xds

package
v1.40.0 Latest Latest
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 Go to latest Published: Aug 12, 2021 License: Apache-2.0 Imports: 25 Imported by: 117

Documentation

Overview

Package xds contains an implementation of the xDS suite of protocols, to be used by gRPC client and server applications.

On the client-side, users simply need to import this package to get all xDS functionality. On the server-side, users need to use the GRPCServer type exported by this package instead of the regular grpc.Server.

See https://github.com/grpc/grpc-go/tree/master/examples/features/xds for example.

Experimental

Notice: All APIs in this package are experimental and may be removed in a later release.

Index

Constants

View Source 
const (
	// ServingModeServing indicates the the server contains all required xDS
	// configuration is serving RPCs.
	ServingModeServing = iserver.ServingModeServing
	// ServingModeNotServing indicates that the server is not accepting new
	// connections. Existing connections will be closed gracefully, allowing
	// in-progress RPCs to complete. A server enters this mode when it does not
	// contain the required xDS configuration to serve RPCs.
	ServingModeNotServing = iserver.ServingModeNotServing
)

Variables

This section is empty.

Functions

func BootstrapContentsForTesting added in v1.39.0 

func BootstrapContentsForTesting(contents []byte) grpc.ServerOption

BootstrapContentsForTesting returns a grpc.ServerOption which allows users to inject a bootstrap configuration used by only this server, instead of the global configuration from the environment variables.

Testing Only

This function should ONLY be used for testing and may not work with some other features, including the CSDS service.

func NewXDSResolverWithConfigForTesting added in v1.39.0 

func NewXDSResolverWithConfigForTesting(bootstrapConfig []byte) (resolver.Builder, error)

NewXDSResolverWithConfigForTesting creates a new xds resolver builder using the provided xds bootstrap config instead of the global configuration from the supported environment variables. The resolver.Builder is meant to be used in conjunction with the grpc.WithResolvers DialOption.

Testing Only

This function should ONLY be used for testing and may not work with some other features, including the CSDS service.

func ServingModeCallback added in v1.38.0 

func ServingModeCallback(cb ServingModeCallbackFunc) grpc.ServerOption

ServingModeCallback returns a grpc.ServerOption which allows users to register a callback to get notified about serving mode changes.

Types

type GRPCServer 

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

GRPCServer wraps a gRPC server and provides server-side xDS functionality, by communication with a management server using xDS APIs. It implements the grpc.ServiceRegistrar interface and can be passed to service registration functions in IDL generated code.

func NewGRPCServer 

func NewGRPCServer(opts ...grpc.ServerOption) *GRPCServer

NewGRPCServer creates an xDS-enabled gRPC server using the passed in opts. The underlying gRPC server has no service registered and has not started to accept requests yet.

func (*GRPCServer) GetServiceInfo added in v1.39.0 

func (s *GRPCServer) GetServiceInfo() map[string]grpc.ServiceInfo

GetServiceInfo returns a map from service names to ServiceInfo. Service names include the package names, in the form of <package>.<service>.

func (*GRPCServer) GracefulStop 

func (s *GRPCServer) GracefulStop()

GracefulStop stops the underlying gRPC server gracefully. It stops the server from accepting new connections and RPCs and blocks until all the pending RPCs are finished.

func (*GRPCServer) RegisterService 

func (s *GRPCServer) RegisterService(sd *grpc.ServiceDesc, ss interface{})

RegisterService registers a service and its implementation to the underlying gRPC server. It is called from the IDL generated code. This must be called before invoking Serve.

func (*GRPCServer) Serve 

func (s *GRPCServer) Serve(lis net.Listener) error

Serve gets the underlying gRPC server to accept incoming connections on the listener lis, which is expected to be listening on a TCP port.

A connection to the management server, to receive xDS configuration, is initiated here.

Serve will return a non-nil error unless Stop or GracefulStop is called.

func (*GRPCServer) Stop 

func (s *GRPCServer) Stop()

Stop stops the underlying gRPC server. It immediately closes all open connections. It cancels all active RPCs on the server side and the corresponding pending RPCs on the client side will get notified by connection errors.

type ServingMode added in v1.38.0 

type ServingMode = iserver.ServingMode

ServingMode indicates the current mode of operation of the server.

type ServingModeCallbackFunc added in v1.38.0 

type ServingModeCallbackFunc func(addr net.Addr, args ServingModeChangeArgs)

ServingModeCallbackFunc is the callback that users can register to get notified about the server's serving mode changes. The callback is invoked with the address of the listener and its new mode.

Users must not perform any blocking operations in this callback.

type ServingModeChangeArgs added in v1.38.0 

type ServingModeChangeArgs struct {
	// Mode is the new serving mode of the server listener.
	Mode ServingMode
	// Err is set to a non-nil error if the server has transitioned into
	// not-serving mode.
	Err error
}

ServingModeChangeArgs wraps the arguments passed to the serving mode callback function.

Source Files

View all Source files

Directories

Path Synopsis
Package csds implements features to dump the status (xDS responses) the xds_client is using.
 Package csds implements features to dump the status (xDS responses) the xds_client is using.
Package googledirectpath implements a resolver that configures xds to make cloud to prod directpath connection.
 Package googledirectpath implements a resolver that configures xds to make cloud to prod directpath connection.
Package internal contains functions/structs shared by xds balancers/resolvers.
 Package internal contains functions/structs shared by xds balancers/resolvers.
balancer
Package balancer installs all the xds balancers.
 Package balancer installs all the xds balancers.
balancer/balancergroup
Package balancergroup implements a utility struct to bind multiple balancers into one balancer.
 Package balancergroup implements a utility struct to bind multiple balancers into one balancer.
balancer/cdsbalancer
Package cdsbalancer implements a balancer to handle CDS responses.
 Package cdsbalancer implements a balancer to handle CDS responses.
balancer/clusterimpl
Package clusterimpl implements the xds_cluster_impl balancing policy.
 Package clusterimpl implements the xds_cluster_impl balancing policy.
balancer/clustermanager
Package clustermanager implements the cluster manager LB policy for xds.
 Package clustermanager implements the cluster manager LB policy for xds.
balancer/clusterresolver
Package clusterresolver contains EDS balancer implementation.
 Package clusterresolver contains EDS balancer implementation.
balancer/loadstore
Package loadstore contains the loadStoreWrapper shared by the balancers.
 Package loadstore contains the loadStoreWrapper shared by the balancers.
balancer/orca
Package orca implements Open Request Cost Aggregation.
 Package orca implements Open Request Cost Aggregation.
balancer/priority
Package priority implements the priority balancer.
 Package priority implements the priority balancer.
balancer/ringhash
Package ringhash contains the functionality to support Ring Hash in grpc.
 Package ringhash contains the functionality to support Ring Hash in grpc.
balancer/weightedtarget
Package weightedtarget implements the weighted_target balancer.
 Package weightedtarget implements the weighted_target balancer.
balancer/weightedtarget/weightedaggregator
Package weightedaggregator implements state aggregator for weighted_target balancer.
 Package weightedaggregator implements state aggregator for weighted_target balancer.
httpfilter
Package httpfilter contains the HTTPFilter interface and a registry for storing and retrieving their implementations.
 Package httpfilter contains the HTTPFilter interface and a registry for storing and retrieving their implementations.
httpfilter/fault
Package fault implements the Envoy Fault Injection HTTP filter.
 Package fault implements the Envoy Fault Injection HTTP filter.
httpfilter/router
Package router implements the Envoy Router HTTP filter.
 Package router implements the Envoy Router HTTP filter.
resolver
Package resolver implements the xds resolver, that does LDS and RDS to find the cluster to use.
 Package resolver implements the xds resolver, that does LDS and RDS to find the cluster to use.
server
Package server contains internal server-side functionality used by the public facing xds package.
 Package server contains internal server-side functionality used by the public facing xds package.
testutils
Package testutils provides utility types, for use in xds tests.
 Package testutils provides utility types, for use in xds tests.
testutils/e2e
Package e2e provides utilities for end2end testing of xDS functionality.
 Package e2e provides utilities for end2end testing of xDS functionality.
testutils/fakeclient
Package fakeclient provides a fake implementation of an xDS client.
 Package fakeclient provides a fake implementation of an xDS client.
testutils/fakeserver
Package fakeserver provides a fake implementation of the management server.
 Package fakeserver provides a fake implementation of the management server.
version
Package version defines constants to distinguish between supported xDS API versions.
 Package version defines constants to distinguish between supported xDS API versions.
xdsclient
Package xdsclient implements a full fledged gRPC client for the xDS API used by the xds resolver and balancer implementations.
 Package xdsclient implements a full fledged gRPC client for the xDS API used by the xds resolver and balancer implementations.
xdsclient/bootstrap
Package bootstrap provides the functionality to initialize certain aspects of an xDS client by reading a bootstrap file.
 Package bootstrap provides the functionality to initialize certain aspects of an xDS client by reading a bootstrap file.
xdsclient/load
Package load provides functionality to record and maintain load data.
 Package load provides functionality to record and maintain load data.
xdsclient/v2
Package v2 provides xDS v2 transport protocol specific functionality.
 Package v2 provides xDS v2 transport protocol specific functionality.
xdsclient/v3
Package v3 provides xDS v3 transport protocol specific functionality.
 Package v3 provides xDS v3 transport protocol specific functionality.

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