Fix FollowIndexSecurityIT.testAutoFollowPatterns (#87853) (#87915)

The test FollowIndexSecurityIT.testAutoFollowPatterns sometimes 
fails when verifying the monitoring documents about auto-follow 
stats. I wasn't able to reproduce locally but I suspect that monitoring 
collects auto-follow stats before they are updated. Instead it should 
collect auto follow stats monitoring documents once indices are 
effectively followed.

There are also some index / auto-follow pattern conflicts with other 
tests in the same class, so this PR also changes that. In case this 
fix is not enough, the full monitoring documents should appear in 
test log to help further debugging.

Closes #84888

x-pack/plugin/ccr/qa/security/build.gradle

@@ -25,7 +25,7 @@ testClusters.register('follow-cluster') {
     }
     setting 'xpack.license.self_generated.type', 'trial'
     setting 'xpack.security.enabled', 'true'
-    setting 'xpack.monitoring.collection.enabled', 'true'
+    setting 'xpack.monitoring.collection.enabled', 'false' // will be enabled by tests
     extraConfigFile 'roles.yml', file('follower-roles.yml')
     user username: "test_admin", role: "superuser"
     user username: "test_ccr", role: "ccruser"

x-pack/plugin/ccr/qa/security/follower-roles.yml

@@ -2,7 +2,7 @@ ccruser:
   cluster:
     - manage_ccr
   indices:
-    - names: [ 'allowed-index', 'forget-follower', 'logs-eu*' ]
+    - names: [ 'allowed-index', 'forget-follower', 'logs-eu*', 'testautofollowpatterns-eu*' ]
       privileges:
         - monitor
         - read

x-pack/plugin/ccr/qa/security/leader-roles.yml

@@ -2,7 +2,7 @@ ccruser:
   cluster:
     - read_ccr
   indices:
-    - names: [ 'allowed-index', 'clean-leader', 'forget-leader', 'logs-eu*' ]
+    - names: [ 'allowed-index', 'clean-leader', 'forget-leader', 'logs-eu*', 'testautofollowpatterns-eu*' ]
       privileges:
         - manage
         - read

x-pack/plugin/ccr/qa/security/src/test/java/org/elasticsearch/xpack/ccr/FollowIndexSecurityIT.java

@@ -6,14 +6,18 @@
  */
 package org.elasticsearch.xpack.ccr;
 
+import org.apache.logging.log4j.Logger;
 import org.elasticsearch.client.Request;
+import org.elasticsearch.client.RequestOptions;
 import org.elasticsearch.client.Response;
 import org.elasticsearch.client.ResponseException;
 import org.elasticsearch.client.RestClient;
+import org.elasticsearch.client.WarningsHandler;
 import org.elasticsearch.common.settings.SecureString;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.concurrent.ThreadContext;
 import org.elasticsearch.common.xcontent.support.XContentMapValues;
+import org.elasticsearch.core.CheckedRunnable;
 import org.elasticsearch.index.seqno.ReplicationTracker;
 import org.elasticsearch.test.rest.ObjectPath;
 
@@ -69,7 +73,9 @@ public void testFollowIndex() throws Exception {
             followIndex("leader_cluster", allowedIndex, allowedIndex);
             assertBusy(() -> verifyDocuments(allowedIndex, numDocs, "*:*"));
             assertThat(getCcrNodeTasks(), contains(new CcrNodeTask("leader_cluster", allowedIndex, allowedIndex, 0)));
-            assertBusy(() -> verifyCcrMonitoring(allowedIndex, allowedIndex), 120L, TimeUnit.SECONDS);
+
+            withMonitoring(logger, () -> { assertBusy(() -> verifyCcrMonitoring(allowedIndex, allowedIndex), 120L, TimeUnit.SECONDS); });
+
             pauseFollow(allowedIndex);
             // Make sure that there are no other ccr relates operations running:
             assertBusy(() -> {
@@ -141,20 +147,22 @@ public void testFollowIndex() throws Exception {
     public void testAutoFollowPatterns() throws Exception {
         assumeTrue("Test should only run with target_cluster=follow", "follow".equals(targetCluster));
 
-        String allowedIndex = "logs-eu_20190101";
-        String disallowedIndex = "logs-us_20190101";
+        final String prefix = getTestName().toLowerCase(Locale.ROOT);
+        String allowedIndex = prefix + "-eu_20190101";
+        String disallowedIndex = prefix + "-us_20190101";
 
+        final String pattern = "pattern_" + prefix;
         {
-            Request request = new Request("PUT", "/_ccr/auto_follow/test_pattern");
+            Request request = new Request("PUT", "/_ccr/auto_follow/" + pattern);
             request.setJsonEntity("""
-                {"leader_index_patterns": ["logs-*"], "remote_cluster": "leader_cluster"}""");
+                {"leader_index_patterns": ["testautofollowpatterns-*"], "remote_cluster": "leader_cluster"}""");
             Exception e = expectThrows(ResponseException.class, () -> assertOK(client().performRequest(request)));
-            assertThat(e.getMessage(), containsString("insufficient privileges to follow index [logs-*]"));
+            assertThat(e.getMessage(), containsString("insufficient privileges to follow index [testautofollowpatterns-*]"));
         }
 
-        Request request = new Request("PUT", "/_ccr/auto_follow/test_pattern");
+        Request request = new Request("PUT", "/_ccr/auto_follow/" + pattern);
         request.setJsonEntity("""
-            {"leader_index_patterns": ["logs-eu*"], "remote_cluster": "leader_cluster"}""");
+            {"leader_index_patterns": ["testautofollowpatterns-eu*"], "remote_cluster": "leader_cluster"}""");
         assertOK(client().performRequest(request));
 
         try (RestClient leaderClient = buildLeaderClient()) {
@@ -176,12 +184,14 @@ public void testAutoFollowPatterns() throws Exception {
             assertBusy(() -> ensureYellow(allowedIndex), 30, TimeUnit.SECONDS);
             assertBusy(() -> verifyDocuments(allowedIndex, 5, "*:*"), 30, TimeUnit.SECONDS);
             assertThat(indexExists(disallowedIndex), is(false));
-            assertBusy(() -> verifyCcrMonitoring(allowedIndex, allowedIndex), 120L, TimeUnit.SECONDS);
-            assertBusy(ESCCRRestTestCase::verifyAutoFollowMonitoring, 120L, TimeUnit.SECONDS);
+            withMonitoring(logger, () -> {
+                assertBusy(() -> verifyCcrMonitoring(allowedIndex, allowedIndex), 120L, TimeUnit.SECONDS);
+                assertBusy(ESCCRRestTestCase::verifyAutoFollowMonitoring, 120L, TimeUnit.SECONDS);
+            });
         } finally {
             // Cleanup by deleting auto follow pattern and pause following:
             try {
-                deleteAutoFollowPattern("test_pattern");
+                deleteAutoFollowPattern(pattern);
                 pauseFollow(allowedIndex);
             } catch (Throwable e) {
                 logger.warn("Failed to cleanup after the test", e);
@@ -306,6 +316,30 @@ public void testUnPromoteAndFollowDataStream() throws Exception {
         }
     }
 
+    private static void withMonitoring(Logger logger, CheckedRunnable<Exception> runnable) throws Exception {
+        Request enableMonitoring = new Request("PUT", "/_cluster/settings");
+        enableMonitoring.setOptions(RequestOptions.DEFAULT.toBuilder().setWarningsHandler(WarningsHandler.PERMISSIVE).build());
+        enableMonitoring.setJsonEntity(
+            "{\"persistent\":{" + "\"xpack.monitoring.collection.enabled\":true," + "\"xpack.monitoring.collection.interval\":\"1s\"" + "}}"
+        );
+        assertOK(adminClient().performRequest(enableMonitoring));
+        logger.info("monitoring collection enabled");
+        try {
+            runnable.run();
+        } finally {
+            Request disableMonitoring = new Request("PUT", "/_cluster/settings");
+            disableMonitoring.setOptions(RequestOptions.DEFAULT.toBuilder().setWarningsHandler(WarningsHandler.PERMISSIVE).build());
+            disableMonitoring.setJsonEntity(
+                "{\"persistent\":{"
+                    + "\"xpack.monitoring.collection.enabled\":null,"
+                    + "\"xpack.monitoring.collection.interval\":null"
+                    + "}}"
+            );
+            assertOK(adminClient().performRequest(disableMonitoring));
+            logger.info("monitoring collection disabled");
+        }
+    }
+
     private static void assertNoPersistentTasks() throws IOException {
         Map<String, Object> clusterState = toMap(adminClient().performRequest(new Request("GET", "/_cluster/state")));
         List<?> tasks = (List<?>) XContentMapValues.extractValue("metadata.persistent_tasks.tasks", clusterState);

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

@@ -220,13 +220,15 @@ protected static void verifyAutoFollowMonitoring() throws IOException {
         Request request = new Request("GET", "/.monitoring-*/_search");
         request.setJsonEntity("""
             {"query": {"term": {"type": "ccr_auto_follow_stats"}}}""");
+        String responseEntity;
         Map<String, ?> response;
         try {
-            response = toMap(adminClient().performRequest(request));
+            responseEntity = EntityUtils.toString(adminClient().performRequest(request).getEntity());
+            response = toMap(responseEntity);
         } catch (ResponseException e) {
             throw new AssertionError("error while searching", e);
         }
-
+        assertNotNull(responseEntity);
         int numberOfSuccessfulFollowIndices = 0;
 
         List<?> hits = (List<?>) XContentMapValues.extractValue("hits.hits", response);
@@ -242,7 +244,11 @@ protected static void verifyAutoFollowMonitoring() throws IOException {
             numberOfSuccessfulFollowIndices = Math.max(numberOfSuccessfulFollowIndices, foundNumberOfOperationsReceived);
         }
 
-        assertThat(numberOfSuccessfulFollowIndices, greaterThanOrEqualTo(1));
+        assertThat(
+            "Unexpected number of followed indices [" + responseEntity + ']',
+            numberOfSuccessfulFollowIndices,
+            greaterThanOrEqualTo(1)
+        );
     }
 
     protected static Map<String, Object> toMap(Response response) throws IOException {