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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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package org.apache.cassandra.sidecar.routes.tokenrange;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;
import com.google.common.collect.Range;
import com.google.common.util.concurrent.Uninterruptibles;
import org.junit.jupiter.api.extension.ExtendWith;
import io.vertx.junit5.VertxExtension;
import io.vertx.junit5.VertxTestContext;
import net.bytebuddy.ByteBuddy;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.dynamic.ClassFileLocator;
import net.bytebuddy.dynamic.TypeResolutionStrategy;
import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
import net.bytebuddy.implementation.MethodDelegation;
import net.bytebuddy.implementation.bind.annotation.SuperCall;
import net.bytebuddy.pool.TypePool;
import org.apache.cassandra.distributed.UpgradeableCluster;
import org.apache.cassandra.testing.CassandraIntegrationTest;
import org.apache.cassandra.testing.ConfigurableCassandraTestContext;
import org.apache.cassandra.utils.Shared;
import static net.bytebuddy.matcher.ElementMatchers.named;
/**
* Multi-DC Cluster shrink scenarios integration tests for token range replica mapping endpoint with the in-jvm
* dtest framework.
*
* Note: Some related test classes are broken down to have a single test case to parallelize test execution and
* therefore limit the instance size required to run the tests from CircleCI as the in-jvm-dtests tests are memory bound
*/
@ExtendWith(VertxExtension.class)
class LeavingTestMultiDCHalveCluster extends LeavingBaseTest
{
@CassandraIntegrationTest(nodesPerDc = 6, numDcs = 2, network = true, gossip = true, buildCluster = false)
void retrieveMappingMultiDCHalveClusterSize(VertxTestContext context,
ConfigurableCassandraTestContext cassandraTestContext) throws Exception
{
BBHelperHalveClusterMultiDC.reset();
int leavingNodesPerDC = 3;
UpgradeableCluster cluster = getMultiDCCluster(BBHelperHalveClusterMultiDC::install, cassandraTestContext);
Map<String, Map<Range<BigInteger>, List<String>>> expectedRangeMappings
= generateExpectedRangeHalveClusterSizeMultiDC();
runLeavingTestScenario(context,
leavingNodesPerDC,
BBHelperHalveClusterMultiDC.transientStateStart,
BBHelperHalveClusterMultiDC.transientStateEnd,
cluster,
expectedRangeMappings);
}
/**
* Generates expected token range and replica mappings specific to the test case involving a 12 node cluster
* across 2 DCs with the last 6 nodes leaving the cluster (3 per DC)
* <p>
* Expected ranges are generated by adding RF replicas per range in increasing order. The replica-sets in subsequent
* ranges cascade with the next range excluding the first replica, and including the next replica from the nodes.
* eg.
* Range 1 - A, B, C
* Range 2 - B, C, D
* <p>
* In a multi-DC scenario, a single range will have nodes from both DCs. The replicas are grouped by DC here
* to allow per-DC validation as returned from the sidecar endpoint.
* <p>
* Ranges that including leaving node replicas will have [RF + no. leaving nodes in replica-set] replicas with
* the new replicas being the existing nodes in ring-order.
* <p>
* eg.
* Range 1 - A, B, C
* Range 2 - B, C, D (with D being the leaving node)
* Expected Range 2 - B, C, D, A (With A taking over the range of the leaving node)
*/
private Map<String, Map<Range<BigInteger>, List<String>>> generateExpectedRangeHalveClusterSizeMultiDC()
{
List<Range<BigInteger>> expectedRanges = generateExpectedRanges();
Map<Range<BigInteger>, List<String>> dc1Mapping = new HashMap<>();
Map<Range<BigInteger>, List<String>> dc2Mapping = new HashMap<>();
dc1Mapping.put(expectedRanges.get(0), Arrays.asList("127.0.0.1", "127.0.0.3", "127.0.0.5"));
dc2Mapping.put(expectedRanges.get(0), Arrays.asList("127.0.0.2", "127.0.0.4", "127.0.0.6"));
dc1Mapping.put(expectedRanges.get(1),
Arrays.asList("127.0.0.3", "127.0.0.5", "127.0.0.7", "127.0.0.1"));
dc2Mapping.put(expectedRanges.get(1), Arrays.asList("127.0.0.2", "127.0.0.4", "127.0.0.6"));
dc1Mapping.put(expectedRanges.get(2),
Arrays.asList("127.0.0.3", "127.0.0.5", "127.0.0.7", "127.0.0.1"));
dc2Mapping.put(expectedRanges.get(2),
Arrays.asList("127.0.0.4", "127.0.0.6", "127.0.0.8", "127.0.0.2"));
dc1Mapping.put(
expectedRanges.get(3),
Arrays.asList("127.0.0.5", "127.0.0.7", "127.0.0.9", "127.0.0.1", "127.0.0.3"));
dc2Mapping.put(expectedRanges.get(3),
Arrays.asList("127.0.0.4", "127.0.0.6", "127.0.0.8", "127.0.0.2"));
dc1Mapping.put(
expectedRanges.get(4),
Arrays.asList("127.0.0.5", "127.0.0.7", "127.0.0.9", "127.0.0.1", "127.0.0.3"));
dc2Mapping.put(
expectedRanges.get(4),
Arrays.asList("127.0.0.6", "127.0.0.8", "127.0.0.10", "127.0.0.2", "127.0.0.4"));
dc1Mapping.put(
expectedRanges.get(5),
Arrays.asList("127.0.0.7", "127.0.0.9", "127.0.0.11", "127.0.0.1", "127.0.0.3",
"127.0.0.5"));
dc2Mapping.put(
expectedRanges.get(5),
Arrays.asList("127.0.0.6", "127.0.0.8", "127.0.0.10", "127.0.0.2", "127.0.0.4"));
dc1Mapping.put(
expectedRanges.get(6),
Arrays.asList("127.0.0.7", "127.0.0.9", "127.0.0.11", "127.0.0.1", "127.0.0.3",
"127.0.0.5"));
dc2Mapping.put(
expectedRanges.get(6),
Arrays.asList("127.0.0.8", "127.0.0.10", "127.0.0.12", "127.0.0.2", "127.0.0.4",
"127.0.0.6"));
dc1Mapping.put(
expectedRanges.get(7),
Arrays.asList("127.0.0.9", "127.0.0.11", "127.0.0.1", "127.0.0.3", "127.0.0.5"));
dc2Mapping.put(
expectedRanges.get(7),
Arrays.asList("127.0.0.8", "127.0.0.10", "127.0.0.12", "127.0.0.2", "127.0.0.4",
"127.0.0.6"));
dc1Mapping.put(
expectedRanges.get(8),
Arrays.asList("127.0.0.9", "127.0.0.11", "127.0.0.1", "127.0.0.3", "127.0.0.5"));
dc2Mapping.put(
expectedRanges.get(8),
Arrays.asList("127.0.0.10", "127.0.0.12", "127.0.0.2", "127.0.0.4", "127.0.0.6"));
dc1Mapping.put(expectedRanges.get(9),
Arrays.asList("127.0.0.11", "127.0.0.1", "127.0.0.3", "127.0.0.5"));
dc2Mapping.put(
expectedRanges.get(9),
Arrays.asList("127.0.0.10", "127.0.0.12", "127.0.0.2", "127.0.0.4", "127.0.0.6"));
dc1Mapping.put(expectedRanges.get(10),
Arrays.asList("127.0.0.11", "127.0.0.1", "127.0.0.3", "127.0.0.5"));
dc2Mapping.put(expectedRanges.get(10),
Arrays.asList("127.0.0.12", "127.0.0.2", "127.0.0.4", "127.0.0.6"));
dc1Mapping.put(expectedRanges.get(11), Arrays.asList("127.0.0.1", "127.0.0.3", "127.0.0.5"));
dc2Mapping.put(expectedRanges.get(11),
Arrays.asList("127.0.0.12", "127.0.0.2", "127.0.0.4", "127.0.0.6"));
dc1Mapping.put(expectedRanges.get(12), Arrays.asList("127.0.0.1", "127.0.0.3", "127.0.0.5"));
dc2Mapping.put(expectedRanges.get(12), Arrays.asList("127.0.0.2", "127.0.0.4", "127.0.0.6"));
return new HashMap<String, Map<Range<BigInteger>, List<String>>>()
{
{
put("datacenter1", dc1Mapping);
put("datacenter2", dc2Mapping);
}
};
}
/**
* ByteBuddy helper for halve cluster size with multi-DC
*/
@Shared
public static class BBHelperHalveClusterMultiDC
{
static CountDownLatch transientStateStart = new CountDownLatch(6);
static CountDownLatch transientStateEnd = new CountDownLatch(6);
public static void install(ClassLoader cl, Integer nodeNumber)
{
// Test case involves halving the size of a 12 node cluster (6 per DC)
// We intercept the shutdown of the removed nodes (7-12) to validate token ranges
if (nodeNumber > 6)
{
TypePool typePool = TypePool.Default.of(cl);
TypeDescription description = typePool.describe("org.apache.cassandra.service.StorageService")
.resolve();
new ByteBuddy().rebase(description, ClassFileLocator.ForClassLoader.of(cl))
.method(named("unbootstrap"))
.intercept(MethodDelegation.to(BBHelperHalveClusterMultiDC.class))
// Defer class loading until all dependencies are loaded
.make(TypeResolutionStrategy.Lazy.INSTANCE, typePool)
.load(cl, ClassLoadingStrategy.Default.INJECTION);
}
}
@SuppressWarnings("unused")
public static void unbootstrap(@SuperCall Callable<?> orig) throws Exception
{
transientStateStart.countDown();
Uninterruptibles.awaitUninterruptibly(transientStateEnd);
orig.call();
}
public static void reset()
{
transientStateStart = new CountDownLatch(6);
transientStateEnd = new CountDownLatch(6);
}
}
}