discovery

package
v0.24.0-alpha.4 Latest Latest
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 Go to latest Published: Mar 22, 2022 License: Apache-2.0 Imports: 21 Imported by: 13,731

Documentation

Overview

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

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

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 IsResourceEnabled added in v0.24.0 

func IsResourceEnabled(client DiscoveryInterface, resourceToCheck schema.GroupVersionResource) (bool, error)

IsResourceEnabled queries the server to determine if the resource specified is present on the server. This is particularly helpful when writing a controller or an e2e test that requires a particular resource to function.

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

Types

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. NewDiscoveryClientForConfig is equivalent to NewDiscoveryClientForConfigAndClient(c, httpClient), where httpClient was generated with rest.HTTPClientFor(c).

func NewDiscoveryClientForConfigAndClient added in v0.23.0 

func NewDiscoveryClientForConfigAndClient(c *restclient.Config, httpClient *http.Client) (*DiscoveryClient, error)

NewDiscoveryClientForConfigAndClient creates a new DiscoveryClient for the given config. This client can be used to discover supported resources in the API server. Note the http client provided takes precedence over the configured transport values.

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)
	// ServerGroupsAndResources 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.

Source Files

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