master

package
v0.1.0 Latest Latest
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 Go to latest Published: Feb 3, 2016 License: Apache-2.0, Apache-2.0 Imports: 82 Imported by: 0

Documentation

Overview

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

Index

Constants

View Source 
const (
	DefaultEtcdPathPrefix = "/registry"
)

Variables

This section is empty.

Functions

func NewHandlerContainer 

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

Types

type APIGroupVersionOverride 

type APIGroupVersionOverride struct {
	// Whether to enable or disable this group version.
	Disable bool
	// List of overrides for individual resources in this group version.
	ResourceOverrides map[string]bool
}

Specifies the overrides for various API group versions. This can be used to enable/disable entire group versions or specific resources.

type AddressFunc 

type AddressFunc func() (addresses []string, err error)

type Config 

type Config struct {
	StorageDestinations StorageDestinations
	// StorageVersions is a map between groups and their storage versions
	StorageVersions map[string]string
	EventTTL        time.Duration
	KubeletClient   kubeletclient.KubeletClient
	// allow downstream consumers to disable the core controller loops
	EnableCoreControllers bool
	EnableLogsSupport     bool
	EnableUISupport       bool
	// allow downstream consumers to disable swagger
	EnableSwaggerSupport bool
	// Allows api group versions or specific resources to be conditionally enabled/disabled.
	APIGroupVersionOverrides map[string]APIGroupVersionOverride
	// allow downstream consumers to disable the index route
	EnableIndex           bool
	EnableProfiling       bool
	EnableWatchCache      bool
	APIPrefix             string
	APIGroupPrefix        string
	CorsAllowedOriginList []string
	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

	// If specified, requests will be allocated a random timeout between this value, and twice this value.
	// Note that it is up to the request handlers to ignore or honor this timeout. In seconds.
	MinRequestTimeout int

	// 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-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

	// PublicAddress is the IP address where members of the cluster (kubelet,
	// kube-proxy, services, etc.) can reach the master.
	// If nil or 0.0.0.0, the host's default interface 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 IP address for the master service (must be inside ServiceClusterIPRange
	ServiceReadWriteIP net.IP

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

	// Used to customize default proxy dial/tls options
	ProxyDialer          apiserver.ProxyDialerFunc
	ProxyTLSClientConfig *tls.Config

	// Used to start and monitor tunneling
	Tunneler Tunneler

	// Additional ports to be exposed on the master service
	// extraServicePorts is injectable in the event that more ports
	// (other than the default 443/tcp) are exposed on the master
	// and those ports need to be load balanced by the master
	// service because this pkg is linked by out-of-tree projects
	// like openshift which want to use the master but also do
	// more stuff.
	ExtraServicePorts []api.ServicePort
	// Additional ports to be exposed on the master endpoints
	// Port names should align with ports defined in ExtraServicePorts
	ExtraEndpointPorts []api.EndpointPort

	KubernetesServiceNodePort int
}

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
	ExtraServicePorts         []api.ServicePort
	ExtraEndpointPorts        []api.EndpointPort
	PublicServicePort         int
	KubernetesServiceNodePort int
	// contains filtered or unexported fields
}

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

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) CreateOrUpdateMasterServiceIfNeeded 

func (c *Controller) CreateOrUpdateMasterServiceIfNeeded(serviceName string, serviceIP net.IP, servicePorts []api.ServicePort, serviceType api.ServiceType, reconcile bool) error

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

func (*Controller) ReconcileEndpoints 

func (c *Controller) ReconcileEndpoints(serviceName string, ip net.IP, endpointPorts []api.EndpointPort, reconcilePorts bool) error

ReconcileEndpoints sets the endpoints for the given apiserver service (ro or rw). ReconcileEndpoints expects that the endpoints objects it manages will all be managed only by ReconcileEndpoints; 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 ReconcileEndpoints and only ReconcileEndpoints 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).
  • ReconcileEndpoints is called periodically from all apiservers.

func (*Controller) RunKubernetesService 

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

RunKubernetesService periodically updates the kubernetes service

func (*Controller) Start 

func (c *Controller) Start()

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

func (*Controller) UpdateKubernetesService 

func (c *Controller) UpdateKubernetesService(reconcile bool) error

UpdateKubernetesService attempts to update the default Kube service.

type InstallSSHKey 

type InstallSSHKey func(user string, data []byte) error

type Master 

type Master struct {

	// "Outputs"
	Handler         http.Handler
	InsecureHandler http.Handler

	KubernetesServiceNodePort int
	// 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
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 miscellaneous 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) HasThirdPartyResource 

func (m *Master) HasThirdPartyResource(rsrc *expapi.ThirdPartyResource) (bool, error)

HasThirdPartyResource returns true if a particular third party resource currently installed.

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) InstallThirdPartyResource 

func (m *Master) InstallThirdPartyResource(rsrc *expapi.ThirdPartyResource) error

InstallThirdPartyResource installs a third party resource specified by 'rsrc'. When a resource is installed a corresponding RESTful resource is added as a valid path in the web service provided by the master.

For example, if you install a resource ThirdPartyResource{ Name: "foo.company.com", Versions: {"v1"} } then the following RESTful resource is created on the server: 

http://<host>/apis/company.com/v1/foos/...

func (*Master) IsTunnelSyncHealthy 

func (m *Master) IsTunnelSyncHealthy(req *http.Request) error

func (*Master) ListThirdPartyResources 

func (m *Master) ListThirdPartyResources() []string

ListThirdPartyResources lists all currently installed third party resources

func (*Master) NewBootstrapController 

func (m *Master) NewBootstrapController() *Controller

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

func (*Master) RemoveThirdPartyResource 

func (m *Master) RemoveThirdPartyResource(path string) error

RemoveThirdPartyResource removes all resources matching `path`. Also deletes any stored data

type SSHTunneler 

type SSHTunneler struct {
	SSHUser       string
	SSHKeyfile    string
	InstallSSHKey InstallSSHKey
	// contains filtered or unexported fields
}

func (*SSHTunneler) Dial 

func (c *SSHTunneler) Dial(net, addr string) (net.Conn, error)

func (*SSHTunneler) Run 

func (c *SSHTunneler) Run(getAddresses AddressFunc)

Run establishes tunnel loops and returns

func (*SSHTunneler) SecondsSinceSync 

func (c *SSHTunneler) SecondsSinceSync() int64

func (*SSHTunneler) Stop 

func (c *SSHTunneler) Stop()

Stop gracefully shuts down the tunneler

type StorageDestinations 

type StorageDestinations struct {
	APIGroups map[string]*StorageDestinationsForAPIGroup
}

StorageDestinations is a mapping from API group & resource to the underlying storage interfaces.

func NewStorageDestinations 

func NewStorageDestinations() StorageDestinations

func (*StorageDestinations) AddAPIGroup 

func (s *StorageDestinations) AddAPIGroup(group string, defaultStorage storage.Interface)

func (*StorageDestinations) AddStorageOverride 

func (s *StorageDestinations) AddStorageOverride(group, resource string, override storage.Interface)

type StorageDestinationsForAPIGroup 

type StorageDestinationsForAPIGroup struct {
	Default   storage.Interface
	Overrides map[string]storage.Interface
}

type ThirdPartyController 

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

ThirdPartyController is a control loop that knows how to synchronize ThirdPartyResource objects with RESTful resources which are present in the API server.

func (*ThirdPartyController) SyncOneResource 

func (t *ThirdPartyController) SyncOneResource(rsrc *expapi.ThirdPartyResource) error

Synchronize a single resource with RESTful resources on the master

func (*ThirdPartyController) SyncResources 

func (t *ThirdPartyController) SyncResources() error

Synchronize all resources with RESTful resources on the master

type Tunneler 

type Tunneler interface {
	Run(AddressFunc)
	Stop()
	Dial(net, addr string) (net.Conn, error)
	SecondsSinceSync() int64
}

func NewSSHTunneler 

func NewSSHTunneler(sshUser string, sshKeyfile string, installSSHKey InstallSSHKey) Tunneler

Source Files

View all Source files

Directories

Path Synopsis
Package ports defines ports used by various pieces of the kubernetes infrastructure.
 Package ports defines ports used by various pieces of the kubernetes infrastructure.

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