remotecommand

Documentation

Overview

Package remotecommand adds support for executing commands in containers, with support for separate stdin, stdout, and stderr streams, as well as TTY.

Index

• type Executor
  • func NewFallbackExecutor(primary, secondary Executor, shouldFallback func(error) bool) (Executor, error)
  • func NewSPDYExecutor(config *restclient.Config, method string, url *url.URL) (Executor, error)
  • func NewSPDYExecutorForProtocols(transport http.RoundTripper, upgrader spdy.Upgrader, method string, ...) (Executor, error)
  • func NewSPDYExecutorForTransports(transport http.RoundTripper, upgrader spdy.Upgrader, method string, ...) (Executor, error)
  • func NewSPDYExecutorRejectRedirects(transport http.RoundTripper, upgrader spdy.Upgrader, method string, ...) (Executor, error)
  • func NewWebSocketExecutor(config *restclient.Config, method, url string) (Executor, error)
  • func NewWebSocketExecutorForProtocols(config *restclient.Config, method, url string, protocols ...string) (Executor, error)
• type FallbackExecutor
  • func (f *FallbackExecutor) Stream(options StreamOptions) error
  • func (f *FallbackExecutor) StreamWithContext(ctx context.Context, options StreamOptions) error
• type StreamOptions
• type TerminalSize
• type TerminalSizeQueue

Types

type Executor

type Executor interface {
	// Deprecated: use StreamWithContext instead to avoid possible resource leaks.
	// See https://github.com/kubernetes/kubernetes/pull/103177 for details.
	Stream(options StreamOptions) error

	// StreamWithContext initiates the transport of the standard shell streams. It will
	// transport any non-nil stream to a remote system, and return an error if a problem
	// occurs. If tty is set, the stderr stream is not used (raw TTY manages stdout and
	// stderr over the stdout stream).
	// The context controls the entire lifetime of stream execution.
	StreamWithContext(ctx context.Context, options StreamOptions) error
}

Executor is an interface for transporting shell-style streams.

func NewFallbackExecutor

func NewFallbackExecutor(primary, secondary Executor, shouldFallback func(error) bool) (Executor, error)

NewFallbackExecutor creates an Executor that first attempts to use the WebSocketExecutor, falling back to the legacy SPDYExecutor if the initial websocket "StreamWithContext" call fails. func NewFallbackExecutor(config *restclient.Config, method string, url *url.URL) (Executor, error) {

func NewSPDYExecutor

func NewSPDYExecutor(config *restclient.Config, method string, url *url.URL) (Executor, error)

NewSPDYExecutor connects to the provided server and upgrades the connection to multiplexed bidirectional streams.

func NewSPDYExecutorForProtocols

func NewSPDYExecutorForProtocols(transport http.RoundTripper, upgrader spdy.Upgrader, method string, url *url.URL, protocols ...string) (Executor, error)

NewSPDYExecutorForProtocols connects to the provided server and upgrades the connection to multiplexed bidirectional streams using only the provided protocols. Exposed for testing, most callers should use NewSPDYExecutor or NewSPDYExecutorForTransports.

func NewSPDYExecutorForTransports

func NewSPDYExecutorForTransports(transport http.RoundTripper, upgrader spdy.Upgrader, method string, url *url.URL) (Executor, error)

NewSPDYExecutorForTransports connects to the provided server using the given transport, upgrades the response using the given upgrader to multiplexed bidirectional streams.

func NewSPDYExecutorRejectRedirects

func NewSPDYExecutorRejectRedirects(transport http.RoundTripper, upgrader spdy.Upgrader, method string, url *url.URL) (Executor, error)

NewSPDYExecutorRejectRedirects returns an Executor that will upgrade the future connection to a SPDY bi-directional streaming connection when calling "Stream" (deprecated) or "StreamWithContext" (preferred). Additionally, if the upstream server returns a redirect during the attempted upgrade in these "Stream" calls, an error is returned.

func NewWebSocketExecutor

func NewWebSocketExecutor(config *restclient.Config, method, url string) (Executor, error)

func NewWebSocketExecutorForProtocols

func NewWebSocketExecutorForProtocols(config *restclient.Config, method, url string, protocols ...string) (Executor, error)

NewWebSocketExecutorForProtocols allows to execute commands via a WebSocket connection.

type FallbackExecutor

type FallbackExecutor struct {
	// contains filtered or unexported fields
}

func (*FallbackExecutor) Stream

func (f *FallbackExecutor) Stream(options StreamOptions) error

Stream is deprecated. Please use "StreamWithContext".

func (*FallbackExecutor) StreamWithContext

func (f *FallbackExecutor) StreamWithContext(ctx context.Context, options StreamOptions) error

StreamWithContext initially attempts to call "StreamWithContext" using the primary executor, falling back to calling the secondary executor if the initial primary call to upgrade to a websocket connection fails.

type StreamOptions

type StreamOptions struct {
	Stdin             io.Reader
	Stdout            io.Writer
	Stderr            io.Writer
	Tty               bool
	TerminalSizeQueue TerminalSizeQueue
}

StreamOptions holds information pertaining to the current streaming session: input/output streams, if the client is requesting a TTY, and a terminal size queue to support terminal resizing.

type TerminalSize

type TerminalSize struct {
	Width  uint16
	Height uint16
}

TerminalSize represents the width and height of a terminal.

type TerminalSizeQueue

type TerminalSizeQueue interface {
	// Next returns the new terminal size after the terminal has been resized. It returns nil when
	// monitoring has been stopped.
	Next() *TerminalSize
}

TerminalSizeQueue is capable of returning terminal resize events as they occur.