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Merge pull request #9 from Together-Java/feat/use-docker-java-client
Feat/use docker java client
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149 changes: 149 additions & 0 deletions
149
JShellAPI/src/main/java/org/togetherjava/jshellapi/service/DockerService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| package org.togetherjava.jshellapi.service; | ||
|
|
||
| import com.github.dockerjava.api.DockerClient; | ||
| import com.github.dockerjava.api.async.ResultCallback; | ||
| import com.github.dockerjava.api.command.PullImageResultCallback; | ||
| import com.github.dockerjava.api.model.*; | ||
| import com.github.dockerjava.core.DefaultDockerClientConfig; | ||
| import com.github.dockerjava.core.DockerClientImpl; | ||
| import com.github.dockerjava.httpclient5.ApacheDockerHttpClient; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import org.springframework.beans.factory.DisposableBean; | ||
| import org.springframework.beans.factory.annotation.Autowired; | ||
| import org.springframework.stereotype.Service; | ||
| import org.togetherjava.jshellapi.Config; | ||
|
|
||
| import java.io.*; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.time.Duration; | ||
| import java.util.*; | ||
| import java.util.concurrent.TimeUnit; | ||
|
|
||
| @Service | ||
| public class DockerService implements DisposableBean { | ||
| private static final Logger LOGGER = LoggerFactory.getLogger(DockerService.class); | ||
| private static final String WORKER_LABEL = "jshell-api-worker"; | ||
| private static final UUID WORKER_UNIQUE_ID = UUID.randomUUID(); | ||
|
|
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| private final DockerClient client; | ||
|
|
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| public DockerService(Config config) { | ||
| DefaultDockerClientConfig clientConfig = DefaultDockerClientConfig.createDefaultConfigBuilder().build(); | ||
| ApacheDockerHttpClient httpClient = new ApacheDockerHttpClient.Builder() | ||
| .dockerHost(clientConfig.getDockerHost()) | ||
| .sslConfig(clientConfig.getSSLConfig()) | ||
| .responseTimeout(Duration.ofSeconds(config.dockerResponseTimeout())) | ||
| .connectionTimeout(Duration.ofSeconds(config.dockerConnectionTimeout())) | ||
| .build(); | ||
| this.client = DockerClientImpl.getInstance(clientConfig, httpClient); | ||
|
|
||
| cleanupLeftovers(WORKER_UNIQUE_ID); | ||
| } | ||
|
|
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| private void cleanupLeftovers(UUID currentId) { | ||
| for (Container container : client.listContainersCmd().withLabelFilter(Set.of(WORKER_LABEL)).exec()) { | ||
| String containerHumanName = container.getId() + " " + Arrays.toString(container.getNames()); | ||
| LOGGER.info("Found worker container '{}'", containerHumanName); | ||
| if (!container.getLabels().get(WORKER_LABEL).equals(currentId.toString())) { | ||
| LOGGER.info("Killing container '{}'", containerHumanName); | ||
| client.killContainerCmd(container.getId()).exec(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public String spawnContainer( | ||
| long maxMemoryMegs, long cpus, String name, Duration evalTimeout, long sysoutLimit | ||
| ) throws InterruptedException { | ||
| String imageName = "togetherjava.org:5001/togetherjava/jshellwrapper"; | ||
| boolean presentLocally = client.listImagesCmd() | ||
| .withFilter("reference", List.of(imageName)) | ||
| .exec() | ||
| .stream() | ||
| .flatMap(it -> Arrays.stream(it.getRepoTags())) | ||
| .anyMatch(it -> it.endsWith(":master")); | ||
|
|
||
| if (!presentLocally) { | ||
| client.pullImageCmd(imageName) | ||
| .withTag("master") | ||
| .exec(new PullImageResultCallback()) | ||
| .awaitCompletion(5, TimeUnit.MINUTES); | ||
| } | ||
|
|
||
| return client.createContainerCmd( | ||
| imageName + ":master" | ||
| ) | ||
| .withHostConfig( | ||
| HostConfig.newHostConfig() | ||
| .withAutoRemove(true) | ||
| .withInit(true) | ||
| .withCapDrop(Capability.ALL) | ||
| .withNetworkMode("none") | ||
| .withPidsLimit(2000L) | ||
| .withReadonlyRootfs(true) | ||
| .withMemory(maxMemoryMegs * 1024 * 1024) | ||
| .withCpuCount(cpus) | ||
| ) | ||
| .withStdinOpen(true) | ||
| .withAttachStdin(true) | ||
| .withAttachStderr(true) | ||
| .withAttachStdout(true) | ||
| .withEnv("evalTimeoutSeconds=" + evalTimeout.toSeconds(), "sysOutCharLimit=" + sysoutLimit) | ||
| .withLabels(Map.of(WORKER_LABEL, WORKER_UNIQUE_ID.toString())) | ||
| .withName(name) | ||
| .exec() | ||
| .getId(); | ||
| } | ||
|
|
||
| public InputStream startAndAttachToContainer(String containerId, InputStream stdin) throws IOException { | ||
| PipedInputStream pipeIn = new PipedInputStream(); | ||
| PipedOutputStream pipeOut = new PipedOutputStream(pipeIn); | ||
|
|
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| client.attachContainerCmd(containerId) | ||
| .withLogs(true) | ||
| .withFollowStream(true) | ||
| .withStdOut(true) | ||
| .withStdErr(true) | ||
| .withStdIn(stdin) | ||
| .exec(new ResultCallback.Adapter<>() { | ||
| @Override | ||
| public void onNext(Frame object) { | ||
| try { | ||
| String payloadString = new String(object.getPayload(), StandardCharsets.UTF_8); | ||
| if (object.getStreamType() == StreamType.STDOUT) { | ||
| pipeOut.write(object.getPayload()); | ||
| } else { | ||
| LOGGER.warn( | ||
| "Received STDERR from container {}: {}", | ||
| containerId, | ||
| payloadString | ||
| ); | ||
| } | ||
| } catch (IOException e) { | ||
| throw new UncheckedIOException(e); | ||
| } | ||
| } | ||
| }); | ||
|
|
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| client.startContainerCmd(containerId).exec(); | ||
| return pipeIn; | ||
| } | ||
|
|
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| public void killContainerByName(String name) { | ||
| for (Container container : client.listContainersCmd().withNameFilter(Set.of(name)).exec()) { | ||
| client.killContainerCmd(container.getId()).exec(); | ||
| } | ||
| } | ||
|
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| public boolean isDead(String containerName) { | ||
| return client.listContainersCmd().withNameFilter(Set.of(containerName)).exec().isEmpty(); | ||
| } | ||
|
|
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| @Override | ||
| public void destroy() throws Exception { | ||
| LOGGER.info("destroy() called. Destroying all containers..."); | ||
| cleanupLeftovers(UUID.randomUUID()); | ||
| client.close(); | ||
| } | ||
|
|
||
| } |
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