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Add command "kubectl config get-contexts"
Note: Context is not a runtime object (doesn't have Kind and Version) so
we can't use the resource_printer- Loading branch information
Angus Salkeld
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Jul 5, 2016
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| This file is autogenerated, but we've stopped checking such files into the | ||
| repository to reduce the need for rebases. Please run hack/generate-docs.sh to | ||
| populate this file. |
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| <!-- BEGIN MUNGE: UNVERSIONED_WARNING --> | ||
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| <!-- BEGIN STRIP_FOR_RELEASE --> | ||
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| <img src="http://kubernetes.io/img/warning.png" alt="WARNING" | ||
| width="25" height="25"> | ||
| <img src="http://kubernetes.io/img/warning.png" alt="WARNING" | ||
| width="25" height="25"> | ||
| <img src="http://kubernetes.io/img/warning.png" alt="WARNING" | ||
| width="25" height="25"> | ||
| <img src="http://kubernetes.io/img/warning.png" alt="WARNING" | ||
| width="25" height="25"> | ||
| <img src="http://kubernetes.io/img/warning.png" alt="WARNING" | ||
| width="25" height="25"> | ||
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| <h2>PLEASE NOTE: This document applies to the HEAD of the source tree</h2> | ||
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| If you are using a released version of Kubernetes, you should | ||
| refer to the docs that go with that version. | ||
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| Documentation for other releases can be found at | ||
| [releases.k8s.io](http://releases.k8s.io). | ||
| </strong> | ||
| -- | ||
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| <!-- END STRIP_FOR_RELEASE --> | ||
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| <!-- END MUNGE: UNVERSIONED_WARNING --> | ||
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| This file is autogenerated, but we've stopped checking such files into the | ||
| repository to reduce the need for rebases. Please run hack/generate-docs.sh to | ||
| populate this file. | ||
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| <!-- BEGIN MUNGE: GENERATED_ANALYTICS --> | ||
| []() | ||
| <!-- END MUNGE: GENERATED_ANALYTICS --> |
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| /* | ||
| Copyright 2016 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
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| package config | ||
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| import ( | ||
| "fmt" | ||
| "io" | ||
| "strings" | ||
| "text/tabwriter" | ||
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| "github.com/spf13/cobra" | ||
| "k8s.io/kubernetes/pkg/client/unversioned/clientcmd" | ||
| clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api" | ||
| "k8s.io/kubernetes/pkg/kubectl" | ||
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| cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util" | ||
| utilerrors "k8s.io/kubernetes/pkg/util/errors" | ||
| "k8s.io/kubernetes/pkg/util/sets" | ||
| ) | ||
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| // GetContextsOptions contains the assignable options from the args. | ||
| type GetContextsOptions struct { | ||
| configAccess clientcmd.ConfigAccess | ||
| nameOnly bool | ||
| showHeaders bool | ||
| contextNames []string | ||
| out io.Writer | ||
| } | ||
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| const ( | ||
| getContextsLong = `Displays one or many contexts from the kubeconfig file.` | ||
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| getContextsExample = `# List all the contexts in your kubeconfig file | ||
| kubectl config get-contexts | ||
| # Describe one context in your kubeconfig file. | ||
| kubectl config get-contexts my-context` | ||
| ) | ||
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| // NewCmdConfigGetContexts creates a command object for the "get-contexts" action, which | ||
| // retrieves one or more contexts from a kubeconfig. | ||
| func NewCmdConfigGetContexts(out io.Writer, configAccess clientcmd.ConfigAccess) *cobra.Command { | ||
| options := &GetContextsOptions{configAccess: configAccess} | ||
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| cmd := &cobra.Command{ | ||
| Use: "get-contexts [(-o|--output=)name)]", | ||
| Short: "Describe one or many contexts", | ||
| Long: getContextsLong, | ||
| Example: getContextsExample, | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| validOutputTypes := sets.NewString("", "json", "yaml", "wide", "name", "go-template", "go-template-file", "jsonpath", "jsonpath-file") | ||
| supportedOutputTypes := sets.NewString("", "name") | ||
| outputFormat := cmdutil.GetFlagString(cmd, "output") | ||
| if !validOutputTypes.Has(outputFormat) { | ||
| cmdutil.CheckErr(fmt.Errorf("output must be one of '' or 'name': %v", outputFormat)) | ||
| } | ||
| if !supportedOutputTypes.Has(outputFormat) { | ||
| fmt.Fprintf(out, "--output %v is not available in kubectl config get-contexts; reseting to default output format", outputFormat) | ||
| cmd.Flags().Set("output", "") | ||
| } | ||
| cmdutil.CheckErr(options.Complete(cmd, args, out)) | ||
| cmdutil.CheckErr(options.RunGetContexts()) | ||
| }, | ||
| } | ||
| cmdutil.AddOutputFlags(cmd) | ||
| cmdutil.AddNoHeadersFlags(cmd) | ||
| return cmd | ||
| } | ||
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| // Complete assigns GetContextsOptions from the args. | ||
| func (o *GetContextsOptions) Complete(cmd *cobra.Command, args []string, out io.Writer) error { | ||
| o.contextNames = args | ||
| o.out = out | ||
| o.nameOnly = false | ||
| if cmdutil.GetFlagString(cmd, "output") == "name" { | ||
| o.nameOnly = true | ||
| } | ||
| o.showHeaders = true | ||
| if cmdutil.GetFlagBool(cmd, "no-headers") || o.nameOnly { | ||
| o.showHeaders = false | ||
| } | ||
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| return nil | ||
| } | ||
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| // RunGetContexts implements all the necessary functionality for context retrieval. | ||
| func (o GetContextsOptions) RunGetContexts() error { | ||
| config, err := o.configAccess.GetStartingConfig() | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| out, found := o.out.(*tabwriter.Writer) | ||
| if !found { | ||
| out = kubectl.GetNewTabWriter(o.out) | ||
| defer out.Flush() | ||
| } | ||
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| // Build a list of context names to print, and warn if any requested contexts are not found. | ||
| // Do this before printing the headers so it doesn't look ugly. | ||
| allErrs := []error{} | ||
| toPrint := []string{} | ||
| if len(o.contextNames) == 0 { | ||
| for name := range config.Contexts { | ||
| toPrint = append(toPrint, name) | ||
| } | ||
| } else { | ||
| for _, name := range o.contextNames { | ||
| _, ok := config.Contexts[name] | ||
| if ok { | ||
| toPrint = append(toPrint, name) | ||
| } else { | ||
| allErrs = append(allErrs, fmt.Errorf("context %v not found", name)) | ||
| } | ||
| } | ||
| } | ||
| if o.showHeaders { | ||
| err = printContextHeaders(out, o.nameOnly) | ||
| if err != nil { | ||
| allErrs = append(allErrs, err) | ||
| } | ||
| } | ||
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| for _, name := range toPrint { | ||
| err = printContext(name, config.Contexts[name], out, o.nameOnly, config.CurrentContext == name) | ||
| if err != nil { | ||
| allErrs = append(allErrs, err) | ||
| } | ||
| } | ||
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| return utilerrors.NewAggregate(allErrs) | ||
| } | ||
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| func printContextHeaders(out io.Writer, nameOnly bool) error { | ||
| columnNames := []string{"CURRENT", "NAME", "CLUSTER", "AUTHINFO", "NAMESPACE"} | ||
| if nameOnly { | ||
| columnNames = columnNames[:1] | ||
| } | ||
| _, err := fmt.Fprintf(out, "%s\n", strings.Join(columnNames, "\t")) | ||
| return err | ||
| } | ||
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| func printContext(name string, context *clientcmdapi.Context, w io.Writer, nameOnly, current bool) error { | ||
| if nameOnly { | ||
| _, err := fmt.Fprintf(w, "%s\n", name) | ||
| return err | ||
| } | ||
| prefix := " " | ||
| if current { | ||
| prefix = "*" | ||
| } | ||
| _, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\n", prefix, name, context.Cluster, context.AuthInfo, context.Namespace) | ||
| return err | ||
| } |
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