DockerCLI/cli/command/context/update.go

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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
}