Remove health historical features and upgrade test (elastic#116928)

server/src/main/java/org/elasticsearch/health/HealthFeatures.java

@@ -9,34 +9,17 @@
 
 package org.elasticsearch.health;
 
-import org.elasticsearch.Version;
 import org.elasticsearch.features.FeatureSpecification;
 import org.elasticsearch.features.NodeFeature;
 
-import java.util.Map;
 import java.util.Set;
 
 public class HealthFeatures implements FeatureSpecification {
 
-    public static final NodeFeature SUPPORTS_HEALTH = new NodeFeature("health.supports_health");
-    public static final NodeFeature SUPPORTS_HEALTH_REPORT_API = new NodeFeature("health.supports_health_report_api");
-    public static final NodeFeature SUPPORTS_SHARDS_CAPACITY_INDICATOR = new NodeFeature("health.shards_capacity_indicator");
     public static final NodeFeature SUPPORTS_EXTENDED_REPOSITORY_INDICATOR = new NodeFeature("health.extended_repository_indicator");
 
     @Override
     public Set<NodeFeature> getFeatures() {
         return Set.of(SUPPORTS_EXTENDED_REPOSITORY_INDICATOR);
     }
-
-    @Override
-    public Map<NodeFeature, Version> getHistoricalFeatures() {
-        return Map.of(
-            SUPPORTS_HEALTH,
-            Version.V_8_5_0,                // health accessible via /_internal/_health
-            SUPPORTS_HEALTH_REPORT_API,
-            Version.V_8_7_0,                // health accessible via /_health_report
-            SUPPORTS_SHARDS_CAPACITY_INDICATOR,
-            Version.V_8_8_0
-        );
-    }
 }

server/src/main/java/org/elasticsearch/health/metadata/HealthMetadataService.java

@@ -28,7 +28,6 @@
 import org.elasticsearch.core.Tuple;
 import org.elasticsearch.features.FeatureService;
 import org.elasticsearch.gateway.GatewayService;
-import org.elasticsearch.health.HealthFeatures;
 
 import java.util.List;
 import java.util.stream.Stream;
@@ -137,7 +136,7 @@ private void updateOnHealthNodeEnabledChange(boolean enabled) {
 
     private boolean canPostClusterStateUpdates(ClusterState state) {
         // Wait until every node in the cluster supports health checks
-        return isMaster && state.clusterRecovered() && featureService.clusterHasFeature(state, HealthFeatures.SUPPORTS_HEALTH);
+        return isMaster && state.clusterRecovered();
     }
 
     private void updateOnClusterStateChange(ClusterChangedEvent event) {

server/src/main/java/org/elasticsearch/health/node/DiskHealthIndicatorService.java

@@ -20,7 +20,6 @@
 import org.elasticsearch.common.util.set.Sets;
 import org.elasticsearch.features.FeatureService;
 import org.elasticsearch.health.Diagnosis;
-import org.elasticsearch.health.HealthFeatures;
 import org.elasticsearch.health.HealthIndicatorDetails;
 import org.elasticsearch.health.HealthIndicatorImpact;
 import org.elasticsearch.health.HealthIndicatorResult;
@@ -91,15 +90,6 @@ public HealthIndicatorResult calculate(boolean verbose, int maxAffectedResources
         ClusterState clusterState = clusterService.state();
         Map<String, DiskHealthInfo> diskHealthInfoMap = healthInfo.diskInfoByNode();
         if (diskHealthInfoMap == null || diskHealthInfoMap.isEmpty()) {
-            if (featureService.clusterHasFeature(clusterState, HealthFeatures.SUPPORTS_HEALTH) == false) {
-                return createIndicator(
-                    HealthStatus.GREEN,
-                    "No disk usage data available. The cluster currently has mixed versions (an upgrade may be in progress).",
-                    HealthIndicatorDetails.EMPTY,
-                    List.of(),
-                    List.of()
-                );
-            }
             /*
              * If there is no disk health info, that either means that a new health node was just elected, or something is seriously
              * wrong with health data collection on the health node. Either way, we immediately return UNKNOWN. If there are at least

server/src/main/java/org/elasticsearch/health/node/LocalHealthMonitor.java

@@ -25,7 +25,6 @@
 import org.elasticsearch.common.util.concurrent.RunOnce;
 import org.elasticsearch.core.TimeValue;
 import org.elasticsearch.features.FeatureService;
-import org.elasticsearch.health.HealthFeatures;
 import org.elasticsearch.health.metadata.HealthMetadata;
 import org.elasticsearch.health.node.action.HealthNodeNotDiscoveredException;
 import org.elasticsearch.health.node.selection.HealthNode;
@@ -200,7 +199,6 @@ public void clusterChanged(ClusterChangedEvent event) {
             }
         }
         prerequisitesFulfilled = event.state().clusterRecovered()
-            && featureService.clusterHasFeature(event.state(), HealthFeatures.SUPPORTS_HEALTH)
             && HealthMetadata.getFromClusterState(event.state()) != null
             && currentHealthNode != null
             && currentMasterNode != null;

server/src/main/java/org/elasticsearch/health/node/ShardsCapacityHealthIndicatorService.java

@@ -16,7 +16,6 @@
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.features.FeatureService;
 import org.elasticsearch.health.Diagnosis;
-import org.elasticsearch.health.HealthFeatures;
 import org.elasticsearch.health.HealthIndicatorDetails;
 import org.elasticsearch.health.HealthIndicatorImpact;
 import org.elasticsearch.health.HealthIndicatorResult;
@@ -111,15 +110,6 @@ public HealthIndicatorResult calculate(boolean verbose, int maxAffectedResources
         var state = clusterService.state();
         var healthMetadata = HealthMetadata.getFromClusterState(state);
         if (healthMetadata == null || healthMetadata.getShardLimitsMetadata() == null) {
-            if (featureService.clusterHasFeature(state, HealthFeatures.SUPPORTS_SHARDS_CAPACITY_INDICATOR) == false) {
-                return createIndicator(
-                    HealthStatus.GREEN,
-                    "No shard limits configured yet. The cluster currently has mixed versions (an upgrade may be in progress).",
-                    HealthIndicatorDetails.EMPTY,
-                    List.of(),
-                    List.of()
-                );
-            }
             return unknownIndicator();
         }
 

server/src/main/java/org/elasticsearch/health/node/selection/HealthNodeTaskExecutor.java

@@ -23,7 +23,6 @@
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.features.FeatureService;
-import org.elasticsearch.health.HealthFeatures;
 import org.elasticsearch.node.NodeClosedException;
 import org.elasticsearch.persistent.AllocatedPersistentTask;
 import org.elasticsearch.persistent.PersistentTaskParams;
@@ -157,11 +156,8 @@ public PersistentTasksCustomMetadata.Assignment getAssignment(
 
     // visible for testing
     void startTask(ClusterChangedEvent event) {
-        // Wait until every node in the cluster supports health checks
-        if (event.localNodeMaster()
-            && event.state().clusterRecovered()
-            && HealthNode.findTask(event.state()) == null
-            && featureService.clusterHasFeature(event.state(), HealthFeatures.SUPPORTS_HEALTH)) {
+        // Wait until master is stable before starting health task
+        if (event.localNodeMaster() && event.state().clusterRecovered() && HealthNode.findTask(event.state()) == null) {
             persistentTasksService.sendStartRequest(
                 TASK_NAME,
                 TASK_NAME,

server/src/test/java/org/elasticsearch/health/node/DiskHealthIndicatorServiceTests.java

@@ -29,7 +29,6 @@
 import org.elasticsearch.common.xcontent.LoggingDeprecationHandler;
 import org.elasticsearch.features.FeatureService;
 import org.elasticsearch.health.Diagnosis;
-import org.elasticsearch.health.HealthFeatures;
 import org.elasticsearch.health.HealthIndicatorDetails;
 import org.elasticsearch.health.HealthIndicatorImpact;
 import org.elasticsearch.health.HealthIndicatorResult;
@@ -1085,12 +1084,8 @@ static ClusterState createClusterState(
         Collection<DiscoveryNode> nodes,
         Map<String, Set<String>> indexNameToNodeIdsMap
     ) {
-        Map<String, Set<String>> features = new HashMap<>();
         DiscoveryNodes.Builder nodesBuilder = DiscoveryNodes.builder();
-        for (DiscoveryNode node : nodes) {
-            nodesBuilder = nodesBuilder.add(node);
-            features.put(node.getId(), Set.of(HealthFeatures.SUPPORTS_HEALTH.id()));
-        }
+        nodes.forEach(nodesBuilder::add);
         nodesBuilder.localNodeId(randomFrom(nodes).getId());
         nodesBuilder.masterNodeId(randomFrom(nodes).getId());
         ClusterBlocks.Builder clusterBlocksBuilder = new ClusterBlocks.Builder();
@@ -1125,7 +1120,6 @@ static ClusterState createClusterState(
         state.metadata(metadata.generateClusterUuidIfNeeded().build());
         state.routingTable(routingTable.build());
         state.blocks(clusterBlocksBuilder);
-        state.nodeFeatures(features);
         return state.build();
     }
 

server/src/test/java/org/elasticsearch/health/node/ShardsCapacityHealthIndicatorServiceTests.java

@@ -21,7 +21,6 @@
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.LoggingDeprecationHandler;
 import org.elasticsearch.features.FeatureService;
-import org.elasticsearch.health.HealthFeatures;
 import org.elasticsearch.health.HealthIndicatorDetails;
 import org.elasticsearch.health.HealthStatus;
 import org.elasticsearch.health.metadata.HealthMetadata;
@@ -451,11 +450,7 @@ private ClusterState createClusterState(
             metadata.put(idxMetadata);
         }
 
-        var features = Set.of(HealthFeatures.SUPPORTS_SHARDS_CAPACITY_INDICATOR.id());
-        return ClusterState.builder(clusterState)
-            .metadata(metadata)
-            .nodeFeatures(Map.of(dataNode.getId(), features, frozenNode.getId(), features))
-            .build();
+        return ClusterState.builder(clusterState).metadata(metadata).build();
     }
 
     private static IndexMetadata.Builder createIndexInDataNode(int shards) {

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

@@ -13,8 +13,6 @@
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.service.ClusterService;
-import org.elasticsearch.features.FeatureService;
-import org.elasticsearch.features.NodeFeature;
 import org.elasticsearch.health.stats.HealthApiStatsAction;
 import org.elasticsearch.injection.guice.Inject;
 import org.elasticsearch.protocol.xpack.XPackUsageRequest;
@@ -30,10 +28,7 @@
  */
 public class HealthApiUsageTransportAction extends XPackUsageFeatureTransportAction {
 
-    static final NodeFeature SUPPORTS_HEALTH_STATS = new NodeFeature("health.supports_health_stats");
-
     private final Client client;
-    private final FeatureService featureService;
 
     @Inject
     public HealthApiUsageTransportAction(
@@ -42,8 +37,7 @@ public HealthApiUsageTransportAction(
         ThreadPool threadPool,
         ActionFilters actionFilters,
         IndexNameExpressionResolver indexNameExpressionResolver,
-        Client client,
-        FeatureService featureService
+        Client client
     ) {
         super(
             XPackUsageFeatureAction.HEALTH.name(),
@@ -54,7 +48,6 @@ public HealthApiUsageTransportAction(
             indexNameExpressionResolver
         );
         this.client = client;
-        this.featureService = featureService;
     }
 
     @Override
@@ -70,7 +63,7 @@ protected void masterOperation(
             client.threadPool().getThreadContext()
         );
 
-        if (state.clusterRecovered() && featureService.clusterHasFeature(state, SUPPORTS_HEALTH_STATS)) {
+        if (state.clusterRecovered()) {
             HealthApiStatsAction.Request statsRequest = new HealthApiStatsAction.Request();
             statsRequest.setParentTask(clusterService.localNode().getId(), task.getId());
             client.execute(HealthApiStatsAction.INSTANCE, statsRequest, preservingListener.delegateFailureAndWrap((l, r) -> {

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

@@ -7,13 +7,11 @@
 
 package org.elasticsearch.xpack.core;
 
-import org.elasticsearch.Version;
 import org.elasticsearch.features.FeatureSpecification;
 import org.elasticsearch.features.NodeFeature;
 import org.elasticsearch.license.License;
 import org.elasticsearch.xpack.core.datatiers.NodesDataTiersUsageTransportAction;
 
-import java.util.Map;
 import java.util.Set;
 
 /**
@@ -32,9 +30,4 @@ public Set<NodeFeature> getFeatures() {
             LOGSDB_TELMETRY_STATS
         );
     }
-
-    @Override
-    public Map<NodeFeature, Version> getHistoricalFeatures() {
-        return Map.of(HealthApiUsageTransportAction.SUPPORTS_HEALTH_STATS, Version.V_8_7_0);
-    }
 }