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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.maintenance;
import com.yahoo.collections.Pair;
import com.yahoo.metrics.simple.MetricReceiver;
import com.yahoo.system.ProcessExecuter;
import com.yahoo.test.ManualClock;
import com.yahoo.vespa.hosted.dockerapi.ContainerName;
import com.yahoo.vespa.hosted.dockerapi.metrics.MetricReceiverWrapper;
import com.yahoo.vespa.hosted.node.admin.ContainerNodeSpec;
import com.yahoo.vespa.hosted.node.admin.config.ConfigServerConfig;
import com.yahoo.vespa.hosted.node.admin.docker.DockerOperations;
import com.yahoo.vespa.hosted.node.admin.component.Environment;
import com.yahoo.vespa.hosted.node.admin.component.PathResolver;
import com.yahoo.vespa.hosted.provision.Node;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.time.Duration;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
/**
* @author dybis
*/
public class StorageMaintainerTest {
private final ManualClock clock = new ManualClock();
private final Environment environment = new Environment.Builder()
.configServerConfig(new ConfigServerConfig(new ConfigServerConfig.Builder()))
.region("us-east-1")
.environment("prod")
.system("main")
.pathResolver(new PathResolver())
.defaultFlavor("d-2-8-50")
.cloud("mycloud")
.build();
private final DockerOperations docker = mock(DockerOperations.class);
private final ProcessExecuter processExecuter = mock(ProcessExecuter.class);
private final StorageMaintainer storageMaintainer = new StorageMaintainer(docker, processExecuter,
new MetricReceiverWrapper(MetricReceiver.nullImplementation), environment, clock);
@Rule
public TemporaryFolder folder = new TemporaryFolder();
@Test
public void testDiskUsed() throws IOException, InterruptedException {
int writeSize = 10000;
writeNBytesToFile(folder.newFile(), writeSize);
long usedBytes = storageMaintainer.getDiskUsedInBytes(folder.getRoot().toPath());
if (usedBytes * 4 < writeSize || usedBytes > writeSize * 4)
fail("Used bytes is " + usedBytes + ", but wrote " + writeSize + " bytes, not even close.");
}
@Test
public void testNonExistingDiskUsed() throws IOException, InterruptedException {
long usedBytes = storageMaintainer.getDiskUsedInBytes(folder.getRoot().toPath().resolve("doesn't exist"));
assertEquals(0L, usedBytes);
}
@Test
public void testMaintenanceThrottlingAfterSuccessfulMaintenance() {
String hostname = "node-123.us-north-3.test.yahoo.com";
ContainerName containerName = ContainerName.fromHostname(hostname);
ContainerNodeSpec nodeSpec = new ContainerNodeSpec.Builder()
.hostname(hostname)
.nodeState(Node.State.ready)
.nodeType("tenants")
.nodeFlavor("docker")
.minCpuCores(1)
.minMainMemoryAvailableGb(1)
.minDiskAvailableGb(1)
.build();
try {
when(processExecuter.exec(any(String[].class))).thenReturn(new Pair<>(0, ""));
} catch (IOException ignored) { }
storageMaintainer.removeOldFilesFromNode(containerName);
verifyProcessExecuterCalled(1);
// Will not actually run maintenance job until an hour passes
storageMaintainer.removeOldFilesFromNode(containerName);
verifyProcessExecuterCalled(1);
// Coredump handler has its own throttler
storageMaintainer.handleCoreDumpsForContainer(containerName, nodeSpec, false);
verifyProcessExecuterCalled(2);
clock.advance(Duration.ofMinutes(61));
storageMaintainer.removeOldFilesFromNode(containerName);
verifyProcessExecuterCalled(3);
storageMaintainer.handleCoreDumpsForContainer(containerName, nodeSpec, false);
verifyProcessExecuterCalled(4);
storageMaintainer.handleCoreDumpsForContainer(containerName, nodeSpec, false);
verifyProcessExecuterCalled(4);
storageMaintainer.handleCoreDumpsForContainer(containerName, nodeSpec, true);
verifyProcessExecuterCalled(5);
storageMaintainer.handleCoreDumpsForContainer(containerName, nodeSpec, true);
verifyProcessExecuterCalled(6);
storageMaintainer.handleCoreDumpsForContainer(containerName, nodeSpec, false);
verifyProcessExecuterCalled(6);
// cleanupNodeStorage is unthrottled and it should reset previous times
storageMaintainer.cleanupNodeStorage(containerName, nodeSpec);
verifyProcessExecuterCalled(7);
storageMaintainer.cleanupNodeStorage(containerName, nodeSpec);
verifyProcessExecuterCalled(8);
storageMaintainer.handleCoreDumpsForContainer(containerName, nodeSpec, false);
verifyProcessExecuterCalled(9);
}
@Test
public void testMaintenanceThrottlingAfterFailedMaintenance() {
String hostname = "node-123.us-north-3.test.yahoo.com";
ContainerName containerName = ContainerName.fromHostname(hostname);
try {
when(processExecuter.exec(any(String[].class)))
.thenThrow(new RuntimeException("Something went wrong"))
.thenReturn(new Pair<>(0, ""));
} catch (IOException ignored) { }
try {
storageMaintainer.removeOldFilesFromNode(containerName);
fail("Maintenance job should've failed!");
} catch (RuntimeException ignored) { }
verifyProcessExecuterCalled(1);
// Maintenance job failed, we should be able to immediately re-run it
storageMaintainer.removeOldFilesFromNode(containerName);
verifyProcessExecuterCalled(2);
}
private static void writeNBytesToFile(File file, int nBytes) throws IOException {
Files.write(file.toPath(), new byte[nBytes]);
}
private void verifyProcessExecuterCalled(int times) {
try {
verify(processExecuter, times(times)).exec(any(String[].class));
} catch (IOException ignored) { }
}
}
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