healthcheck

package
v1.7.7 Latest Latest
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Published: Sep 28, 2017 License: Apache-2.0 Imports: 14 Imported by: 0

Documentation

Overview

Package healthcheck provides tools for serving kube-proxy healthchecks.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type HTTPServer added in v1.6.2

type HTTPServer interface {
	// Server is designed so that http.Server satifies this interface,
	Serve(listener net.Listener) error
}

HTTPServer allows for testing of Server.

type HTTPServerFactory added in v1.6.2

type HTTPServerFactory interface {
	// New creates an instance of a type satisfying HTTPServer.  This is
	// designed to include http.Server.
	New(addr string, handler http.Handler) HTTPServer
}

HTTPServerFactory allows for testing of Server. If the HTTPServerFactory argument to NewServer() is nil, the real http.Server type will be used.

type HealthzServer added in v1.7.0

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

HealthzServer returns 200 "OK" by default. Once timestamp has been updated, it verifies we don't exceed max no respond duration since last update.

func NewDefaultHealthzServer added in v1.7.0

func NewDefaultHealthzServer(addr string, healthTimeout time.Duration) *HealthzServer

NewDefaultHealthzServer returns a default healthz http server.

func (*HealthzServer) Run added in v1.7.0

func (hs *HealthzServer) Run()

Run starts the healthz http server and returns.

func (*HealthzServer) UpdateTimestamp added in v1.7.0

func (hs *HealthzServer) UpdateTimestamp()

UpdateTimestamp updates the lastUpdated timestamp.

type HealthzUpdater added in v1.7.0

type HealthzUpdater interface {
	UpdateTimestamp()
}

HealthzUpdater allows callers to update healthz timestamp only.

type Listener added in v1.6.2

type Listener interface {
	// Listen is very much like net.Listen, except the first arg (network) is
	// fixed to be "tcp".
	Listen(addr string) (net.Listener, error)
}

Listener allows for testing of Server. If the Listener argument to NewServer() is nil, the real net.Listen function will be used.

type Server added in v1.6.2

type Server interface {
	// Make the new set of services be active.  Services that were open before
	// will be closed.  Services that are new will be opened.  Service that
	// existed and are in the new set will be left alone.  The value of the map
	// is the healthcheck-port to listen on.
	SyncServices(newServices map[types.NamespacedName]uint16) error
	// Make the new set of endpoints be active.  Endpoints for services that do
	// not exist will be dropped.  The value of the map is the number of
	// endpoints the service has on this node.
	SyncEndpoints(newEndpoints map[types.NamespacedName]int) error
}

Server serves HTTP endpoints for each service name, with results based on the endpoints. If there are 0 endpoints for a service, it returns a 503 "Service Unavailable" error (telling LBs not to use this node). If there are 1 or more endpoints, it returns a 200 "OK".

func NewServer added in v1.6.2

func NewServer(hostname string, recorder record.EventRecorder, listener Listener, httpServerFactory HTTPServerFactory) Server

NewServer allocates a new healthcheck server manager. If either of the injected arguments are nil, defaults will be used.

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