master

Documentation

Overview

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

Index

• func NewEtcdHelper(client tools.EtcdGetSet, version string) (helper tools.EtcdHelper, err error)
• func NewHandlerContainer(mux *http.ServeMux) *restful.Container
• func NewIPCache(cp cloudprovider.Interface, clock util.Clock, ttl time.Duration) *ipCache
• func RESTStorageToNodes(storage apiserver.RESTStorage) client.NodesInterface
• type Config
• type IPGetter
• 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()
• type PodCache
  • func NewPodCache(ipCache IPGetter, info client.PodInfoGetter, nodes client.NodeInterface, ...) *PodCache
  • func (p *PodCache) GetPodStatus(namespace, name string) (*api.PodStatus, error)
  • func (p *PodCache) UpdateAllContainers()

Functions

func NewEtcdHelper

func NewEtcdHelper(client tools.EtcdGetSet, version 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

func NewIPCache

func NewIPCache(cp cloudprovider.Interface, clock util.Clock, ttl time.Duration) *ipCache

NewIPCache makes a new ip caching layer, which will get IP addresses from cp, and use clock for deciding when to re-get an IP address. Thread-safe.

TODO: when we switch to go1.4, this class would be a good candidate for something that could be produced from a template and a type via `go generate`.

func RESTStorageToNodes

func RESTStorageToNodes(storage apiserver.RESTStorage) client.NodesInterface

RESTStorageToNodes will take a RESTStorage object and return a client interface which will work for any use expecting a client.Nodes() interface. The advantage of doing this in server code is that it doesn't require an actual trip through the network.

TODO: considering that the only difference between the various client types and RESTStorage type is the type of the arguments, maybe use "go generate" to write a specialized adaptor for every client type?

TODO: this also means that pod and node API endpoints have to be colocated in the same process

Types

type Config

type Config struct {
	Client                 *client.Client
	Cloud                  cloudprovider.Interface
	EtcdHelper             tools.EtcdHelper
	HealthCheckMinions     bool
	EventTTL               time.Duration
	MinionRegexp           string
	KubeletClient          client.KubeletClient
	PortalNet              *net.IPNet
	EnableLogsSupport      bool
	EnableUISupport        bool
	EnableSwaggerSupport   bool
	EnableV1Beta3          bool
	APIPrefix              string
	CorsAllowedOriginList  util.StringList
	Authenticator          authenticator.Request
	Authorizer             authorizer.Authorizer
	AdmissionControl       admission.Interface
	MasterServiceNamespace string

	// 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 443 if not set.
	ReadWritePort int

	// If empty, the first result from net.InterfaceAddrs will be used.
	PublicAddress string
}

Config is a structure used to configure a Master.

type IPGetter

type IPGetter interface {
	GetInstanceIP(host string) (ip string)
}

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:

PortalNet
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.

type PodCache

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

PodCache contains both a cache of container information, as well as the mechanism for keeping that cache up to date.

func NewPodCache

func NewPodCache(ipCache IPGetter, info client.PodInfoGetter, nodes client.NodeInterface, pods pod.Registry) *PodCache

NewPodCache returns a new PodCache which watches container information registered in the given PodRegistry. TODO(lavalamp): pods should be a client.PodInterface.

func (*PodCache) GetPodStatus

func (p *PodCache) GetPodStatus(namespace, name string) (*api.PodStatus, error)

GetPodStatus gets the stored pod status.

func (*PodCache) UpdateAllContainers

func (p *PodCache) UpdateAllContainers()

UpdateAllContainers updates information about all containers. Callers should let one call to UpdateAllContainers finish before calling again, or risk having new info getting clobbered by delayed old info.