org.apache.pulsar.tests.DockerUtils.java Source code

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * 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 distributed under the License is distributed on an
 * "AS IS" BASIS, 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.
 */
package org.apache.pulsar.tests;

import com.github.dockerjava.api.DockerClient;
import com.github.dockerjava.api.async.ResultCallback;
import com.github.dockerjava.api.command.InspectExecResponse;
import com.github.dockerjava.api.model.Frame;
import com.github.dockerjava.api.model.ContainerNetwork;

import java.io.Closeable;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DockerUtils {
    private static final Logger LOG = LoggerFactory.getLogger(DockerUtils.class);

    private static File getTargetDirectory(String containerId) {
        String base = System.getProperty("maven.buildDirectory");
        if (base == null) {
            base = "target";
        }
        File directory = new File(base + "/container-logs/" + containerId);
        if (!directory.exists() && !directory.mkdirs()) {
            LOG.error("Error creating directory for container logs.");
        }
        return directory;
    }

    public static void dumpContainerLogToTarget(DockerClient docker, String containerId) {
        File output = new File(getTargetDirectory(containerId), "docker.log");
        try (FileOutputStream os = new FileOutputStream(output)) {
            CompletableFuture<Boolean> future = new CompletableFuture<>();
            docker.logContainerCmd(containerId).withStdOut(true).withStdErr(true).withTimestamps(true)
                    .exec(new ResultCallback<Frame>() {
                        @Override
                        public void close() {
                        }

                        @Override
                        public void onStart(Closeable closeable) {
                        }

                        @Override
                        public void onNext(Frame object) {
                            try {
                                os.write(object.getPayload());
                            } catch (IOException e) {
                                onError(e);
                            }
                        }

                        @Override
                        public void onError(Throwable throwable) {
                            future.completeExceptionally(throwable);
                        }

                        @Override
                        public void onComplete() {
                            future.complete(true);
                        }
                    });
            future.get();
        } catch (RuntimeException | ExecutionException | IOException e) {
            LOG.error("Error dumping log for {}", containerId, e);
        } catch (InterruptedException ie) {
            Thread.currentThread().interrupt();
            LOG.info("Interrupted dumping log from container {}", containerId, ie);
        }
    }

    public static void dumpContainerLogDirToTarget(DockerClient docker, String containerId, String path) {
        final int READ_BLOCK_SIZE = 10000;

        try (InputStream dockerStream = docker.copyArchiveFromContainerCmd(containerId, path).exec();
                TarArchiveInputStream stream = new TarArchiveInputStream(dockerStream)) {
            TarArchiveEntry entry = stream.getNextTarEntry();
            while (entry != null) {
                if (entry.isFile()) {
                    File output = new File(getTargetDirectory(containerId), entry.getName().replace("/", "-"));
                    try (FileOutputStream os = new FileOutputStream(output)) {
                        byte[] block = new byte[READ_BLOCK_SIZE];
                        int read = stream.read(block, 0, READ_BLOCK_SIZE);
                        while (read > -1) {
                            os.write(block, 0, read);
                            read = stream.read(block, 0, READ_BLOCK_SIZE);
                        }
                    }
                }
                entry = stream.getNextTarEntry();
            }
        } catch (RuntimeException | IOException e) {
            LOG.error("Error reading logs from container {}", containerId, e);
        }
    }

    public static String getContainerIP(DockerClient docker, String containerId) {
        for (Map.Entry<String, ContainerNetwork> e : docker.inspectContainerCmd(containerId).exec()
                .getNetworkSettings().getNetworks().entrySet()) {
            return e.getValue().getIpAddress();
        }
        throw new IllegalArgumentException("Container " + containerId + " has no networks");
    }

    public static String getContainerHostname(DockerClient docker, String containerId) {
        return runCommand(docker, containerId, "hostname").trim();
    }

    public static String runCommand(DockerClient docker, String containerId, String... cmd) {
        CompletableFuture<Boolean> future = new CompletableFuture<>();
        String execid = docker.execCreateCmd(containerId).withCmd(cmd).withAttachStderr(true).withAttachStdout(true)
                .exec().getId();
        String cmdString = Arrays.stream(cmd).collect(Collectors.joining(" "));
        StringBuffer output = new StringBuffer();
        docker.execStartCmd(execid).withDetach(false).exec(new ResultCallback<Frame>() {
            @Override
            public void close() {
            }

            @Override
            public void onStart(Closeable closeable) {
                LOG.info("DOCKER.exec({}:{}): Executing...", containerId, cmdString);
            }

            @Override
            public void onNext(Frame object) {
                LOG.info("DOCKER.exec({}:{}): {}", containerId, cmdString, object);
                output.append(new String(object.getPayload()));
            }

            @Override
            public void onError(Throwable throwable) {
                future.completeExceptionally(throwable);
            }

            @Override
            public void onComplete() {
                LOG.info("DOCKER.exec({}:{}): Done", containerId, cmdString);
                future.complete(true);
            }
        });
        future.join();

        InspectExecResponse resp = docker.inspectExecCmd(execid).exec();
        while (resp.isRunning()) {
            try {
                Thread.sleep(200);
            } catch (InterruptedException ie) {
                Thread.currentThread().interrupt();
                throw new RuntimeException(ie);
            }
            resp = docker.inspectExecCmd(execid).exec();
        }
        int retCode = resp.getExitCode();
        if (retCode != 0) {
            throw new RuntimeException(
                    String.format("cmd(%s) failed on %s with exitcode %d", cmdString, containerId, retCode));
        } else {
            LOG.info("DOCKER.exec({}:{}): completed with {}", containerId, cmdString, retCode);
        }
        return output.toString();
    }

    public static Optional<String> getContainerCluster(DockerClient docker, String containerId) {
        return Optional
                .ofNullable(docker.inspectContainerCmd(containerId).exec().getConfig().getLabels().get("cluster"));
    }

    public static Set<String> allCubeIds() {
        Pattern pattern = Pattern.compile("^arq.cube.docker.([^.]*).ip$");
        return System.getProperties().keySet().stream().map(k -> pattern.matcher(k.toString()))
                .filter(m -> m.matches()).map(m -> m.group(1)).collect(Collectors.toSet());
    }

    public static Set<String> cubeIdsWithLabels(DockerClient docker, Map<String, String> labels) {
        return allCubeIds().stream().filter(id -> {
            Map<String, String> configuredLabels = docker.inspectContainerCmd(id).exec().getConfig().getLabels();
            return labels.entrySet().stream()
                    .map(e -> configuredLabels.containsKey(e.getKey())
                            && configuredLabels.get(e.getKey()).equals(e.getValue()))
                    .reduce(true, (acc, res) -> acc && res);
        }).collect(Collectors.toSet());
    }
}