerdctl/v2@v2.0.0-beta.5.0.20240520001846-b5758f54fa28/pkg/cmd/network/create.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 "fmt" 21 "io" 22 23 "github.com/containerd/containerd/errdefs" 24 "github.com/containerd/nerdctl/v2/pkg/api/types" 25 "github.com/containerd/nerdctl/v2/pkg/netutil" 26 ) 27 28 func Create(options types.NetworkCreateOptions, stdout io.Writer) error { 29 if len(options.Subnets) == 0 { 30 if options.Gateway != "" || options.IPRange != "" { 31 return fmt.Errorf("cannot set gateway or ip-range without subnet, specify --subnet manually") 32 } 33 options.Subnets = []string{""} 34 } 35 36 e, err := netutil.NewCNIEnv(options.GOptions.CNIPath, options.GOptions.CNINetConfPath) 37 if err != nil { 38 return err 39 } 40 net, err := e.CreateNetwork(options) 41 if err != nil { 42 if errdefs.IsAlreadyExists(err) { 43 return fmt.Errorf("network with name %s already exists", options.Name) 44 } 45 return err 46 } 47 _, err = fmt.Fprintln(stdout, *net.NerdctlID) 48 return err 49 }