Fix test for single Node and consume numNodes

build.gradle

@@ -931,6 +931,9 @@ task integTestRemote (type: RestIntegTestTask) {
         systemProperty "tests.cluster.leaderCluster.security_enabled", System.getProperty("security_enabled")
 
         nonInputProperties.systemProperty('tests.integTestRemote', "true")
+        var numberOfNodes = findProperty('numNodes') as Integer
+        systemProperty "tests.cluster.followCluster.total_nodes", "${-> numberOfNodes.toString()}"
+        systemProperty "tests.cluster.leaderCluster.total_nodes", "${-> numberOfNodes.toString()}"
         systemProperty "build.dir", "${buildDir}"
 
     }

src/test/kotlin/org/opensearch/replication/MultiClusterRestTestCase.kt

@@ -119,7 +119,6 @@ abstract class MultiClusterRestTestCase : OpenSearchTestCase() {
         lateinit var testClusters : Map<String, TestCluster>
         var isSecurityPropertyEnabled = false
         var forceInitSecurityConfiguration = false
-        var isMultiNodeClusterConfiguration = true
 
         internal fun createTestCluster(configuration: ClusterConfiguration) : TestCluster {
             return createTestCluster(configuration.clusterName, configuration.preserveSnapshots, configuration.preserveIndices,
@@ -132,7 +131,6 @@ abstract class MultiClusterRestTestCase : OpenSearchTestCase() {
             val httpHostsProp = systemProperties.get("tests.cluster.${cluster}.http_hosts") as String?
             val transportHostsProp = systemProperties.get("tests.cluster.${cluster}.transport_hosts") as String?
             val securityEnabled = systemProperties.get("tests.cluster.${cluster}.security_enabled") as String?
-            val totalNodes = systemProperties.get("tests.cluster.${cluster}.total_nodes") as String?
 
             requireNotNull(httpHostsProp) { "Missing http hosts property for cluster: $cluster."}
             requireNotNull(transportHostsProp) { "Missing transport hosts property for cluster: $cluster."}
@@ -144,9 +142,6 @@ abstract class MultiClusterRestTestCase : OpenSearchTestCase() {
                 isSecurityPropertyEnabled = true
             }
 
-            if(totalNodes != null && totalNodes < "2") {
-                isMultiNodeClusterConfiguration = false
-            }
 
             forceInitSecurityConfiguration = isSecurityPropertyEnabled && initSecurityConfiguration
 
@@ -666,6 +661,19 @@ abstract class MultiClusterRestTestCase : OpenSearchTestCase() {
         return integTestRemote.equals("true")
     }
 
+    protected fun isMultiNodeClusterConfiguration(leaderCluster: String, followerCluster: String): Boolean{
+        val systemProperties = BootstrapInfo.getSystemProperties()
+        val totalLeaderNodes = systemProperties.get("tests.cluster.${leaderCluster}.total_nodes") as String
+        val totalFollowerNodes = systemProperties.get("tests.cluster.${followerCluster}.total_nodes") as String
+
+        assertNotNull(totalLeaderNodes)
+        assertNotNull(totalFollowerNodes)
+        if(totalLeaderNodes < "2" ||  totalFollowerNodes < "2" ) {
+            return false
+        }
+        return true
+    }
+
     protected fun docCount(cluster: RestHighLevelClient, indexName: String) : Int {
         val persistentConnectionRequest = Request("GET", "/$indexName/_search?pretty&q=*")
 

src/test/kotlin/org/opensearch/replication/ReplicationHelpers.kt

@@ -55,6 +55,9 @@ const val INDEX_TASK_CANCELLATION_REASON = "AutoPaused: Index replication task w
 const val STATUS_REASON_USER_INITIATED = "User initiated"
 const val STATUS_REASON_SHARD_TASK_CANCELLED = "Shard task killed or cancelled."
 const val STATUS_REASON_INDEX_NOT_FOUND = "no such index"
+const val ANALYZERS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS = "Analysers are not accessible when run on remote clusters."
+const val SNAPSHOTS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS = "Snapshots are not accessible when run on remote clusters."
+const val REROUTE_TESTS_NOT_ELIGIBLE_FOR_SINGLE_NODE_CLUSTER = "Reroute not eligible for single node clusters"
 
 
 fun RestHighLevelClient.startReplication(request: StartReplicationRequest,

src/test/kotlin/org/opensearch/replication/integ/rest/ClusterRerouteFollowerIT.kt

@@ -4,7 +4,7 @@ import org.opensearch.replication.MultiClusterRestTestCase
 import org.opensearch.replication.MultiClusterAnnotations
 import org.opensearch.replication.StartReplicationRequest
 import org.opensearch.replication.startReplication
-import org.opensearch.replication.stopReplication
+import org.opensearch.replication.REROUTE_TESTS_NOT_ELIGIBLE_FOR_SINGLE_NODE_CLUSTER
 import org.assertj.core.api.Assertions
 import org.opensearch.client.RequestOptions
 import org.opensearch.client.indices.CreateIndexRequest
@@ -25,7 +25,7 @@ class ClusterRerouteFollowerIT : MultiClusterRestTestCase() {
 
     @Before
     fun beforeTest() {
-        Assume.assumeTrue(isMultiNodeClusterConfiguration)
+        Assume.assumeTrue(REROUTE_TESTS_NOT_ELIGIBLE_FOR_SINGLE_NODE_CLUSTER, isMultiNodeClusterConfiguration(LEADER, FOLLOWER))
     }
 
     fun `test replication works after rerouting a shard from one node to another in follower cluster`() {

src/test/kotlin/org/opensearch/replication/integ/rest/ClusterRerouteLeaderIT.kt

@@ -17,6 +17,7 @@ import org.junit.Assert
 import org.junit.Assume
 import org.junit.Before
 import org.junit.Ignore
+import org.opensearch.replication.REROUTE_TESTS_NOT_ELIGIBLE_FOR_SINGLE_NODE_CLUSTER
 import java.util.concurrent.TimeUnit
 
 @MultiClusterAnnotations.ClusterConfigurations(
@@ -30,7 +31,7 @@ class ClusterRerouteLeaderIT : MultiClusterRestTestCase() {
 
     @Before
     fun beforeTest() {
-        Assume.assumeTrue(isMultiNodeClusterConfiguration)
+        Assume.assumeTrue(REROUTE_TESTS_NOT_ELIGIBLE_FOR_SINGLE_NODE_CLUSTER, isMultiNodeClusterConfiguration(LEADER, FOLLOWER),)
     }
 
     fun `test replication works after rerouting a shard from one node to another in leader cluster`() {

src/test/kotlin/org/opensearch/replication/integ/rest/ResumeReplicationIT.kt

@@ -40,9 +40,10 @@ import org.opensearch.client.indices.GetMappingsRequest
 import org.opensearch.common.io.PathUtils
 import org.opensearch.common.settings.Settings
 import org.junit.Assert
+import org.junit.Assume
 import java.nio.file.Files
 import java.util.concurrent.TimeUnit
-import org.opensearch.bootstrap.BootstrapInfo
+import org.opensearch.replication.ANALYZERS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS
 
 @MultiClusterAnnotations.ClusterConfigurations(
         MultiClusterAnnotations.ClusterConfiguration(clusterName = LEADER),
@@ -165,9 +166,7 @@ class ResumeReplicationIT: MultiClusterRestTestCase() {
 
     fun `test that replication fails to resume when custom analyser is not present in follower`() {
 
-        if(checkifIntegTestRemote()){
-            return;
-        }
+        Assume.assumeFalse(ANALYZERS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS, checkifIntegTestRemote())
 
         val synonyms = javaClass.getResourceAsStream("/analyzers/synonyms.txt")
         val config = PathUtils.get(buildDir, leaderClusterPath, "config")
@@ -202,9 +201,7 @@ class ResumeReplicationIT: MultiClusterRestTestCase() {
 
     fun `test that replication resumes when custom analyser is present in follower`() {
 
-        if(checkifIntegTestRemote()){
-            return;
-        }
+        Assume.assumeFalse(ANALYZERS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS, checkifIntegTestRemote())
 
         val synonyms = javaClass.getResourceAsStream("/analyzers/synonyms.txt")
         val config = PathUtils.get(buildDir, leaderClusterPath, "config")
@@ -246,9 +243,7 @@ class ResumeReplicationIT: MultiClusterRestTestCase() {
 
     fun `test that replication resumes when custom analyser is overridden and present in follower`() {
 
-        if(checkifIntegTestRemote()){
-            return;
-        }
+        Assume.assumeFalse(ANALYZERS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS, checkifIntegTestRemote())
 
         val synonyms = javaClass.getResourceAsStream("/analyzers/synonyms.txt")
         val config = PathUtils.get(buildDir, leaderClusterPath, "config")

src/test/kotlin/org/opensearch/replication/integ/rest/StartReplicationIT.kt

@@ -25,6 +25,8 @@ import org.opensearch.replication.resumeReplication
 import org.opensearch.replication.`validate paused status response due to leader index deleted`
 import org.opensearch.replication.`validate status syncing response`
 import org.opensearch.replication.startReplication
+import org.opensearch.replication.ANALYZERS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS
+import org.opensearch.replication.SNAPSHOTS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS
 import org.opensearch.replication.stopReplication
 import org.opensearch.replication.updateReplication
 import org.apache.hc.core5.http.HttpStatus
@@ -66,7 +68,7 @@ import org.opensearch.index.mapper.MapperService
 import org.opensearch.repositories.fs.FsRepository
 import org.opensearch.test.OpenSearchTestCase.assertBusy
 import org.junit.Assert
-import org.opensearch.cluster.metadata.AliasMetadata
+import org.junit.Assume
 import org.opensearch.core.xcontent.DeprecationHandler
 import org.opensearch.core.xcontent.NamedXContentRegistry
 import org.opensearch.replication.ReplicationPlugin.Companion.REPLICATION_INDEX_TRANSLOG_PRUNING_ENABLED_SETTING
@@ -585,9 +587,7 @@ class StartReplicationIT: MultiClusterRestTestCase() {
 
     fun `test that replication fails to start when custom analyser is not present in follower`() {
 
-        if(checkifIntegTestRemote()){
-            return;
-        }
+        Assume.assumeFalse(ANALYZERS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS, checkifIntegTestRemote())
 
         val synonyms = javaClass.getResourceAsStream("/analyzers/synonyms.txt")
         val config = PathUtils.get(buildDir, leaderClusterPath, "config")
@@ -620,9 +620,7 @@ class StartReplicationIT: MultiClusterRestTestCase() {
 
     fun `test that replication starts successfully when custom analyser is present in follower`() {
 
-        if(checkifIntegTestRemote()){
-            return;
-        }
+        Assume.assumeFalse(ANALYZERS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS, checkifIntegTestRemote())
 
         val synonyms = javaClass.getResourceAsStream("/analyzers/synonyms.txt")
         val leaderConfig = PathUtils.get(buildDir, leaderClusterPath, "config")
@@ -662,9 +660,7 @@ class StartReplicationIT: MultiClusterRestTestCase() {
 
     fun `test that replication starts successfully when custom analyser is overridden and present in follower`() {
 
-        if(checkifIntegTestRemote()){
-            return;
-        }
+        Assume.assumeFalse(ANALYZERS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS, checkifIntegTestRemote())
 
         val synonyms = javaClass.getResourceAsStream("/analyzers/synonyms.txt")
         val leaderConfig = PathUtils.get(buildDir, leaderClusterPath, "config")
@@ -801,9 +797,7 @@ class StartReplicationIT: MultiClusterRestTestCase() {
 
     fun `test that snapshot on leader does not affect replication during bootstrap`() {
 
-        if(checkifIntegTestRemote()){
-            return;
-        }
+        Assume.assumeFalse(SNAPSHOTS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS,checkifIntegTestRemote())
 
         val settings = Settings.builder()
             .put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 20)
@@ -1147,6 +1141,10 @@ class StartReplicationIT: MultiClusterRestTestCase() {
     }
 
     fun `test that wait_for_active_shards setting is updated on follower through start replication api`() {
+
+        Assume.assumeTrue("Ignore this test if clusters dont have multiple nodes as this test reles on wait_for_active_shards",
+            isMultiNodeClusterConfiguration(LEADER, FOLLOWER))
+
         val followerClient = getClientForCluster(FOLLOWER)
         val leaderClient = getClientForCluster(LEADER)
 

src/test/kotlin/org/opensearch/replication/integ/rest/StopReplicationIT.kt

@@ -24,6 +24,7 @@ import org.apache.hc.core5.http.io.entity.EntityUtils
 import org.assertj.core.api.Assertions.assertThat
 import org.assertj.core.api.Assertions.assertThatThrownBy
 import org.junit.Assert
+import org.junit.Assume
 import org.opensearch.OpenSearchStatusException
 import org.opensearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest
 import org.opensearch.action.admin.cluster.snapshots.create.CreateSnapshotRequest
@@ -40,6 +41,7 @@ import org.opensearch.cluster.metadata.IndexMetadata
 import org.opensearch.common.settings.Settings
 import org.opensearch.common.unit.TimeValue
 import org.opensearch.index.mapper.MapperService
+import org.opensearch.replication.SNAPSHOTS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS
 import java.util.Random
 import java.util.concurrent.TimeUnit
 
@@ -243,9 +245,7 @@ class StopReplicationIT: MultiClusterRestTestCase() {
 
     fun `test stop replication with stale replication settings at leader cluster`() {
 
-        if(checkifIntegTestRemote()){
-            return;
-        }
+        Assume.assumeFalse(SNAPSHOTS_NOT_ACCESSIBLE_FOR_REMOTE_CLUSTERS, checkifIntegTestRemote())
 
         val followerClient = getClientForCluster(FOLLOWER)
         val leaderClient = getClientForCluster(LEADER)