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(redux) add K8sJobRunnerSrv, which runs Cortex jobs using Kubernetes …
…Jobs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| package org.thp.cortex.services | ||
|
|
||
| import java.util.concurrent.TimeUnit | ||
| import java.nio.file._ | ||
|
|
||
| import scala.concurrent.duration.FiniteDuration | ||
| import scala.util.{Try} | ||
| import scala.collection.JavaConverters._ | ||
|
|
||
| import play.api.{Configuration, Logger} | ||
|
|
||
| import akka.actor.ActorSystem | ||
| import io.fabric8.kubernetes.client.{DefaultKubernetesClient} | ||
| import io.fabric8.kubernetes.api.model.batch.{JobBuilder => KJobBuilder} | ||
| import io.fabric8.kubernetes.api.model.{PersistentVolumeClaimVolumeSourceBuilder} | ||
| import javax.inject.{Inject, Singleton} | ||
| import org.thp.cortex.models._ | ||
|
|
||
| @Singleton | ||
| class K8sJobRunnerSrv( | ||
| client: DefaultKubernetesClient, | ||
| config: Configuration, | ||
| autoUpdate: Boolean, | ||
| jobBaseDirectory: Path, | ||
| persistentVolumeClaimName: String, | ||
| implicit val system: ActorSystem | ||
| ) { | ||
|
|
||
| @Inject() | ||
| def this(config: Configuration, system: ActorSystem) = | ||
| this( | ||
| new DefaultKubernetesClient(), | ||
| config, | ||
| config.getOptional[Boolean]("job.kubernetes.autoUpdate").getOrElse(true), | ||
| Paths.get(config.get[String]("job.directory")), | ||
| config.get[String]("job.kubernetes.persistentVolumeClaimName"), | ||
| system: ActorSystem | ||
| ) | ||
|
|
||
| lazy val logger = Logger(getClass) | ||
|
|
||
| lazy val isAvailable: Boolean = | ||
| Try { | ||
| val ver = client.getVersion() | ||
| logger.info(s"Kubernetes is available: major ${ver.getMajor()} minor ${ver.getMinor()} git ${ver.getGitCommit()}") | ||
| true | ||
| }.recover { | ||
| case error => | ||
| logger.info(s"Kubernetes is not available", error) | ||
| false | ||
| }.get | ||
|
|
||
| def run(jobDirectory: Path, dockerImage: String, job: Job, timeout: Option[FiniteDuration]): Try[Unit] = { | ||
| val cacertsFile = jobDirectory.resolve("input").resolve("cacerts") | ||
| val relativeJobDirectory = jobBaseDirectory.relativize(jobDirectory).toString() | ||
| // make the default longer than likely values, but still not infinite | ||
| val timeout_or_default = timeout getOrElse new FiniteDuration(8, TimeUnit.HOURS) | ||
| // https://kubernetes.io/docs/concepts/overview/working-with-objects/names/ | ||
| // FIXME: this collapses case, jeopardizing the uniqueness of the | ||
| // identifier. LDH: lowercase, digits, hyphens. | ||
| val ldh_jobid = "_".r.replaceAllIn(job.id.map(_.toLower), "-") | ||
| val kjobName = "neuron-job-" + ldh_jobid | ||
| val pvcvs = new PersistentVolumeClaimVolumeSourceBuilder() | ||
| .withClaimName(persistentVolumeClaimName) | ||
| .withReadOnly(false) | ||
| .build(); | ||
| val kjob1 = new KJobBuilder() | ||
| .withApiVersion("batch/v1") | ||
| .withNewMetadata() | ||
| .withName(kjobName) | ||
| .withLabels(Map( | ||
| "cortex-job-id" -> job.id, | ||
| "cortex-worker-id" -> job.workerId(), | ||
| "cortex-neuron-job" -> "true").asJava) | ||
| .endMetadata() | ||
| .withNewSpec() | ||
| .withNewTemplate() | ||
| .withNewSpec() | ||
| .addNewVolume() | ||
| .withName("job-directory") | ||
| .withPersistentVolumeClaim(pvcvs) | ||
| .endVolume() | ||
| .addNewContainer() | ||
| .withName("neuron") | ||
| .withImage(dockerImage) | ||
| .withArgs("/job") | ||
| .addNewEnv() | ||
| .withName("CORTEX_JOB_FOLDER") | ||
| .withValue(relativeJobDirectory) | ||
| .endEnv(); | ||
| val kjob2 = if (Files.exists(cacertsFile)) { | ||
| kjob1.addNewEnv() | ||
| .withName("REQUESTS_CA_BUNDLE") | ||
| .withValue("/job/input/cacerts") | ||
| .endEnv() | ||
| } else { | ||
| kjob1 | ||
| } | ||
| val kjob3 = kjob2 | ||
| .addNewVolumeMount() | ||
| .withName("job-directory") | ||
| .withSubPathExpr("$(CORTEX_JOB_FOLDER)/input") | ||
| .withMountPath("/job/input") | ||
| .withReadOnly(true) | ||
| .endVolumeMount() | ||
| .addNewVolumeMount() | ||
| .withName("job-directory") | ||
| .withSubPathExpr("$(CORTEX_JOB_FOLDER)/output") | ||
| .withMountPath("/job/output") | ||
| .withReadOnly(false) | ||
| .endVolumeMount() | ||
| .endContainer() | ||
| .withRestartPolicy("Never") | ||
| .endSpec() | ||
| .endTemplate() | ||
| .endSpec() | ||
| .build(); | ||
|
|
||
| val execution = Try { | ||
| val created_kjob = client.batch().jobs().create(kjob3) | ||
| val created_env = created_kjob | ||
| .getSpec().getTemplate().getSpec().getContainers().get(0) | ||
| .getEnv().asScala; | ||
| logger.info( | ||
| s"Created Kubernetes Job ${created_kjob.getMetadata().getName()}\n" + | ||
| s" timeout: ${timeout_or_default.toString}\n" + | ||
| s" image : $dockerImage\n" + | ||
| s" mount : pvc ${persistentVolumeClaimName} subdir ${relativeJobDirectory} as /job" + | ||
| created_env.map(ev => s"\n env : ${ev.getName()} = ${ev.getValue()}").mkString) | ||
| val ended_kjob = client.batch().jobs().withLabel("cortex-job-id", job.id) | ||
| .waitUntilCondition((x => Option(x).flatMap(j => | ||
| Option(j.getStatus).flatMap(s => | ||
| Some(s.getConditions.asScala.map(_.getType).filter(t => | ||
| t.equals("Complete") || t.equals("Failed")).nonEmpty))) | ||
| getOrElse false), | ||
| timeout_or_default.length, timeout_or_default.unit); | ||
| if(ended_kjob != null) { | ||
| logger.info(s"Kubernetes Job ${ended_kjob.getMetadata().getName()} " + | ||
| s"(for job ${job.id}) status is now ${ended_kjob.getStatus().toString()}") | ||
| } else { | ||
| logger.info(s"Kubernetes Job for ${job.id} no longer exists") | ||
| } | ||
| } | ||
| // let's find the job by the attribute we know is fundamentally | ||
| // unique, rather than one constructed from it | ||
| val deleted = client.batch().jobs().withLabel("cortex-job-id", job.id).delete() | ||
| if(deleted) { | ||
| logger.info(s"Deleted Kubernetes Job for job ${job.id}") | ||
| } else { | ||
| logger.info(s"While trying to delete Kubernetes Job for ${job.id}, the job was not found; this is OK") | ||
| } | ||
| execution | ||
| } | ||
| } |
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