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k8s.io/client-go / discovery

Package discovery

v0.19.3
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The highest tagged major version is .

Published: Oct 20, 2020 | License: Apache-2.0 | Module: k8s.io/client-go

Overview

Package discovery provides ways to discover server-supported API groups, versions and resources.

Index

func FilteredBy

func FilteredBy(pred ResourcePredicate, rls []*metav1.APIResourceList) []*metav1.APIResourceList

FilteredBy filters by the given predicate. Empty APIResourceLists are dropped.

func GroupVersionResources

func GroupVersionResources(rls []*metav1.APIResourceList) (map[schema.GroupVersionResource]struct{}, error)

GroupVersionResources converts APIResourceLists to the GroupVersionResources.

func IsGroupDiscoveryFailedError

func IsGroupDiscoveryFailedError(err error) bool

IsGroupDiscoveryFailedError returns true if the provided error indicates the server was unable to discover a complete list of APIs for the client to use.

func MatchesServerVersion

func MatchesServerVersion(clientVersion apimachineryversion.Info, client DiscoveryInterface) error

MatchesServerVersion queries the server to compares the build version (git hash) of the client with the server's build version. It returns an error if it failed to contact the server or if the versions are not an exact match.

func ServerGroupsAndResources

func ServerGroupsAndResources(d DiscoveryInterface) ([]*metav1.APIGroup, []*metav1.APIResourceList, error)

func ServerPreferredNamespacedResources

func ServerPreferredNamespacedResources(d DiscoveryInterface) ([]*metav1.APIResourceList, error)

ServerPreferredNamespacedResources uses the provided discovery interface to look up preferred namespaced resources

func ServerPreferredResources

func ServerPreferredResources(d DiscoveryInterface) ([]*metav1.APIResourceList, error)

ServerPreferredResources uses the provided discovery interface to look up preferred resources

func ServerResources

func ServerResources(d DiscoveryInterface) ([]*metav1.APIResourceList, error)

ServerResources uses the provided discovery interface to look up supported resources for all groups and versions. Deprecated: use ServerGroupsAndResources instead.

func ServerSupportsVersion

func ServerSupportsVersion(client DiscoveryInterface, requiredGV schema.GroupVersion) error

ServerSupportsVersion returns an error if the server doesn't have the required version

type CachedDiscoveryInterface

type CachedDiscoveryInterface interface {
	DiscoveryInterface
	// Fresh is supposed to tell the caller whether or not to retry if the cache
	// fails to find something (false = retry, true = no need to retry).
	//
	// TODO: this needs to be revisited, this interface can't be locked properly
	// and doesn't make a lot of sense.
	Fresh() bool
	// Invalidate enforces that no cached data that is older than the current time
	// is used.
	Invalidate()
}

CachedDiscoveryInterface is a DiscoveryInterface with cache invalidation and freshness. Note that If the ServerResourcesForGroupVersion method returns a cache miss error, the user needs to explicitly call Invalidate to clear the cache, otherwise the same cache miss error will be returned next time.

type DiscoveryClient

type DiscoveryClient struct {
	LegacyPrefix string
	// contains filtered or unexported fields
}

DiscoveryClient implements the functions that discover server-supported API groups, versions and resources.

func NewDiscoveryClient

func NewDiscoveryClient(c restclient.Interface) *DiscoveryClient

NewDiscoveryClient returns a new DiscoveryClient for the given RESTClient.

func NewDiscoveryClientForConfig

func NewDiscoveryClientForConfig(c *restclient.Config) (*DiscoveryClient, error)

NewDiscoveryClientForConfig creates a new DiscoveryClient for the given config. This client can be used to discover supported resources in the API server.

func NewDiscoveryClientForConfigOrDie

func NewDiscoveryClientForConfigOrDie(c *restclient.Config) *DiscoveryClient

NewDiscoveryClientForConfigOrDie creates a new DiscoveryClient for the given config. If there is an error, it panics.

func (*DiscoveryClient) OpenAPISchema

func (d *DiscoveryClient) OpenAPISchema() (*openapi_v2.Document, error)

OpenAPISchema fetches the open api schema using a rest client and parses the proto.

func (*DiscoveryClient) RESTClient

func (d *DiscoveryClient) RESTClient() restclient.Interface

RESTClient returns a RESTClient that is used to communicate with API server by this client implementation.

func (*DiscoveryClient) ServerGroups

func (d *DiscoveryClient) ServerGroups() (apiGroupList *metav1.APIGroupList, err error)

ServerGroups returns the supported groups, with information like supported versions and the preferred version.

func (*DiscoveryClient) ServerGroupsAndResources

func (d *DiscoveryClient) ServerGroupsAndResources() ([]*metav1.APIGroup, []*metav1.APIResourceList, error)

ServerGroupsAndResources returns the supported resources for all groups and versions.

func (*DiscoveryClient) ServerPreferredNamespacedResources

func (d *DiscoveryClient) ServerPreferredNamespacedResources() ([]*metav1.APIResourceList, error)

ServerPreferredNamespacedResources returns the supported namespaced resources with the version preferred by the server.

func (*DiscoveryClient) ServerPreferredResources

func (d *DiscoveryClient) ServerPreferredResources() ([]*metav1.APIResourceList, error)

ServerPreferredResources returns the supported resources with the version preferred by the server.

func (*DiscoveryClient) ServerResources

func (d *DiscoveryClient) ServerResources() ([]*metav1.APIResourceList, error)

ServerResources returns the supported resources for all groups and versions. Deprecated: use ServerGroupsAndResources instead.

func (*DiscoveryClient) ServerResourcesForGroupVersion

func (d *DiscoveryClient) ServerResourcesForGroupVersion(groupVersion string) (resources *metav1.APIResourceList, err error)

ServerResourcesForGroupVersion returns the supported resources for a group and version.

func (*DiscoveryClient) ServerVersion

func (d *DiscoveryClient) ServerVersion() (*version.Info, error)

ServerVersion retrieves and parses the server's version (git version).

type DiscoveryInterface

type DiscoveryInterface interface {
	RESTClient() restclient.Interface
	ServerGroupsInterface
	ServerResourcesInterface
	ServerVersionInterface
	OpenAPISchemaInterface
}

DiscoveryInterface holds the methods that discover server-supported API groups, versions and resources.

type ErrGroupDiscoveryFailed

type ErrGroupDiscoveryFailed struct {
	// Groups is a list of the groups that failed to load and the error cause
	Groups map[schema.GroupVersion]error
}

ErrGroupDiscoveryFailed is returned if one or more API groups fail to load.

func (*ErrGroupDiscoveryFailed) Error

func (e *ErrGroupDiscoveryFailed) Error() string

Error implements the error interface

type OpenAPISchemaInterface

type OpenAPISchemaInterface interface {
	// OpenAPISchema retrieves and parses the swagger API schema the server supports.
	OpenAPISchema() (*openapi_v2.Document, error)
}

OpenAPISchemaInterface has a method to retrieve the open API schema.

type ResourcePredicate

type ResourcePredicate interface {
	Match(groupVersion string, r *metav1.APIResource) bool
}

ResourcePredicate has a method to check if a resource matches a given condition.

type ResourcePredicateFunc

type ResourcePredicateFunc func(groupVersion string, r *metav1.APIResource) bool

ResourcePredicateFunc returns true if it matches a resource based on a custom condition.

func (ResourcePredicateFunc) Match

func (fn ResourcePredicateFunc) Match(groupVersion string, r *metav1.APIResource) bool

Match is a wrapper around ResourcePredicateFunc.

type ServerGroupsInterface

type ServerGroupsInterface interface {
	// ServerGroups returns the supported groups, with information like supported versions and the
	// preferred version.
	ServerGroups() (*metav1.APIGroupList, error)
}

ServerGroupsInterface has methods for obtaining supported groups on the API server

type ServerResourcesInterface

type ServerResourcesInterface interface {
	// ServerResourcesForGroupVersion returns the supported resources for a group and version.
	ServerResourcesForGroupVersion(groupVersion string) (*metav1.APIResourceList, error)
	// ServerResources returns the supported resources for all groups and versions.
	//
	// The returned resource list might be non-nil with partial results even in the case of
	// non-nil error.
	//
	// Deprecated: use ServerGroupsAndResources instead.
	ServerResources() ([]*metav1.APIResourceList, error)
	// ServerResources returns the supported groups and resources for all groups and versions.
	//
	// The returned group and resource lists might be non-nil with partial results even in the
	// case of non-nil error.
	ServerGroupsAndResources() ([]*metav1.APIGroup, []*metav1.APIResourceList, error)
	// ServerPreferredResources returns the supported resources with the version preferred by the
	// server.
	//
	// The returned group and resource lists might be non-nil with partial results even in the
	// case of non-nil error.
	ServerPreferredResources() ([]*metav1.APIResourceList, error)
	// ServerPreferredNamespacedResources returns the supported namespaced resources with the
	// version preferred by the server.
	//
	// The returned resource list might be non-nil with partial results even in the case of
	// non-nil error.
	ServerPreferredNamespacedResources() ([]*metav1.APIResourceList, error)
}

ServerResourcesInterface has methods for obtaining supported resources on the API server

type ServerVersionInterface

type ServerVersionInterface interface {
	// ServerVersion retrieves and parses the server's version (git version).
	ServerVersion() (*version.Info, error)
}

ServerVersionInterface has a method for retrieving the server's version.

type SupportsAllVerbs

type SupportsAllVerbs struct {
	Verbs []string
}

SupportsAllVerbs is a predicate matching a resource iff all given verbs are supported.

func (SupportsAllVerbs) Match

func (p SupportsAllVerbs) Match(groupVersion string, r *metav1.APIResource) bool

Match checks if a resource contains all the given verbs.

Package Files

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

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