func ExamplePrintReplicationController() {
f, tf, codec := NewAPIFactory()
tf.Printer = qingctl.NewHumanReadablePrinter(false, false, []string{})
tf.Client = &client.FakeRESTClient{
Codec: codec,
Client: nil,
}
cmd := NewCmdRun(f, os.Stdout)
ctrl := &api.ReplicationController{
ObjectMeta: api.ObjectMeta{
Name: "foo",
Labels: map[string]string{"foo": "bar"},
},
Spec: api.ReplicationControllerSpec{
Replicas: 1,
Selector: map[string]string{"foo": "bar"},
Template: &api.PodTemplateSpec{
ObjectMeta: api.ObjectMeta{
Labels: map[string]string{"foo": "bar"},
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "foo",
Image: "someimage",
},
},
},
},
},
}
err := f.PrintObject(cmd, ctrl, os.Stdout)
if err != nil {
fmt.Printf("Unexpected error: %v", err)
}
// Output:
// CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
// foo foo someimage foo=bar 1
}
// NewCmdGet creates a command object for the generic "get" action, which
// retrieves one or more resources from a server.
func NewCmdGet(f *cmdutil.Factory, out io.Writer) *cobra.Command {
p := qingctl.NewHumanReadablePrinter(false, false, []string{})
validArgs := p.HandledResources()
cmd := &cobra.Command{
Use: "get [(-o|--output=)json|yaml|template|...] (RESOURCE [NAME] | RESOURCE/NAME ...)",
Short: "Display one or many resources",
Long: get_long,
Example: get_example,
Run: func(cmd *cobra.Command, args []string) {
err := RunGet(f, out, cmd, args)
cmdutil.CheckErr(err)
},
ValidArgs: validArgs,
}
cmdutil.AddPrinterFlags(cmd)
cmd.Flags().StringP("selector", "l", "", "Selector (label query) to filter on")
cmd.Flags().BoolP("watch", "w", false, "After listing/getting the requested object, watch for changes.")
cmd.Flags().Bool("watch-only", false, "Watch for changes to the requested object(s), without listing/getting first.")
cmd.Flags().Bool("all-namespaces", false, "If present, list the requested object(s) across all namespaces. Namespace in current context is ignored even if specified with --namespace.")
qingctl.AddLabelsToColumnsFlag(cmd, &util.StringList{}, "Accepts a comma separated list of labels that are going to be presented as columns. Names are case-sensitive. You can also use multiple flag statements like -L label1 -L label2...")
return cmd
}
// NewFactory creates a factory with the default QingYuan resources defined
// if optionalClientConfig is nil, then flags will be bound to a new clientcmd.ClientConfig.
// if optionalClientConfig is not nil, then this factory will make use of it.
func NewFactory(optionalClientConfig clientcmd.ClientConfig) *Factory {
mapper := qingctl.ShortcutExpander{latest.RESTMapper}
flags := pflag.NewFlagSet("", pflag.ContinueOnError)
flags.SetNormalizeFunc(util.WarnWordSepNormalizeFunc) // Warn for "_" flags
generators := map[string]qingctl.Generator{
"run/v1": qingctl.BasicReplicationController{},
"service/v1": qingctl.ServiceGenerator{},
}
clientConfig := optionalClientConfig
if optionalClientConfig == nil {
clientConfig = DefaultClientConfig(flags)
}
clients := NewClientCache(clientConfig)
return &Factory{
clients: clients,
flags: flags,
generators: generators,
Object: func() (meta.RESTMapper, runtime.ObjectTyper) {
cfg, err := clientConfig.ClientConfig()
CheckErr(err)
cmdApiVersion := cfg.Version
return qingctl.OutputVersionMapper{mapper, cmdApiVersion}, api.Scheme
},
Client: func() (*client.Client, error) {
return clients.ClientForVersion("")
},
ClientConfig: func() (*client.Config, error) {
return clients.ClientConfigForVersion("")
},
RESTClient: func(mapping *meta.RESTMapping) (resource.RESTClient, error) {
client, err := clients.ClientForVersion(mapping.APIVersion)
if err != nil {
return nil, err
}
return client.RESTClient, nil
},
Describer: func(mapping *meta.RESTMapping) (qingctl.Describer, error) {
client, err := clients.ClientForVersion(mapping.APIVersion)
if err != nil {
return nil, err
}
describer, ok := qingctl.DescriberFor(mapping.Kind, client)
if !ok {
return nil, fmt.Errorf("no description has been implemented for %q", mapping.Kind)
}
return describer, nil
},
Printer: func(mapping *meta.RESTMapping, noHeaders, withNamespace bool, columnLabels []string) (qingctl.ResourcePrinter, error) {
return qingctl.NewHumanReadablePrinter(noHeaders, withNamespace, columnLabels), nil
},
PodSelectorForObject: func(object runtime.Object) (string, error) {
// TODO: replace with a swagger schema based approach (identify pod selector via schema introspection)
switch t := object.(type) {
case *api.ReplicationController:
return qingctl.MakeLabels(t.Spec.Selector), nil
case *api.Pod:
if len(t.Labels) == 0 {
return "", fmt.Errorf("the pod has no labels and cannot be exposed")
}
return qingctl.MakeLabels(t.Labels), nil
case *api.Service:
if t.Spec.Selector == nil {
return "", fmt.Errorf("the service has no pod selector set")
}
return qingctl.MakeLabels(t.Spec.Selector), nil
default:
kind, err := meta.NewAccessor().Kind(object)
if err != nil {
return "", err
}
return "", fmt.Errorf("it is not possible to get a pod selector from %s", kind)
}
},
PortsForObject: func(object runtime.Object) ([]string, error) {
// TODO: replace with a swagger schema based approach (identify pod selector via schema introspection)
switch t := object.(type) {
case *api.ReplicationController:
return getPorts(t.Spec.Template.Spec), nil
case *api.Pod:
return getPorts(t.Spec), nil
default:
kind, err := meta.NewAccessor().Kind(object)
if err != nil {
return nil, err
}
return nil, fmt.Errorf("it is not possible to get ports from %s", kind)
}
},
LabelsForObject: func(object runtime.Object) (map[string]string, error) {
return meta.NewAccessor().Labels(object)
},
Scaler: func(mapping *meta.RESTMapping) (qingctl.Scaler, error) {
client, err := clients.ClientForVersion(mapping.APIVersion)
if err != nil {
return nil, err
}
return qingctl.ScalerFor(mapping.Kind, qingctl.NewScalerClient(client))
},
Reaper: func(mapping *meta.RESTMapping) (qingctl.Reaper, error) {
client, err := clients.ClientForVersion(mapping.APIVersion)
if err != nil {
return nil, err
}
return qingctl.ReaperFor(mapping.Kind, client)
},
Validator: func() (validation.Schema, error) {
if flags.Lookup("validate").Value.String() == "true" {
client, err := clients.ClientForVersion("")
if err != nil {
return nil, err
}
return &clientSwaggerSchema{client, api.Scheme}, nil
}
return validation.NullSchema{}, nil
},
DefaultNamespace: func() (string, error) {
return clientConfig.Namespace()
},
Generator: func(name string) (qingctl.Generator, bool) {
generator, ok := generators[name]
return generator, ok
},
}
}