| /* |
| * Copyright 2019 The gRPC Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package io.grpc.xds; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| import com.google.auto.value.AutoValue; |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import io.grpc.ChannelCredentials; |
| import io.grpc.Internal; |
| import io.grpc.xds.EnvoyProtoData.Node; |
| import java.util.List; |
| import java.util.Map; |
| import javax.annotation.Nullable; |
| |
| /** |
| * Loads configuration information to bootstrap gRPC's integration of xDS protocol. |
| */ |
| @Internal |
| public abstract class Bootstrapper { |
| |
| static final String XDSTP_SCHEME = "xdstp:"; |
| |
| /** |
| * Returns system-loaded bootstrap configuration. |
| */ |
| public abstract BootstrapInfo bootstrap() throws XdsInitializationException; |
| |
| /** |
| * Returns bootstrap configuration given by the raw data in JSON format. |
| */ |
| BootstrapInfo bootstrap(Map<String, ?> rawData) throws XdsInitializationException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Data class containing xDS server information, such as server URI and channel credentials |
| * to be used for communication. |
| */ |
| @AutoValue |
| @Internal |
| abstract static class ServerInfo { |
| abstract String target(); |
| |
| abstract ChannelCredentials channelCredentials(); |
| |
| abstract boolean useProtocolV3(); |
| |
| abstract boolean ignoreResourceDeletion(); |
| |
| @VisibleForTesting |
| static ServerInfo create( |
| String target, ChannelCredentials channelCredentials, boolean useProtocolV3) { |
| return new AutoValue_Bootstrapper_ServerInfo(target, channelCredentials, useProtocolV3, |
| false); |
| } |
| |
| @VisibleForTesting |
| static ServerInfo create( |
| String target, ChannelCredentials channelCredentials, boolean useProtocolV3, |
| boolean ignoreResourceDeletion) { |
| return new AutoValue_Bootstrapper_ServerInfo(target, channelCredentials, useProtocolV3, |
| ignoreResourceDeletion); |
| } |
| } |
| |
| /** |
| * Data class containing Certificate provider information: the plugin-name and an opaque |
| * Map that represents the config for that plugin. |
| */ |
| @AutoValue |
| @Internal |
| public abstract static class CertificateProviderInfo { |
| public abstract String pluginName(); |
| |
| public abstract ImmutableMap<String, ?> config(); |
| |
| @VisibleForTesting |
| public static CertificateProviderInfo create(String pluginName, Map<String, ?> config) { |
| return new AutoValue_Bootstrapper_CertificateProviderInfo( |
| pluginName, ImmutableMap.copyOf(config)); |
| } |
| } |
| |
| @AutoValue |
| abstract static class AuthorityInfo { |
| |
| /** |
| * A template for the name of the Listener resource to subscribe to for a gRPC client |
| * channel. Used only when the channel is created using an "xds:" URI with this authority |
| * name. |
| * |
| * <p>The token "%s", if present in this string, will be replaced with %-encoded |
| * service authority (i.e., the path part of the target URI used to create the gRPC channel). |
| * |
| * <p>Return value must start with {@code "xdstp://<authority_name>/"}. |
| */ |
| abstract String clientListenerResourceNameTemplate(); |
| |
| /** |
| * Ordered list of xDS servers to contact for this authority. |
| * |
| * <p>If the same server is listed in multiple authorities, the entries will be de-duped (i.e., |
| * resources for both authorities will be fetched on the same ADS stream). |
| * |
| * <p>Defaults to the top-level server list {@link BootstrapInfo#servers()}. Must not be empty. |
| */ |
| abstract ImmutableList<ServerInfo> xdsServers(); |
| |
| static AuthorityInfo create( |
| String clientListenerResourceNameTemplate, List<ServerInfo> xdsServers) { |
| checkArgument(!xdsServers.isEmpty(), "xdsServers must not be empty"); |
| return new AutoValue_Bootstrapper_AuthorityInfo( |
| clientListenerResourceNameTemplate, ImmutableList.copyOf(xdsServers)); |
| } |
| } |
| |
| /** |
| * Data class containing the results of reading bootstrap. |
| */ |
| @AutoValue |
| @Internal |
| public abstract static class BootstrapInfo { |
| /** Returns the list of xDS servers to be connected to. Must not be empty. */ |
| abstract ImmutableList<ServerInfo> servers(); |
| |
| /** Returns the node identifier to be included in xDS requests. */ |
| public abstract Node node(); |
| |
| /** Returns the cert-providers config map. */ |
| @Nullable |
| public abstract ImmutableMap<String, CertificateProviderInfo> certProviders(); |
| |
| /** |
| * A template for the name of the Listener resource to subscribe to for a gRPC server. |
| * |
| * <p>If starts with "xdstp:", will be interpreted as a new-style name, in which case the |
| * authority of the URI will be used to select the relevant configuration in the |
| * "authorities" map. The token "%s", if present in this string, will be replaced with |
| * the IP and port on which the server is listening. If the template starts with "xdstp:", |
| * the replaced string will be %-encoded. |
| * |
| * <p>There is no default; if unset, xDS-based server creation fails. |
| */ |
| @Nullable |
| public abstract String serverListenerResourceNameTemplate(); |
| |
| /** |
| * A template for the name of the Listener resource to subscribe to for a gRPC client channel. |
| * Used only when the channel is created with an "xds:" URI with no authority. |
| * |
| * <p>If starts with "xdstp:", will be interpreted as a new-style name, in which case the |
| * authority of the URI will be used to select the relevant configuration in the "authorities" |
| * map. |
| * |
| * <p>The token "%s", if present in this string, will be replaced with the service authority |
| * (i.e., the path part of the target URI used to create the gRPC channel). If the template |
| * starts with "xdstp:", the replaced string will be %-encoded. |
| * |
| * <p>Defaults to {@code "%s"}. |
| */ |
| abstract String clientDefaultListenerResourceNameTemplate(); |
| |
| /** |
| * A map of authority name to corresponding configuration. |
| * |
| * <p>This is used in the following cases: |
| * |
| * <ul> |
| * <li>A gRPC client channel is created using an "xds:" URI that includes an |
| * authority.</li> |
| * |
| * <li>A gRPC client channel is created using an "xds:" URI with no authority, |
| * but the "client_default_listener_resource_name_template" field above turns it into an |
| * "xdstp:" URI.</li> |
| * |
| * <li>A gRPC server is created and the "server_listener_resource_name_template" field is an |
| * "xdstp:" URI.</li> |
| * </ul> |
| * |
| * <p>In any of those cases, it is an error if the specified authority is not present in this |
| * map. |
| * |
| * <p>Defaults to an empty map. |
| */ |
| abstract ImmutableMap<String, AuthorityInfo> authorities(); |
| |
| @VisibleForTesting |
| static Builder builder() { |
| return new AutoValue_Bootstrapper_BootstrapInfo.Builder() |
| .clientDefaultListenerResourceNameTemplate("%s") |
| .authorities(ImmutableMap.<String, AuthorityInfo>of()); |
| } |
| |
| @AutoValue.Builder |
| @VisibleForTesting |
| abstract static class Builder { |
| |
| abstract Builder servers(List<ServerInfo> servers); |
| |
| abstract Builder node(Node node); |
| |
| abstract Builder certProviders(@Nullable Map<String, CertificateProviderInfo> certProviders); |
| |
| abstract Builder serverListenerResourceNameTemplate( |
| @Nullable String serverListenerResourceNameTemplate); |
| |
| abstract Builder clientDefaultListenerResourceNameTemplate( |
| String clientDefaultListenerResourceNameTemplate); |
| |
| abstract Builder authorities(Map<String, AuthorityInfo> authorities); |
| |
| abstract BootstrapInfo build(); |
| } |
| } |
| } |