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xds: append a random number to C2P generated node id (#8239) 

Adding a random number to the xDS stream node id helps debugging for distinguishing between different clients.
This commit is contained in:
Chengyuan Zhang 2021-06-07 11:01:04 -07:00 committed by GitHub
parent 4209c8d8cc
commit e51a17574f
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 16 additions and 6 deletions
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12
xds/src/main/java/io/grpc/xds/GoogleCloudToProdNameResolver.java
View File

@ -40,6 +40,7 @@ import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Random;
import java.util.concurrent.Executor;
/**
@ -71,6 +72,7 @@ final class GoogleCloudToProdNameResolver extends NameResolver {
private final Resource<Executor> executorResource;
private final XdsClientPoolFactory xdsClientPoolFactory;
private final NameResolver delegate;
private final Random rand;
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.
@ -83,15 +85,17 @@ final class GoogleCloudToProdNameResolver extends NameResolver {
GoogleCloudToProdNameResolver(URI targetUri, Args args, Resource<Executor> executorResource,
XdsClientPoolFactory xdsClientPoolFactory) {
this(targetUri, args, executorResource, xdsClientPoolFactory,
this(targetUri, args, executorResource, new Random(), xdsClientPoolFactory,
NameResolverRegistry.getDefaultRegistry().asFactory());
}
@VisibleForTesting
GoogleCloudToProdNameResolver(URI targetUri, Args args, Resource<Executor> executorResource,
XdsClientPoolFactory xdsClientPoolFactory, NameResolver.Factory nameResolverFactory) {
Random rand, XdsClientPoolFactory xdsClientPoolFactory,
NameResolver.Factory nameResolverFactory) {
this.executorResource = checkNotNull(executorResource, "executorResource");
this.xdsClientPoolFactory = checkNotNull(xdsClientPoolFactory, "xdsClientPoolFactory");
this.rand = checkNotNull(rand, "rand");
String targetPath = checkNotNull(checkNotNull(targetUri, "targetUri").getPath(), "targetPath");
Preconditions.checkArgument(
targetPath.startsWith("/"),
@ -169,9 +173,9 @@ final class GoogleCloudToProdNameResolver extends NameResolver {
executor.execute(new Resolve());
}
private static ImmutableMap<String, ?> generateBootstrap(String zone, boolean supportIpv6) {
private ImmutableMap<String, ?> generateBootstrap(String zone, boolean supportIpv6) {
ImmutableMap.Builder<String, Object> nodeBuilder = ImmutableMap.builder();
nodeBuilder.put("id", "C2P");
nodeBuilder.put("id", "C2P-" + rand.nextInt());
if (!zone.isEmpty()) {
nodeBuilder.put("locality", ImmutableMap.of("zone", zone));
}

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

@ -47,6 +47,7 @@ import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.Executor;
import java.util.concurrent.atomic.AtomicReference;
import javax.annotation.Nullable;
@ -103,6 +104,8 @@ public class GoogleCloudToProdNameResolverTest {
@Mock
private NameResolver.Listener2 mockListener;
@Mock
private Random mockRandom;
@Captor
private ArgumentCaptor<Status> errorCaptor;
private boolean originalIsOnGcp;
@ -111,6 +114,7 @@ public class GoogleCloudToProdNameResolverTest {
@Before
public void setUp() {
when(mockRandom.nextInt()).thenReturn(123456789);
nsRegistry.register(new FakeNsProvider("dns"));
nsRegistry.register(new FakeNsProvider("xds"));
originalIsOnGcp = GoogleCloudToProdNameResolver.isOnGcp;
@ -142,7 +146,8 @@ public class GoogleCloudToProdNameResolverTest {
}
};
resolver = new GoogleCloudToProdNameResolver(
TARGET_URI, args, fakeExecutorResource, fakeXdsClientPoolFactory, nsRegistry.asFactory());
TARGET_URI, args, fakeExecutorResource, mockRandom, fakeXdsClientPoolFactory,
nsRegistry.asFactory());
resolver.setHttpConnectionProvider(httpConnections);
}
@ -178,7 +183,8 @@ public class GoogleCloudToProdNameResolverTest {
Map<String, ?> bootstrap = fakeXdsClientPoolFactory.bootstrapRef.get();
Map<String, ?> node = (Map<String, ?>) bootstrap.get("node");
assertThat(node).containsExactly(
"id", "C2P", "locality", ImmutableMap.of("zone", ZONE),
"id", "C2P-123456789",
"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"));