Examples with PriorityChildConfig io.grpc.xds.PriorityLoadBalancerProvider.PriorityLbConfig.PriorityChildConfig used on opensource projects

Example 11 with PriorityChildConfig

use of io.grpc.xds.PriorityLoadBalancerProvider.PriorityLbConfig.PriorityChildConfig in project grpc-java by grpc.

the class ClusterResolverLoadBalancerTest method onlyLogicalDnsCluster_endpointsResolved.

@Test
public void onlyLogicalDnsCluster_endpointsResolved() {
    ClusterResolverConfig config = new ClusterResolverConfig(Collections.singletonList(logicalDnsDiscoveryMechanism), roundRobin);
    deliverLbConfig(config);
    FakeNameResolver resolver = assertResolverCreated("/" + DNS_HOST_NAME);
    assertThat(childBalancers).isEmpty();
    EquivalentAddressGroup endpoint1 = makeAddress("endpoint-addr-1");
    EquivalentAddressGroup endpoint2 = makeAddress("endpoint-addr-2");
    resolver.deliverEndpointAddresses(Arrays.asList(endpoint1, endpoint2));
    assertThat(childBalancers).hasSize(1);
    FakeLoadBalancer childBalancer = Iterables.getOnlyElement(childBalancers);
    assertThat(childBalancer.name).isEqualTo(PRIORITY_POLICY_NAME);
    PriorityLbConfig priorityLbConfig = (PriorityLbConfig) childBalancer.config;
    String priority = Iterables.getOnlyElement(priorityLbConfig.priorities);
    PriorityChildConfig priorityChildConfig = priorityLbConfig.childConfigs.get(priority);
    assertThat(priorityChildConfig.ignoreReresolution).isFalse();
    assertThat(priorityChildConfig.policySelection.getProvider().getPolicyName()).isEqualTo(CLUSTER_IMPL_POLICY_NAME);
    ClusterImplConfig clusterImplConfig = (ClusterImplConfig) priorityChildConfig.policySelection.getConfig();
    assertClusterImplConfig(clusterImplConfig, CLUSTER_DNS, null, LRS_SERVER_INFO, 300L, null, Collections.<DropOverload>emptyList(), "pick_first");
    assertAddressesEqual(Arrays.asList(endpoint1, endpoint2), childBalancer.addresses);
}

Example 12 with PriorityChildConfig

use of io.grpc.xds.PriorityLoadBalancerProvider.PriorityLbConfig.PriorityChildConfig in project grpc-java by grpc.

the class ClusterResolverLoadBalancer method generateEdsBasedPriorityChildConfigs.

/**
 * Generates configs to be used in the priority LB policy for priorities in an EDS cluster.
 *
 * <p>priority LB -> cluster_impl LB (one per priority) -> (weighted_target LB
 * -> round_robin / least_request_experimental (one per locality)) / ring_hash_experimental
 */
private static Map<String, PriorityChildConfig> generateEdsBasedPriorityChildConfigs(String cluster, @Nullable String edsServiceName, @Nullable ServerInfo lrsServerInfo, @Nullable Long maxConcurrentRequests, @Nullable UpstreamTlsContext tlsContext, PolicySelection endpointLbPolicy, LoadBalancerRegistry lbRegistry, Map<String, Map<Locality, Integer>> prioritizedLocalityWeights, List<DropOverload> dropOverloads) {
    Map<String, PriorityChildConfig> configs = new HashMap<>();
    for (String priority : prioritizedLocalityWeights.keySet()) {
        PolicySelection leafPolicy = endpointLbPolicy;
        // product of each endpoint's weight and the weight of the locality it belongs to.
        if (endpointLbPolicy.getProvider().getPolicyName().equals("round_robin") || endpointLbPolicy.getProvider().getPolicyName().equals("least_request_experimental")) {
            Map<Locality, Integer> localityWeights = prioritizedLocalityWeights.get(priority);
            Map<String, WeightedPolicySelection> targets = new HashMap<>();
            for (Locality locality : localityWeights.keySet()) {
                int weight = localityWeights.get(locality);
                WeightedPolicySelection target = new WeightedPolicySelection(weight, endpointLbPolicy);
                targets.put(localityName(locality), target);
            }
            LoadBalancerProvider weightedTargetLbProvider = lbRegistry.getProvider(WEIGHTED_TARGET_POLICY_NAME);
            WeightedTargetConfig weightedTargetConfig = new WeightedTargetConfig(Collections.unmodifiableMap(targets));
            leafPolicy = new PolicySelection(weightedTargetLbProvider, weightedTargetConfig);
        }
        ClusterImplConfig clusterImplConfig = new ClusterImplConfig(cluster, edsServiceName, lrsServerInfo, maxConcurrentRequests, dropOverloads, leafPolicy, tlsContext);
        LoadBalancerProvider clusterImplLbProvider = lbRegistry.getProvider(XdsLbPolicies.CLUSTER_IMPL_POLICY_NAME);
        PolicySelection clusterImplPolicy = new PolicySelection(clusterImplLbProvider, clusterImplConfig);
        PriorityChildConfig priorityChildConfig = new PriorityChildConfig(clusterImplPolicy, true);
        configs.put(priority, priorityChildConfig);
    }
    return configs;
}

Example 13 with PriorityChildConfig

use of io.grpc.xds.PriorityLoadBalancerProvider.PriorityLbConfig.PriorityChildConfig in project grpc-java by grpc.

the class ClusterResolverLoadBalancer method generateDnsBasedPriorityChildConfig.

/**
 * Generates the config to be used in the priority LB policy for the single priority of
 * logical DNS cluster.
 *
 * <p>priority LB -> cluster_impl LB (single hardcoded priority) -> pick_first
 */
private static PriorityChildConfig generateDnsBasedPriorityChildConfig(String cluster, @Nullable ServerInfo lrsServerInfo, @Nullable Long maxConcurrentRequests, @Nullable UpstreamTlsContext tlsContext, LoadBalancerRegistry lbRegistry, List<DropOverload> dropOverloads) {
    // Override endpoint-level LB policy with pick_first for logical DNS cluster.
    PolicySelection endpointLbPolicy = new PolicySelection(lbRegistry.getProvider("pick_first"), null);
    ClusterImplConfig clusterImplConfig = new ClusterImplConfig(cluster, null, lrsServerInfo, maxConcurrentRequests, dropOverloads, endpointLbPolicy, tlsContext);
    LoadBalancerProvider clusterImplLbProvider = lbRegistry.getProvider(XdsLbPolicies.CLUSTER_IMPL_POLICY_NAME);
    PolicySelection clusterImplPolicy = new PolicySelection(clusterImplLbProvider, clusterImplConfig);
    return new PriorityChildConfig(clusterImplPolicy, false);
}

Example 14 with PriorityChildConfig

use of io.grpc.xds.PriorityLoadBalancerProvider.PriorityLbConfig.PriorityChildConfig in project grpc-java by grpc.

the class PriorityLoadBalancerTest method readyToConnectDoesNotFailOverButUpdatesPicker.

@Test
public void readyToConnectDoesNotFailOverButUpdatesPicker() {
    PriorityChildConfig priorityChildConfig0 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityChildConfig priorityChildConfig1 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityLbConfig priorityLbConfig = new PriorityLbConfig(ImmutableMap.of("p0", priorityChildConfig0, "p1", priorityChildConfig1), ImmutableList.of("p0", "p1"));
    priorityLb.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(ImmutableList.<EquivalentAddressGroup>of()).setLoadBalancingPolicyConfig(priorityLbConfig).build());
    assertThat(fooBalancers).hasSize(1);
    assertThat(fooHelpers).hasSize(1);
    Helper helper0 = Iterables.getOnlyElement(fooHelpers);
    // p0 gets READY.
    final Subchannel subchannel0 = mock(Subchannel.class);
    helper0.updateBalancingState(READY, new SubchannelPicker() {

        @Override
        public PickResult pickSubchannel(PickSubchannelArgs args) {
            return PickResult.withSubchannel(subchannel0);
        }
    });
    assertCurrentPickerPicksSubchannel(subchannel0);
    // p0 goes to CONNECTING
    helper0.updateBalancingState(IDLE, BUFFER_PICKER);
    assertCurrentPickerIsBufferPicker();
    // no failover happened
    assertThat(fooBalancers).hasSize(1);
    assertThat(fooHelpers).hasSize(1);
    // resolution update without priority change does not trigger failover
    Attributes.Key<String> fooKey = Attributes.Key.create("fooKey");
    priorityLb.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(ImmutableList.<EquivalentAddressGroup>of()).setLoadBalancingPolicyConfig(priorityLbConfig).setAttributes(Attributes.newBuilder().set(fooKey, "barVal").build()).build());
    assertCurrentPickerIsBufferPicker();
    // no failover happened
    assertThat(fooBalancers).hasSize(1);
    assertThat(fooHelpers).hasSize(1);
}

Example 15 with PriorityChildConfig

use of io.grpc.xds.PriorityLoadBalancerProvider.PriorityLbConfig.PriorityChildConfig in project grpc-java by grpc.

the class PriorityLoadBalancerProviderTest method priorityLbConfig_missingChildConfig.

@SuppressWarnings("ExpectedExceptionChecker")
@Test
public void priorityLbConfig_missingChildConfig() {
    Map<String, PriorityChildConfig> childConfigs = ImmutableMap.of("p1", new PriorityChildConfig(new PolicySelection(mock(LoadBalancerProvider.class), null), true));
    List<String> priorities = ImmutableList.of("p0", "p1");
    thrown.expect(IllegalArgumentException.class);
    new PriorityLbConfig(childConfigs, priorities);
}