Golang config.ModifyConfig函数代码示例

func (o LogoutOptions) RunLogout() error {
	token := o.Config.BearerToken

	client, err := client.New(o.Config)
	if err != nil {
		return err
	}

	userInfo, err := whoAmI(client)
	if err != nil {
		return err
	}

	if err := client.OAuthAccessTokens().Delete(token); err != nil {
		return err
	}

	newConfig := *o.StartingKubeConfig

	for key, value := range newConfig.AuthInfos {
		if value.Token == token {
			value.Token = ""
			newConfig.AuthInfos[key] = value
			// don't break, its possible that more than one user stanza has the same token.
		}
	}

	if err := kcmdconfig.ModifyConfig(o.PathOptions, newConfig, true); err != nil {
		return err
	}

	fmt.Fprintf(o.Out, "Logged %q out on %q\n", userInfo.Name, o.Config.Host)

	return nil
}

// SetupContext creates a new cluster and context in ~/.kube using the provided API Server. If setCurrent is true, it is made the current context.
func SetupContext(clusterName, contextName, kubeAPIServer string, setCurrent bool) error {
	pathOpts := kubectlcfg.NewDefaultPathOptions()
	config, err := getConfig(pathOpts)
	if err != nil {
		return err
	}

	cluster, exists := config.Clusters[clusterName]
	if !exists {
		cluster = kubecfg.NewCluster()
	}

	// configure cluster
	cluster.Server = kubeAPIServer
	cluster.InsecureSkipTLSVerify = true
	config.Clusters[clusterName] = cluster

	context, exists := config.Contexts[contextName]
	if !exists {
		context = kubecfg.NewContext()
	}

	// configure context
	context.Cluster = clusterName
	config.Contexts[contextName] = context

	// set as current if requested
	if setCurrent {
		config.CurrentContext = contextName
	}

	return kubectlcfg.ModifyConfig(pathOpts, *config, true)
}

// SetCurrentContext changes the kubectl context to the given value
func SetCurrentContext(context string) error {
	pathOpts := kubectlcfg.NewDefaultPathOptions()
	config, err := getConfig(pathOpts)
	if err != nil {
		return err
	}

	config.CurrentContext = context
	return kubectlcfg.ModifyConfig(pathOpts, *config, true)
}

// Save all the information present in this helper to a config file. An explicit config
// file path can be provided, if not use the established conventions about config
// loading rules. Will create a new config file if one can't be found at all. Will only
// succeed if all required info is present.
func (o *LoginOptions) SaveConfig() (bool, error) {
	if len(o.Username) == 0 {
		return false, fmt.Errorf("Insufficient data to merge configuration.")
	}

	globalExistedBefore := true
	if _, err := os.Stat(o.PathOptions.GlobalFile); os.IsNotExist(err) {
		globalExistedBefore = false
	}

	newConfig, err := config.CreateConfig(o.Project, o.Config)
	if err != nil {
		return false, err
	}

	cwd, err := os.Getwd()
	if err != nil {
		return false, err
	}
	baseDir, err := cmdutil.MakeAbs(filepath.Dir(o.PathOptions.GetDefaultFilename()), cwd)
	if err != nil {
		return false, err
	}
	if err := config.RelativizeClientConfigPaths(newConfig, baseDir); err != nil {
		return false, err
	}

	configToWrite, err := config.MergeConfig(*o.StartingKubeConfig, *newConfig)
	if err != nil {
		return false, err
	}

	if err := kubecmdconfig.ModifyConfig(o.PathOptions, *configToWrite, true); err != nil {
		return false, err
	}

	created := false
	if _, err := os.Stat(o.PathOptions.GlobalFile); err == nil {
		created = created || !globalExistedBefore
	}

	return created, nil
}

//.........这里部分代码省略.........
				fmt.Fprintf(out, "Using project %q on server %q.\n", currentProject, clientCfg.Host)
			}

		} else {
			if o.DisplayShort {
				return fmt.Errorf("no project has been set")
			}
			fmt.Fprintf(out, "No project has been set. Pass a project name to make that the default.\n")
		}
		return nil
	}

	// We have an argument that can be either a context or project
	argument := o.ProjectName

	contextInUse := ""
	namespaceInUse := ""
	contextNameIsGenerated := false

	// Check if argument is an existing context, if so just set it as the context in use.
	// If not a context then we will try to handle it as a project.
	if context, contextExists := config.Contexts[argument]; !o.ProjectOnly && contextExists {
		contextInUse = argument
		namespaceInUse = context.Namespace

		config.CurrentContext = argument

	} else {
		if !o.SkipAccessValidation {
			_, err := o.Client.Projects().Get(argument)
			if err != nil {
				if isNotFound, isForbidden := kapierrors.IsNotFound(err), clientcmd.IsForbidden(err); isNotFound || isForbidden {
					var msg string
					if isForbidden {
						msg = fmt.Sprintf("You are not a member of project %q.", argument)
					} else {
						msg = fmt.Sprintf("A project named %q does not exist on %q.", argument, clientCfg.Host)
					}

					projects, err := getProjects(o.Client)
					if err == nil {
						switch len(projects) {
						case 0:
							msg += "\nYou are not a member of any projects. You can request a project to be created with the 'new-project' command."
						case 1:
							msg += fmt.Sprintf("\nYou have one project on this server: %s", api.DisplayNameAndNameForProject(&projects[0]))
						default:
							msg += "\nYour projects are:"
							for _, project := range projects {
								msg += fmt.Sprintf("\n* %s", api.DisplayNameAndNameForProject(&project))
							}
						}
					}

					if hasMultipleServers(config) {
						msg += "\nTo see projects on another server, pass '--server=<server>'."
					}
					return errors.New(msg)
				}
				return err
			}
		}
		projectName := argument

		kubeconfig, err := cliconfig.CreateConfig(projectName, o.ClientConfig)
		if err != nil {
			return err
		}

		merged, err := cliconfig.MergeConfig(config, *kubeconfig)
		if err != nil {
			return err
		}
		config = *merged

		namespaceInUse = projectName
		contextInUse = merged.CurrentContext
		contextNameIsGenerated = true
	}

	if err := kubecmdconfig.ModifyConfig(o.PathOptions, config, true); err != nil {
		return err
	}

	if o.DisplayShort {
		fmt.Fprintln(out, namespaceInUse)
		return nil
	}

	if contextInUse != namespaceInUse && !contextNameIsGenerated {
		if len(namespaceInUse) > 0 {
			fmt.Fprintf(out, "Now using project %q from context named %q on server %q.\n", namespaceInUse, contextInUse, clientCfg.Host)
		} else {
			fmt.Fprintf(out, "Now using context named %q on server %q.\n", contextInUse, clientCfg.Host)
		}
	} else {
		fmt.Fprintf(out, "Now using project %q on server %q.\n", namespaceInUse, clientCfg.Host)
	}
	return nil
}

//.........这里部分代码省略.........
		return nil
	}

	// We have an argument that can be either a context or project
	argument := o.ProjectName

	contextInUse := ""
	namespaceInUse := ""

	// Check if argument is an existing context, if so just set it as the context in use.
	// If not a context then we will try to handle it as a project.
	if context, contextExists := config.Contexts[argument]; !o.ProjectOnly && contextExists {
		contextInUse = argument
		namespaceInUse = context.Namespace

		config.CurrentContext = argument

	} else {
		if !o.SkipAccessValidation {
			_, err := o.Client.Projects().Get(argument)
			if err != nil {
				if isNotFound, isForbidden := kapierrors.IsNotFound(err), clientcmd.IsForbidden(err); isNotFound || isForbidden {
					var msg string
					if isForbidden {
						msg = fmt.Sprintf("You are not a member of project %q.", argument)
					} else {
						msg = fmt.Sprintf("A project named %q does not exist on %q.", argument, clientCfg.Host)
					}

					projects, err := getProjects(o.Client)
					if err == nil {
						switch len(projects) {
						case 0:
							msg += "\nYou are not a member of any projects. You can request a project to be created with the 'new-project' command."
						case 1:
							msg += fmt.Sprintf("\nYou have one project on this server: %s", api.DisplayNameAndNameForProject(&projects[0]))
						default:
							msg += "\nYour projects are:"
							for _, project := range projects {
								msg += fmt.Sprintf("\n* %s", api.DisplayNameAndNameForProject(&project))
							}
						}
					}

					if hasMultipleServers(config) {
						msg += "\nTo see projects on another server, pass '--server=<server>'."
					}
					return errors.New(msg)
				}
				return err
			}
		}
		projectName := argument

		kubeconfig, err := cliconfig.CreateConfig(projectName, o.ClientConfig)
		if err != nil {
			return err
		}

		merged, err := cliconfig.MergeConfig(config, *kubeconfig)
		if err != nil {
			return err
		}
		config = *merged

		namespaceInUse = projectName
		contextInUse = merged.CurrentContext
	}

	if err := kubecmdconfig.ModifyConfig(o.PathOptions, config, true); err != nil {
		return err
	}

	if o.DisplayShort {
		fmt.Fprintln(out, namespaceInUse)
		return nil
	}

	// calculate what name we'd generate for the context.  If the context has the same name, don't drop it into the output, because the user won't
	// recognize the name since they didn't choose it.
	defaultContextName := cliconfig.GetContextNickname(namespaceInUse, config.Contexts[contextInUse].Cluster, config.Contexts[contextInUse].AuthInfo)

	switch {
	// if there is no namespace, then the only information we can provide is the context and server
	case (len(namespaceInUse) == 0):
		fmt.Fprintf(out, "Now using context named %q on server %q.\n", contextInUse, clientCfg.Host)

	// if they specified a project name and got a generated context, then only show the information they care about.  They won't recognize
	// a context name they didn't choose
	case (argument == namespaceInUse) && (contextInUse == defaultContextName):
		fmt.Fprintf(out, "Now using project %q on server %q.\n", namespaceInUse, clientCfg.Host)

	// in all other cases, display all information
	default:
		fmt.Fprintf(out, "Now using project %q from context named %q on server %q.\n", namespaceInUse, contextInUse, clientCfg.Host)

	}

	return nil
}