|
| 1 | +package config |
| 2 | + |
| 3 | +import ( |
| 4 | + "errors" |
| 5 | + "fmt" |
| 6 | + "io" |
| 7 | + "strings" |
| 8 | + |
| 9 | + "github.com/evanphx/json-patch" |
| 10 | + "github.com/spf13/cobra" |
| 11 | + |
| 12 | + "k8s.io/kubernetes/pkg/api" |
| 13 | + "k8s.io/kubernetes/pkg/kubectl" |
| 14 | + cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util" |
| 15 | + "k8s.io/kubernetes/pkg/kubectl/resource" |
| 16 | + "k8s.io/kubernetes/pkg/runtime" |
| 17 | + "k8s.io/kubernetes/pkg/util/sets" |
| 18 | + "k8s.io/kubernetes/pkg/util/strategicpatch" |
| 19 | + "k8s.io/kubernetes/pkg/util/yaml" |
| 20 | + |
| 21 | + configapi "github.com/openshift/origin/pkg/cmd/server/api" |
| 22 | + configapiinstall "github.com/openshift/origin/pkg/cmd/server/api/install" |
| 23 | + "github.com/openshift/origin/pkg/cmd/util/clientcmd" |
| 24 | +) |
| 25 | + |
| 26 | +const PatchRecommendedName = "patch" |
| 27 | + |
| 28 | +var patchTypes = map[string]api.PatchType{"json": api.JSONPatchType, "merge": api.MergePatchType, "strategic": api.StrategicMergePatchType} |
| 29 | + |
| 30 | +// PatchOptions is the start of the data required to perform the operation. As new fields are added, add them here instead of |
| 31 | +// referencing the cmd.Flags() |
| 32 | +type PatchOptions struct { |
| 33 | + Filename string |
| 34 | + Patch string |
| 35 | + PatchType api.PatchType |
| 36 | + |
| 37 | + Builder *resource.Builder |
| 38 | + |
| 39 | + Out io.Writer |
| 40 | +} |
| 41 | + |
| 42 | +const ( |
| 43 | + patch_long = `Patch the master-config.yaml or node-config.yaml` |
| 44 | + patch_example = ` |
| 45 | +# Set the auditConfig.enabled value to true |
| 46 | +%[1]s openshift.local.config/master/master-config.yaml --patch='{"auditConfig": {"enabled": true}}'` |
| 47 | +) |
| 48 | + |
| 49 | +func NewCmdPatch(name, fullName string, f *clientcmd.Factory, out io.Writer) *cobra.Command { |
| 50 | + o := &PatchOptions{Out: out} |
| 51 | + |
| 52 | + cmd := &cobra.Command{ |
| 53 | + Use: name + " FILENAME -p PATCH", |
| 54 | + Short: "Update field(s) of a resource using a patch.", |
| 55 | + Long: patch_long, |
| 56 | + Example: patch_example, |
| 57 | + Run: func(cmd *cobra.Command, args []string) { |
| 58 | + cmdutil.CheckErr(o.Complete(f, cmd, args)) |
| 59 | + cmdutil.CheckErr(o.Validate()) |
| 60 | + cmdutil.CheckErr(o.RunPatch()) |
| 61 | + }, |
| 62 | + } |
| 63 | + cmd.Flags().StringVarP(&o.Patch, "patch", "p", "", "The patch to be applied to the resource JSON file.") |
| 64 | + cmd.MarkFlagRequired("patch") |
| 65 | + cmd.Flags().String("type", "strategic", fmt.Sprintf("The type of patch being provided; one of %v", sets.StringKeySet(patchTypes).List())) |
| 66 | + |
| 67 | + return cmd |
| 68 | +} |
| 69 | + |
| 70 | +func (o *PatchOptions) Complete(f *clientcmd.Factory, cmd *cobra.Command, args []string) error { |
| 71 | + if len(args) != 1 { |
| 72 | + return fmt.Errorf("exactly one FILENAME is allowed: %v", args) |
| 73 | + } |
| 74 | + o.Filename = args[0] |
| 75 | + |
| 76 | + patchTypeString := strings.ToLower(cmdutil.GetFlagString(cmd, "type")) |
| 77 | + ok := false |
| 78 | + o.PatchType, ok = patchTypes[patchTypeString] |
| 79 | + if !ok { |
| 80 | + return cmdutil.UsageError(cmd, fmt.Sprintf("--type must be one of %v, not %q", sets.StringKeySet(patchTypes).List(), patchTypeString)) |
| 81 | + } |
| 82 | + |
| 83 | + o.Builder = resource.NewBuilder(configapiinstall.NewRESTMapper(), configapi.Scheme, resource.DisabledClientForMapping{}, configapi.Codecs.LegacyCodec()) |
| 84 | + |
| 85 | + return nil |
| 86 | +} |
| 87 | + |
| 88 | +func (o *PatchOptions) Validate() error { |
| 89 | + if len(o.Patch) == 0 { |
| 90 | + return errors.New("must specify -p to patch") |
| 91 | + } |
| 92 | + if len(o.Filename) == 0 { |
| 93 | + return errors.New("filename is required") |
| 94 | + } |
| 95 | + |
| 96 | + return nil |
| 97 | +} |
| 98 | + |
| 99 | +func (o *PatchOptions) RunPatch() error { |
| 100 | + patchBytes, err := yaml.ToJSON([]byte(o.Patch)) |
| 101 | + if err != nil { |
| 102 | + return fmt.Errorf("unable to parse %q: %v", o.Patch, err) |
| 103 | + } |
| 104 | + |
| 105 | + r := o.Builder. |
| 106 | + FilenameParam(false, false, o.Filename). |
| 107 | + Flatten(). |
| 108 | + Do() |
| 109 | + err = r.Err() |
| 110 | + if err != nil { |
| 111 | + return err |
| 112 | + } |
| 113 | + |
| 114 | + infos, err := r.Infos() |
| 115 | + if err != nil { |
| 116 | + return err |
| 117 | + } |
| 118 | + if len(infos) > 1 { |
| 119 | + return fmt.Errorf("multiple resources provided") |
| 120 | + } |
| 121 | + info := infos[0] |
| 122 | + |
| 123 | + originalObjJS, err := runtime.Encode(configapi.Codecs.LegacyCodec(), info.VersionedObject.(runtime.Object)) |
| 124 | + if err != nil { |
| 125 | + return err |
| 126 | + } |
| 127 | + patchedObj, err := configapi.Scheme.DeepCopy(info.VersionedObject) |
| 128 | + if err != nil { |
| 129 | + return err |
| 130 | + } |
| 131 | + originalPatchedObjJS, err := getPatchedJS(o.PatchType, originalObjJS, patchBytes, patchedObj.(runtime.Object)) |
| 132 | + if err != nil { |
| 133 | + return err |
| 134 | + } |
| 135 | + |
| 136 | + rawExtension := &runtime.Unknown{ |
| 137 | + Raw: originalPatchedObjJS, |
| 138 | + } |
| 139 | + printer, _, err := kubectl.GetPrinter("yaml", "") |
| 140 | + if err != nil { |
| 141 | + return err |
| 142 | + } |
| 143 | + if err := printer.PrintObj(rawExtension, o.Out); err != nil { |
| 144 | + return err |
| 145 | + } |
| 146 | + |
| 147 | + return nil |
| 148 | +} |
| 149 | + |
| 150 | +func getPatchedJS(patchType api.PatchType, originalJS, patchJS []byte, obj runtime.Object) ([]byte, error) { |
| 151 | + switch patchType { |
| 152 | + case api.JSONPatchType: |
| 153 | + patchObj, err := jsonpatch.DecodePatch(patchJS) |
| 154 | + if err != nil { |
| 155 | + return nil, err |
| 156 | + } |
| 157 | + return patchObj.Apply(originalJS) |
| 158 | + |
| 159 | + case api.MergePatchType: |
| 160 | + return jsonpatch.MergePatch(originalJS, patchJS) |
| 161 | + |
| 162 | + case api.StrategicMergePatchType: |
| 163 | + return strategicpatch.StrategicMergePatchData(originalJS, patchJS, obj) |
| 164 | + |
| 165 | + default: |
| 166 | + // only here as a safety net - go-restful filters content-type |
| 167 | + return nil, fmt.Errorf("unknown Content-Type header for patch: %v", patchType) |
| 168 | + } |
| 169 | +} |
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