[Transform] Rename internal indexes for transform plugin

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/transform/transforms/persistence/TransformInternalIndexConstants.java

@@ -22,16 +22,20 @@ public final class TransformInternalIndexConstants {
      */
 
     // internal index
-    public static final String INDEX_VERSION = "2";
-    public static final String INDEX_PATTERN = ".data-frame-internal-";
+
+    // version is not a rollover pattern, however padded because sort is string based
+    public static final String INDEX_VERSION = "003";
+    public static final String INDEX_PATTERN = ".transform-internal-";
     public static final String LATEST_INDEX_VERSIONED_NAME = INDEX_PATTERN + INDEX_VERSION;
     public static final String LATEST_INDEX_NAME = LATEST_INDEX_VERSIONED_NAME;
     public static final String INDEX_NAME_PATTERN = INDEX_PATTERN + "*";
+    public static final String INDEX_NAME_PATTERN_DEPRECATED = ".data-frame-internal-*";
 
     // audit index
-    public static final String AUDIT_TEMPLATE_VERSION = "1";
+    public static final String AUDIT_TEMPLATE_VERSION = "000001";
     public static final String AUDIT_INDEX_PREFIX = ".transform-notifications-";
     public static final String AUDIT_INDEX_PATTERN = AUDIT_INDEX_PREFIX + "*";
+    public static final String AUDIT_INDEX_DEPRECATED = ".data-frame-notifications-1";
     public static final String AUDIT_INDEX_PATTERN_DEPRECATED = ".data-frame-notifications-*";
 
     public static final String AUDIT_INDEX_READ_ALIAS = ".transform-notifications-read";

x-pack/plugin/transform/qa/single-node-tests/src/test/java/org/elasticsearch/xpack/transform/integration/TransformAuditorIT.java

@@ -7,6 +7,8 @@
 package org.elasticsearch.xpack.transform.integration;
 
 import org.elasticsearch.client.Request;
+import org.elasticsearch.cluster.metadata.IndexMetaData;
+import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.xpack.core.transform.transforms.persistence.TransformInternalIndexConstants;
 import org.junit.Before;
 
@@ -48,7 +50,7 @@ public void createIndexes() throws IOException {
         createReviewsIndex();
         indicesCreated = true;
         setupDataAccessRole(DATA_ACCESS_ROLE, REVIEWS_INDEX_NAME);
-        setupUser(TEST_USER_NAME, Arrays.asList("data_frame_transforms_admin", DATA_ACCESS_ROLE));
+        setupUser(TEST_USER_NAME, Arrays.asList("transform_admin", DATA_ACCESS_ROLE));
     }
 
     @SuppressWarnings("unchecked")
@@ -67,6 +69,7 @@ public void testAuditorWritesAudits() throws Exception {
         request.setJsonEntity("{\"query\":{\"term\":{\"transform_id\":\"simple_pivot_for_audit\"}}}");
         assertBusy(() -> {
             assertTrue(indexExists(TransformInternalIndexConstants.AUDIT_INDEX));
+            assertTrue(aliasExists(TransformInternalIndexConstants.AUDIT_INDEX_READ_ALIAS));
         });
         // Since calls to write the AbstractAuditor are sent and forgot (async) we could have returned from the start,
         // finished the job (as this is a very short DF job), all without the audit being fully written.
@@ -85,4 +88,16 @@ public void testAuditorWritesAudits() throws Exception {
         });
 
     }
+
+    public void testAliasCreatedforBWCIndexes() throws Exception {
+        Settings.Builder settings = Settings.builder()
+                .put(IndexMetaData.INDEX_NUMBER_OF_SHARDS_SETTING.getKey(), 1)
+                .put(IndexMetaData.INDEX_NUMBER_OF_REPLICAS_SETTING.getKey(), 0);
+
+        createIndex(TransformInternalIndexConstants.AUDIT_INDEX_DEPRECATED, settings.build());
+        assertBusy(() -> {
+            assertTrue(aliasExists(TransformInternalIndexConstants.AUDIT_INDEX_DEPRECATED,
+                    TransformInternalIndexConstants.AUDIT_INDEX_READ_ALIAS));
+        });
+    }
 }

x-pack/plugin/transform/qa/single-node-tests/src/test/java/org/elasticsearch/xpack/transform/integration/TransformInternalIndexIT.java

@@ -43,7 +43,7 @@ public class TransformInternalIndexIT extends ESRestTestCase {
 
 
     private static final String CURRENT_INDEX = TransformInternalIndexConstants.LATEST_INDEX_NAME;
-    private static final String OLD_INDEX = TransformInternalIndexConstants.INDEX_PATTERN + "1";
+    private static final String OLD_INDEX = TransformInternalIndexConstants.INDEX_PATTERN + "001";
 
 
     public void testUpdateDeletesOldTransformConfig() throws Exception {

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

@@ -222,7 +222,8 @@ public Collection<Object> createComponents(Client client, ClusterService cluster
                                                                       transformConfigManager.get(),
                                                                       transformAuditor.get()));
 
-        return Arrays.asList(transformConfigManager.get(), transformAuditor.get(), transformCheckpointService.get());
+        return Arrays.asList(transformConfigManager.get(), transformAuditor.get(), transformCheckpointService.get(),
+                new TransformClusterStateListener(clusterService, client));
     }
 
     @Override

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

@@ -0,0 +1,89 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+package org.elasticsearch.xpack.transform;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.action.admin.indices.alias.IndicesAliasesRequest;
+import org.elasticsearch.action.support.master.AcknowledgedResponse;
+import org.elasticsearch.client.Client;
+import org.elasticsearch.cluster.ClusterChangedEvent;
+import org.elasticsearch.cluster.ClusterState;
+import org.elasticsearch.cluster.ClusterStateListener;
+import org.elasticsearch.cluster.service.ClusterService;
+import org.elasticsearch.gateway.GatewayService;
+import org.elasticsearch.xpack.core.transform.transforms.persistence.TransformInternalIndexConstants;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import static org.elasticsearch.xpack.core.ClientHelper.TRANSFORM_ORIGIN;
+import static org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin;
+
+class TransformClusterStateListener implements ClusterStateListener {
+
+    private static final Logger logger = LogManager.getLogger(TransformClusterStateListener.class);
+
+    private final Client client;
+    private final AtomicBoolean isIndexCreationInProgress = new AtomicBoolean(false);
+
+    TransformClusterStateListener(ClusterService clusterService, Client client) {
+        this.client = client;
+        clusterService.addListener(this);
+        logger.debug("Created TransformClusterStateListener");
+    }
+
+    @Override
+    public void clusterChanged(ClusterChangedEvent event) {
+        if (event.state().blocks().hasGlobalBlock(GatewayService.STATE_NOT_RECOVERED_BLOCK)) {
+            // Wait until the gateway has recovered from disk.
+            return;
+        }
+
+        // The atomic flag prevents multiple simultaneous attempts to run alias creation
+        // if there is a flurry of cluster state updates in quick succession
+        if (event.localNodeMaster() && isIndexCreationInProgress.compareAndSet(false, true)) {
+            createAuditAliasForDataFrameBWC(event.state(), client, ActionListener.wrap(
+                r -> {
+                    isIndexCreationInProgress.set(false);
+                    if (r) {
+                        logger.info("Created alias for deprecated data frame notifications index");
+                    } else {
+                        logger.debug("Skipped creating alias for deprecated data frame notifications index");
+                    }
+                },
+                e -> {
+                    isIndexCreationInProgress.set(false);
+                    logger.error("Error creating alias for deprecated data frame notifications index", e);
+                }));
+        }
+    }
+
+    private static void createAuditAliasForDataFrameBWC(ClusterState state, Client client, final ActionListener<Boolean> finalListener) {
+
+        // check if old audit index exists, no need to create the alias if it does not
+        if (state.getMetaData().getAliasAndIndexLookup().containsKey(TransformInternalIndexConstants.AUDIT_INDEX_DEPRECATED) == false) {
+            finalListener.onResponse(false);
+            return;
+        }
+
+        if (state.getMetaData().getAliasAndIndexLookup().get(TransformInternalIndexConstants.AUDIT_INDEX_DEPRECATED).getIndices().stream()
+                .anyMatch(metaData -> metaData.getAliases().containsKey(TransformInternalIndexConstants.AUDIT_INDEX_READ_ALIAS))) {
+            finalListener.onResponse(false);
+            return;
+        }
+
+        final IndicesAliasesRequest request = client.admin().indices().prepareAliases()
+                .addAlias(TransformInternalIndexConstants.AUDIT_INDEX_DEPRECATED, TransformInternalIndexConstants.AUDIT_INDEX_READ_ALIAS)
+                .request();
+
+        executeAsyncWithOrigin(client.threadPool().getThreadContext(), TRANSFORM_ORIGIN, request,
+                ActionListener.<AcknowledgedResponse>wrap(r -> finalListener.onResponse(r.isAcknowledged()), finalListener::onFailure),
+                client.admin().indices()::aliases);
+    }
+
+}

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

@@ -110,7 +110,10 @@ static void getStatisticSummations(Client client, ActionListener<TransformIndexe
             .filter(QueryBuilders.termQuery(TransformField.INDEX_DOC_TYPE.getPreferredName(),
                     TransformStoredDoc.NAME)));
 
-        SearchRequestBuilder requestBuilder = client.prepareSearch(TransformInternalIndexConstants.INDEX_NAME_PATTERN)
+        SearchRequestBuilder requestBuilder = client
+            .prepareSearch(
+                TransformInternalIndexConstants.INDEX_NAME_PATTERN,
+                TransformInternalIndexConstants.INDEX_NAME_PATTERN_DEPRECATED)
             .setSize(0)
             .setQuery(queryBuilder);
 

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

@@ -32,10 +32,10 @@
 import org.elasticsearch.xpack.core.action.XPackUsageFeatureTransportAction;
 import org.elasticsearch.xpack.core.transform.TransformFeatureSetUsage;
 import org.elasticsearch.xpack.core.transform.TransformField;
-import org.elasticsearch.xpack.core.transform.transforms.TransformIndexerStats;
-import org.elasticsearch.xpack.core.transform.transforms.TransformTaskParams;
 import org.elasticsearch.xpack.core.transform.transforms.TransformConfig;
+import org.elasticsearch.xpack.core.transform.transforms.TransformIndexerStats;
 import org.elasticsearch.xpack.core.transform.transforms.TransformState;
+import org.elasticsearch.xpack.core.transform.transforms.TransformTaskParams;
 import org.elasticsearch.xpack.core.transform.transforms.TransformTaskState;
 import org.elasticsearch.xpack.core.transform.transforms.persistence.TransformInternalIndexConstants;
 
@@ -118,7 +118,9 @@ protected void masterOperation(Task task, XPackUsageRequest request, ClusterStat
             }
         );
 
-        SearchRequest totalTransformCount = client.prepareSearch(TransformInternalIndexConstants.INDEX_NAME_PATTERN)
+        SearchRequest totalTransformCount = client
+            .prepareSearch(TransformInternalIndexConstants.INDEX_NAME_PATTERN,
+                TransformInternalIndexConstants.INDEX_NAME_PATTERN_DEPRECATED)
             .setTrackTotalHits(true)
             .setQuery(QueryBuilders.constantScoreQuery(QueryBuilders.boolQuery()
                 .filter(QueryBuilders.termQuery(TransformField.INDEX_DOC_TYPE.getPreferredName(), TransformConfig.NAME))))

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

@@ -63,7 +63,8 @@ protected ParseField getResultsField() {
 
     @Override
     protected String[] getIndices() {
-        return new String[]{TransformInternalIndexConstants.INDEX_NAME_PATTERN};
+        return new String[] { TransformInternalIndexConstants.INDEX_NAME_PATTERN,
+            TransformInternalIndexConstants.INDEX_NAME_PATTERN_DEPRECATED };
     }
 
     @Override