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// Copyright 2020 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.maintenance;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.config.provision.NodeType;
import org.junit.Before;
import org.junit.Test;
import java.io.IOException;
import java.nio.file.Paths;
import java.util.List;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
/**
* @author mgimle
*/
public class CapacityCheckerTest {
private CapacityCheckerTester tester;
@Before
public void setup() {
tester = new CapacityCheckerTester();
}
@Test
public void testWithRealData() throws IOException {
String path = "./src/test/resources/zookeeper_dump.json";
tester.cleanRepository();
tester.restoreNodeRepositoryFromJsonFile(Paths.get(path));
var failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
assertTrue(tester.nodeRepository.getNodes(NodeType.host).containsAll(failurePath.get().hostsCausingFailure));
}
@Test
public void testOvercommittedHosts() {
tester.createNodes(7, 4,
10, new NodeResources(-1, 10, 100, 1), 10,
0, new NodeResources(1, 10, 100, 1), 10);
int overcommittedHosts = tester.capacityChecker.findOvercommittedHosts().size();
assertEquals(tester.nodeRepository.getNodes(NodeType.host).size(), overcommittedHosts);
}
@Test
public void testEdgeCaseFailurePaths() {
tester.createNodes(1, 1,
0, new NodeResources(1, 10, 100, 1), 10,
0, new NodeResources(1, 10, 100, 1), 10);
var failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertFalse("Computing worst case host loss with no hosts should return an empty optional.", failurePath.isPresent());
// Odd edge case that should never be able to occur in prod
tester.createNodes(1, 10,
10, new NodeResources(10, 1000, 10000, 1), 100,
1, new NodeResources(10, 1000, 10000, 1), 100);
failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
assertTrue("Computing worst case host loss if all hosts have to be removed should result in an non-empty failureReason with empty nodes.",
failurePath.get().failureReason.tenant.isEmpty() && failurePath.get().failureReason.host.isEmpty());
assertEquals(tester.nodeRepository.getNodes(NodeType.host).size(), failurePath.get().hostsCausingFailure.size());
tester.createNodes(3, 30,
10, new NodeResources(0, 0, 10000, 1), 1000,
0, new NodeResources(0, 0, 0, 0), 0);
failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
if (failurePath.get().failureReason.tenant.isPresent()) {
var failureReasons = failurePath.get().failureReason.allocationFailures;
assertEquals("When there are multiple lacking resources, all failures are multipleReasonFailures",
failureReasons.size(), failureReasons.multipleReasonFailures().size());
assertEquals(0, failureReasons.singularReasonFailures().size());
} else fail();
}
@Test
public void testIpFailurePaths() {
tester.createNodes(1, 10,
10, new NodeResources(10, 1000, 10000, 1), 1,
10, new NodeResources(10, 1000, 10000, 1), 1);
var failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
if (failurePath.get().failureReason.tenant.isPresent()) {
var failureReasons = failurePath.get().failureReason.allocationFailures;
assertEquals("All failures should be due to hosts having a lack of available ip addresses.",
failureReasons.singularReasonFailures().insufficientAvailableIps(), failureReasons.size());
} else fail();
}
@Test
public void testNodeResourceFailurePaths() {
tester.createNodes(1, 10,
10, new NodeResources(1, 100, 1000, 1), 100,
10, new NodeResources(0, 100, 1000, 1), 100);
var failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
if (failurePath.get().failureReason.tenant.isPresent()) {
var failureReasons = failurePath.get().failureReason.allocationFailures;
assertEquals("All failures should be due to hosts lacking cpu cores.",
failureReasons.singularReasonFailures().insufficientVcpu(), failureReasons.size());
} else fail();
tester.createNodes(1, 10,
10, new NodeResources(10, 1, 1000, 1), 100,
10, new NodeResources(10, 0, 1000, 1), 100);
failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
if (failurePath.get().failureReason.tenant.isPresent()) {
var failureReasons = failurePath.get().failureReason.allocationFailures;
assertEquals("All failures should be due to hosts lacking memory.",
failureReasons.singularReasonFailures().insufficientMemoryGb(), failureReasons.size());
} else fail();
tester.createNodes(1, 10,
10, new NodeResources(10, 100, 10, 1), 100,
10, new NodeResources(10, 100, 0, 1), 100);
failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
if (failurePath.get().failureReason.tenant.isPresent()) {
var failureReasons = failurePath.get().failureReason.allocationFailures;
assertEquals("All failures should be due to hosts lacking disk space.",
failureReasons.singularReasonFailures().insufficientDiskGb(), failureReasons.size());
} else fail();
int emptyHostsWithSlowDisk = 10;
tester.createNodes(1, 10, List.of(new NodeResources(1, 10, 100, 1)),
10, new NodeResources(0, 0, 0, 0), 100,
10, new NodeResources(10, 1000, 10000, 1, NodeResources.DiskSpeed.slow), 100);
failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
if (failurePath.get().failureReason.tenant.isPresent()) {
var failureReasons = failurePath.get().failureReason.allocationFailures;
assertEquals("All empty hosts should be invalid due to having incompatible disk speed.",
failureReasons.singularReasonFailures().incompatibleDiskSpeed(), emptyHostsWithSlowDisk);
} else fail();
}
@Test
public void testParentHostPolicyIntegrityFailurePaths() {
tester.createNodes(1, 1,
10, new NodeResources(1, 100, 1000, 1), 100,
10, new NodeResources(10, 1000, 10000, 1), 100);
var failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
if (failurePath.get().failureReason.tenant.isPresent()) {
var failureReasons = failurePath.get().failureReason.allocationFailures;
assertEquals("With only one type of tenant, all failures should be due to violation of the parent host policy.",
failureReasons.singularReasonFailures().violatesParentHostPolicy(), failureReasons.size());
} else fail();
tester.createNodes(1, 2,
10, new NodeResources(10, 100, 1000, 1), 1,
0, new NodeResources(0, 0, 0, 0), 0);
failurePath = tester.capacityChecker.worstCaseHostLossLeadingToFailure();
assertTrue(failurePath.isPresent());
if (failurePath.get().failureReason.tenant.isPresent()) {
var failureReasons = failurePath.get().failureReason.allocationFailures;
assertNotEquals("Fewer distinct children than hosts should result in some parent host policy violations.",
failureReasons.size(), failureReasons.singularReasonFailures().violatesParentHostPolicy());
assertNotEquals(0, failureReasons.singularReasonFailures().violatesParentHostPolicy());
} else fail();
}
}
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