2019-01-12 04:58:27 +00:00
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/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package config
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import (
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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2020-08-10 17:43:49 +00:00
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"os"
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"path/filepath"
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"strings"
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"github.com/spf13/cobra"
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"k8s.io/client-go/tools/clientcmd"
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clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
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2019-04-07 17:07:55 +00:00
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cliflag "k8s.io/component-base/cli/flag"
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2019-09-27 21:51:53 +00:00
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cmdutil "k8s.io/kubectl/pkg/cmd/util"
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"k8s.io/kubectl/pkg/util/i18n"
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"k8s.io/kubectl/pkg/util/templates"
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)
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type createAuthInfoOptions struct {
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configAccess clientcmd.ConfigAccess
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name string
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clientCertificate cliflag.StringFlag
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clientKey cliflag.StringFlag
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token cliflag.StringFlag
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username cliflag.StringFlag
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password cliflag.StringFlag
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embedCertData cliflag.Tristate
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authProvider cliflag.StringFlag
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authProviderArgs map[string]string
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authProviderArgsToRemove []string
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execCommand cliflag.StringFlag
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execAPIVersion cliflag.StringFlag
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execArgs []string
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execEnv map[string]string
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execEnvToRemove []string
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}
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const (
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flagAuthProvider = "auth-provider"
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flagAuthProviderArg = "auth-provider-arg"
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flagExecCommand = "exec-command"
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flagExecAPIVersion = "exec-api-version"
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flagExecArg = "exec-arg"
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flagExecEnv = "exec-env"
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)
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var (
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createAuthInfoLong = fmt.Sprintf(templates.LongDesc(`
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Sets a user entry in kubeconfig
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Specifying a name that already exists will merge new fields on top of existing values.
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Client-certificate flags:
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--%v=certfile --%v=keyfile
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Bearer token flags:
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--%v=bearer_token
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Basic auth flags:
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--%v=basic_user --%v=basic_password
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Bearer token and basic auth are mutually exclusive.`), clientcmd.FlagCertFile, clientcmd.FlagKeyFile, clientcmd.FlagBearerToken, clientcmd.FlagUsername, clientcmd.FlagPassword)
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createAuthInfoExample = templates.Examples(`
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# Set only the "client-key" field on the "cluster-admin"
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# entry, without touching other values:
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kubectl config set-credentials cluster-admin --client-key=~/.kube/admin.key
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# Set basic auth for the "cluster-admin" entry
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kubectl config set-credentials cluster-admin --username=admin --password=uXFGweU9l35qcif
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# Embed client certificate data in the "cluster-admin" entry
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kubectl config set-credentials cluster-admin --client-certificate=~/.kube/admin.crt --embed-certs=true
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# Enable the Google Compute Platform auth provider for the "cluster-admin" entry
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kubectl config set-credentials cluster-admin --auth-provider=gcp
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# Enable the OpenID Connect auth provider for the "cluster-admin" entry with additional args
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kubectl config set-credentials cluster-admin --auth-provider=oidc --auth-provider-arg=client-id=foo --auth-provider-arg=client-secret=bar
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# Remove the "client-secret" config value for the OpenID Connect auth provider for the "cluster-admin" entry
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kubectl config set-credentials cluster-admin --auth-provider=oidc --auth-provider-arg=client-secret-
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# Enable new exec auth plugin for the "cluster-admin" entry
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kubectl config set-credentials cluster-admin --exec-command=/path/to/the/executable --exec-api-version=client.authentication.k8s.io/v1beta1
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# Define new exec auth plugin args for the "cluster-admin" entry
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kubectl config set-credentials cluster-admin --exec-arg=arg1 --exec-arg=arg2
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# Create or update exec auth plugin environment variables for the "cluster-admin" entry
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kubectl config set-credentials cluster-admin --exec-env=key1=val1 --exec-env=key2=val2
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# Remove exec auth plugin environment variables for the "cluster-admin" entry
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kubectl config set-credentials cluster-admin --exec-env=var-to-remove-`)
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)
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// NewCmdConfigSetAuthInfo returns an Command option instance for 'config set-credentials' sub command
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func NewCmdConfigSetAuthInfo(out io.Writer, configAccess clientcmd.ConfigAccess) *cobra.Command {
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options := &createAuthInfoOptions{configAccess: configAccess}
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return newCmdConfigSetAuthInfo(out, options)
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}
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func newCmdConfigSetAuthInfo(out io.Writer, options *createAuthInfoOptions) *cobra.Command {
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cmd := &cobra.Command{
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Use: fmt.Sprintf(
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"set-credentials NAME [--%v=path/to/certfile] "+
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"[--%v=path/to/keyfile] "+
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"[--%v=bearer_token] "+
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"[--%v=basic_user] "+
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"[--%v=basic_password] "+
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"[--%v=provider_name] "+
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"[--%v=key=value] "+
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"[--%v=exec_command] "+
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"[--%v=exec_api_version] "+
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"[--%v=arg] "+
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"[--%v=key=value]",
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clientcmd.FlagCertFile,
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clientcmd.FlagKeyFile,
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clientcmd.FlagBearerToken,
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clientcmd.FlagUsername,
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clientcmd.FlagPassword,
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flagAuthProvider,
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flagAuthProviderArg,
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flagExecCommand,
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flagExecAPIVersion,
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flagExecArg,
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flagExecEnv,
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),
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DisableFlagsInUseLine: true,
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Short: i18n.T("Sets a user entry in kubeconfig"),
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Long: createAuthInfoLong,
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Example: createAuthInfoExample,
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Run: func(cmd *cobra.Command, args []string) {
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err := options.complete(cmd, out)
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if err != nil {
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cmd.Help()
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cmdutil.CheckErr(err)
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}
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cmdutil.CheckErr(options.run())
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fmt.Fprintf(out, "User %q set.\n", options.name)
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},
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}
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cmd.Flags().Var(&options.clientCertificate, clientcmd.FlagCertFile, "Path to "+clientcmd.FlagCertFile+" file for the user entry in kubeconfig")
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cmd.MarkFlagFilename(clientcmd.FlagCertFile)
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cmd.Flags().Var(&options.clientKey, clientcmd.FlagKeyFile, "Path to "+clientcmd.FlagKeyFile+" file for the user entry in kubeconfig")
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cmd.MarkFlagFilename(clientcmd.FlagKeyFile)
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cmd.Flags().Var(&options.token, clientcmd.FlagBearerToken, clientcmd.FlagBearerToken+" for the user entry in kubeconfig")
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cmd.Flags().Var(&options.username, clientcmd.FlagUsername, clientcmd.FlagUsername+" for the user entry in kubeconfig")
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cmd.Flags().Var(&options.password, clientcmd.FlagPassword, clientcmd.FlagPassword+" for the user entry in kubeconfig")
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cmd.Flags().Var(&options.authProvider, flagAuthProvider, "Auth provider for the user entry in kubeconfig")
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cmd.Flags().StringSlice(flagAuthProviderArg, nil, "'key=value' arguments for the auth provider")
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cmd.Flags().Var(&options.execCommand, flagExecCommand, "Command for the exec credential plugin for the user entry in kubeconfig")
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cmd.Flags().Var(&options.execAPIVersion, flagExecAPIVersion, "API version of the exec credential plugin for the user entry in kubeconfig")
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cmd.Flags().StringSlice(flagExecArg, nil, "New arguments for the exec credential plugin command for the user entry in kubeconfig")
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cmd.Flags().StringArray(flagExecEnv, nil, "'key=value' environment values for the exec credential plugin")
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f := cmd.Flags().VarPF(&options.embedCertData, clientcmd.FlagEmbedCerts, "", "Embed client cert/key for the user entry in kubeconfig")
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f.NoOptDefVal = "true"
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return cmd
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}
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func (o createAuthInfoOptions) run() error {
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err := o.validate()
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if err != nil {
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return err
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}
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config, err := o.configAccess.GetStartingConfig()
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if err != nil {
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return err
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}
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startingStanza, exists := config.AuthInfos[o.name]
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if !exists {
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startingStanza = clientcmdapi.NewAuthInfo()
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}
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authInfo := o.modifyAuthInfo(*startingStanza)
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config.AuthInfos[o.name] = &authInfo
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if err := clientcmd.ModifyConfig(o.configAccess, *config, true); err != nil {
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return err
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}
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return nil
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}
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// authInfo builds an AuthInfo object from the options
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func (o *createAuthInfoOptions) modifyAuthInfo(existingAuthInfo clientcmdapi.AuthInfo) clientcmdapi.AuthInfo {
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modifiedAuthInfo := existingAuthInfo
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var setToken, setBasic bool
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if o.clientCertificate.Provided() {
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certPath := o.clientCertificate.Value()
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if o.embedCertData.Value() {
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modifiedAuthInfo.ClientCertificateData, _ = ioutil.ReadFile(certPath)
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modifiedAuthInfo.ClientCertificate = ""
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} else {
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certPath, _ = filepath.Abs(certPath)
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modifiedAuthInfo.ClientCertificate = certPath
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if len(modifiedAuthInfo.ClientCertificate) > 0 {
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modifiedAuthInfo.ClientCertificateData = nil
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}
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}
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}
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if o.clientKey.Provided() {
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keyPath := o.clientKey.Value()
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if o.embedCertData.Value() {
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modifiedAuthInfo.ClientKeyData, _ = ioutil.ReadFile(keyPath)
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modifiedAuthInfo.ClientKey = ""
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} else {
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keyPath, _ = filepath.Abs(keyPath)
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modifiedAuthInfo.ClientKey = keyPath
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if len(modifiedAuthInfo.ClientKey) > 0 {
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modifiedAuthInfo.ClientKeyData = nil
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}
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}
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}
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if o.token.Provided() {
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modifiedAuthInfo.Token = o.token.Value()
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setToken = len(modifiedAuthInfo.Token) > 0
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}
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if o.username.Provided() {
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modifiedAuthInfo.Username = o.username.Value()
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setBasic = setBasic || len(modifiedAuthInfo.Username) > 0
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}
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if o.password.Provided() {
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modifiedAuthInfo.Password = o.password.Value()
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setBasic = setBasic || len(modifiedAuthInfo.Password) > 0
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}
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if o.authProvider.Provided() {
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newName := o.authProvider.Value()
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// Only overwrite if the existing auth-provider is nil, or different than the newly specified one.
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if modifiedAuthInfo.AuthProvider == nil || modifiedAuthInfo.AuthProvider.Name != newName {
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modifiedAuthInfo.AuthProvider = &clientcmdapi.AuthProviderConfig{
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Name: newName,
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}
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}
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}
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if modifiedAuthInfo.AuthProvider != nil {
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if modifiedAuthInfo.AuthProvider.Config == nil {
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modifiedAuthInfo.AuthProvider.Config = make(map[string]string)
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}
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for _, toRemove := range o.authProviderArgsToRemove {
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delete(modifiedAuthInfo.AuthProvider.Config, toRemove)
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}
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for key, value := range o.authProviderArgs {
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modifiedAuthInfo.AuthProvider.Config[key] = value
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}
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}
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if o.execCommand.Provided() {
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newExecCommand := o.execCommand.Value()
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// create new Exec if doesn't exist, otherwise just modify the command
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if modifiedAuthInfo.Exec == nil {
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modifiedAuthInfo.Exec = &clientcmdapi.ExecConfig{
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Command: newExecCommand,
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}
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} else {
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modifiedAuthInfo.Exec.Command = newExecCommand
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// explicitly reset exec arguments
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modifiedAuthInfo.Exec.Args = nil
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}
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}
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// modify next values only if Exec exists, ignore these changes otherwise
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if modifiedAuthInfo.Exec != nil {
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if o.execAPIVersion.Provided() {
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modifiedAuthInfo.Exec.APIVersion = o.execAPIVersion.Value()
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}
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// rewrite exec arguments list with new values
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if o.execArgs != nil {
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modifiedAuthInfo.Exec.Args = o.execArgs
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}
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// iterate over the existing exec env values and remove the specified
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if o.execEnvToRemove != nil {
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newExecEnv := []clientcmdapi.ExecEnvVar{}
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for _, value := range modifiedAuthInfo.Exec.Env {
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needToRemove := false
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for _, elemToRemove := range o.execEnvToRemove {
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if value.Name == elemToRemove {
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needToRemove = true
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break
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}
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}
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if !needToRemove {
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newExecEnv = append(newExecEnv, value)
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}
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}
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modifiedAuthInfo.Exec.Env = newExecEnv
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}
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// update or create specified environment variables for the exec plugin
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if o.execEnv != nil {
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newEnv := []clientcmdapi.ExecEnvVar{}
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for newEnvName, newEnvValue := range o.execEnv {
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needToCreate := true
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for i := 0; i < len(modifiedAuthInfo.Exec.Env); i++ {
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if modifiedAuthInfo.Exec.Env[i].Name == newEnvName {
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// update the existing value
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needToCreate = false
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modifiedAuthInfo.Exec.Env[i].Value = newEnvValue
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break
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}
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}
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if needToCreate {
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// create a new env value
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newEnv = append(newEnv, clientcmdapi.ExecEnvVar{Name: newEnvName, Value: newEnvValue})
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|
|
}
|
|
|
|
}
|
|
|
|
modifiedAuthInfo.Exec.Env = append(modifiedAuthInfo.Exec.Env, newEnv...)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-01-12 04:58:27 +00:00
|
|
|
// If any auth info was set, make sure any other existing auth types are cleared
|
|
|
|
if setToken || setBasic {
|
|
|
|
if !setToken {
|
|
|
|
modifiedAuthInfo.Token = ""
|
|
|
|
}
|
|
|
|
if !setBasic {
|
|
|
|
modifiedAuthInfo.Username = ""
|
|
|
|
modifiedAuthInfo.Password = ""
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return modifiedAuthInfo
|
|
|
|
}
|
|
|
|
|
|
|
|
func (o *createAuthInfoOptions) complete(cmd *cobra.Command, out io.Writer) error {
|
|
|
|
args := cmd.Flags().Args()
|
|
|
|
if len(args) != 1 {
|
|
|
|
return fmt.Errorf("Unexpected args: %v", args)
|
|
|
|
}
|
|
|
|
|
|
|
|
authProviderArgs, err := cmd.Flags().GetStringSlice(flagAuthProviderArg)
|
|
|
|
if err != nil {
|
2019-04-07 17:07:55 +00:00
|
|
|
return fmt.Errorf("Error: %s", err)
|
2019-01-12 04:58:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if len(authProviderArgs) > 0 {
|
|
|
|
newPairs, removePairs, err := cmdutil.ParsePairs(authProviderArgs, flagAuthProviderArg, true)
|
|
|
|
if err != nil {
|
2019-04-07 17:07:55 +00:00
|
|
|
return fmt.Errorf("Error: %s", err)
|
2019-01-12 04:58:27 +00:00
|
|
|
}
|
|
|
|
o.authProviderArgs = newPairs
|
|
|
|
o.authProviderArgsToRemove = removePairs
|
|
|
|
}
|
|
|
|
|
2019-08-30 18:33:25 +00:00
|
|
|
execArgs, err := cmd.Flags().GetStringSlice(flagExecArg)
|
|
|
|
if err != nil {
|
|
|
|
return fmt.Errorf("Error: %s", err)
|
|
|
|
}
|
|
|
|
if len(execArgs) > 0 {
|
|
|
|
o.execArgs = execArgs
|
|
|
|
}
|
|
|
|
|
|
|
|
execEnv, err := cmd.Flags().GetStringArray(flagExecEnv)
|
|
|
|
if err != nil {
|
|
|
|
return fmt.Errorf("Error: %s", err)
|
|
|
|
}
|
|
|
|
if len(execEnv) > 0 {
|
|
|
|
newPairs, removePairs, err := cmdutil.ParsePairs(execEnv, flagExecEnv, true)
|
|
|
|
if err != nil {
|
|
|
|
return fmt.Errorf("Error: %s", err)
|
|
|
|
}
|
|
|
|
o.execEnv = newPairs
|
|
|
|
o.execEnvToRemove = removePairs
|
|
|
|
}
|
|
|
|
|
2019-01-12 04:58:27 +00:00
|
|
|
o.name = args[0]
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
func (o createAuthInfoOptions) validate() error {
|
|
|
|
if len(o.name) == 0 {
|
|
|
|
return errors.New("you must specify a non-empty user name")
|
|
|
|
}
|
|
|
|
methods := []string{}
|
|
|
|
if len(o.token.Value()) > 0 {
|
|
|
|
methods = append(methods, fmt.Sprintf("--%v", clientcmd.FlagBearerToken))
|
|
|
|
}
|
|
|
|
if len(o.username.Value()) > 0 || len(o.password.Value()) > 0 {
|
|
|
|
methods = append(methods, fmt.Sprintf("--%v/--%v", clientcmd.FlagUsername, clientcmd.FlagPassword))
|
|
|
|
}
|
|
|
|
if len(methods) > 1 {
|
|
|
|
return fmt.Errorf("you cannot specify more than one authentication method at the same time: %v", strings.Join(methods, ", "))
|
|
|
|
}
|
|
|
|
if o.embedCertData.Value() {
|
|
|
|
certPath := o.clientCertificate.Value()
|
|
|
|
keyPath := o.clientKey.Value()
|
|
|
|
if certPath == "" && keyPath == "" {
|
|
|
|
return fmt.Errorf("you must specify a --%s or --%s to embed", clientcmd.FlagCertFile, clientcmd.FlagKeyFile)
|
|
|
|
}
|
|
|
|
if certPath != "" {
|
2020-08-10 17:43:49 +00:00
|
|
|
if _, err := os.Stat(certPath); err != nil {
|
|
|
|
return fmt.Errorf("could not stat %s file %s: %v", clientcmd.FlagCertFile, certPath, err)
|
2019-01-12 04:58:27 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
if keyPath != "" {
|
2020-08-10 17:43:49 +00:00
|
|
|
if _, err := os.Stat(keyPath); err != nil {
|
|
|
|
return fmt.Errorf("could not stat %s file %s: %v", clientcmd.FlagKeyFile, keyPath, err)
|
2019-01-12 04:58:27 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return nil
|
|
|
|
}
|