skonto commented on a change in pull request #25609: [SPARK-28896][K8S]
Download hadoop configurations from k8s configmap if the client process has
files to upload
URL: https://github.com/apache/spark/pull/25609#discussion_r320252109
##########
File path:
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/KubernetesUtils.scala
##########
@@ -267,30 +271,56 @@ private[spark] object KubernetesUtils extends Logging {
}
}
- def uploadFileUri(uri: String, conf: Option[SparkConf] = None): String = {
- conf match {
- case Some(sConf) =>
- if (sConf.get(KUBERNETES_FILE_UPLOAD_PATH).isDefined) {
- val fileUri = Utils.resolveURI(uri)
- try {
- val hadoopConf = SparkHadoopUtil.get.newConfiguration(sConf)
- val uploadPath = sConf.get(KUBERNETES_FILE_UPLOAD_PATH).get
- val fs = getHadoopFileSystem(Utils.resolveURI(uploadPath),
hadoopConf)
- val randomDirName = s"spark-upload-${UUID.randomUUID()}"
- fs.mkdirs(new Path(s"${uploadPath}/${randomDirName}"))
- val targetUri =
s"${uploadPath}/${randomDirName}/${fileUri.getPath.split("/").last}"
- log.info(s"Uploading file: ${fileUri.getPath} to dest:
$targetUri...")
- uploadFileToHadoopCompatibleFS(new Path(fileUri.getPath), new
Path(targetUri), fs)
- targetUri
- } catch {
- case e: Exception =>
- throw new SparkException(s"Uploading file ${fileUri.getPath}
failed...", e)
+ def getUploadPath(conf: SparkConf, client: KubernetesClient): (FileSystem,
String) = {
+ conf.get(KUBERNETES_FILE_UPLOAD_PATH) match {
+ case Some(path) =>
+ val hadoopConf = new Configuration()
+ // When spark.kubernetes.file.upload.path is set, we need a cluster
specific hadoop config,
+ // and if we use spark.kubernetes.hadoop.configMapName to configure
not HADOOP_CONF_DIR, we
+ // should download the configmap to our client side.
+ // 1. add configurations from k8s configmap to hadoopConf
+ conf.get(KUBERNETES_HADOOP_CONF_CONFIG_MAP).foreach { cm =>
+ val hadoopConfFiles =
client.configMaps().withName(cm).get().getData.asScala
Review comment:
@yaooqinn This happens at submission time at the launcher machine, it is
weird to fetch the configmap from the cluster locally and not the way to go in
my opinion. You could just point to the right hadoop config and spark submit
will pick it up. `spark.kubernetes.hadoop.configMapName` was meant to be used
at the [driver
pod](https://github.com/apache/spark/blob/5cf2602ccbcada92f11ac715872061f8307d9d70/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/features/HadoopConfDriverFeatureStep.scala#L80)
and so that the hadoop files can be mounted on the fly within the cluster.
Even if you launch cluster mode in the cluster you can do the same, mount the
configmap and point to the files via the HADOOP_CONF_CONFIG var. @erikerlandson
@dongjoon-hyun fyi.
Btw configamaps are namespaced.
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