master

Documentation

Overview

Package master contains code for setting up and running a Kubernetes cluster master.

Index

• Constants
• func NewEtcdHelper(client tools.EtcdGetSet, version string, prefix string) (helper tools.EtcdHelper, err error)
• func NewHandlerContainer(mux *http.ServeMux) *restful.Container
• type Config
• type Controller
  • func (c *Controller) CreateMasterServiceIfNeeded(serviceName string, serviceIP net.IP, servicePort int) error
  • func (c *Controller) CreateNamespaceIfNeeded(ns string) error
  • func (c *Controller) RunKubernetesROService(ch chan struct{})
  • func (c *Controller) RunKubernetesService(ch chan struct{})
  • func (c *Controller) SetEndpoints(serviceName string, ip net.IP, port int) error
  • func (c *Controller) Start()
  • func (c *Controller) UpdateKubernetesROService() error
  • func (c *Controller) UpdateKubernetesService() error
• type Master
  • func New(c *Config) *Master
  • func (m *Master) HandleFuncWithAuth(pattern string, handler func(http.ResponseWriter, *http.Request))
  • func (m *Master) HandleWithAuth(pattern string, handler http.Handler)
  • func (m *Master) InstallSwaggerAPI()
  • func (m *Master) NewBootstrapController() *Controller

Constants

const (
	DefaultEtcdPathPrefix = "/registry"
)

Functions

func NewEtcdHelper

func NewEtcdHelper(client tools.EtcdGetSet, version string, prefix string) (helper tools.EtcdHelper, err error)

NewEtcdHelper returns an EtcdHelper for the provided arguments or an error if the version is incorrect.

func NewHandlerContainer

func NewHandlerContainer(mux *http.ServeMux) *restful.Container

Types

type Config

type Config struct {
	EtcdHelper    tools.EtcdHelper
	EventTTL      time.Duration
	MinionRegexp  string
	KubeletClient client.KubeletClient
	// allow downstream consumers to disable the core controller loops
	EnableCoreControllers bool
	EnableLogsSupport     bool
	EnableUISupport       bool
	// allow downstream consumers to disable swagger
	EnableSwaggerSupport bool
	// allow v1beta1 to be conditionally disabled
	DisableV1Beta1 bool
	// allow v1beta2 to be conditionally disabled
	DisableV1Beta2 bool
	// allow v1beta3 to be conditionally disabled
	DisableV1Beta3 bool
	// allow v1 to be conditionally enabled
	EnableV1 bool
	// allow downstream consumers to disable the index route
	EnableIndex           bool
	EnableProfiling       bool
	APIPrefix             string
	CorsAllowedOriginList util.StringList
	Authenticator         authenticator.Request
	// TODO(roberthbailey): Remove once the server no longer supports http basic auth.
	SupportsBasicAuth      bool
	Authorizer             authorizer.Authorizer
	AdmissionControl       admission.Interface
	MasterServiceNamespace string

	// Map requests to contexts. Exported so downstream consumers can provider their own mappers
	RequestContextMapper api.RequestContextMapper

	// If specified, all web services will be registered into this container
	RestfulContainer *restful.Container

	// Number of masters running; all masters must be started with the
	// same value for this field. (Numbers > 1 currently untested.)
	MasterCount int

	// The port on PublicAddress where a read-only server will be installed.
	// Defaults to 7080 if not set.
	ReadOnlyPort int
	// The port on PublicAddress where a read-write server will be installed.
	// Defaults to 6443 if not set.
	ReadWritePort int

	// ExternalHost is the host name to use for external (public internet) facing URLs (e.g. Swagger)
	ExternalHost string

	// If nil, the first result from net.InterfaceAddrs will be used.
	PublicAddress net.IP

	// Control the interval that pod, node IP, and node heath status caches
	// expire.
	CacheTimeout time.Duration

	// The name of the cluster.
	ClusterName string

	// The range of IPs to be assigned to services with type=ClusterIP or greater
	ServiceClusterIPRange *net.IPNet

	// The range of ports to be assigned to services with type=NodePort or greater
	ServiceNodePortRange util.PortRange
}

Config is a structure used to configure a Master.

type Controller

type Controller struct {
	NamespaceRegistry namespace.Registry
	ServiceRegistry   service.Registry
	// TODO: MasterCount is yucky
	MasterCount int

	ServiceClusterIPRegistry service.RangeRegistry
	ServiceClusterIPInterval time.Duration
	ServiceClusterIPRange    *net.IPNet

	ServiceNodePortRegistry service.RangeRegistry
	ServiceNodePortInterval time.Duration
	ServiceNodePortRange    util.PortRange

	EndpointRegistry endpoint.Registry
	EndpointInterval time.Duration

	PublicIP net.IP

	ServiceIP         net.IP
	ServicePort       int
	PublicServicePort int

	ReadOnlyServiceIP         net.IP
	ReadOnlyServicePort       int
	PublicReadOnlyServicePort int
	// contains filtered or unexported fields
}

Controller is the controller manager for the core bootstrap Kubernetes controller loops, which manage creating the "kubernetes" and "kubernetes-ro" services, the "default" namespace, and provide the IP repair check on service IPs

func (*Controller) CreateMasterServiceIfNeeded

func (c *Controller) CreateMasterServiceIfNeeded(serviceName string, serviceIP net.IP, servicePort int) error

CreateMasterServiceIfNeeded will create the specified service if it doesn't already exist.

func (*Controller) CreateNamespaceIfNeeded

func (c *Controller) CreateNamespaceIfNeeded(ns string) error

CreateNamespaceIfNeeded will create the namespace that contains the master services if it doesn't already exist

func (*Controller) RunKubernetesROService

func (c *Controller) RunKubernetesROService(ch chan struct{})

RunKubernetesROService periodically updates the kubernetes RO service

func (*Controller) RunKubernetesService

func (c *Controller) RunKubernetesService(ch chan struct{})

RunKubernetesService periodically updates the kubernetes service

func (*Controller) SetEndpoints

func (c *Controller) SetEndpoints(serviceName string, ip net.IP, port int) error

SetEndpoints sets the endpoints for the given apiserver service (ro or rw). SetEndpoints expects that the endpoints objects it manages will all be managed only by SetEndpoints; therefore, to understand this, you need only understand the requirements and the body of this function.

Requirements:

• All apiservers MUST use the same ports for their {rw, ro} services.
• All apiservers MUST use SetEndpoints and only SetEndpoints to manage the endpoints for their {rw, ro} services.
• All apiservers MUST know and agree on the number of apiservers expected to be running (c.masterCount).
• SetEndpoints is called periodically from all apiservers.

func (*Controller) Start

func (c *Controller) Start()

Start begins the core controller loops that must exist for bootstrapping a cluster.

func (*Controller) UpdateKubernetesROService

func (c *Controller) UpdateKubernetesROService() error

UpdateKubernetesROService attempts to update the default Kube read-only service.

func (*Controller) UpdateKubernetesService

func (c *Controller) UpdateKubernetesService() error

UpdateKubernetesService attempts to update the default Kube service.

type Master

type Master struct {

	// "Outputs"
	Handler         http.Handler
	InsecureHandler http.Handler
	// contains filtered or unexported fields
}

Master contains state for a Kubernetes cluster master/api server.

func New

func New(c *Config) *Master

New returns a new instance of Master from the given config. Certain config fields will be set to a default value if unset, including:

ServiceClusterIPRange
ServiceNodePortRange
MasterCount
ReadOnlyPort
ReadWritePort
PublicAddress

Certain config fields must be specified, including:

KubeletClient

Public fields:

Handler -- The returned master has a field TopHandler which is an
http.Handler which handles all the endpoints provided by the master,
including the API, the UI, and miscelaneous debugging endpoints.  All
these are subject to authorization and authentication.
InsecureHandler -- an http.Handler which handles all the same
endpoints as Handler, but no authorization and authentication is done.

Public methods:

HandleWithAuth -- Allows caller to add an http.Handler for an endpoint
that uses the same authentication and authorization (if any is configured)
as the master's built-in endpoints.
If the caller wants to add additional endpoints not using the master's
auth, then the caller should create a handler for those endpoints, which delegates the
any unhandled paths to "Handler".

func (*Master) HandleFuncWithAuth

func (m *Master) HandleFuncWithAuth(pattern string, handler func(http.ResponseWriter, *http.Request))

HandleFuncWithAuth adds an http.Handler for pattern to an http.ServeMux Applies the same authentication and authorization (if any is configured) to the request is used for the master's built-in endpoints.

func (*Master) HandleWithAuth

func (m *Master) HandleWithAuth(pattern string, handler http.Handler)

HandleWithAuth adds an http.Handler for pattern to an http.ServeMux Applies the same authentication and authorization (if any is configured) to the request is used for the master's built-in endpoints.

func (*Master) InstallSwaggerAPI

func (m *Master) InstallSwaggerAPI()

InstallSwaggerAPI installs the /swaggerapi/ endpoint to allow schema discovery and traversal. It is optional to allow consumers of the Kubernetes master to register their own web services into the Kubernetes mux prior to initialization of swagger, so that other resource types show up in the documentation.

func (*Master) NewBootstrapController

func (m *Master) NewBootstrapController() *Controller

NewBootstrapController returns a controller for watching the core capabilities of the master.