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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.container.image;
import com.yahoo.concurrent.DaemonThreadFactory;
import com.yahoo.config.provision.DockerImage;
import com.yahoo.jdisc.Timer;
import com.yahoo.vespa.hosted.node.admin.component.TaskContext;
import com.yahoo.vespa.hosted.node.admin.container.ContainerEngine;
import com.yahoo.vespa.hosted.node.admin.container.RegistryCredentialsProvider;
import java.time.Duration;
import java.time.Instant;
import java.util.Collections;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Download a container image asynchronously.
*
* @author mpolden
*/
public class ContainerImageDownloader {
private static final Logger LOG = Logger.getLogger(ContainerImageDownloader.class.getName());
private final ContainerEngine containerEngine;
private final Timer timer;
private final ExecutorService executorService = Executors.newSingleThreadExecutor(
new DaemonThreadFactory("container-image-downloader")); // Download one image at a time
private final Set<DockerImage> pendingDownloads = Collections.synchronizedSet(new HashSet<>());
public ContainerImageDownloader(ContainerEngine containerEngine, Timer timer) {
this.containerEngine = Objects.requireNonNull(containerEngine);
this.timer = Objects.requireNonNull(timer);
}
/**
* Download given container image.
*
* @return true if the image download has completed.
*/
public boolean get(TaskContext context, DockerImage image, RegistryCredentialsProvider credentialsProvider) {
if (pendingDownloads.contains(image)) return false;
if (containerEngine.hasImage(context, image)) return true;
executorService.submit(() -> {
try {
Instant start = timer.currentTime();
containerEngine.pullImage(context, image, credentialsProvider.get());
LOG.log(Level.INFO, "Downloaded container image " + image + " in " + Duration.between(start, timer.currentTime()));
} catch (RuntimeException e) {
LOG.log(Level.SEVERE, "Failed to download container image " + image, e);
} finally {
pendingDownloads.remove(image);
}
});
pendingDownloads.add(image);
return false;
}
}
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