network

Documentation

Overview

Package network holds the typed objects that define the schemas for configuring the knative networking layer.

Index

• Constants
• Variables
• func ErrorHandler(logger *zap.SugaredLogger) func(http.ResponseWriter, *http.Request, error)
• func GetClusterDomainName() string
• func GetServiceHostname(name, namespace string) string
• func IsKubeletProbe(r *http.Request) bool
• func NewAutoTransport(maxIdle, maxIdlePerHost int) http.RoundTripper
• func NewBackoffDialer(backoffConfig wait.Backoff) func(context.Context, string, string) (net.Conn, error)
• func NewH2CTransport() http.RoundTripper
• func NewProberTransport() http.RoundTripper
• func NewProxyAutoTLSTransport(maxIdle, maxIdlePerHost int, tlsContext DialTLSContextFunc) http.RoundTripper
• func NewProxyAutoTransport(maxIdle, maxIdlePerHost int) http.RoundTripper
• func NewServer(addr string, h http.Handler) *http.Server
• func NewTLSBackoffDialer(backoffConfig wait.Backoff) func(context.Context, string, string, *tls.Config) (net.Conn, error)
• type DialTLSContextFunc
• type RoundTripperFunc
  • func (rt RoundTripperFunc) RoundTrip(r *http.Request) (*http.Response, error)

Constants

const (
	// DefaultDrainTimeout is the time that Knative components on the data
	// path will wait before shutting down server, but after starting to fail
	// readiness probes to ensure network layer propagation and so that no requests
	// are routed to this pod.
	// Note that this was bumped from 30s due to intermittent issues where
	// the webhook would get a bad request from the API Server when running
	// under chaos.
	DefaultDrainTimeout = 45 * time.Second

	// UserAgentKey is the constant for header "User-Agent".
	UserAgentKey = "User-Agent"

	// ProbeHeaderName is the name of a header that can be added to
	// requests to probe the knative networking layer.  Requests
	// with this header will not be passed to the user container or
	// included in request metrics.
	ProbeHeaderName = "K-Network-Probe"

	// ProbeHeaderValue is the value of a header that can be added to
	// requests to probe the knative networking layer.  Requests
	// with `K-Network-Probe` this value will not be passed to the user
	// container or included in request metrics.
	ProbeHeaderValue = "probe"

	// HashHeaderName is the name of an internal header that Ingress controller
	// uses to find out which version of the networking config is deployed.
	HashHeaderName = "K-Network-Hash"

	// KubeProbeUAPrefix is the prefix for the User-Agent header.
	// Since K8s 1.8, prober requests have
	//   User-Agent = "kube-probe/{major-version}.{minor-version}".
	KubeProbeUAPrefix = "kube-probe/"

	// KubeletProbeHeaderName is the header name to augment the probes, because
	// Istio with mTLS rewrites probes, but their probes pass a different
	// user-agent.
	KubeletProbeHeaderName = "K-Kubelet-Probe"
)

Variables

var AutoTransport = NewAutoTransport(1000, 100)

AutoTransport uses h2c for HTTP2 requests and falls back to `http.DefaultTransport` for all others

var DialTLSWithBackOff = NewTLSBackoffDialer(backOffTemplate)

DialTLSWithBackOff is same with DialWithBackOff but takes tls config.

var DialWithBackOff = NewBackoffDialer(backOffTemplate)

DialWithBackOff executes `net.Dialer.DialContext()` with exponentially increasing dial timeouts. In addition it sleeps with random jitter between tries.

var ErrTimeoutDialing = errors.New("timed out dialing")

ErrTimeoutDialing when the timeout is reached after set amount of time.

Functions

func ErrorHandler

func ErrorHandler(logger *zap.SugaredLogger) func(http.ResponseWriter, *http.Request, error)

ErrorHandler sets up a handler suitable for use with the ErrorHandler field on httputil's reverse proxy.

Deprecated: Use handler.Error instead.

func GetClusterDomainName

func GetClusterDomainName() string

GetClusterDomainName returns cluster's domain name or an error Closes issue: https://github.com/knative/eventing/issues/714

func GetServiceHostname

func GetServiceHostname(name, namespace string) string

GetServiceHostname returns the fully qualified service hostname

func IsKubeletProbe

func IsKubeletProbe(r *http.Request) bool

IsKubeletProbe returns true if the request is a Kubernetes probe.

func NewAutoTransport

func NewAutoTransport(maxIdle, maxIdlePerHost int) http.RoundTripper

NewAutoTransport creates a RoundTripper that can use appropriate transport based on the request's HTTP version.

func NewBackoffDialer

func NewBackoffDialer(backoffConfig wait.Backoff) func(context.Context, string, string) (net.Conn, error)

NewBackoffDialer returns a dialer that executes `net.Dialer.DialContext()` with exponentially increasing dial timeouts. In addition it sleeps with random jitter between tries.

func NewH2CTransport

func NewH2CTransport() http.RoundTripper

NewH2CTransport constructs a new H2C transport. That transport will reroute all HTTPS traffic to HTTP. This is to explicitly allow h2c (http2 without TLS) transport. See https://github.com/golang/go/issues/14141 for more details.

func NewProberTransport

func NewProberTransport() http.RoundTripper

NewProberTransport creates a RoundTripper that is useful for probing, since it will not cache connections.

func NewProxyAutoTLSTransport

func NewProxyAutoTLSTransport(maxIdle, maxIdlePerHost int, tlsContext DialTLSContextFunc) http.RoundTripper

NewProxyAutoTLSTransport is same with NewProxyAutoTransport but it has DialTLSContextFunc to create HTTPS request.

func NewProxyAutoTransport

func NewProxyAutoTransport(maxIdle, maxIdlePerHost int) http.RoundTripper

NewProxyAutoTransport creates a RoundTripper suitable for use by a reverse proxy. The returned transport uses HTTP or H2C based on the request's HTTP version. The transport has DisableCompression set to true.

func NewServer

func NewServer(addr string, h http.Handler) *http.Server

NewServer returns a new HTTP Server with HTTP2 handler.

func NewTLSBackoffDialer

func NewTLSBackoffDialer(backoffConfig wait.Backoff) func(context.Context, string, string, *tls.Config) (net.Conn, error)

NewTLSBackoffDialer is same with NewBackoffDialer but takes tls config.

Types

type DialTLSContextFunc

type DialTLSContextFunc func(ctx context.Context, network, addr string) (net.Conn, error)

type RoundTripperFunc

type RoundTripperFunc func(*http.Request) (*http.Response, error)

RoundTripperFunc implementation roundtrips a request.

func (RoundTripperFunc) RoundTrip

func (rt RoundTripperFunc) RoundTrip(r *http.Request) (*http.Response, error)

RoundTrip implements http.RoundTripper.