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Move to a synchronous, pooled connection model for Redis clusters.

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This commit is contained in:
Jon Chambers
2020-08-14 12:19:27 -04:00
committed by Jon Chambers
parent 27f721a1f5
commit 6fb9038af1
6 changed files with 95 additions and 58 deletions
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34
service/src/main/java/org/whispersystems/textsecuregcm/metrics/PushLatencyManager.java
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@@ -3,13 +3,15 @@ package org.whispersystems.textsecuregcm.metrics;
import com.codahale.metrics.MetricRegistry;
import com.google.common.annotations.VisibleForTesting;
import io.lettuce.core.SetArgs;
import io.lettuce.core.cluster.api.async.RedisAdvancedClusterAsyncCommands;
import io.lettuce.core.cluster.api.sync.RedisAdvancedClusterCommands;
import io.micrometer.core.instrument.Metrics;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.whispersystems.textsecuregcm.redis.FaultTolerantRedisCluster;
import java.time.Duration;
import java.util.Optional;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
/**
@@ -27,6 +29,8 @@ public class PushLatencyManager {
private final FaultTolerantRedisCluster redisCluster;
private static final Logger log = LoggerFactory.getLogger(PushLatencyManager.class);
public PushLatencyManager(final FaultTolerantRedisCluster redisCluster) {
this.redisCluster = redisCluster;
}
@@ -37,29 +41,33 @@ public class PushLatencyManager {
@VisibleForTesting
void recordPushSent(final UUID accountUuid, final long deviceId, final long currentTime) {
redisCluster.useCluster(connection ->
connection.async().set(getFirstUnacknowledgedPushKey(accountUuid, deviceId), String.valueOf(currentTime), SetArgs.Builder.nx().ex(TTL)));
try {
redisCluster.useCluster(connection ->
connection.sync().set(getFirstUnacknowledgedPushKey(accountUuid, deviceId), String.valueOf(currentTime), SetArgs.Builder.nx().ex(TTL)));
} catch (final Exception e) {
log.warn("Failed to record \"push notification sent\" timestamp", e);
}
}
public void recordQueueRead(final UUID accountUuid, final long deviceId, final String userAgent) {
getLatencyAndClearTimestamp(accountUuid, deviceId, System.currentTimeMillis()).thenAccept(latency -> {
if (latency != null) {
Metrics.timer(TIMER_NAME, UserAgentTagUtil.getUserAgentTags(userAgent)).record(latency, TimeUnit.MILLISECONDS);
}
});
final Optional<Long> maybeLatency = getLatencyAndClearTimestamp(accountUuid, deviceId, System.currentTimeMillis());
if (maybeLatency.isPresent()) {
Metrics.timer(TIMER_NAME, UserAgentTagUtil.getUserAgentTags(userAgent)).record(maybeLatency.get(), TimeUnit.MILLISECONDS);
}
}
@VisibleForTesting
CompletableFuture<Long> getLatencyAndClearTimestamp(final UUID accountUuid, final long deviceId, final long currentTimeMillis) {
Optional<Long> getLatencyAndClearTimestamp(final UUID accountUuid, final long deviceId, final long currentTimeMillis) {
final String key = getFirstUnacknowledgedPushKey(accountUuid, deviceId);
return redisCluster.withCluster(connection -> {
final RedisAdvancedClusterAsyncCommands<String, String> commands = connection.async();
final RedisAdvancedClusterCommands<String, String> commands = connection.sync();
final CompletableFuture<String> getFuture = commands.get(key).toCompletableFuture();
final String timestampString = commands.get(key);
commands.del(key);
return getFuture.thenApply(timestampString -> timestampString != null ? currentTimeMillis - Long.parseLong(timestampString, 10) : null);
return timestampString != null ? Optional.of(currentTimeMillis - Long.parseLong(timestampString, 10)) : Optional.empty();
});
}

8
service/src/main/java/org/whispersystems/textsecuregcm/providers/RedisClusterHealthCheck.java
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@@ -14,10 +14,8 @@ public class RedisClusterHealthCheck extends HealthCheck {
}
@Override
protected Result check() throws Exception {
return CompletableFuture.allOf(redisCluster.withCluster(connection -> connection.async().masters().commands().ping()).futures())
.thenApply(v -> Result.healthy())
.exceptionally(Result::unhealthy)
.get();
protected Result check() {
redisCluster.withCluster(connection -> connection.sync().masters().commands().ping());
return Result.healthy();
}
}

2
service/src/main/java/org/whispersystems/textsecuregcm/push/ClientPresenceManager.java
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@@ -196,7 +196,7 @@ public class ClientPresenceManager extends RedisClusterPubSubAdapter<String, Str
}
private void unsubscribeFromRemotePresenceChanges(final String presenceKey) {
pubSubConnection.usePubSubConnection(connection -> connection.async().masters().commands().unsubscribe(getKeyspaceNotificationChannel(presenceKey)));
pubSubConnection.usePubSubConnection(connection -> connection.sync().masters().commands().unsubscribe(getKeyspaceNotificationChannel(presenceKey)));
}
void pruneMissingPeers() {

75
service/src/main/java/org/whispersystems/textsecuregcm/redis/FaultTolerantRedisCluster.java
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@@ -8,6 +8,11 @@ import io.lettuce.core.cluster.RedisClusterClient;
import io.lettuce.core.cluster.api.StatefulRedisClusterConnection;
import io.lettuce.core.cluster.pubsub.StatefulRedisClusterPubSubConnection;
import io.lettuce.core.codec.ByteArrayCodec;
import io.lettuce.core.support.ConnectionPoolSupport;
import org.apache.commons.pool2.impl.GenericObjectPool;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.whispersystems.textsecuregcm.configuration.CircuitBreakerConfiguration;
import org.whispersystems.textsecuregcm.util.CircuitBreakerUtil;
import org.whispersystems.textsecuregcm.util.Constants;
@@ -20,9 +25,8 @@ import java.util.function.Function;
import java.util.stream.Collectors;
/**
* A fault-tolerant access manager for a Redis cluster. A fault-tolerant Redis cluster has separate circuit breakers for
* read and write operations because the leader in a Redis cluster shard may fail while its read-only replicas can still
* serve traffic.
* A fault-tolerant access manager for a Redis cluster. A fault-tolerant Redis cluster provides managed,
* circuit-breaker-protected access to a pool of connections.
*/
public class FaultTolerantRedisCluster {
@@ -30,14 +34,16 @@ public class FaultTolerantRedisCluster {
private final RedisClusterClient clusterClient;
private final StatefulRedisClusterConnection<String, String> stringClusterConnection;
private final StatefulRedisClusterConnection<byte[], byte[]> binaryClusterConnection;
private final GenericObjectPool<StatefulRedisClusterConnection<String, String>> stringConnectionPool;
private final GenericObjectPool<StatefulRedisClusterConnection<byte[], byte[]>> binaryConnectionPool;
private final List<StatefulRedisClusterPubSubConnection<?, ?>> pubSubConnections = new ArrayList<>();
private final CircuitBreakerConfiguration circuitBreakerConfiguration;
private final CircuitBreaker circuitBreaker;
private static final Logger log = LoggerFactory.getLogger(FaultTolerantRedisCluster.class);
public FaultTolerantRedisCluster(final String name, final List<String> urls, final Duration timeout, final CircuitBreakerConfiguration circuitBreakerConfiguration) {
this(name, RedisClusterClient.create(urls.stream().map(RedisURI::create).collect(Collectors.toList())), timeout, circuitBreakerConfiguration);
}
@@ -49,8 +55,11 @@ public class FaultTolerantRedisCluster {
this.clusterClient = clusterClient;
this.clusterClient.setDefaultTimeout(timeout);
this.stringClusterConnection = clusterClient.connect();
this.binaryClusterConnection = clusterClient.connect(ByteArrayCodec.INSTANCE);
//noinspection unchecked,rawtypes,rawtypes
this.stringConnectionPool = ConnectionPoolSupport.createGenericObjectPool(clusterClient::connect, new GenericObjectPoolConfig());
//noinspection unchecked,rawtypes,rawtypes
this.binaryConnectionPool = ConnectionPoolSupport.createGenericObjectPool(() -> clusterClient.connect(ByteArrayCodec.INSTANCE), new GenericObjectPoolConfig());
this.circuitBreakerConfiguration = circuitBreakerConfiguration;
this.circuitBreaker = CircuitBreaker.of(name + "-read", circuitBreakerConfiguration.toCircuitBreakerConfig());
@@ -61,8 +70,8 @@ public class FaultTolerantRedisCluster {
}
void shutdown() {
stringClusterConnection.close();
binaryClusterConnection.close();
stringConnectionPool.close();
binaryConnectionPool.close();
for (final StatefulRedisClusterPubSubConnection<?, ?> pubSubConnection : pubSubConnections) {
pubSubConnection.close();
@@ -72,19 +81,55 @@ public class FaultTolerantRedisCluster {
}
public void useCluster(final Consumer<StatefulRedisClusterConnection<String, String>> consumer) {
this.circuitBreaker.executeRunnable(() -> consumer.accept(stringClusterConnection));
acceptPooledConnection(stringConnectionPool, consumer);
}
public <T> T withCluster(final Function<StatefulRedisClusterConnection<String, String>, T> consumer) {
return this.circuitBreaker.executeSupplier(() -> consumer.apply(stringClusterConnection));
public <T> T withCluster(final Function<StatefulRedisClusterConnection<String, String>, T> function) {
return applyToPooledConnection(stringConnectionPool, function);
}
public void useBinaryCluster(final Consumer<StatefulRedisClusterConnection<byte[], byte[]>> consumer) {
this.circuitBreaker.executeRunnable(() -> consumer.accept(binaryClusterConnection));
acceptPooledConnection(binaryConnectionPool, consumer);
}
public <T> T withBinaryCluster(final Function<StatefulRedisClusterConnection<byte[], byte[]>, T> consumer) {
return this.circuitBreaker.executeSupplier(() -> consumer.apply(binaryClusterConnection));
public <T> T withBinaryCluster(final Function<StatefulRedisClusterConnection<byte[], byte[]>, T> function) {
return applyToPooledConnection(binaryConnectionPool, function);
}
private <K, V> void acceptPooledConnection(final GenericObjectPool<StatefulRedisClusterConnection<K, V>> pool, final Consumer<StatefulRedisClusterConnection<K, V>> consumer) {
try {
circuitBreaker.executeCheckedRunnable(() -> {
try (final StatefulRedisClusterConnection<K, V> connection = pool.borrowObject()) {
consumer.accept(connection);
}
});
} catch (final Throwable t) {
log.warn("Redis operation failure", t);
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
} else {
throw new RuntimeException(t);
}
}
}
private <T, K, V> T applyToPooledConnection(final GenericObjectPool<StatefulRedisClusterConnection<K, V>> pool, final Function<StatefulRedisClusterConnection<K, V>, T> function) {
try {
return circuitBreaker.executeCheckedSupplier(() -> {
try (final StatefulRedisClusterConnection<K, V> connection = pool.borrowObject()) {
return function.apply(connection);
}
});
} catch (final Throwable t) {
log.warn("Redis operation failure", t);
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
} else {
throw new RuntimeException(t);
}
}
}
public FaultTolerantPubSubConnection<String, String> createPubSubConnection() {