Update createComponents to supply AllocationService instead of AllocationDeciders (#92785)

modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/CommonAnalysisPlugin.java

@@ -102,7 +102,7 @@ import org.apache.lucene.util.SetOnce;
 import org.elasticsearch.Version;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.logging.DeprecationCategory;
@@ -166,7 +166,7 @@ public class CommonAnalysisPlugin extends Plugin implements AnalysisPlugin, Scri
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         this.scriptServiceHolder.set(scriptService);
         return Collections.emptyList();

modules/apm/src/main/java/org/elasticsearch/tracing/apm/APM.java

@@ -11,7 +11,7 @@ package org.elasticsearch.tracing.apm;
 import org.apache.lucene.util.SetOnce;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Setting;
@@ -81,7 +81,7 @@ public class APM extends Plugin implements NetworkPlugin, TracerPlugin {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer unused,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         final APMTracer apmTracer = tracer.get();
 

modules/data-streams/src/main/java/org/elasticsearch/datastreams/DataStreamsPlugin.java

@@ -20,7 +20,7 @@ import org.elasticsearch.action.datastreams.PromoteDataStreamAction;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -117,7 +117,7 @@ public class DataStreamsPlugin extends Plugin implements ActionPlugin {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         var service = new UpdateTimeSeriesRangeService(environment.settings(), threadPool, clusterService);
         this.service.set(service);

modules/ingest-geoip/src/main/java/org/elasticsearch/ingest/geoip/IngestGeoIpPlugin.java

@@ -16,7 +16,7 @@ import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexMetadata;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -116,7 +116,7 @@ public class IngestGeoIpPlugin extends Plugin implements IngestPlugin, SystemInd
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         try {
             String nodeId = nodeEnvironment.nodeId();

modules/lang-painless/src/main/java/org/elasticsearch/painless/PainlessPlugin.java

@@ -14,7 +14,7 @@ import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -147,7 +147,7 @@ public final class PainlessPlugin extends Plugin implements ScriptPlugin, Extens
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         // this is a hack to bind the painless script engine in guice (all components are added to guice), so that
         // the painless context api. this is a temporary measure until transport actions do no require guice

modules/reindex/src/main/java/org/elasticsearch/reindex/ReindexPlugin.java

@@ -13,7 +13,7 @@ import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -100,7 +100,7 @@ public class ReindexPlugin extends Plugin implements ActionPlugin {
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         return Collections.singletonList(new ReindexSslConfig(environment.settings(), environment, resourceWatcherService));
     }

modules/reindex/src/test/java/org/elasticsearch/reindex/ReindexFromRemoteWithAuthTests.java

@@ -21,7 +21,7 @@ import org.elasticsearch.action.support.ActionFilterChain;
 import org.elasticsearch.action.support.WriteRequest.RefreshPolicy;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.bytes.BytesArray;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -170,7 +170,7 @@ public class ReindexFromRemoteWithAuthTests extends ESSingleNodeTestCase {
             IndexNameExpressionResolver expressionResolver,
             Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             testFilter.set(new ReindexFromRemoteWithAuthTests.TestFilter(threadPool));
             return Collections.emptyList();

modules/repository-azure/src/main/java/org/elasticsearch/repositories/azure/AzureRepositoryPlugin.java

@@ -13,7 +13,7 @@ import com.azure.core.util.serializer.JacksonAdapter;
 import org.apache.lucene.util.SetOnce;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Setting;
@@ -97,7 +97,7 @@ public class AzureRepositoryPlugin extends Plugin implements RepositoryPlugin, R
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         AzureClientProvider azureClientProvider = AzureClientProvider.create(threadPool, settings);
         azureStoreService.set(createAzureStorageService(settings, azureClientProvider));

modules/repository-s3/src/main/java/org/elasticsearch/repositories/s3/S3RepositoryPlugin.java

@@ -15,7 +15,7 @@ import org.elasticsearch.SpecialPermission;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.RepositoryMetadata;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Setting;
@@ -102,7 +102,7 @@ public class S3RepositoryPlugin extends Plugin implements RepositoryPlugin, Relo
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         service.set(s3Service(environment));
         this.service.get().refreshAndClearCache(S3ClientSettings.load(settings));

modules/repository-url/src/main/java/org/elasticsearch/plugin/repository/url/URLRepositoryPlugin.java

@@ -11,7 +11,7 @@ package org.elasticsearch.plugin.repository.url;
 import org.apache.lucene.util.SetOnce;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.blobstore.url.http.URLHttpClient;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -88,7 +88,7 @@ public class URLRepositoryPlugin extends Plugin implements RepositoryPlugin {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
 
         final URLHttpClient.Factory apacheURLHttpClientFactory = new URLHttpClient.Factory();

modules/runtime-fields-common/src/main/java/org/elasticsearch/runtimefields/RuntimeFieldsCommonPlugin.java

@@ -10,7 +10,7 @@ package org.elasticsearch.runtimefields;
 
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Setting;
@@ -76,7 +76,7 @@ public final class RuntimeFieldsCommonPlugin extends Plugin {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         grokHelper.finishInitializing(threadPool);
         return List.of();

modules/systemd/src/main/java/org/elasticsearch/systemd/SystemdPlugin.java

@@ -14,7 +14,7 @@ import org.apache.lucene.util.SetOnce;
 import org.elasticsearch.Build;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.core.TimeValue;
@@ -91,7 +91,7 @@ public class SystemdPlugin extends Plugin implements ClusterPlugin {
         final IndexNameExpressionResolver expressionResolver,
         final Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         if (enabled == false) {
             extender.set(null);

server/src/internalClusterTest/java/org/elasticsearch/action/ingest/AsyncIngestProcessorIT.java

@@ -14,7 +14,7 @@ import org.elasticsearch.action.get.GetResponse;
 import org.elasticsearch.action.index.IndexRequest;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.bytes.BytesArray;
 import org.elasticsearch.common.bytes.BytesReference;
@@ -99,7 +99,7 @@ public class AsyncIngestProcessorIT extends ESSingleNodeTestCase {
             IndexNameExpressionResolver expressionResolver,
             Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             this.threadPool = threadPool;
             return List.of();

server/src/internalClusterTest/java/org/elasticsearch/cluster/SimpleClusterStateIT.java

@@ -19,7 +19,7 @@ import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.MappingMetadata;
 import org.elasticsearch.cluster.metadata.Metadata;
 import org.elasticsearch.cluster.routing.RoutingTable;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.Priority;
 import org.elasticsearch.common.Strings;
@@ -445,7 +445,7 @@ public class SimpleClusterStateIT extends ESIntegTestCase {
             final IndexNameExpressionResolver expressionResolver,
             final Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             clusterService.addListener(event -> {
                 final ClusterState state = event.state();

server/src/internalClusterTest/java/org/elasticsearch/cluster/metadata/TemplateUpgradeServiceIT.java

@@ -11,7 +11,7 @@ package org.elasticsearch.cluster.metadata;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.elasticsearch.client.internal.Client;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Setting;
@@ -77,7 +77,7 @@ public class TemplateUpgradeServiceIT extends ESIntegTestCase {
             IndexNameExpressionResolver expressionResolver,
             Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             clusterService.getClusterSettings()
                 .addSettingsUpdateConsumer(
@@ -97,7 +97,7 @@ public class TemplateUpgradeServiceIT extends ESIntegTestCase {
                 expressionResolver,
                 repositoriesServiceSupplier,
                 tracer,
-                allocationDeciders
+                allocationService
             );
         }
 

server/src/internalClusterTest/java/org/elasticsearch/health/GetHealthActionIT.java

@@ -12,7 +12,7 @@ import org.elasticsearch.ResourceNotFoundException;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.ClusterName;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.metrics.Counters;
@@ -107,7 +107,7 @@ public class GetHealthActionIT extends ESIntegTestCase {
             IndexNameExpressionResolver indexNameExpressionResolver,
             Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             healthIndicatorServices.add(new IlmHealthIndicatorService(clusterService));
             healthIndicatorServices.add(new SlmHealthIndicatorService(clusterService));

server/src/internalClusterTest/java/org/elasticsearch/health/HealthServiceIT.java

@@ -12,7 +12,7 @@ import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Settings;
@@ -136,7 +136,7 @@ public class HealthServiceIT extends ESIntegTestCase {
             IndexNameExpressionResolver indexNameExpressionResolver,
             Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             healthIndicatorServices.add(new TestHealthIndicatorService());
             return new ArrayList<>(healthIndicatorServices);

server/src/internalClusterTest/java/org/elasticsearch/index/FinalPipelineIT.java

@@ -20,7 +20,7 @@ import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.action.support.WriteRequest;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.bytes.BytesArray;
 import org.elasticsearch.common.bytes.BytesReference;
@@ -350,7 +350,7 @@ public class FinalPipelineIT extends ESIntegTestCase {
             final IndexNameExpressionResolver expressionResolver,
             final Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             return List.of();
         }

server/src/internalClusterTest/java/org/elasticsearch/index/SettingsListenerIT.java

@@ -9,7 +9,7 @@ package org.elasticsearch.index;
 
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.inject.AbstractModule;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -75,7 +75,7 @@ public class SettingsListenerIT extends ESIntegTestCase {
             IndexNameExpressionResolver expressionResolver,
             Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             return Collections.singletonList(service);
         }

server/src/main/java/org/elasticsearch/node/Node.java

@@ -731,7 +731,7 @@ public class Node implements Closeable {
                     clusterModule.getIndexNameExpressionResolver(),
                     repositoriesServiceReference::get,
                     tracer,
-                    clusterModule.getAllocationService().getAllocationDeciders()
+                    clusterModule.getAllocationService()
                 )
             ).toList();
 

server/src/main/java/org/elasticsearch/plugins/Plugin.java

@@ -12,7 +12,7 @@ import org.elasticsearch.bootstrap.BootstrapCheck;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.IndexTemplateMetadata;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.component.LifecycleComponent;
 import org.elasticsearch.common.io.stream.NamedWriteable;
@@ -82,6 +82,7 @@ public abstract class Plugin implements Closeable {
      * @param repositoriesServiceSupplier A supplier for the service that manages snapshot repositories; will return null when this method
      *                                    is called, but will return the repositories service once the node is initialized.
      * @param tracer                      An interface for distributed tracing
+     * @param allocationService           A service to manage shard allocation in the cluster
      */
     public Collection<Object> createComponents(
         Client client,
@@ -96,7 +97,7 @@ public abstract class Plugin implements Closeable {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         return Collections.emptyList();
     }

server/src/test/java/org/elasticsearch/plugins/PluginIntrospectorTests.java

@@ -13,7 +13,7 @@ import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.SingleNodeShutdownMetadata;
 import org.elasticsearch.cluster.node.DiscoveryNode;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.breaker.CircuitBreaker;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -272,7 +272,7 @@ public class PluginIntrospectorTests extends ESTestCase {
                 IndexNameExpressionResolver indexNameExpressionResolver,
                 Supplier<RepositoriesService> repositoriesServiceSupplier,
                 Tracer tracer,
-                AllocationDeciders allocationDeciders
+                AllocationService allocationService
             ) {
                 return null;
             }

test/framework/src/main/java/org/elasticsearch/test/MockIndexEventListener.java

@@ -10,7 +10,7 @@ package org.elasticsearch.test;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.routing.ShardRouting;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Setting;
@@ -88,7 +88,7 @@ public final class MockIndexEventListener {
             IndexNameExpressionResolver expressionResolver,
             Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             return Collections.singletonList(listener);
         }

x-pack/plugin/analytics/src/main/java/org/elasticsearch/xpack/analytics/AnalyticsPlugin.java

@@ -10,7 +10,7 @@ import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Setting;
@@ -190,7 +190,7 @@ public class AnalyticsPlugin extends Plugin implements SearchPlugin, ActionPlugi
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         return List.of(usage);
     }

x-pack/plugin/async/src/main/java/org/elasticsearch/xpack/async/AsyncResultsIndexPlugin.java

@@ -11,7 +11,7 @@ import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.client.internal.OriginSettingClient;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNode;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Settings;
@@ -73,7 +73,7 @@ public class AsyncResultsIndexPlugin extends Plugin implements SystemIndexPlugin
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         List<Object> components = new ArrayList<>();
         if (DiscoveryNode.canContainData(environment.settings())) {

x-pack/plugin/autoscaling/src/main/java/org/elasticsearch/xpack/autoscaling/Autoscaling.java

@@ -15,6 +15,7 @@ import org.elasticsearch.cluster.NamedDiff;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.Metadata;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -119,10 +120,10 @@ public class Autoscaling extends Plugin implements ActionPlugin, ExtensiblePlugi
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         this.clusterServiceHolder.set(clusterService);
-        this.allocationDeciders.set(allocationDeciders);
+        this.allocationDeciders.set(allocationService.getAllocationDeciders());
         var capacityServiceHolder = new AutoscalingCalculateCapacityService.Holder(this);
         this.reservedAutoscalingPolicyAction.set(new ReservedAutoscalingPolicyAction(capacityServiceHolder));
         return List.of(capacityServiceHolder, autoscalingLicenseChecker, new AutoscalingNodeInfoService(clusterService, client));

x-pack/plugin/ccr/src/main/java/org/elasticsearch/xpack/ccr/Ccr.java

@@ -16,8 +16,8 @@ import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.Metadata;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -185,7 +185,7 @@ public class Ccr extends Plugin implements ActionPlugin, PersistentTaskPlugin, E
         final IndexNameExpressionResolver expressionResolver,
         final Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         this.client = client;
         if (enabled == false) {

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/XPackPlugin.java

@@ -19,9 +19,9 @@ import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.Metadata;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.routing.allocation.DataTier;
 import org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.logging.DeprecationCategory;
@@ -307,7 +307,7 @@ public class XPackPlugin extends XPackClientPlugin
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         List<Object> components = new ArrayList<>();
 

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/LocalStateCompositeXPackPlugin.java

@@ -26,9 +26,9 @@ import org.elasticsearch.cluster.metadata.IndexTemplateMetadata;
 import org.elasticsearch.cluster.metadata.SingleNodeShutdownMetadata;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.routing.allocation.ExistingShardsAllocator;
 import org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.CheckedBiConsumer;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -201,7 +201,7 @@ public class LocalStateCompositeXPackPlugin extends XPackPlugin
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         List<Object> components = new ArrayList<>();
         components.addAll(
@@ -218,7 +218,7 @@ public class LocalStateCompositeXPackPlugin extends XPackPlugin
                 expressionResolver,
                 repositoriesServiceSupplier,
                 tracer,
-                allocationDeciders
+                allocationService
             )
         );
 
@@ -238,7 +238,7 @@ public class LocalStateCompositeXPackPlugin extends XPackPlugin
                         expressionResolver,
                         repositoriesServiceSupplier,
                         tracer,
-                        allocationDeciders
+                        allocationService
                     )
                 )
             );

x-pack/plugin/deprecation/src/main/java/org/elasticsearch/xpack/deprecation/Deprecation.java

@@ -11,7 +11,7 @@ import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.logging.RateLimitingFilter;
@@ -100,7 +100,7 @@ public class Deprecation extends Plugin implements ActionPlugin {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         final DeprecationIndexingTemplateRegistry templateRegistry = new DeprecationIndexingTemplateRegistry(
             environment.settings(),

x-pack/plugin/enrich/src/main/java/org/elasticsearch/xpack/enrich/EnrichPlugin.java

@@ -13,7 +13,7 @@ import org.elasticsearch.cluster.NamedDiff;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.Metadata;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -201,7 +201,7 @@ public class EnrichPlugin extends Plugin implements SystemIndexPlugin, IngestPlu
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         EnrichPolicyLocks enrichPolicyLocks = new EnrichPolicyLocks();
         EnrichPolicyExecutor enrichPolicyExecutor = new EnrichPolicyExecutor(

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/plugin/EqlPlugin.java

@@ -12,7 +12,7 @@ import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.breaker.CircuitBreaker;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -83,7 +83,7 @@ public class EqlPlugin extends Plugin implements ActionPlugin, CircuitBreakerPlu
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         return createComponents(client, environment.settings(), clusterService);
     }

x-pack/plugin/fleet/src/main/java/org/elasticsearch/xpack/fleet/Fleet.java

@@ -23,7 +23,7 @@ import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.ComposableIndexTemplate;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -95,7 +95,7 @@ public class Fleet extends Plugin implements SystemIndexPlugin {
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         FleetTemplateRegistry registry = new FleetTemplateRegistry(
             environment.settings(),

x-pack/plugin/identity-provider/src/main/java/org/elasticsearch/xpack/idp/IdentityProviderPlugin.java

@@ -14,7 +14,7 @@ import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -98,7 +98,7 @@ public class IdentityProviderPlugin extends Plugin implements ActionPlugin {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         settings = environment.settings();
         enabled = ENABLED_SETTING.get(settings);

x-pack/plugin/ilm/src/internalClusterTest/java/org/elasticsearch/xpack/ilm/UpdateSettingsStepTests.java

@@ -12,7 +12,7 @@ import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.ClusterStateObserver;
 import org.elasticsearch.cluster.metadata.IndexMetadata;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.inject.AbstractModule;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -74,7 +74,7 @@ public class UpdateSettingsStepTests extends ESSingleNodeTestCase {
             IndexNameExpressionResolver expressionResolver,
             Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             return List.of(service);
         }

x-pack/plugin/ilm/src/main/java/org/elasticsearch/xpack/ilm/IndexLifecycle.java

@@ -15,7 +15,7 @@ import org.elasticsearch.client.internal.OriginSettingClient;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.Metadata;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry.Entry;
@@ -214,7 +214,7 @@ public class IndexLifecycle extends Plugin implements ActionPlugin, HealthPlugin
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         final List<Object> components = new ArrayList<>();
         ILMHistoryTemplateRegistry ilmTemplateRegistry = new ILMHistoryTemplateRegistry(

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/MachineLearning.java

@@ -29,7 +29,7 @@ import org.elasticsearch.cluster.metadata.SingleNodeShutdownMetadata;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodeRole;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.breaker.CircuitBreaker;
 import org.elasticsearch.common.collect.MapBuilder;
@@ -853,7 +853,7 @@ public class MachineLearning extends Plugin
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         if (enabled == false) {
             // special holder for @link(MachineLearningFeatureSetUsage) which needs access to job manager, empty if ML is disabled

x-pack/plugin/monitoring/src/main/java/org/elasticsearch/xpack/monitoring/Monitoring.java

@@ -12,7 +12,7 @@ import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.IndexTemplateMetadata;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -130,7 +130,7 @@ public class Monitoring extends Plugin implements ActionPlugin, ReloadablePlugin
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         final ClusterSettings clusterSettings = clusterService.getClusterSettings();
         final CleanerService cleanerService = new CleanerService(settings, clusterSettings, threadPool, getLicenseState());

x-pack/plugin/old-lucene-versions/src/main/java/org/elasticsearch/xpack/lucene/bwc/OldLuceneVersions.java

@@ -18,8 +18,8 @@ import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexMetadata;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNode;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.UUIDs;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -99,7 +99,7 @@ public class OldLuceneVersions extends Plugin implements IndexStorePlugin, Clust
         final IndexNameExpressionResolver resolver,
         final Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         this.failShardsListener.set(new FailShardsOnInvalidLicenseClusterListener(getLicenseState(), clusterService.getRerouteService()));
         if (DiscoveryNode.isMasterNode(environment.settings())) {

x-pack/plugin/profiler/src/main/java/org/elasticsearch/xpack/profiler/ProfilingPlugin.java

@@ -14,7 +14,7 @@ import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -74,7 +74,7 @@ public class ProfilingPlugin extends Plugin implements ActionPlugin {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         logger.info("Profiling is {}", enabled ? "enabled" : "disabled");
         return super.createComponents(
@@ -90,7 +90,7 @@ public class ProfilingPlugin extends Plugin implements ActionPlugin {
             indexNameExpressionResolver,
             repositoriesServiceSupplier,
             tracer,
-            allocationDeciders
+            allocationService
         );
     }
 

x-pack/plugin/rollup/src/main/java/org/elasticsearch/xpack/rollup/Rollup.java

@@ -12,7 +12,7 @@ import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -114,7 +114,7 @@ public class Rollup extends Plugin implements ActionPlugin, PersistentTaskPlugin
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         return emptyList();
     }

x-pack/plugin/searchable-snapshots/src/main/java/org/elasticsearch/xpack/searchablesnapshots/SearchableSnapshots.java

@@ -22,10 +22,10 @@ import org.elasticsearch.cluster.metadata.RepositoryMetadata;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
 import org.elasticsearch.cluster.routing.RerouteService;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.routing.allocation.DataTier;
 import org.elasticsearch.cluster.routing.allocation.ExistingShardsAllocator;
 import org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.Priority;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -331,7 +331,7 @@ public class SearchableSnapshots extends Plugin implements IndexStorePlugin, Eng
         final IndexNameExpressionResolver resolver,
         final Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         final List<Object> components = new ArrayList<>();
         this.repositoriesServiceSupplier = repositoriesServiceSupplier;

x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/Security.java

@@ -22,7 +22,7 @@ import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.IndexTemplateMetadata;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.CheckedBiConsumer;
 import org.elasticsearch.common.Strings;
@@ -563,7 +563,7 @@ public class Security extends Plugin
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         try {
             return createComponents(

x-pack/plugin/shutdown/src/internalClusterTest/java/org/elasticsearch/xpack/shutdown/NodeShutdownTasksIT.java

@@ -21,7 +21,7 @@ import org.elasticsearch.cluster.ClusterStateListener;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.SingleNodeShutdownMetadata;
 import org.elasticsearch.cluster.node.DiscoveryNode;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.io.stream.StreamInput;
@@ -146,7 +146,7 @@ public class NodeShutdownTasksIT extends ESIntegTestCase {
             IndexNameExpressionResolver indexNameExpressionResolver,
             Supplier<RepositoriesService> repositoriesServiceSupplier,
             Tracer tracer,
-            AllocationDeciders allocationDeciders
+            AllocationService allocationService
         ) {
             taskExecutor = new TaskExecutor(client, clusterService, threadPool);
             return Collections.singletonList(taskExecutor);

x-pack/plugin/shutdown/src/main/java/org/elasticsearch/xpack/shutdown/ShutdownPlugin.java

@@ -12,7 +12,7 @@ import org.elasticsearch.action.support.master.AcknowledgedResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -53,7 +53,7 @@ public class ShutdownPlugin extends Plugin implements ActionPlugin {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
 
         NodeSeenService nodeSeenService = new NodeSeenService(clusterService);

x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/plugin/SqlPlugin.java

@@ -11,7 +11,7 @@ import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -99,7 +99,7 @@ public class SqlPlugin extends Plugin implements ActionPlugin {
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
 
         return createComponents(client, environment.settings(), clusterService, namedWriteableRegistry);

x-pack/plugin/stack/src/main/java/org/elasticsearch/xpack/stack/StackPlugin.java

@@ -8,7 +8,7 @@ package org.elasticsearch.xpack.stack;
 
 import org.elasticsearch.client.internal.Client;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Setting;
@@ -55,7 +55,7 @@ public class StackPlugin extends Plugin implements ActionPlugin {
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         StackTemplateRegistry templateRegistry = new StackTemplateRegistry(settings, clusterService, threadPool, client, xContentRegistry);
         templateRegistry.initialize();

x-pack/plugin/transform/src/main/java/org/elasticsearch/xpack/transform/Transform.java

@@ -24,7 +24,7 @@ import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.IndexTemplateMetadata;
 import org.elasticsearch.cluster.metadata.Metadata;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -235,7 +235,7 @@ public class Transform extends Plugin implements SystemIndexPlugin, PersistentTa
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         TransformConfigManager configManager = new IndexBasedTransformConfigManager(
             clusterService,

x-pack/plugin/voting-only-node/src/main/java/org/elasticsearch/cluster/coordination/votingonly/VotingOnlyNodePlugin.java

@@ -20,7 +20,7 @@ import org.elasticsearch.cluster.coordination.PublicationTransportHandler;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodeRole;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.io.stream.StreamInput;
@@ -95,7 +95,7 @@ public class VotingOnlyNodePlugin extends Plugin implements DiscoveryPlugin, Net
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         this.threadPool.set(threadPool);
         return Collections.emptyList();

x-pack/plugin/watcher/src/main/java/org/elasticsearch/xpack/watcher/Watcher.java

@@ -24,7 +24,7 @@ import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.metadata.IndexTemplateMetadata;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
+import org.elasticsearch.cluster.routing.allocation.AllocationService;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -307,7 +307,7 @@ public class Watcher extends Plugin implements SystemIndexPlugin, ScriptPlugin,
         IndexNameExpressionResolver expressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier,
         Tracer tracer,
-        AllocationDeciders allocationDeciders
+        AllocationService allocationService
     ) {
         if (enabled == false) {
             return Collections.emptyList();