Examples with RingHashConfig io.grpc.xds.RingHashLoadBalancer.RingHashConfig used on opensource projects

Example 11 with RingHashConfig

use of io.grpc.xds.RingHashLoadBalancer.RingHashConfig in project grpc-java by grpc.

the class RingHashLoadBalancerTest method subchannelLazyConnectUntilPicked.

@Test
public void subchannelLazyConnectUntilPicked() {
    RingHashConfig config = new RingHashConfig(10, 100);
    // one server
    List<EquivalentAddressGroup> servers = createWeightedServerAddrs(1);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    verify(helper).createSubchannel(any(CreateSubchannelArgs.class));
    Subchannel subchannel = Iterables.getOnlyElement(subchannels.values());
    verify(subchannel, never()).requestConnection();
    verify(helper).updateBalancingState(eq(IDLE), pickerCaptor.capture());
    // Picking subchannel triggers connection.
    PickSubchannelArgs args = new PickSubchannelArgsImpl(TestMethodDescriptors.voidMethod(), new Metadata(), CallOptions.DEFAULT.withOption(XdsNameResolver.RPC_HASH_KEY, hashFunc.hashVoid()));
    PickResult result = pickerCaptor.getValue().pickSubchannel(args);
    assertThat(result.getStatus().isOk()).isTrue();
    assertThat(result.getSubchannel()).isNull();
    verify(subchannel).requestConnection();
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(CONNECTING));
    verify(helper).updateBalancingState(eq(CONNECTING), any(SubchannelPicker.class));
    // Subchannel becomes ready, triggers pick again.
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(READY));
    verify(helper).updateBalancingState(eq(READY), pickerCaptor.capture());
    result = pickerCaptor.getValue().pickSubchannel(args);
    assertThat(result.getSubchannel()).isSameInstanceAs(subchannel);
    verifyNoMoreInteractions(helper);
}

Example 12 with RingHashConfig

use of io.grpc.xds.RingHashLoadBalancer.RingHashConfig in project grpc-java by grpc.

the class RingHashLoadBalancerTest method aggregateSubchannelStates_connectingReadyIdleFailure.

@Test
public void aggregateSubchannelStates_connectingReadyIdleFailure() {
    RingHashConfig config = new RingHashConfig(10, 100);
    List<EquivalentAddressGroup> servers = createWeightedServerAddrs(1, 1);
    InOrder inOrder = Mockito.inOrder(helper);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    inOrder.verify(helper, times(2)).createSubchannel(any(CreateSubchannelArgs.class));
    inOrder.verify(helper).updateBalancingState(eq(IDLE), any(SubchannelPicker.class));
    // one in CONNECTING, one in IDLE
    deliverSubchannelState(subchannels.get(Collections.singletonList(servers.get(0))), ConnectivityStateInfo.forNonError(CONNECTING));
    inOrder.verify(helper).updateBalancingState(eq(CONNECTING), any(SubchannelPicker.class));
    // two in CONNECTING
    deliverSubchannelState(subchannels.get(Collections.singletonList(servers.get(1))), ConnectivityStateInfo.forNonError(CONNECTING));
    inOrder.verify(helper).updateBalancingState(eq(CONNECTING), any(SubchannelPicker.class));
    // one in CONNECTING, one in READY
    deliverSubchannelState(subchannels.get(Collections.singletonList(servers.get(1))), ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(helper).updateBalancingState(eq(READY), any(SubchannelPicker.class));
    // one in TRANSIENT_FAILURE, one in READY
    deliverSubchannelState(subchannels.get(Collections.singletonList(servers.get(0))), ConnectivityStateInfo.forTransientFailure(Status.UNKNOWN.withDescription("unknown failure")));
    inOrder.verify(helper).refreshNameResolution();
    inOrder.verify(helper).updateBalancingState(eq(READY), any(SubchannelPicker.class));
    // one in TRANSIENT_FAILURE, one in IDLE
    deliverSubchannelState(subchannels.get(Collections.singletonList(servers.get(1))), ConnectivityStateInfo.forNonError(IDLE));
    inOrder.verify(helper).refreshNameResolution();
    inOrder.verify(helper).updateBalancingState(eq(IDLE), any(SubchannelPicker.class));
    verifyNoMoreInteractions(helper);
}

Example 13 with RingHashConfig

use of io.grpc.xds.RingHashLoadBalancer.RingHashConfig in project grpc-java by grpc.

the class RingHashLoadBalancerTest method deterministicPickWithHostsPartiallyRemoved.

@Test
public void deterministicPickWithHostsPartiallyRemoved() {
    RingHashConfig config = new RingHashConfig(10, 100);
    List<EquivalentAddressGroup> servers = createWeightedServerAddrs(1, 1, 1, 1, 1);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    InOrder inOrder = Mockito.inOrder(helper);
    inOrder.verify(helper, times(5)).createSubchannel(any(CreateSubchannelArgs.class));
    inOrder.verify(helper).updateBalancingState(eq(IDLE), any(SubchannelPicker.class));
    // Bring all subchannels to READY so that next pick always succeeds.
    for (Subchannel subchannel : subchannels.values()) {
        deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(READY));
        inOrder.verify(helper).updateBalancingState(eq(READY), pickerCaptor.capture());
    }
    // Simulate rpc hash hits one ring entry exactly for server1.
    long rpcHash = hashFunc.hashAsciiString("[FakeSocketAddress-server1]_0");
    PickSubchannelArgs args = new PickSubchannelArgsImpl(TestMethodDescriptors.voidMethod(), new Metadata(), CallOptions.DEFAULT.withOption(XdsNameResolver.RPC_HASH_KEY, rpcHash));
    pickerCaptor.getValue().pickSubchannel(args);
    PickResult result = pickerCaptor.getValue().pickSubchannel(args);
    Subchannel subchannel = result.getSubchannel();
    assertThat(subchannel.getAddresses()).isEqualTo(servers.get(1));
    List<EquivalentAddressGroup> updatedServers = new ArrayList<>();
    for (EquivalentAddressGroup addr : servers.subList(0, 2)) {
        // only server0 and server1 left
        Attributes attr = addr.getAttributes().toBuilder().set(CUSTOM_KEY, "custom value").build();
        updatedServers.add(new EquivalentAddressGroup(addr.getAddresses(), attr));
    }
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(updatedServers).setLoadBalancingPolicyConfig(config).build());
    verify(subchannels.get(Collections.singletonList(servers.get(0)))).updateAddresses(Collections.singletonList(updatedServers.get(0)));
    verify(subchannels.get(Collections.singletonList(servers.get(1)))).updateAddresses(Collections.singletonList(updatedServers.get(1)));
    inOrder.verify(helper).updateBalancingState(eq(READY), pickerCaptor.capture());
    assertThat(pickerCaptor.getValue().pickSubchannel(args).getSubchannel()).isSameInstanceAs(subchannel);
    verifyNoMoreInteractions(helper);
}

Example 14 with RingHashConfig

use of io.grpc.xds.RingHashLoadBalancer.RingHashConfig in project grpc-java by grpc.

the class RingHashLoadBalancerTest method nameResolutionErrorWithActiveSubchannels.

@Test
public void nameResolutionErrorWithActiveSubchannels() {
    RingHashConfig config = new RingHashConfig(10, 100);
    List<EquivalentAddressGroup> servers = createWeightedServerAddrs(1);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    verify(helper).createSubchannel(any(CreateSubchannelArgs.class));
    verify(helper).updateBalancingState(eq(IDLE), pickerCaptor.capture());
    // Picking subchannel triggers subchannel creation and connection.
    PickSubchannelArgs args = new PickSubchannelArgsImpl(TestMethodDescriptors.voidMethod(), new Metadata(), CallOptions.DEFAULT.withOption(XdsNameResolver.RPC_HASH_KEY, hashFunc.hashVoid()));
    pickerCaptor.getValue().pickSubchannel(args);
    deliverSubchannelState(Iterables.getOnlyElement(subchannels.values()), ConnectivityStateInfo.forNonError(READY));
    verify(helper).updateBalancingState(eq(READY), any(SubchannelPicker.class));
    loadBalancer.handleNameResolutionError(Status.NOT_FOUND.withDescription("target not found"));
    verifyNoMoreInteractions(helper);
}

Example 15 with RingHashConfig

use of io.grpc.xds.RingHashLoadBalancer.RingHashConfig in project grpc-java by grpc.

the class RingHashLoadBalancerTest method hostSelectionProportionalToWeights.

@Test
public void hostSelectionProportionalToWeights() {
    // large ring
    RingHashConfig config = new RingHashConfig(10000, 100000);
    // 1:10:100
    List<EquivalentAddressGroup> servers = createWeightedServerAddrs(1, 10, 100);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    verify(helper, times(3)).createSubchannel(any(CreateSubchannelArgs.class));
    verify(helper).updateBalancingState(eq(IDLE), any(SubchannelPicker.class));
    // Bring all subchannels to READY.
    Map<EquivalentAddressGroup, Integer> pickCounts = new HashMap<>();
    for (Subchannel subchannel : subchannels.values()) {
        deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(READY));
        pickCounts.put(subchannel.getAddresses(), 0);
    }
    verify(helper, times(3)).updateBalancingState(eq(READY), pickerCaptor.capture());
    SubchannelPicker picker = pickerCaptor.getValue();
    for (int i = 0; i < 10000; i++) {
        long hash = hashFunc.hashInt(i);
        PickSubchannelArgs args = new PickSubchannelArgsImpl(TestMethodDescriptors.voidMethod(), new Metadata(), CallOptions.DEFAULT.withOption(XdsNameResolver.RPC_HASH_KEY, hash));
        Subchannel pickedSubchannel = picker.pickSubchannel(args).getSubchannel();
        EquivalentAddressGroup addr = pickedSubchannel.getAddresses();
        pickCounts.put(addr, pickCounts.get(addr) + 1);
    }
    // Actual distribution: server0 = 104, server1 = 808, server2 = 9088
    double ratio01 = (double) pickCounts.get(servers.get(0)) / pickCounts.get(servers.get(1));
    double ratio12 = (double) pickCounts.get(servers.get(1)) / pickCounts.get(servers.get(2));
    assertThat(ratio01).isWithin(0.03).of((double) 1 / 10);
    assertThat(ratio12).isWithin(0.03).of((double) 10 / 100);
}