sparkonk8s资源暂存服务器与Python

Question

我一直在使用spark-on-k8sv2.2.0-kubernetes-0.5.0、kubernetesv1.9.0和Minikube v0.25.0来跟踪Running Spark on Kubernetes docs。在

我可以使用以下命令成功运行Python作业：

bin/spark-submit \
  --deploy-mode cluster \
  --master k8s://https://10.128.0.4:8443 \
  --kubernetes-namespace default \
  --conf spark.executor.instances=1 \
  --conf spark.app.name=spark-pi \
  --conf spark.kubernetes.driver.docker.image=kubespark/spark-driver-py:v2.2.0-kubernetes-0.5.0 \
  --conf spark.kubernetes.executor.docker.image=kubespark/spark-executor-py:v2.2.0-kubernetes-0.5.0 \
  --jars local:///opt/spark/examples/jars/spark-examples_2.11-2.2.0-k8s-0.5.0.jar \
  local:///opt/spark/examples/src/main/python/pi.py 10

我能够在本地服务器上成功地运行与此资源相关的临时任务：

^{pr2}$

是否可以运行具有本地依赖关系的Python作业？我试过这个命令，但失败了：

bin/spark-submit \
  --deploy-mode cluster \
  --master k8s://https://10.128.0.4:8443 \
  --kubernetes-namespace default \
  --conf spark.executor.instances=1 \
  --conf spark.app.name=spark-pi \
  --conf spark.kubernetes.driver.docker.image=kubespark/spark-driver-py:v2.2.0-kubernetes-0.5.0 \
  --conf spark.kubernetes.executor.docker.image=kubespark/spark-executor-py:v2.2.0-kubernetes-0.5.0 \
  --conf spark.kubernetes.initcontainer.docker.image=kubespark/spark-init:v2.2.0-kubernetes-0.5.0 \
  --conf spark.kubernetes.resourceStagingServer.uri=http://10.128.0.4:31000 \
  ./examples/src/main/python/pi.py 10

我在驱动程序日志中发现了这个错误：

Error: Could not find or load main class .opt.spark.jars.RoaringBitmap-0.5.11.jar

事件日志中的这些错误：

MountVolume.SetUp failed for volume "spark-init-properties" : configmaps "spark-pi-1518224354203-init-config" not found
...
MountVolume.SetUp failed for volume "spark-init-secret" : secrets "spark-pi-1518224354203-init-secret" not found

Answer 1

修复方法是通过 jars将示例jar作为依赖项提供：

bin/spark-submit \
   deploy-mode cluster \
   master k8s://https://10.128.0.4:8443 \
   kubernetes-namespace default \
   conf spark.executor.instances=1 \
   conf spark.app.name=spark-pi \
   conf spark.kubernetes.driver.docker.image=kubespark/spark-driver-py:v2.2.0-kubernetes-0.5.0 \
   conf spark.kubernetes.executor.docker.image=kubespark/spark-executor-py:v2.2.0-kubernetes-0.5.0 \
   conf spark.kubernetes.initcontainer.docker.image=kubespark/spark-init:v2.2.0-kubernetes-0.5.0 \
   conf spark.kubernetes.resourceStagingServer.uri=http://10.128.0.4:31000 \
   jars local:///opt/spark/examples/jars/spark-examples_2.11-2.2.0-k8s-0.5.0.jar \
  ./examples/src/main/python/pi.py 10

我不知道为什么这样做（RoaringBitmap-0.5.11.jar应该存在于/opt/spark/jars中，并且在任何情况下都要添加到类路径中），但这暂时解决了我的问题。在