[SPARK-25887][K8S] Configurable K8S context support
This enhancement allows for specifying the desired context to use for the initial K8S client auto-configuration. This allows users to more easily access alternative K8S contexts without having to first explicitly change their current context via kubectl. Explicitly set my K8S context to a context pointing to a non-existent cluster, then launched Spark jobs with explicitly specified contexts via the new `spark.kubernetes.context` configuration property. Example Output: ``` > kubectl config current-context minikube > minikube status minikube: Stopped cluster: kubectl: > ./spark-submit --master k8s://https://localhost:6443 --deploy-mode cluster --name spark-pi --class org.apache.spark.examples.SparkPi --conf spark.executor.instances=2 --conf spark.kubernetes.context=docker-for-desktop --conf spark.kubernetes.container.image=rvesse/spark:debian local:///opt/spark/examples/jars/spark-examples_2.11-3.0.0-SNAPSHOT.jar 4 18/10/31 11:57:51 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 18/10/31 11:57:51 INFO SparkKubernetesClientFactory: Auto-configuring K8S client using context docker-for-desktop from users K8S config file 18/10/31 11:57:52 INFO LoggingPodStatusWatcherImpl: State changed, new state: pod name: spark-pi-1540987071845-driver namespace: default labels: spark-app-selector -> spark-2c4abc226ed3415986eb602bd13f3582, spark-role -> driver pod uid: 32462cac-dd04-11e8-b6c6-025000000001 creation time: 2018-10-31T11:57:52Z service account name: default volumes: spark-local-dir-1, spark-conf-volume, default-token-glpfv node name: N/A start time: N/A phase: Pending container status: N/A 18/10/31 11:57:52 INFO LoggingPodStatusWatcherImpl: State changed, new state: pod name: spark-pi-1540987071845-driver namespace: default labels: spark-app-selector -> spark-2c4abc226ed3415986eb602bd13f3582, spark-role -> driver pod uid: 32462cac-dd04-11e8-b6c6-025000000001 creation time: 2018-10-31T11:57:52Z service account name: default volumes: spark-local-dir-1, spark-conf-volume, default-token-glpfv node name: docker-for-desktop start time: N/A phase: Pending container status: N/A ... 18/10/31 11:58:03 INFO LoggingPodStatusWatcherImpl: State changed, new state: pod name: spark-pi-1540987071845-driver namespace: default labels: spark-app-selector -> spark-2c4abc226ed3415986eb602bd13f3582, spark-role -> driver pod uid: 32462cac-dd04-11e8-b6c6-025000000001 creation time: 2018-10-31T11:57:52Z service account name: default volumes: spark-local-dir-1, spark-conf-volume, default-token-glpfv node name: docker-for-desktop start time: 2018-10-31T11:57:52Z phase: Succeeded container status: container name: spark-kubernetes-driver container image: rvesse/spark:debian container state: terminated container started at: 2018-10-31T11:57:54Z container finished at: 2018-10-31T11:58:02Z exit code: 0 termination reason: Completed ``` Without the `spark.kubernetes.context` setting this will fail because the current context - `minikube` - is pointing to a non-running cluster e.g. ``` > ./spark-submit --master k8s://https://localhost:6443 --deploy-mode cluster --name spark-pi --class org.apache.spark.examples.SparkPi --conf spark.executor.instances=2 --conf spark.kubernetes.container.image=rvesse/spark:debian local:///opt/spark/examples/jars/spark-examples_2.11-3.0.0-SNAPSHOT.jar 4 18/10/31 12:02:30 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 18/10/31 12:02:30 INFO SparkKubernetesClientFactory: Auto-configuring K8S client using current context from users K8S config file 18/10/31 12:02:31 WARN WatchConnectionManager: Exec Failure javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949) at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302) at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296) at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509) at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216) at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979) at sun.security.ssl.Handshaker.process_record(Handshaker.java:914) at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062) at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387) at okhttp3.internal.connection.RealConnection.connectTls(RealConnection.java:281) at okhttp3.internal.connection.RealConnection.establishProtocol(RealConnection.java:251) at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:151) at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:195) at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121) at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100) at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at io.fabric8.kubernetes.client.utils.BackwardsCompatibilityInterceptor.intercept(BackwardsCompatibilityInterceptor.java:119) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at io.fabric8.kubernetes.client.utils.ImpersonatorInterceptor.intercept(ImpersonatorInterceptor.java:66) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at io.fabric8.kubernetes.client.utils.HttpClientUtils$2.intercept(HttpClientUtils.java:109) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185) at okhttp3.RealCall$AsyncCall.execute(RealCall.java:135) at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387) at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292) at sun.security.validator.Validator.validate(Validator.java:260) at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324) at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229) at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124) at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491) ... 39 more Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141) at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126) at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382) ... 45 more Exception in thread "kubernetes-dispatcher-0" Exception in thread "main" java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask611a9c09 rejected from java.util.concurrent.ScheduledThreadPoolExecutor404819e4[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0] at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2047) at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:823) at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:326) at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:533) at java.util.concurrent.ScheduledThreadPoolExecutor.submit(ScheduledThreadPoolExecutor.java:632) at java.util.concurrent.Executors$DelegatedExecutorService.submit(Executors.java:678) at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager.scheduleReconnect(WatchConnectionManager.java:300) at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager.access$800(WatchConnectionManager.java:48) at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager$2.onFailure(WatchConnectionManager.java:213) at okhttp3.internal.ws.RealWebSocket.failWebSocket(RealWebSocket.java:543) at okhttp3.internal.ws.RealWebSocket$2.onFailure(RealWebSocket.java:208) at okhttp3.RealCall$AsyncCall.execute(RealCall.java:148) at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) io.fabric8.kubernetes.client.KubernetesClientException: Failed to start websocket at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager$2.onFailure(WatchConnectionManager.java:204) at okhttp3.internal.ws.RealWebSocket.failWebSocket(RealWebSocket.java:543) at okhttp3.internal.ws.RealWebSocket$2.onFailure(RealWebSocket.java:208) at okhttp3.RealCall$AsyncCall.execute(RealCall.java:148) at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949) at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302) at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296) at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509) at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216) at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979) at sun.security.ssl.Handshaker.process_record(Handshaker.java:914) at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062) at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387) at okhttp3.internal.connection.RealConnection.connectTls(RealConnection.java:281) at okhttp3.internal.connection.RealConnection.establishProtocol(RealConnection.java:251) at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:151) at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:195) at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121) at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100) at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at io.fabric8.kubernetes.client.utils.BackwardsCompatibilityInterceptor.intercept(BackwardsCompatibilityInterceptor.java:119) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at io.fabric8.kubernetes.client.utils.ImpersonatorInterceptor.intercept(ImpersonatorInterceptor.java:66) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at io.fabric8.kubernetes.client.utils.HttpClientUtils$2.intercept(HttpClientUtils.java:109) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185) at okhttp3.RealCall$AsyncCall.execute(RealCall.java:135) ... 4 more Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387) at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292) at sun.security.validator.Validator.validate(Validator.java:260) at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324) at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229) at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124) at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491) ... 39 more Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141) at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126) at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382) ... 45 more 18/10/31 12:02:31 INFO ShutdownHookManager: Shutdown hook called 18/10/31 12:02:31 INFO ShutdownHookManager: Deleting directory /private/var/folders/6b/y1010qp107j9w2dhhy8csvz0000xq3/T/spark-5e649891-8a0f-4f17-bf3a-33b34082eba8 ``` Suggested reviews: mccheah liyinan926 - this is the follow up fix to the bug discovered while working on SPARK-25809 (PR #22805) Closes #22904 from rvesse/SPARK-25887. Authored-by: Rob Vesse <rvesse@dotnetrdf.org> Signed-off-by: Marcelo Vanzin <vanzin@cloudera.com>
This commit is contained in:
Rob Vesse
Marcelo Vanzin
parent
66450bbc1b
commit
c542c247bb
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@ -334,6 +334,16 @@ the Spark application.
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## Kubernetes Features
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### Configuration File
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Your Kubernetes config file typically lives under `.kube/config` in your home directory or in a location specified by the `KUBECONFIG` environment variable. Spark on Kubernetes will attempt to use this file to do an initial auto-configuration of the Kubernetes client used to interact with the Kubernetes cluster. A variety of Spark configuration properties are provided that allow further customising the client configuration e.g. using an alternative authentication method.
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### Contexts
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Kubernetes configuration files can contain multiple contexts that allow for switching between different clusters and/or user identities. By default Spark on Kubernetes will use your current context (which can be checked by running `kubectl config current-context`) when doing the initial auto-configuration of the Kubernetes client.
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In order to use an alternative context users can specify the desired context via the Spark configuration property `spark.kubernetes.context` e.g. `spark.kubernetes.context=minikube`.
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### Namespaces
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Kubernetes has the concept of [namespaces](https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/).
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@ -406,13 +416,23 @@ Some of these include:
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# Configuration
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See the [configuration page](configuration.html) for information on Spark configurations. The following configurations are
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specific to Spark on Kubernetes.
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See the [configuration page](configuration.html) for information on Spark configurations. The following configurations are specific to Spark on Kubernetes.
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#### Spark Properties
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<table class="table">
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<tr><th>Property Name</th><th>Default</th><th>Meaning</th></tr>
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<tr>
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<td><code>spark.kubernetes.context</code></td>
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<td><code>(none)</code></td>
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<td>
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The context from the user Kubernetes configuration file used for the initial
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auto-configuration of the Kubernetes client library. When not specified then
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the users current context is used. <strong>NB:</strong> Many of the
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auto-configured settings can be overridden by the use of other Spark
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configuration properties e.g. <code>spark.kubernetes.namespace</code>.
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</td>
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</tr>
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<tr>
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<td><code>spark.kubernetes.namespace</code></td>
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<td><code>default</code></td>
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@ -24,6 +24,18 @@ import org.apache.spark.internal.config.ConfigBuilder
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private[spark] object Config extends Logging {
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val KUBERNETES_CONTEXT =
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ConfigBuilder("spark.kubernetes.context")
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.doc("The desired context from your K8S config file used to configure the K8S " +
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"client for interacting with the cluster. Useful if your config file has " +
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"multiple clusters or user identities defined. The client library used " +
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"locates the config file via the KUBECONFIG environment variable or by defaulting " +
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"to .kube/config under your home directory. If not specified then your current " +
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"context is used. You can always override specific aspects of the config file " +
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"provided configuration using other Spark on K8S configuration options.")
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.stringConf
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.createOptional
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val KUBERNETES_NAMESPACE =
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ConfigBuilder("spark.kubernetes.namespace")
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.doc("The namespace that will be used for running the driver and executor pods.")
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@ -21,11 +21,13 @@ import java.io.File
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import com.google.common.base.Charsets
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import com.google.common.io.Files
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import io.fabric8.kubernetes.client.{ConfigBuilder, DefaultKubernetesClient, KubernetesClient}
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import io.fabric8.kubernetes.client.Config.autoConfigure
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import io.fabric8.kubernetes.client.utils.HttpClientUtils
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import okhttp3.Dispatcher
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import org.apache.spark.SparkConf
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import org.apache.spark.deploy.k8s.Config._
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import org.apache.spark.internal.Logging
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import org.apache.spark.util.ThreadUtils
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/**
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@ -33,7 +35,7 @@ import org.apache.spark.util.ThreadUtils
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* parse configuration keys, similar to the manner in which Spark's SecurityManager parses SSL
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* options for different components.
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*/
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private[spark] object SparkKubernetesClientFactory {
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private[spark] object SparkKubernetesClientFactory extends Logging {
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def createKubernetesClient(
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master: String,
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@ -42,9 +44,6 @@ private[spark] object SparkKubernetesClientFactory {
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sparkConf: SparkConf,
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defaultServiceAccountToken: Option[File],
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defaultServiceAccountCaCert: Option[File]): KubernetesClient = {
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// TODO [SPARK-25887] Support configurable context
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val oauthTokenFileConf = s"$kubernetesAuthConfPrefix.$OAUTH_TOKEN_FILE_CONF_SUFFIX"
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val oauthTokenConf = s"$kubernetesAuthConfPrefix.$OAUTH_TOKEN_CONF_SUFFIX"
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val oauthTokenFile = sparkConf.getOption(oauthTokenFileConf)
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@ -67,8 +66,16 @@ private[spark] object SparkKubernetesClientFactory {
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val dispatcher = new Dispatcher(
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ThreadUtils.newDaemonCachedThreadPool("kubernetes-dispatcher"))
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// TODO [SPARK-25887] Create builder in a way that respects configurable context
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val config = new ConfigBuilder()
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// Allow for specifying a context used to auto-configure from the users K8S config file
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val kubeContext = sparkConf.get(KUBERNETES_CONTEXT).filter(_.nonEmpty)
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logInfo("Auto-configuring K8S client using " +
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kubeContext.map("context " + _).getOrElse("current context") +
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" from users K8S config file")
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// Start from an auto-configured config with the desired context
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// Fabric 8 uses null to indicate that the users current context should be used so if no
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// explicit setting pass null
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val config = new ConfigBuilder(autoConfigure(kubeContext.getOrElse(null)))
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.withApiVersion("v1")
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.withMasterUrl(master)
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.withWebsocketPingInterval(0)
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