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xds: implement cloud-to-prod resolver (#7900) 

Implemented CloudToProdNameResolver, which will be used for DirectPath with URI scheme "google-c2p". The resolver is only a wrapper that delegates name resolution either to DNS or xDS resolver depending on the environment. If it is delegating to the xDS resolver, it will send HTTP requests (to a local HTTP server) to fetch metadata that is used to generate a bootstrap config. The self-generated bootstrap will be used for xDS.
This commit is contained in:
Chengyuan Zhang 2021-02-23 12:27:47 -08:00 committed by GitHub
parent bfc67bfcf4
commit 2bfa0037ad
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
16 changed files with 776 additions and 74 deletions
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5
alts/build.gradle
View File

@ -56,7 +56,10 @@ import net.ltgt.gradle.errorprone.CheckSeverity
it.options.errorprone.check("FutureReturnValueIgnored", CheckSeverity.OFF)
}
javadoc { exclude 'io/grpc/alts/internal/**' }
javadoc {
exclude 'io/grpc/alts/internal/**'
exclude 'io/grpc/alts/Internal*'
}
jar {
// Must use a different classifier to avoid conflicting with shadowJar

2
alts/src/main/java/io/grpc/alts/AltsChannelCredentials.java
View File

@ -93,7 +93,7 @@ public final class AltsChannelCredentials {
}
InternalProtocolNegotiator.ClientFactory buildProtocolNegotiatorFactory() {
if (!CheckGcpEnvironment.isOnGcp()) {
if (!InternalCheckGcpEnvironment.isOnGcp()) {
if (enableUntrustedAlts) {
logger.log(
Level.WARNING,

2
alts/src/main/java/io/grpc/alts/AltsServerCredentials.java
View File

@ -76,7 +76,7 @@ public final class AltsServerCredentials {
}
InternalProtocolNegotiator.ProtocolNegotiator buildProtocolNegotiator() {
if (!CheckGcpEnvironment.isOnGcp()) {
if (!InternalCheckGcpEnvironment.isOnGcp()) {
if (enableUntrustedAlts) {
logger.log(
Level.WARNING,

2
alts/src/main/java/io/grpc/alts/ComputeEngineChannelCredentials.java
View File

@ -49,7 +49,7 @@ public final class ComputeEngineChannelCredentials {
ChannelCredentials nettyCredentials =
InternalNettyChannelCredentials.create(createClientFactory());
CallCredentials callCredentials;
if (CheckGcpEnvironment.isOnGcp()) {
if (InternalCheckGcpEnvironment.isOnGcp()) {
callCredentials = MoreCallCredentials.from(ComputeEngineCredentials.create());
} else {
callCredentials = new FailingCallCredentials(

20
alts/src/main/java/io/grpc/alts/CheckGcpEnvironment.java → alts/src/main/java/io/grpc/alts/InternalCheckGcpEnvironment.java
View File

@ -19,6 +19,7 @@ package io.grpc.alts;
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.common.annotations.VisibleForTesting;
import io.grpc.Internal;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
@ -28,18 +29,27 @@ import java.util.Locale;
import java.util.logging.Level;
import java.util.logging.Logger;
/** Class for checking if the system is running on Google Cloud Platform (GCP). */
final class CheckGcpEnvironment {
/**
* Class for checking if the system is running on Google Cloud Platform (GCP).
* This is intended for usage internal to the gRPC team. If you *really* think you need
* to use this, contact the gRPC team first.
*/
@Internal
public final class InternalCheckGcpEnvironment {
private static final Logger logger = Logger.getLogger(CheckGcpEnvironment.class.getName());
private static final Logger logger =
Logger.getLogger(InternalCheckGcpEnvironment.class.getName());
private static final String DMI_PRODUCT_NAME = "/sys/class/dmi/id/product_name";
private static final String WINDOWS_COMMAND = "powershell.exe";
private static Boolean cachedResult = null;
// Construct me not!
private CheckGcpEnvironment() {}
private InternalCheckGcpEnvironment() {}
static synchronized boolean isOnGcp() {
/**
* Returns {@code true} if currently running on Google Cloud Platform (GCP).
*/
public static synchronized boolean isOnGcp() {
if (cachedResult == null) {
cachedResult = isRunningOnGcp();
}

24
alts/src/test/java/io/grpc/alts/CheckGcpEnvironmentTest.java → alts/src/test/java/io/grpc/alts/InternalCheckGcpEnvironmentTest.java
View File

@ -26,37 +26,37 @@ import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public final class CheckGcpEnvironmentTest {
public final class InternalCheckGcpEnvironmentTest {
@Test
public void checkGcpLinuxPlatformData() throws Exception {
BufferedReader reader;
reader = new BufferedReader(new StringReader("HP Z440 Workstation"));
assertFalse(CheckGcpEnvironment.checkProductNameOnLinux(reader));
assertFalse(InternalCheckGcpEnvironment.checkProductNameOnLinux(reader));
reader = new BufferedReader(new StringReader("Google"));
assertTrue(CheckGcpEnvironment.checkProductNameOnLinux(reader));
assertTrue(InternalCheckGcpEnvironment.checkProductNameOnLinux(reader));
reader = new BufferedReader(new StringReader("Google Compute Engine"));
assertTrue(CheckGcpEnvironment.checkProductNameOnLinux(reader));
assertTrue(InternalCheckGcpEnvironment.checkProductNameOnLinux(reader));
reader = new BufferedReader(new StringReader("Google Compute Engine "));
assertTrue(CheckGcpEnvironment.checkProductNameOnLinux(reader));
assertTrue(InternalCheckGcpEnvironment.checkProductNameOnLinux(reader));
}
@Test
public void checkGcpWindowsPlatformData() throws Exception {
BufferedReader reader;
reader = new BufferedReader(new StringReader("Product : Google"));
assertFalse(CheckGcpEnvironment.checkBiosDataOnWindows(reader));
assertFalse(InternalCheckGcpEnvironment.checkBiosDataOnWindows(reader));
reader = new BufferedReader(new StringReader("Manufacturer : LENOVO"));
assertFalse(CheckGcpEnvironment.checkBiosDataOnWindows(reader));
assertFalse(InternalCheckGcpEnvironment.checkBiosDataOnWindows(reader));
reader = new BufferedReader(new StringReader("Manufacturer : Google Compute Engine"));
assertFalse(CheckGcpEnvironment.checkBiosDataOnWindows(reader));
assertFalse(InternalCheckGcpEnvironment.checkBiosDataOnWindows(reader));
reader = new BufferedReader(new StringReader("Manufacturer : Google"));
assertTrue(CheckGcpEnvironment.checkBiosDataOnWindows(reader));
assertTrue(InternalCheckGcpEnvironment.checkBiosDataOnWindows(reader));
reader = new BufferedReader(new StringReader("Manufacturer:Google"));
assertTrue(CheckGcpEnvironment.checkBiosDataOnWindows(reader));
assertTrue(InternalCheckGcpEnvironment.checkBiosDataOnWindows(reader));
reader = new BufferedReader(new StringReader("Manufacturer : Google "));
assertTrue(CheckGcpEnvironment.checkBiosDataOnWindows(reader));
assertTrue(InternalCheckGcpEnvironment.checkBiosDataOnWindows(reader));
reader = new BufferedReader(new StringReader("BIOSVersion : 1.0\nManufacturer : Google\n"));
assertTrue(CheckGcpEnvironment.checkBiosDataOnWindows(reader));
assertTrue(InternalCheckGcpEnvironment.checkBiosDataOnWindows(reader));
}
}

19
xds/src/main/java/io/grpc/xds/Bootstrapper.java
View File

@ -31,19 +31,26 @@ import javax.annotation.Nullable;
* Loads configuration information to bootstrap gRPC's integration of xDS protocol.
*/
@Internal
public interface Bootstrapper {
public abstract class Bootstrapper {
/**
* Returns configurations from bootstrap.
* Returns system-loaded bootstrap configuration.
*/
BootstrapInfo bootstrap() throws XdsInitializationException;
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.
*/
@Internal
class ServerInfo {
static class ServerInfo {
private final String target;
private final ChannelCredentials channelCredentials;
private final boolean useProtocolV3;
@ -73,7 +80,7 @@ public interface Bootstrapper {
* Map that represents the config for that plugin.
*/
@Internal
class CertificateProviderInfo {
public static class CertificateProviderInfo {
private final String pluginName;
private final Map<String, ?> config;
@ -95,7 +102,7 @@ public interface Bootstrapper {
* Data class containing the results of reading bootstrap.
*/
@Internal
class BootstrapInfo {
public static class BootstrapInfo {
private List<ServerInfo> servers;
private final Node node;
@Nullable private final Map<String, CertificateProviderInfo> certProviders;

92
xds/src/main/java/io/grpc/xds/BootstrapperImpl.java
View File

@ -43,7 +43,7 @@ import javax.annotation.Nullable;
* A {@link Bootstrapper} implementation that reads xDS configurations from local file system.
*/
@Internal
public class BootstrapperImpl implements Bootstrapper {
public class BootstrapperImpl extends Bootstrapper {
private static final String BOOTSTRAP_PATH_SYS_ENV_VAR = "GRPC_XDS_BOOTSTRAP";
@VisibleForTesting
@ -80,70 +80,49 @@ public class BootstrapperImpl implements Bootstrapper {
* <li>Java System Property value of "io.grpc.xds.bootstrap_value"</li>
* </ol>
*/
@SuppressWarnings("unchecked")
@Override
public BootstrapInfo bootstrap() throws XdsInitializationException {
String filePath =
bootstrapPathFromEnvVar != null ? bootstrapPathFromEnvVar : bootstrapPathFromSysProp;
String rawBootstrap;
String fileContent;
if (filePath != null) {
logger.log(XdsLogLevel.INFO, "Reading bootstrap file from {0}", filePath);
try {
rawBootstrap = reader.readFile(filePath);
fileContent = reader.readFile(filePath);
} catch (IOException e) {
throw new XdsInitializationException("Fail to read bootstrap file", e);
}
} else {
rawBootstrap = bootstrapConfigFromEnvVar != null
fileContent = bootstrapConfigFromEnvVar != null
? bootstrapConfigFromEnvVar : bootstrapConfigFromSysProp;
}
if (rawBootstrap != null) {
return parseConfig(rawBootstrap);
if (fileContent == null) {
throw new XdsInitializationException(
"Cannot find bootstrap configuration\n"
+ "Environment variables searched:\n"
+ "- " + BOOTSTRAP_PATH_SYS_ENV_VAR + "\n"
+ "- " + BOOTSTRAP_CONFIG_SYS_ENV_VAR + "\n\n"
+ "Java System Properties searched:\n"
+ "- " + BOOTSTRAP_PATH_SYS_PROPERTY + "\n"
+ "- " + BOOTSTRAP_CONFIG_SYS_PROPERTY_VAR + "\n\n");
}
throw new XdsInitializationException(
"Cannot find bootstrap configuration\n"
+ "Environment variables searched:\n"
+ "- " + BOOTSTRAP_PATH_SYS_ENV_VAR + "\n"
+ "- " + BOOTSTRAP_CONFIG_SYS_ENV_VAR + "\n\n"
+ "Java System Properties searched:\n"
+ "- " + BOOTSTRAP_PATH_SYS_PROPERTY + "\n"
+ "- " + BOOTSTRAP_CONFIG_SYS_PROPERTY_VAR + "\n\n");
}
@VisibleForTesting
void setFileReader(FileReader reader) {
this.reader = reader;
}
/**
* Reads the content of the file with the given path in the file system.
*/
interface FileReader {
String readFile(String path) throws IOException;
}
private enum LocalFileReader implements FileReader {
INSTANCE;
@Override
public String readFile(String path) throws IOException {
return new String(Files.readAllBytes(Paths.get(path)), StandardCharsets.UTF_8);
}
}
/** Parses a raw string into {@link BootstrapInfo}. */
@SuppressWarnings("unchecked")
private BootstrapInfo parseConfig(String rawData) throws XdsInitializationException {
logger.log(XdsLogLevel.INFO, "Reading bootstrap information");
logger.log(XdsLogLevel.INFO, "Reading bootstrap from " + filePath);
Map<String, ?> rawBootstrap;
try {
rawBootstrap = (Map<String, ?>) JsonParser.parse(rawData);
rawBootstrap = (Map<String, ?>) JsonParser.parse(fileContent);
} catch (IOException e) {
throw new XdsInitializationException("Failed to parse JSON", e);
}
logger.log(XdsLogLevel.DEBUG, "Bootstrap configuration:\n{0}", rawBootstrap);
return bootstrap(rawBootstrap);
}
@Override
BootstrapInfo bootstrap(Map<String, ?> rawData) throws XdsInitializationException {
List<ServerInfo> servers = new ArrayList<>();
List<?> rawServerConfigs = JsonUtil.getList(rawBootstrap, "xds_servers");
List<?> rawServerConfigs = JsonUtil.getList(rawData, "xds_servers");
if (rawServerConfigs == null) {
throw new XdsInitializationException("Invalid bootstrap: 'xds_servers' does not exist.");
}
@ -179,7 +158,7 @@ public class BootstrapperImpl implements Bootstrapper {
}
Node.Builder nodeBuilder = Node.newBuilder();
Map<String, ?> rawNode = JsonUtil.getObject(rawBootstrap, "node");
Map<String, ?> rawNode = JsonUtil.getObject(rawData, "node");
if (rawNode != null) {
String id = JsonUtil.getString(rawNode, "id");
if (id != null) {
@ -222,7 +201,7 @@ public class BootstrapperImpl implements Bootstrapper {
nodeBuilder.setUserAgentVersion(buildVersion.getImplementationVersion());
nodeBuilder.addClientFeatures(CLIENT_FEATURE_DISABLE_OVERPROVISIONING);
Map<String, ?> certProvidersBlob = JsonUtil.getObject(rawBootstrap, "certificate_providers");
Map<String, ?> certProvidersBlob = JsonUtil.getObject(rawData, "certificate_providers");
Map<String, CertificateProviderInfo> certProviders = null;
if (certProvidersBlob != null) {
certProviders = new HashMap<>(certProvidersBlob.size());
@ -236,11 +215,32 @@ public class BootstrapperImpl implements Bootstrapper {
certProviders.put(name, certificateProviderInfo);
}
}
String grpcServerResourceId = JsonUtil.getString(rawBootstrap, "grpc_server_resource_name_id");
String grpcServerResourceId = JsonUtil.getString(rawData, "grpc_server_resource_name_id");
return new BootstrapInfo(servers, nodeBuilder.build(), certProviders, grpcServerResourceId);
}
static <T> T checkForNull(T value, String fieldName) throws XdsInitializationException {
@VisibleForTesting
void setFileReader(FileReader reader) {
this.reader = reader;
}
/**
* Reads the content of the file with the given path in the file system.
*/
interface FileReader {
String readFile(String path) throws IOException;
}
private enum LocalFileReader implements FileReader {
INSTANCE;
@Override
public String readFile(String path) throws IOException {
return new String(Files.readAllBytes(Paths.get(path)), StandardCharsets.UTF_8);
}
}
private static <T> T checkForNull(T value, String fieldName) throws XdsInitializationException {
if (value == null) {
throw new XdsInitializationException(
"Invalid bootstrap: '" + fieldName + "' does not exist.");

275
xds/src/main/java/io/grpc/xds/GoogleCloudToProdNameResolver.java Normal file
View File

@ -0,0 +1,275 @@
/*
* Copyright 2021 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.checkNotNull;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Charsets;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.io.CharStreams;
import io.grpc.NameResolver;
import io.grpc.NameResolverRegistry;
import io.grpc.Status;
import io.grpc.SynchronizationContext;
import io.grpc.alts.InternalCheckGcpEnvironment;
import io.grpc.internal.GrpcUtil;
import io.grpc.internal.SharedResourceHolder;
import io.grpc.internal.SharedResourceHolder.Resource;
import io.grpc.xds.XdsNameResolverProvider.XdsClientPoolFactory;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.concurrent.Executor;
/**
* CloudToProd version of {@link NameResolver}.
*/
final class GoogleCloudToProdNameResolver extends NameResolver {
@VisibleForTesting
static final String METADATA_URL_ZONE =
"http://metadata.google.internal/computeMetadata/v1/instance/zone";
@VisibleForTesting
static final String METADATA_URL_SUPPORT_IPV6 =
"http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/0/ipv6s";
@VisibleForTesting
static boolean isOnGcp = InternalCheckGcpEnvironment.isOnGcp();
@VisibleForTesting
static boolean xdsBootstrapProvided =
System.getenv("GRPC_XDS_BOOTSTRAP") != null
|| System.getProperty("io.grpc.xds.bootstrap") != null
|| System.getenv("GRPC_XDS_BOOTSTRAP_CONFIG") != null
|| System.getProperty("io.grpc.xds.bootstrapValue") != null;
private HttpConnectionProvider httpConnectionProvider = HttpConnectionFactory.INSTANCE;
private final String authority;
private final SynchronizationContext syncContext;
private final Resource<Executor> executorResource;
private final XdsClientPoolFactory xdsClientPoolFactory;
private final NameResolver delegate;
private final boolean usingExecutorResource;
// It's not possible to use both PSM and DirectPath C2P in the same application.
// Delegate to DNS if user-provided bootstrap is found.
private final String schemeOverride = !isOnGcp || xdsBootstrapProvided ? "dns" : "xds";
private Executor executor;
private Listener2 listener;
private boolean succeeded;
private boolean resolving;
private boolean shutdown;
GoogleCloudToProdNameResolver(URI targetUri, Args args, Resource<Executor> executorResource,
XdsClientPoolFactory xdsClientPoolFactory) {
this(targetUri, args, executorResource, xdsClientPoolFactory,
NameResolverRegistry.getDefaultRegistry().asFactory());
}
@VisibleForTesting
GoogleCloudToProdNameResolver(URI targetUri, Args args, Resource<Executor> executorResource,
XdsClientPoolFactory xdsClientPoolFactory, NameResolver.Factory nameResolverFactory) {
this.executorResource = checkNotNull(executorResource, "executorResource");
this.xdsClientPoolFactory = checkNotNull(xdsClientPoolFactory, "xdsClientPoolFactory");
String targetPath = checkNotNull(checkNotNull(targetUri, "targetUri").getPath(), "targetPath");
Preconditions.checkArgument(
targetPath.startsWith("/"),
"the path component (%s) of the target (%s) must start with '/'",
targetPath,
targetUri);
authority = GrpcUtil.checkAuthority(targetPath.substring(1));
syncContext = checkNotNull(args, "args").getSynchronizationContext();
delegate = checkNotNull(nameResolverFactory, "nameResolverFactory").newNameResolver(
overrideUriScheme(targetUri, schemeOverride), args);
executor = args.getOffloadExecutor();
usingExecutorResource = executor == null;
}
@Override
public String getServiceAuthority() {
return authority;
}
@Override
public void start(final Listener2 listener) {
if (delegate == null) {
listener.onError(Status.INTERNAL.withDescription(
"Delegate resolver not found, scheme: " + schemeOverride));
return;
}
this.listener = checkNotNull(listener, "listener");
resolve();
}
private void resolve() {
if (resolving || shutdown || delegate == null) {
return;
}
resolving = true;
if (schemeOverride.equals("dns")) {
delegate.start(listener);
succeeded = true;
resolving = false;
return;
}
if (executor == null) {
executor = SharedResourceHolder.get(executorResource);
}
class Resolve implements Runnable {
@Override
public void run() {
String zone;
boolean supportIpv6;
ImmutableMap<String, ?> rawBootstrap = null;
try {
zone = queryZoneMetadata(METADATA_URL_ZONE);
supportIpv6 = queryIpv6SupportMetadata(METADATA_URL_SUPPORT_IPV6);
rawBootstrap = generateBootstrap(zone, supportIpv6);
} catch (IOException e) {
listener.onError(Status.INTERNAL.withDescription("Unable to get metadata").withCause(e));
} finally {
final ImmutableMap<String, ?> finalRawBootstrap = rawBootstrap;
syncContext.execute(new Runnable() {
@Override
public void run() {
if (!shutdown && finalRawBootstrap != null) {
xdsClientPoolFactory.setBootstrapOverride(finalRawBootstrap);
delegate.start(listener);
succeeded = true;
}
resolving = false;
}
});
}
}
}
executor.execute(new Resolve());
}
private static ImmutableMap<String, ?> generateBootstrap(String zone, boolean supportIpv6) {
ImmutableMap.Builder<String, Object> nodeBuilder = ImmutableMap.builder();
nodeBuilder.put("id", "C2P");
if (!zone.isEmpty()) {
nodeBuilder.put("locality", ImmutableMap.of("zone", zone));
}
if (supportIpv6) {
nodeBuilder.put("metadata",
ImmutableMap.of("TRAFFICDIRECTOR_DIRECTPATH_C2P_IPV6_CAPABLE", true));
}
ImmutableMap.Builder<String, Object> serverBuilder = ImmutableMap.builder();
serverBuilder.put("server_uri", "directpath-trafficdirector.googleapis.com");
serverBuilder.put("channel_creds",
ImmutableList.of(ImmutableMap.of("type", "google_default")));
return ImmutableMap.of(
"node", nodeBuilder.build(),
"xds_servers", ImmutableList.of(serverBuilder.build()));
}
@Override
public void refresh() {
if (succeeded) {
delegate.refresh();
} else if (!resolving) {
resolve();
}
}
@Override
public void shutdown() {
if (shutdown) {
return;
}
shutdown = true;
if (delegate != null) {
delegate.shutdown();
}
if (executor != null && usingExecutorResource) {
executor = SharedResourceHolder.release(executorResource, executor);
}
}
private String queryZoneMetadata(String url) throws IOException {
HttpURLConnection con = null;
String respBody;
try {
con = httpConnectionProvider.createConnection(url);
if (con.getResponseCode() != 200) {
return "";
}
try (Reader reader = new InputStreamReader(con.getInputStream(), Charsets.UTF_8)) {
respBody = CharStreams.toString(reader);
}
} finally {
if (con != null) {
con.disconnect();
}
}
int index = respBody.lastIndexOf('/');
return index == -1 ? "" : respBody.substring(index + 1);
}
private boolean queryIpv6SupportMetadata(String url) throws IOException {
HttpURLConnection con = null;
try {
con = httpConnectionProvider.createConnection(url);
return con.getResponseCode() == 200;
} finally {
if (con != null) {
con.disconnect();
}
}
}
@VisibleForTesting
void setHttpConnectionProvider(HttpConnectionProvider httpConnectionProvider) {
this.httpConnectionProvider = httpConnectionProvider;
}
private static URI overrideUriScheme(URI uri, String scheme) {
URI res;
try {
res = new URI(scheme, uri.getAuthority(), uri.getPath(), uri.getQuery(), uri.getFragment());
} catch (URISyntaxException ex) {
throw new IllegalArgumentException("Invalid scheme: " + scheme, ex);
}
return res;
}
private enum HttpConnectionFactory implements HttpConnectionProvider {
INSTANCE;
@Override
public HttpURLConnection createConnection(String url) throws IOException {
HttpURLConnection con = (HttpURLConnection) new URL(url).openConnection();
con.setRequestMethod("GET");
con.setReadTimeout(10000);
con.setRequestProperty("Metadata-Flavor", "Google");
return con;
}
}
@VisibleForTesting
interface HttpConnectionProvider {
HttpURLConnection createConnection(String url) throws IOException;
}
}

58
xds/src/main/java/io/grpc/xds/GoogleCloudToProdNameResolverProvider.java Normal file
View File

@ -0,0 +1,58 @@
/*
* Copyright 2021 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 io.grpc.Internal;
import io.grpc.NameResolver;
import io.grpc.NameResolver.Args;
import io.grpc.NameResolverProvider;
import io.grpc.internal.GrpcUtil;
import java.net.URI;
/**
* A provider for {@link GoogleCloudToProdNameResolver}.
*/
@Internal
public final class GoogleCloudToProdNameResolverProvider extends NameResolverProvider {
private static final String SCHEME = "google-c2p";
@Override
public NameResolver newNameResolver(URI targetUri, Args args) {
if (SCHEME.equals(targetUri.getScheme())) {
return new GoogleCloudToProdNameResolver(
targetUri, args, GrpcUtil.SHARED_CHANNEL_EXECUTOR,
SharedXdsClientPoolProvider.getDefaultProvider());
}
return null;
}
@Override
public String getDefaultScheme() {
return SCHEME;
}
@Override
protected boolean isAvailable() {
return true;
}
@Override
protected int priority() {
return 4;
}
}

16
xds/src/main/java/io/grpc/xds/SharedXdsClientPoolProvider.java
View File

@ -30,8 +30,10 @@ import io.grpc.xds.Bootstrapper.BootstrapInfo;
import io.grpc.xds.Bootstrapper.ServerInfo;
import io.grpc.xds.EnvoyProtoData.Node;
import io.grpc.xds.XdsNameResolverProvider.XdsClientPoolFactory;
import java.util.Map;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import javax.annotation.Nullable;
import javax.annotation.concurrent.GuardedBy;
import javax.annotation.concurrent.ThreadSafe;
@ -45,6 +47,7 @@ final class SharedXdsClientPoolProvider implements XdsClientPoolFactory {
private final Bootstrapper bootstrapper;
private final Object lock = new Object();
private final AtomicReference<Map<String, ?>> bootstrapOverride = new AtomicReference<>();
private volatile ObjectPool<XdsClient> xdsClientPool;
private SharedXdsClientPoolProvider() {
@ -60,6 +63,11 @@ final class SharedXdsClientPoolProvider implements XdsClientPoolFactory {
return SharedXdsClientPoolProviderHolder.instance;
}
@Override
public void setBootstrapOverride(Map<String, ?> bootstrap) {
bootstrapOverride.set(bootstrap);
}
@Override
public ObjectPool<XdsClient> getXdsClientPool() throws XdsInitializationException {
ObjectPool<XdsClient> ref = xdsClientPool;
@ -67,7 +75,13 @@ final class SharedXdsClientPoolProvider implements XdsClientPoolFactory {
synchronized (lock) {
ref = xdsClientPool;
if (ref == null) {
BootstrapInfo bootstrapInfo = bootstrapper.bootstrap();
BootstrapInfo bootstrapInfo;
Map<String, ?> rawBootstrap = bootstrapOverride.get();
if (rawBootstrap != null) {
bootstrapInfo = bootstrapper.bootstrap(rawBootstrap);
} else {
bootstrapInfo = bootstrapper.bootstrap();
}
if (bootstrapInfo.getServers().isEmpty()) {
throw new XdsInitializationException("No xDS server provided");
}

3
xds/src/main/java/io/grpc/xds/XdsNameResolverProvider.java
View File

@ -24,6 +24,7 @@ import io.grpc.NameResolver.Args;
import io.grpc.NameResolverProvider;
import io.grpc.internal.ObjectPool;
import java.net.URI;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;
import javax.annotation.Nullable;
@ -76,6 +77,8 @@ public final class XdsNameResolverProvider extends NameResolverProvider {
}
interface XdsClientPoolFactory {
void setBootstrapOverride(Map<String, ?> bootstrap);
ObjectPool<XdsClient> getXdsClientPool() throws XdsInitializationException;
}

1
xds/src/main/resources/META-INF/services/io.grpc.NameResolverProvider
View File

@ -1 +1,2 @@
io.grpc.xds.XdsNameResolverProvider
io.grpc.xds.GoogleCloudToProdNameResolverProvider

65
xds/src/test/java/io/grpc/xds/GoogleCloudToProdNameResolverProviderTest.java Normal file
View File

@ -0,0 +1,65 @@
/*
* Copyright 2021 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.truth.Truth.assertThat;
import static org.mockito.Mockito.mock;
import io.grpc.ChannelLogger;
import io.grpc.NameResolver;
import io.grpc.NameResolver.ServiceConfigParser;
import io.grpc.NameResolverRegistry;
import io.grpc.SynchronizationContext;
import io.grpc.internal.FakeClock;
import io.grpc.internal.GrpcUtil;
import java.net.URI;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Unit tests for {@link GoogleCloudToProdNameResolverProvider}.
*/
@RunWith(JUnit4.class)
public class GoogleCloudToProdNameResolverProviderTest {
private final SynchronizationContext syncContext = new SynchronizationContext(
new Thread.UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread t, Throwable e) {
throw new AssertionError(e);
}
});
private final FakeClock fakeClock = new FakeClock();
private final NameResolver.Args args = NameResolver.Args.newBuilder()
.setDefaultPort(8080)
.setProxyDetector(GrpcUtil.NOOP_PROXY_DETECTOR)
.setSynchronizationContext(syncContext)
.setServiceConfigParser(mock(ServiceConfigParser.class))
.setScheduledExecutorService(fakeClock.getScheduledExecutorService())
.setChannelLogger(mock(ChannelLogger.class))
.build();
private final NameResolverRegistry nsRegistry = NameResolverRegistry.getDefaultRegistry();
@Test
public void provided() {
NameResolver resolver = nsRegistry.asFactory().newNameResolver(
URI.create("google-c2p:///foo.googleapis.com"), args);
assertThat(resolver).isInstanceOf(GoogleCloudToProdNameResolver.class);
}
}

256
xds/src/test/java/io/grpc/xds/GoogleCloudToProdNameResolverTest.java Normal file
View File

@ -0,0 +1,256 @@
/*
* Copyright 2021 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.truth.Truth.assertThat;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;
import io.grpc.ChannelLogger;
import io.grpc.NameResolver;
import io.grpc.NameResolver.Args;
import io.grpc.NameResolver.ServiceConfigParser;
import io.grpc.NameResolverProvider;
import io.grpc.NameResolverRegistry;
import io.grpc.Status;
import io.grpc.Status.Code;
import io.grpc.SynchronizationContext;
import io.grpc.internal.FakeClock;
import io.grpc.internal.GrpcUtil;
import io.grpc.internal.ObjectPool;
import io.grpc.internal.SharedResourceHolder.Resource;
import io.grpc.xds.GoogleCloudToProdNameResolver.HttpConnectionProvider;
import io.grpc.xds.XdsNameResolverProvider.XdsClientPoolFactory;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Executor;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.ArgumentCaptor;
import org.mockito.Captor;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnit;
import org.mockito.junit.MockitoRule;
@RunWith(JUnit4.class)
public class GoogleCloudToProdNameResolverTest {
@Rule
public final MockitoRule mocks = MockitoJUnit.rule();
private static final URI TARGET_URI = URI.create("google-c2p:///googleapis.com");
private static final String ZONE = "us-central1-a";
private static final int DEFAULT_PORT = 887;
private final SynchronizationContext syncContext = new SynchronizationContext(
new Thread.UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread t, Throwable e) {
throw new AssertionError(e);
}
});
private final NameResolver.Args args = NameResolver.Args.newBuilder()
.setDefaultPort(DEFAULT_PORT)
.setProxyDetector(GrpcUtil.DEFAULT_PROXY_DETECTOR)
.setSynchronizationContext(syncContext)
.setServiceConfigParser(mock(ServiceConfigParser.class))
.setChannelLogger(mock(ChannelLogger.class))
.build();
private final FakeClock fakeExecutor = new FakeClock();
private final FakeXdsClientPoolFactory fakeXdsClientPoolFactory = new FakeXdsClientPoolFactory();
private final Resource<Executor> fakeExecutorResource = new Resource<Executor>() {
@Override
public Executor create() {
return fakeExecutor.getScheduledExecutorService();
}
@Override
public void close(Executor instance) {}
};
private final NameResolverRegistry nsRegistry = new NameResolverRegistry();
private final Map<String, NameResolver> delegatedResolver = new HashMap<>();
@Mock
private NameResolver.Listener2 mockListener;
@Captor
private ArgumentCaptor<Status> errorCaptor;
private boolean originalIsOnGcp;
private boolean originalXdsBootstrapProvided;
private GoogleCloudToProdNameResolver resolver;
@Before
public void setUp() {
nsRegistry.register(new FakeNsProvider("dns"));
nsRegistry.register(new FakeNsProvider("xds"));
originalIsOnGcp = GoogleCloudToProdNameResolver.isOnGcp;
originalXdsBootstrapProvided = GoogleCloudToProdNameResolver.xdsBootstrapProvided;
}
@After
public void tearDown() {
GoogleCloudToProdNameResolver.isOnGcp = originalIsOnGcp;
GoogleCloudToProdNameResolver.xdsBootstrapProvided = originalXdsBootstrapProvided;
resolver.shutdown();
verify(Iterables.getOnlyElement(delegatedResolver.values())).shutdown();
}
private void createResolver() {
HttpConnectionProvider httpConnections = new HttpConnectionProvider() {
@Override
public HttpURLConnection createConnection(String url) throws IOException {
HttpURLConnection con = mock(HttpURLConnection.class);
when(con.getResponseCode()).thenReturn(200);
if (url.equals(GoogleCloudToProdNameResolver.METADATA_URL_ZONE)) {
when(con.getInputStream()).thenReturn(
new ByteArrayInputStream(("/" + ZONE).getBytes(StandardCharsets.UTF_8)));
return con;
} else if (url.equals(GoogleCloudToProdNameResolver.METADATA_URL_SUPPORT_IPV6)) {
return con;
}
throw new AssertionError("Unknown http query");
}
};
resolver = new GoogleCloudToProdNameResolver(
TARGET_URI, args, fakeExecutorResource, fakeXdsClientPoolFactory, nsRegistry.asFactory());
resolver.setHttpConnectionProvider(httpConnections);
}
@Test
public void notOnGcpDelegateToDns() {
GoogleCloudToProdNameResolver.isOnGcp = false;
createResolver();
resolver.start(mockListener);
assertThat(delegatedResolver.keySet()).containsExactly("dns");
verify(Iterables.getOnlyElement(delegatedResolver.values())).start(mockListener);
}
@Test
public void hasProvidedBootstrapDelegateToDns() {
GoogleCloudToProdNameResolver.isOnGcp = true;
GoogleCloudToProdNameResolver.xdsBootstrapProvided = true;
createResolver();
resolver.start(mockListener);
assertThat(delegatedResolver.keySet()).containsExactly("dns");
verify(Iterables.getOnlyElement(delegatedResolver.values())).start(mockListener);
}
@SuppressWarnings("unchecked")
@Test
public void onGcpAndNoProvidedBootstrapDelegateToXds() {
GoogleCloudToProdNameResolver.isOnGcp = true;
GoogleCloudToProdNameResolver.xdsBootstrapProvided = false;
createResolver();
resolver.start(mockListener);
fakeExecutor.runDueTasks();
assertThat(delegatedResolver.keySet()).containsExactly("xds");
verify(Iterables.getOnlyElement(delegatedResolver.values())).start(mockListener);
Map<String, ?> bootstrap = fakeXdsClientPoolFactory.bootstrapRef.get();
Map<String, ?> node = (Map<String, ?>) bootstrap.get("node");
assertThat(node).containsExactly(
"id", "C2P", "locality", ImmutableMap.of("zone", ZONE),
"metadata", ImmutableMap.of("TRAFFICDIRECTOR_DIRECTPATH_C2P_IPV6_CAPABLE", true));
Map<String, ?> server = Iterables.getOnlyElement(
(List<Map<String, ?>>) bootstrap.get("xds_servers"));
assertThat(server).containsExactly(
"server_uri", "directpath-trafficdirector.googleapis.com",
"channel_creds", ImmutableList.of(ImmutableMap.of("type", "google_default")));
}
@Test
public void failToQueryMetadata() {
GoogleCloudToProdNameResolver.isOnGcp = true;
GoogleCloudToProdNameResolver.xdsBootstrapProvided = false;
createResolver();
HttpConnectionProvider httpConnections = new HttpConnectionProvider() {
@Override
public HttpURLConnection createConnection(String url) throws IOException {
HttpURLConnection con = mock(HttpURLConnection.class);
when(con.getResponseCode()).thenThrow(new IOException("unknown error"));
return con;
}
};
resolver.setHttpConnectionProvider(httpConnections);
resolver.start(mockListener);
fakeExecutor.runDueTasks();
verify(mockListener).onError(errorCaptor.capture());
assertThat(errorCaptor.getValue().getCode()).isEqualTo(Code.INTERNAL);
assertThat(errorCaptor.getValue().getDescription()).isEqualTo("Unable to get metadata");
}
private final class FakeNsProvider extends NameResolverProvider {
private final String scheme;
private FakeNsProvider(String scheme) {
this.scheme = scheme;
}
@Override
public NameResolver newNameResolver(URI targetUri, Args args) {
if (scheme.equals(targetUri.getScheme())) {
NameResolver resolver = mock(NameResolver.class);
delegatedResolver.put(scheme, resolver);
return resolver;
}
return null;
}
@Override
protected boolean isAvailable() {
return true;
}
@Override
protected int priority() {
return 5;
}
@Override
public String getDefaultScheme() {
return scheme;
}
}
private static final class FakeXdsClientPoolFactory implements XdsClientPoolFactory {
private final AtomicReference<Map<String, ?>> bootstrapRef = new AtomicReference<>();
@Override
public void setBootstrapOverride(Map<String, ?> bootstrap) {
bootstrapRef.set(bootstrap);
}
@Override
public ObjectPool<XdsClient> getXdsClientPool() {
throw new UnsupportedOperationException("Should not be called");
}
}
}

10
xds/src/test/java/io/grpc/xds/XdsNameResolverTest.java
View File

@ -159,6 +159,11 @@ public class XdsNameResolverTest {
@Test
public void resolving_failToCreateXdsClientPool() {
XdsClientPoolFactory xdsClientPoolFactory = new XdsClientPoolFactory() {
@Override
public void setBootstrapOverride(Map<String, ?> bootstrap) {
throw new UnsupportedOperationException("Should not be called");
}
@Override
public ObjectPool<XdsClient> getXdsClientPool() throws XdsInitializationException {
throw new XdsInitializationException("Fail to read bootstrap file");
@ -1394,6 +1399,11 @@ public class XdsNameResolverTest {
private final class FakeXdsClientPoolFactory implements XdsClientPoolFactory {
@Override
public void setBootstrapOverride(Map<String, ?> bootstrap) {
throw new UnsupportedOperationException("Should not be called");
}
@Override
public ObjectPool<XdsClient> getXdsClientPool() throws XdsInitializationException {
return new ObjectPool<XdsClient>() {