package context import ( "bytes" "fmt" "text/tabwriter" "github.com/docker/cli/cli" "github.com/docker/cli/cli/command" "github.com/docker/cli/cli/context/docker" "github.com/docker/cli/cli/context/kubernetes" "github.com/docker/cli/cli/context/store" "github.com/pkg/errors" "github.com/spf13/cobra" ) // UpdateOptions are the options used to update a context type UpdateOptions struct { Name string Description string DefaultStackOrchestrator string Docker map[string]string Kubernetes map[string]string } func longUpdateDescription() string { buf := bytes.NewBuffer(nil) buf.WriteString("Update a context\n\nDocker endpoint config:\n\n") tw := tabwriter.NewWriter(buf, 20, 1, 3, ' ', 0) fmt.Fprintln(tw, "NAME\tDESCRIPTION") for _, d := range dockerConfigKeysDescriptions { fmt.Fprintf(tw, "%s\t%s\n", d.name, d.description) } tw.Flush() buf.WriteString("\nKubernetes endpoint config:\n\n") tw = tabwriter.NewWriter(buf, 20, 1, 3, ' ', 0) fmt.Fprintln(tw, "NAME\tDESCRIPTION") for _, d := range kubernetesConfigKeysDescriptions { fmt.Fprintf(tw, "%s\t%s\n", d.name, d.description) } tw.Flush() buf.WriteString("\nExample:\n\n$ docker context update my-context --description \"some description\" --docker \"host=tcp://myserver:2376,ca=~/ca-file,cert=~/cert-file,key=~/key-file\"\n") return buf.String() } func newUpdateCommand(dockerCli command.Cli) *cobra.Command { opts := &UpdateOptions{} cmd := &cobra.Command{ Use: "update [OPTIONS] CONTEXT", Short: "Update a context", Args: cli.ExactArgs(1), RunE: func(cmd *cobra.Command, args []string) error { opts.Name = args[0] return RunUpdate(dockerCli, opts) }, Long: longUpdateDescription(), } flags := cmd.Flags() flags.StringVar(&opts.Description, "description", "", "Description of the context") flags.StringVar( &opts.DefaultStackOrchestrator, "default-stack-orchestrator", "", "Default orchestrator for stack operations to use with this context (swarm|kubernetes|all)") flags.StringToStringVar(&opts.Docker, "docker", nil, "set the docker endpoint") flags.StringToStringVar(&opts.Kubernetes, "kubernetes", nil, "set the kubernetes endpoint") return cmd } // RunUpdate updates a Docker context func RunUpdate(cli command.Cli, o *UpdateOptions) error { if err := validateContextName(o.Name); err != nil { return err } s := cli.ContextStore() c, err := s.GetContextMetadata(o.Name) if err != nil { return err } dockerContext, err := command.GetDockerContext(c) if err != nil { return err } if o.DefaultStackOrchestrator != "" { stackOrchestrator, err := command.NormalizeOrchestrator(o.DefaultStackOrchestrator) if err != nil { return errors.Wrap(err, "unable to parse default-stack-orchestrator") } dockerContext.StackOrchestrator = stackOrchestrator } if o.Description != "" { dockerContext.Description = o.Description } c.Metadata = dockerContext tlsDataToReset := make(map[string]*store.EndpointTLSData) if o.Docker != nil { dockerEP, dockerTLS, err := getDockerEndpointMetadataAndTLS(cli, o.Docker) if err != nil { return errors.Wrap(err, "unable to create docker endpoint config") } c.Endpoints[docker.DockerEndpoint] = dockerEP tlsDataToReset[docker.DockerEndpoint] = dockerTLS } if o.Kubernetes != nil { kubernetesEP, kubernetesTLS, err := getKubernetesEndpointMetadataAndTLS(cli, o.Kubernetes) if err != nil { return errors.Wrap(err, "unable to create kubernetes endpoint config") } if kubernetesEP == nil { delete(c.Endpoints, kubernetes.KubernetesEndpoint) } else { c.Endpoints[kubernetes.KubernetesEndpoint] = kubernetesEP tlsDataToReset[kubernetes.KubernetesEndpoint] = kubernetesTLS } } if err := validateEndpointsAndOrchestrator(c); err != nil { return err } if err := s.CreateOrUpdateContext(c); err != nil { return err } for ep, tlsData := range tlsDataToReset { if err := s.ResetContextEndpointTLSMaterial(o.Name, ep, tlsData); err != nil { return err } } fmt.Fprintln(cli.Out(), o.Name) fmt.Fprintf(cli.Err(), "Successfully updated context %q\n", o.Name) return nil } func validateEndpointsAndOrchestrator(c store.ContextMetadata) error { dockerContext, err := command.GetDockerContext(c) if err != nil { return err } if _, ok := c.Endpoints[kubernetes.KubernetesEndpoint]; !ok && dockerContext.StackOrchestrator.HasKubernetes() { return errors.Errorf("cannot specify orchestrator %q without configuring a Kubernetes endpoint", dockerContext.StackOrchestrator) } return nil }