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[SPARK-18278][SCHEDULER] Spark on Kubernetes - Basic Scheduler Backend
## What changes were proposed in this pull request? This is a stripped down version of the `KubernetesClusterSchedulerBackend` for Spark with the following components: - Static Allocation of Executors - Executor Pod Factory - Executor Recovery Semantics It's step 1 from the step-wise plan documented [here](apache-spark-on-k8s#441 (comment)). This addition is covered by the [SPIP vote](http://apache-spark-developers-list.1001551.n3.nabble.com/SPIP-Spark-on-Kubernetes-td22147.html) which passed on Aug 31 . ## How was this patch tested? - The patch contains unit tests which are passing. - Manual testing: `./build/mvn -Pkubernetes clean package` succeeded. - It is a **subset** of the entire changelist hosted in http://github.com/apache-spark-on-k8s/spark which is in active use in several organizations. - There is integration testing enabled in the fork currently [hosted by PepperData](spark-k8s-jenkins.pepperdata.org:8080) which is being moved over to RiseLAB CI. - Detailed documentation on trying out the patch in its entirety is in: https://apache-spark-on-k8s.github.io/userdocs/running-on-kubernetes.html cc rxin felixcheung mateiz (shepherd) k8s-big-data SIG members & contributors: mccheah ash211 ssuchter varunkatta kimoonkim erikerlandson liyinan926 tnachen ifilonenko Author: Yinan Li <[email protected]> Author: foxish <[email protected]> Author: mcheah <[email protected]> Closes apache#19468 from foxish/spark-kubernetes-3.
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core/src/main/scala/org/apache/spark/scheduler/cluster/SchedulerBackendUtils.scala
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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.spark.scheduler.cluster | ||
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| import org.apache.spark.SparkConf | ||
| import org.apache.spark.internal.config.{DYN_ALLOCATION_MAX_EXECUTORS, DYN_ALLOCATION_MIN_EXECUTORS, EXECUTOR_INSTANCES} | ||
| import org.apache.spark.util.Utils | ||
|
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| private[spark] object SchedulerBackendUtils { | ||
| val DEFAULT_NUMBER_EXECUTORS = 2 | ||
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| /** | ||
| * Getting the initial target number of executors depends on whether dynamic allocation is | ||
| * enabled. | ||
| * If not using dynamic allocation it gets the number of executors requested by the user. | ||
| */ | ||
| def getInitialTargetExecutorNumber( | ||
| conf: SparkConf, | ||
| numExecutors: Int = DEFAULT_NUMBER_EXECUTORS): Int = { | ||
| if (Utils.isDynamicAllocationEnabled(conf)) { | ||
| val minNumExecutors = conf.get(DYN_ALLOCATION_MIN_EXECUTORS) | ||
| val initialNumExecutors = Utils.getDynamicAllocationInitialExecutors(conf) | ||
| val maxNumExecutors = conf.get(DYN_ALLOCATION_MAX_EXECUTORS) | ||
| require(initialNumExecutors >= minNumExecutors && initialNumExecutors <= maxNumExecutors, | ||
| s"initial executor number $initialNumExecutors must between min executor number " + | ||
| s"$minNumExecutors and max executor number $maxNumExecutors") | ||
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| initialNumExecutors | ||
| } else { | ||
| conf.get(EXECUTOR_INSTANCES).getOrElse(numExecutors) | ||
| } | ||
| } | ||
| } |
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| <?xml version="1.0" encoding="UTF-8"?> | ||
| <!-- | ||
| ~ 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. | ||
| --> | ||
| <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> | ||
| <modelVersion>4.0.0</modelVersion> | ||
| <parent> | ||
| <groupId>org.apache.spark</groupId> | ||
| <artifactId>spark-parent_2.11</artifactId> | ||
| <version>2.3.0-SNAPSHOT</version> | ||
| <relativePath>../../../pom.xml</relativePath> | ||
| </parent> | ||
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| <artifactId>spark-kubernetes_2.11</artifactId> | ||
| <packaging>jar</packaging> | ||
| <name>Spark Project Kubernetes</name> | ||
| <properties> | ||
| <sbt.project.name>kubernetes</sbt.project.name> | ||
| <kubernetes.client.version>3.0.0</kubernetes.client.version> | ||
| </properties> | ||
|
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| <dependencies> | ||
| <dependency> | ||
| <groupId>org.apache.spark</groupId> | ||
| <artifactId>spark-core_${scala.binary.version}</artifactId> | ||
| <version>${project.version}</version> | ||
| </dependency> | ||
|
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| <dependency> | ||
| <groupId>org.apache.spark</groupId> | ||
| <artifactId>spark-core_${scala.binary.version}</artifactId> | ||
| <version>${project.version}</version> | ||
| <type>test-jar</type> | ||
| <scope>test</scope> | ||
| </dependency> | ||
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| <dependency> | ||
| <groupId>io.fabric8</groupId> | ||
| <artifactId>kubernetes-client</artifactId> | ||
| <version>${kubernetes.client.version}</version> | ||
| <exclusions> | ||
| <exclusion> | ||
| <groupId>com.fasterxml.jackson.core</groupId> | ||
| <artifactId>*</artifactId> | ||
| </exclusion> | ||
| <exclusion> | ||
| <groupId>com.fasterxml.jackson.dataformat</groupId> | ||
| <artifactId>jackson-dataformat-yaml</artifactId> | ||
| </exclusion> | ||
| </exclusions> | ||
| </dependency> | ||
|
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| <!-- Required by kubernetes-client but we exclude it --> | ||
| <dependency> | ||
| <groupId>com.fasterxml.jackson.dataformat</groupId> | ||
| <artifactId>jackson-dataformat-yaml</artifactId> | ||
| <version>${fasterxml.jackson.version}</version> | ||
| </dependency> | ||
|
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| <!-- Explicitly depend on shaded dependencies from the parent, since shaded deps aren't transitive --> | ||
| <dependency> | ||
| <groupId>com.google.guava</groupId> | ||
| <artifactId>guava</artifactId> | ||
| </dependency> | ||
| <!-- End of shaded deps. --> | ||
|
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| <dependency> | ||
| <groupId>org.mockito</groupId> | ||
| <artifactId>mockito-core</artifactId> | ||
| <scope>test</scope> | ||
| </dependency> | ||
|
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| <dependency> | ||
| <groupId>com.squareup.okhttp3</groupId> | ||
| <artifactId>okhttp</artifactId> | ||
| <version>3.8.1</version> | ||
| </dependency> | ||
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| </dependencies> | ||
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| <build> | ||
| <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory> | ||
| <testOutputDirectory>target/scala-${scala.binary.version}/test-classes</testOutputDirectory> | ||
| </build> | ||
|
|
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| </project> |
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resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/Config.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| /* | ||
| * 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.spark.deploy.k8s | ||
|
|
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| import org.apache.spark.internal.Logging | ||
| import org.apache.spark.internal.config.ConfigBuilder | ||
| import org.apache.spark.network.util.ByteUnit | ||
|
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| private[spark] object Config extends Logging { | ||
|
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| val KUBERNETES_NAMESPACE = | ||
| ConfigBuilder("spark.kubernetes.namespace") | ||
| .doc("The namespace that will be used for running the driver and executor pods. When using " + | ||
| "spark-submit in cluster mode, this can also be passed to spark-submit via the " + | ||
| "--kubernetes-namespace command line argument.") | ||
| .stringConf | ||
| .createWithDefault("default") | ||
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| val EXECUTOR_DOCKER_IMAGE = | ||
| ConfigBuilder("spark.kubernetes.executor.docker.image") | ||
| .doc("Docker image to use for the executors. Specify this using the standard Docker tag " + | ||
| "format.") | ||
| .stringConf | ||
| .createOptional | ||
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| val DOCKER_IMAGE_PULL_POLICY = | ||
| ConfigBuilder("spark.kubernetes.docker.image.pullPolicy") | ||
| .doc("Kubernetes image pull policy. Valid values are Always, Never, and IfNotPresent.") | ||
| .stringConf | ||
| .checkValues(Set("Always", "Never", "IfNotPresent")) | ||
| .createWithDefault("IfNotPresent") | ||
|
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| val APISERVER_AUTH_DRIVER_CONF_PREFIX = | ||
| "spark.kubernetes.authenticate.driver" | ||
| val APISERVER_AUTH_DRIVER_MOUNTED_CONF_PREFIX = | ||
| "spark.kubernetes.authenticate.driver.mounted" | ||
| val OAUTH_TOKEN_CONF_SUFFIX = "oauthToken" | ||
| val OAUTH_TOKEN_FILE_CONF_SUFFIX = "oauthTokenFile" | ||
| val CLIENT_KEY_FILE_CONF_SUFFIX = "clientKeyFile" | ||
| val CLIENT_CERT_FILE_CONF_SUFFIX = "clientCertFile" | ||
| val CA_CERT_FILE_CONF_SUFFIX = "caCertFile" | ||
|
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| val KUBERNETES_SERVICE_ACCOUNT_NAME = | ||
| ConfigBuilder(s"$APISERVER_AUTH_DRIVER_CONF_PREFIX.serviceAccountName") | ||
| .doc("Service account that is used when running the driver pod. The driver pod uses " + | ||
| "this service account when requesting executor pods from the API server. If specific " + | ||
| "credentials are given for the driver pod to use, the driver will favor " + | ||
| "using those credentials instead.") | ||
| .stringConf | ||
| .createOptional | ||
|
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| // Note that while we set a default for this when we start up the | ||
| // scheduler, the specific default value is dynamically determined | ||
| // based on the executor memory. | ||
| val KUBERNETES_EXECUTOR_MEMORY_OVERHEAD = | ||
| ConfigBuilder("spark.kubernetes.executor.memoryOverhead") | ||
| .doc("The amount of off-heap memory (in megabytes) to be allocated per executor. This " + | ||
| "is memory that accounts for things like VM overheads, interned strings, other native " + | ||
| "overheads, etc. This tends to grow with the executor size. (typically 6-10%).") | ||
| .bytesConf(ByteUnit.MiB) | ||
| .createOptional | ||
|
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| val KUBERNETES_EXECUTOR_LABEL_PREFIX = "spark.kubernetes.executor.label." | ||
| val KUBERNETES_EXECUTOR_ANNOTATION_PREFIX = "spark.kubernetes.executor.annotation." | ||
|
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| val KUBERNETES_DRIVER_POD_NAME = | ||
| ConfigBuilder("spark.kubernetes.driver.pod.name") | ||
| .doc("Name of the driver pod.") | ||
| .stringConf | ||
| .createOptional | ||
|
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| val KUBERNETES_EXECUTOR_POD_NAME_PREFIX = | ||
| ConfigBuilder("spark.kubernetes.executor.podNamePrefix") | ||
| .doc("Prefix to use in front of the executor pod names.") | ||
| .internal() | ||
| .stringConf | ||
| .createWithDefault("spark") | ||
|
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| val KUBERNETES_ALLOCATION_BATCH_SIZE = | ||
| ConfigBuilder("spark.kubernetes.allocation.batch.size") | ||
| .doc("Number of pods to launch at once in each round of executor allocation.") | ||
| .intConf | ||
| .checkValue(value => value > 0, "Allocation batch size should be a positive integer") | ||
| .createWithDefault(5) | ||
|
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| val KUBERNETES_ALLOCATION_BATCH_DELAY = | ||
| ConfigBuilder("spark.kubernetes.allocation.batch.delay") | ||
| .doc("Number of seconds to wait between each round of executor allocation.") | ||
| .longConf | ||
| .checkValue(value => value > 0, "Allocation batch delay should be a positive integer") | ||
| .createWithDefault(1) | ||
|
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| val KUBERNETES_EXECUTOR_LIMIT_CORES = | ||
| ConfigBuilder("spark.kubernetes.executor.limit.cores") | ||
| .doc("Specify the hard cpu limit for a single executor pod") | ||
| .stringConf | ||
| .createOptional | ||
|
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| val KUBERNETES_EXECUTOR_LOST_REASON_CHECK_MAX_ATTEMPTS = | ||
| ConfigBuilder("spark.kubernetes.executor.lostCheck.maxAttempts") | ||
| .doc("Maximum number of attempts allowed for checking the reason of an executor loss " + | ||
| "before it is assumed that the executor failed.") | ||
| .intConf | ||
| .checkValue(value => value > 0, "Maximum attempts of checks of executor lost reason " + | ||
| "must be a positive integer") | ||
| .createWithDefault(10) | ||
|
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| val KUBERNETES_NODE_SELECTOR_PREFIX = "spark.kubernetes.node.selector." | ||
| } |
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