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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.dockerapi;
import org.apache.commons.io.IOUtils;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import java.io.IOException;
import java.net.InetAddress;
import java.net.URL;
import java.util.Optional;
import java.util.concurrent.ExecutionException;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.junit.Assume.assumeTrue;
/**
* Requires docker daemon, see {@link com.yahoo.vespa.hosted.dockerapi.DockerTestUtils} for more details.
*
* @author freva
* @author dybdahl
*/
public class DockerTest {
private DockerImpl docker;
private static final DockerImage dockerImage = new DockerImage("simple-ipv6-server:Dockerfile");
private static final String MANAGER_NAME = "docker-test";
// It is ignored since it is a bit slow and unstable, at least on Mac.
@Ignore
@Test
public void testDockerImagePullDelete() throws ExecutionException, InterruptedException {
DockerImage dockerImage = new DockerImage("busybox:1.24.0");
// Pull the image and wait for the pull to complete
docker.pullImageAsync(dockerImage).get();
assertTrue("Failed to download " + dockerImage.asString() + " image", docker.imageIsDownloaded(dockerImage));
// Remove the image
docker.deleteImage(dockerImage);
assertFalse("Failed to delete " + dockerImage.asString() + " image", docker.imageIsDownloaded(dockerImage));
}
// Ignored because the test is very slow (several minutes) when swap is enabled, to disable: (Linux)
// $ sudo swapoff -a
@Ignore
@Test
public void testOutOfMemoryDoesNotAffectOtherContainers() throws InterruptedException, ExecutionException, IOException {
String hostName1 = "docker10.test.yahoo.com";
String hostName2 = "docker11.test.yahoo.com";
ContainerName containerName1 = new ContainerName("docker-test-1");
ContainerName containerName2 = new ContainerName("docker-test-2");
InetAddress inetAddress1 = InetAddress.getByName("172.18.10.10");
InetAddress inetAddress2 = InetAddress.getByName("172.18.10.11");
docker.createContainerCommand(dockerImage, containerName1, hostName1)
.withManagedBy(MANAGER_NAME)
.withNetworkMode(DockerImpl.DOCKER_CUSTOM_MACVLAN_NETWORK_NAME)
.withIpAddress(inetAddress1)
.withMemoryInMb(100).create();
docker.startContainer(containerName1);
docker.createContainerCommand(dockerImage, containerName2, hostName2)
.withManagedBy(MANAGER_NAME)
.withNetworkMode(DockerImpl.DOCKER_CUSTOM_MACVLAN_NETWORK_NAME)
.withIpAddress(inetAddress2)
.withMemoryInMb(100).create();
docker.startContainer(containerName2);
// 137 = 128 + 9 = kill -9 (SIGKILL), doesn't need to be run as "root", but "yahoo" does not exist in this basic image
assertThat(docker.executeInContainerAsRoot(containerName2, "python", "/pysrc/fillmem.py", "90").getExitStatus(), is(137));
// Verify that both HTTP servers are still up
testReachabilityFromHost("http://" + inetAddress1.getHostAddress() + "/ping");
testReachabilityFromHost("http://" + inetAddress2.getHostAddress() + "/ping");
docker.stopContainer(containerName1);
docker.deleteContainer(containerName1);
docker.stopContainer(containerName2);
docker.deleteContainer(containerName2);
}
@Test
public void testContainerCycle() throws IOException, InterruptedException, ExecutionException {
final ContainerName containerName = new ContainerName("docker-test-foo");
final String containerHostname = "hostName1";
docker.createContainerCommand(dockerImage, containerName, containerHostname).withManagedBy(MANAGER_NAME).create();
Optional<Container> container = docker.getContainer(containerName);
assertTrue(container.isPresent());
assertEquals(container.get().state, Container.State.CREATED);
docker.startContainer(containerName);
container = docker.getContainer(containerName);
assertTrue(container.isPresent());
assertEquals(container.get().state, Container.State.RUNNING);
docker.dockerClient.pauseContainerCmd(containerName.asString()).exec();
container = docker.getContainer(containerName);
assertTrue(container.isPresent());
assertEquals(container.get().state, Container.State.PAUSED);
docker.dockerClient.unpauseContainerCmd(containerName.asString()).exec();
docker.stopContainer(containerName);
container = docker.getContainer(containerName);
assertTrue(container.isPresent());
assertEquals(container.get().state, Container.State.EXITED);
docker.deleteContainer(containerName);
assertThat(docker.listAllContainersManagedBy(MANAGER_NAME).isEmpty(), is(true));
}
/**
* Test the expected behavior for exec when it times out - it should throw an exception when it times out,
* and before the process completes.
*
* The test timeout value is set quite high to avoid noise if screwdriver is slow but lower than the process time.
*/
@Test(expected = DockerExecTimeoutException.class, timeout = 2000)
public void testContainerExecHounorsTimeout() throws IOException, InterruptedException, ExecutionException {
final ContainerName containerName = new ContainerName("docker-test-foo");
final String containerHostname = "hostName1";
docker.createContainerCommand(dockerImage, containerName, containerHostname).withManagedBy(MANAGER_NAME).create();
docker.startContainer(containerName);
docker.executeInContainerAsRoot(containerName, 1L, "sh", "-c", "sleep 5");
}
/**
* Test the expected behavior for exec that completes before specified timeout - it should return when the process finishes and not
* wait for the timeout. Some previous tests indicated that this was not behaving correctly.
*
* No timeout implies infinite timeout.
*
* The test timeout value is set quite high to avoid noise if screwdriver is slow
*/
@Test(timeout = 4000)
public void testContainerExecDoesNotBlockUntilTimeoutWhenCommandFinishesBeforeTimeout() throws IOException, InterruptedException, ExecutionException {
final ContainerName containerName = new ContainerName("docker-test-foo");
final String containerHostname = "hostName1";
docker.createContainerCommand(dockerImage, containerName, containerHostname).withManagedBy(MANAGER_NAME).create();
docker.startContainer(containerName);
docker.executeInContainerAsRoot(containerName, 2L, "sh", "-c", "echo hei");
// Also test that this is the behavoir when not specifying timeout
docker.executeInContainerAsRoot(containerName,"sh", "-c", "echo hei");
}
@Test
public void testDockerNetworking() throws InterruptedException, ExecutionException, IOException {
String hostName1 = "docker10.test.yahoo.com";
String hostName2 = "docker11.test.yahoo.com";
ContainerName containerName1 = new ContainerName("docker-test-1");
ContainerName containerName2 = new ContainerName("docker-test-2");
InetAddress inetAddress1 = InetAddress.getByName("172.18.10.10");
InetAddress inetAddress2 = InetAddress.getByName("172.18.10.11");
docker.createContainerCommand(dockerImage, containerName1, hostName1).withManagedBy(MANAGER_NAME)
.withNetworkMode(DockerImpl.DOCKER_CUSTOM_MACVLAN_NETWORK_NAME).withIpAddress(inetAddress1).create();
docker.startContainer(containerName1);
docker.createContainerCommand(dockerImage, containerName2, hostName2).withManagedBy(MANAGER_NAME)
.withNetworkMode(DockerImpl.DOCKER_CUSTOM_MACVLAN_NETWORK_NAME).withIpAddress(inetAddress2).create();
docker.startContainer(containerName2);
testReachabilityFromHost("http://" + inetAddress1.getHostAddress() + "/ping");
testReachabilityFromHost("http://" + inetAddress2.getHostAddress() + "/ping");
String[] curlFromNodeToNode = new String[]{"curl", "-g", "http://" + inetAddress2.getHostAddress() + "/ping"};
ProcessResult result = docker.executeInContainerAsRoot(containerName1, curlFromNodeToNode);
assertThat("Could not reach " + containerName2.asString() + " from " + containerName1.asString(),
result.getOutput(), is("pong\n"));
docker.stopContainer(containerName1);
docker.deleteContainer(containerName1);
docker.stopContainer(containerName2);
docker.deleteContainer(containerName2);
}
@Before
public void setup() throws InterruptedException, ExecutionException, IOException {
if (docker == null) {
assumeTrue(DockerTestUtils.dockerDaemonIsPresent());
docker = DockerTestUtils.getDocker();
DockerTestUtils.buildSimpleHttpServerDockerImage(docker, dockerImage);
}
// Clean up any non deleted containers from previous tests
docker.getAllContainersManagedBy(MANAGER_NAME).forEach(container -> {
if (container.state.isRunning()) docker.stopContainer(container.name);
docker.deleteContainer(container.name);
});
}
private void testReachabilityFromHost(String target) throws IOException, InterruptedException {
URL url = new URL(target);
String containerServer = IOUtils.toString(url.openStream());
assertThat(containerServer, is("pong\n"));
}
}
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