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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.core.rpc;
import com.yahoo.jrt.DataValue;
import com.yahoo.jrt.Int32Value;
import com.yahoo.jrt.Int8Value;
import com.yahoo.jrt.Request;
import com.yahoo.jrt.Spec;
import com.yahoo.jrt.StringValue;
import com.yahoo.jrt.Supervisor;
import com.yahoo.jrt.Target;
import com.yahoo.jrt.Transport;
import com.yahoo.jrt.Values;
import com.yahoo.vdslib.state.ClusterState;
import com.yahoo.vdslib.state.NodeState;
import com.yahoo.vdslib.state.State;
import com.yahoo.vespa.clustercontroller.core.ActivateClusterStateVersionRequest;
import com.yahoo.vespa.clustercontroller.core.ClusterStateBundle;
import com.yahoo.vespa.clustercontroller.core.Communicator;
import com.yahoo.vespa.clustercontroller.core.FleetControllerOptions;
import com.yahoo.vespa.clustercontroller.core.GetNodeStateRequest;
import com.yahoo.vespa.clustercontroller.core.NodeInfo;
import com.yahoo.vespa.clustercontroller.core.SetClusterStateRequest;
import com.yahoo.vespa.clustercontroller.core.Timer;
import java.time.Duration;
import java.util.logging.Level;
import java.util.logging.Logger;
import static com.google.common.base.Preconditions.checkArgument;
/**
* Responsible for doing RPC requests to storage nodes.
* This class is not thread-safe.
*/
public class RPCCommunicator implements Communicator {
public static final Logger log = Logger.getLogger(RPCCommunicator.class.getName());
// Rpc method versions and Vespa versions which supports each version:
// 0 - 4.1
// 1 - 4.2-5.0.10
// 2 - 5.0.11-8.48.3
// 3 - 6.220+
// 4 - 7.24+
public static final int ACTIVATE_CLUSTER_STATE_VERSION_RPC_VERSION = 4;
public static final String ACTIVATE_CLUSTER_STATE_VERSION_RPC_METHOD_NAME = "activate_cluster_state_version";
public static final int SET_DISTRIBUTION_STATES_RPC_VERSION = 3;
public static final String SET_DISTRIBUTION_STATES_RPC_METHOD_NAME = "setdistributionstates";
private final Timer timer;
private final Supervisor supervisor;
private Duration nodeStateRequestTimeoutIntervalMax;
private int nodeStateRequestTimeoutIntervalStartPercentage;
private int nodeStateRequestTimeoutIntervalStopPercentage;
private Duration nodeStateRequestRoundTripTimeMax;
private final int fleetControllerIndex;
public static Supervisor createRealSupervisor() {
return new Supervisor(new Transport("rpc-communicator")).setDropEmptyBuffers(true);
}
public RPCCommunicator(Supervisor supervisor,
Timer t,
int index,
int nodeStateRequestTimeoutIntervalMaxMs,
int nodeStateRequestTimeoutIntervalStartPercentage,
int nodeStateRequestTimeoutIntervalStopPercentage,
int nodeStateRequestRoundTripTimeMaxSeconds) {
this.timer = t;
this.fleetControllerIndex = index;
checkArgument(nodeStateRequestTimeoutIntervalMaxMs > 0);
checkArgument(nodeStateRequestTimeoutIntervalStartPercentage >= 0);
checkArgument(nodeStateRequestTimeoutIntervalStartPercentage <= 100);
checkArgument(nodeStateRequestTimeoutIntervalStopPercentage >= nodeStateRequestTimeoutIntervalStartPercentage);
checkArgument(nodeStateRequestTimeoutIntervalStopPercentage <= 100);
checkArgument(nodeStateRequestRoundTripTimeMaxSeconds >= 0);
this.nodeStateRequestTimeoutIntervalMax = Duration.ofMillis(nodeStateRequestTimeoutIntervalMaxMs);
this.nodeStateRequestTimeoutIntervalStartPercentage = nodeStateRequestTimeoutIntervalStartPercentage;
this.nodeStateRequestTimeoutIntervalStopPercentage = nodeStateRequestTimeoutIntervalStopPercentage;
this.nodeStateRequestRoundTripTimeMax = Duration.ofSeconds(nodeStateRequestRoundTripTimeMaxSeconds);
this.supervisor = supervisor;
}
public void shutdown() {
supervisor.transport().shutdown().join();
}
public Target getConnection(final NodeInfo node) {
Target t = node.getConnection();
if (t == null || !t.isValid()) {
t = node.setConnection(supervisor.connect(new Spec(node.getRpcAddress())));
}
return t;
}
@Override
public void propagateOptions(FleetControllerOptions options) {
checkArgument(options.nodeStateRequestTimeoutMS() > 0);
checkArgument(options.nodeStateRequestTimeoutEarliestPercentage() >= 0);
checkArgument(options.nodeStateRequestTimeoutEarliestPercentage() <= 100);
checkArgument(options.nodeStateRequestTimeoutLatestPercentage() >= options.nodeStateRequestTimeoutEarliestPercentage());
checkArgument(options.nodeStateRequestTimeoutLatestPercentage() <= 100);
checkArgument(options.nodeStateRequestRoundTripTimeMaxSeconds() >= 0);
this.nodeStateRequestTimeoutIntervalMax = Duration.ofMillis(options.nodeStateRequestTimeoutMS());
this.nodeStateRequestTimeoutIntervalStartPercentage = options.nodeStateRequestTimeoutEarliestPercentage();
this.nodeStateRequestTimeoutIntervalStopPercentage = options.nodeStateRequestTimeoutLatestPercentage();
this.nodeStateRequestRoundTripTimeMax = Duration.ofSeconds(options.nodeStateRequestRoundTripTimeMaxSeconds());
}
@Override
public void getNodeState(NodeInfo node, Waiter<GetNodeStateRequest> externalWaiter) {
Target connection = getConnection(node);
if ( ! connection.isValid()) {
log.log(Level.FINE, () -> String.format("Connection to '%s' could not be created.", node.getRpcAddress()));
}
NodeState currentState = node.getReportedState();
Request req = new Request("getnodestate3");
req.parameters().add(new StringValue(
currentState.getState().equals(State.DOWN) || node.getConnectionAttemptCount() > 0
? "unknown" : currentState.serialize()));
req.parameters().add(new Int32Value((int)generateNodeStateRequestTimeout().toMillis()));
req.parameters().add(new Int32Value(fleetControllerIndex));
RPCGetNodeStateRequest stateRequest = new RPCGetNodeStateRequest(node, req);
RPCGetNodeStateWaiter waiter = new RPCGetNodeStateWaiter(stateRequest, externalWaiter);
Duration requestTimeout = nodeStateRequestTimeoutIntervalMax.plus(nodeStateRequestRoundTripTimeMax);
connection.invokeAsync(req, requestTimeout, waiter);
node.setCurrentNodeStateRequest(stateRequest, timer.getCurrentTimeInMillis());
node.lastRequestInfoConnection = connection;
}
@Override
public void setSystemState(ClusterStateBundle stateBundle, NodeInfo node, Waiter<SetClusterStateRequest> externalWaiter) {
RPCSetClusterStateWaiter waiter = new RPCSetClusterStateWaiter(externalWaiter);
ClusterState baselineState = stateBundle.getBaselineClusterState();
Target connection = getConnection(node);
if ( ! connection.isValid()) {
log.log(Level.FINE, () -> String.format("Connection to '%s' could not be created.", node.getRpcAddress()));
return;
}
Request req = new Request(SET_DISTRIBUTION_STATES_RPC_METHOD_NAME);
SlimeClusterStateBundleCodec codec = new SlimeClusterStateBundleCodec();
EncodedClusterStateBundle encodedBundle = codec.encode(stateBundle);
Values v = req.parameters();
v.add(new Int8Value(encodedBundle.getCompression().type().getCode()));
v.add(new Int32Value(encodedBundle.getCompression().uncompressedSize()));
v.add(new DataValue(encodedBundle.getCompression().data()));
log.log(Level.FINE, () -> String.format("Sending '%s' RPC to %s for state version %d",
req.methodName(), node.getRpcAddress(), stateBundle.getVersion()));
RPCSetClusterStateRequest stateRequest = new RPCSetClusterStateRequest(node, req, baselineState.getVersion());
waiter.setRequest(stateRequest);
connection.invokeAsync(req, Duration.ofSeconds(60), waiter);
node.setClusterStateVersionBundleSent(stateBundle);
}
@Override
public void activateClusterStateVersion(int clusterStateVersion, NodeInfo node, Waiter<ActivateClusterStateVersionRequest> externalWaiter) {
var waiter = new RPCActivateClusterStateVersionWaiter(externalWaiter);
Target connection = getConnection(node);
if ( ! connection.isValid()) {
log.log(Level.FINE, () -> String.format("Connection to '%s' could not be created.", node.getRpcAddress()));
return;
}
var req = new Request(ACTIVATE_CLUSTER_STATE_VERSION_RPC_METHOD_NAME);
req.parameters().add(new Int32Value(clusterStateVersion));
log.log(Level.FINE, () -> String.format("Sending '%s' RPC to %s for state version %d",
req.methodName(), node.getRpcAddress(), clusterStateVersion));
var activationRequest = new RPCActivateClusterStateVersionRequest(node, req, clusterStateVersion);
waiter.setRequest(activationRequest);
connection.invokeAsync(req, Duration.ofSeconds(60), waiter);
node.setClusterStateVersionActivationSent(clusterStateVersion);
}
// protected for testing.
protected Duration generateNodeStateRequestTimeout() {
double intervalFraction = Math.random();
long earliestTimeoutNanos =
nodeStateRequestTimeoutIntervalMax.toNanos() * nodeStateRequestTimeoutIntervalStartPercentage / 100;
long latestTimeoutNanos =
nodeStateRequestTimeoutIntervalMax.toNanos() * nodeStateRequestTimeoutIntervalStopPercentage / 100;
long interval = latestTimeoutNanos - earliestTimeoutNanos;
long timeoutNanos = earliestTimeoutNanos + (long)(intervalFraction * interval);
return Duration.ofNanos(timeoutNanos);
}
}
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