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Package config

v1.18.6
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Published: Jul 15, 2020 | License: Apache-2.0 | Module: k8s.io/kubernetes

Overview

Package config implements the pod configuration readers.

Package config implements the pod configuration readers.

Index

Package Files

Constants

const (
	// PodConfigNotificationUnknown is the default value for
	// PodConfigNotificationMode when uninitialized.
	PodConfigNotificationUnknown = iota
	// PodConfigNotificationSnapshot delivers the full configuration as a SET whenever
	// any change occurs.
	PodConfigNotificationSnapshot
	// PodConfigNotificationSnapshotAndUpdates delivers an UPDATE and DELETE message whenever pods are
	// changed, and a SET message if there are any additions or removals.
	PodConfigNotificationSnapshotAndUpdates
	// PodConfigNotificationIncremental delivers ADD, UPDATE, DELETE, REMOVE, RECONCILE to the update channel.
	PodConfigNotificationIncremental
)
const (
	DefaultKubeletPodsDirName                = "pods"
	DefaultKubeletVolumesDirName             = "volumes"
	DefaultKubeletVolumeSubpathsDirName      = "volume-subpaths"
	DefaultKubeletVolumeDevicesDirName       = "volumeDevices"
	DefaultKubeletPluginsDirName             = "plugins"
	DefaultKubeletPluginsRegistrationDirName = "plugins_registry"
	DefaultKubeletContainersDirName          = "containers"
	DefaultKubeletPluginContainersDirName    = "plugin-containers"
	DefaultKubeletPodResourcesDirName        = "pod-resources"
	KubeletPluginsDirSELinuxLabel            = "system_u:object_r:container_file_t:s0"
)

Defines sane defaults for the kubelet config.

func NewSourceApiserver

func NewSourceApiserver(c clientset.Interface, nodeName types.NodeName, updates chan<- interface{})

NewSourceApiserver creates a config source that watches and pulls from the apiserver.

func NewSourceFile

func NewSourceFile(path string, nodeName types.NodeName, period time.Duration, updates chan<- interface{})

NewSourceFile watches a config file for changes.

func NewSourceURL

func NewSourceURL(url string, header http.Header, nodeName types.NodeName, period time.Duration, updates chan<- interface{})

NewSourceURL specifies the URL where to read the Pod configuration from, then watches it for changes.

type ContainerRuntimeOptions

type ContainerRuntimeOptions struct {

	// ContainerRuntime is the container runtime to use.
	ContainerRuntime string
	// RuntimeCgroups that container runtime is expected to be isolated in.
	RuntimeCgroups string
	// RedirectContainerStreaming enables container streaming redirect.
	// When RedirectContainerStreaming is false, kubelet will proxy container streaming data
	// between apiserver and container runtime. This approach is more secure, but the proxy
	// introduces some overhead.
	// When RedirectContainerStreaming is true, kubelet will return an http redirect to apiserver,
	// and apiserver will access container runtime directly. This approach is more performant,
	// but less secure because the connection between apiserver and container runtime is not
	// authenticated.
	RedirectContainerStreaming bool

	// DockershimRootDirectory is the path to the dockershim root directory. Defaults to
	// /var/lib/dockershim if unset. Exposed for integration testing (e.g. in OpenShift).
	DockershimRootDirectory string
	// Enable dockershim only mode.
	ExperimentalDockershim bool
	// PodSandboxImage is the image whose network/ipc namespaces
	// containers in each pod will use.
	PodSandboxImage string
	// DockerEndpoint is the path to the docker endpoint to communicate with.
	DockerEndpoint string
	// If no pulling progress is made before the deadline imagePullProgressDeadline,
	// the image pulling will be cancelled. Defaults to 1m0s.
	// +optional
	ImagePullProgressDeadline metav1.Duration

	// networkPluginName is the name of the network plugin to be invoked for
	// various events in kubelet/pod lifecycle
	NetworkPluginName string
	// NetworkPluginMTU is the MTU to be passed to the network plugin,
	// and overrides the default MTU for cases where it cannot be automatically
	// computed (such as IPSEC).
	NetworkPluginMTU int32
	// CNIConfDir is the full path of the directory in which to search for
	// CNI config files
	CNIConfDir string
	// CNIBinDir is the full path of the directory in which to search for
	// CNI plugin binaries
	CNIBinDir string
	// CNICacheDir is the full path of the directory in which CNI should store
	// cache files
	CNICacheDir string
}

ContainerRuntimeOptions defines options for the container runtime.

func (*ContainerRuntimeOptions) AddFlags

func (s *ContainerRuntimeOptions) AddFlags(fs *pflag.FlagSet)

AddFlags adds flags to the container runtime, according to ContainerRuntimeOptions.

type PodConfig

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

PodConfig is a configuration mux that merges many sources of pod configuration into a single consistent structure, and then delivers incremental change notifications to listeners in order.

func NewPodConfig

func NewPodConfig(mode PodConfigNotificationMode, recorder record.EventRecorder) *PodConfig

NewPodConfig creates an object that can merge many configuration sources into a stream of normalized updates to a pod configuration.

func (*PodConfig) Channel

func (c *PodConfig) Channel(source string) chan<- interface{}

Channel creates or returns a config source channel. The channel only accepts PodUpdates

func (*PodConfig) Restore

func (c *PodConfig) Restore(path string, updates chan<- interface{}) error

Restore restores pods from the checkpoint path, *once*

func (*PodConfig) SeenAllSources

func (c *PodConfig) SeenAllSources(seenSources sets.String) bool

SeenAllSources returns true if seenSources contains all sources in the config, and also this config has received a SET message from each source.

func (*PodConfig) Sync

func (c *PodConfig) Sync()

Sync requests the full configuration be delivered to the update channel.

func (*PodConfig) Updates

func (c *PodConfig) Updates() <-chan kubetypes.PodUpdate

Updates returns a channel of updates to the configuration, properly denormalized.

type PodConfigNotificationMode

type PodConfigNotificationMode int

PodConfigNotificationMode describes how changes are sent to the update channel.

type SourcesReady

type SourcesReady interface {
	// AddSource adds the specified source to the set of sources managed.
	AddSource(source string)
	// AllReady returns true if the currently configured sources have all been seen.
	AllReady() bool
}

SourcesReady tracks the set of configured sources seen by the kubelet.

func NewSourcesReady

func NewSourcesReady(sourcesReadyFn SourcesReadyFn) SourcesReady

NewSourcesReady returns a SourcesReady with the specified function.

type SourcesReadyFn

type SourcesReadyFn func(sourcesSeen sets.String) bool

SourcesReadyFn is function that returns true if the specified sources have been seen.

Documentation was rendered with GOOS=linux and GOARCH=amd64.

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