Cluster properties

The open source components installed on Dataproc clusters contain many configuration files. For example, Apache Spark and Apache Hadoop have several XML and plain text configuration files. From time to time, you may need to update or add to these configuration files. You can use the ‑‑properties flag of the gcloud dataproc clusters create command in the Cloud SDK to modify many common configuration files when creating a cluster.

How the `properties` flag works

To make updating files and properties easy, the gcloud dataproc clusters create --properties flag uses a special format to specify the configuration file, and the property and value within the file, that should be updated.

Formatting

The --properties flag requires a string of text in the following format:

file_prefix1:property1=value1,file_prefix2:property2=value2,...

Notes:

The --properties flag is ued to modify a specific set of commonly used configuration files. The file_prefix maps to a predefined set of configuration files.
The default delimiter used to separate multiple properties is the comma (,). However, if a comma is included in a property value, you must change the delimiter by specifying "^DELIMITER^" at the beginning of the property list.
Example to use a "#" delimiter:
```
--properties ^#^file_prefix1:property1=part1,part2#file_prefix2:property2=value2
```
See gcloud topic escaping for more information.

Apache Hadoop YARN, HDFS, Spark, and related properties

file_prefix	File	Purpose of file
capacity-scheduler	capacity-scheduler.xml	Hadoop YARN Capacity Scheduler configuration
core	core-site.xml	Hadoop general configuration
distcp	distcp-default.xml	Hadoop Distributed Copy configuration
hadoop-env	hadoop-env.sh	Hadoop specific environment variables
hdfs	hdfs-site.xml	Hadoop HDFS configuration
hive	hive-site.xml	Hive configuration
mapred	mapred-site.xml	Hadoop MapReduce configuration
mapred-env	mapred-env.sh	Hadoop MapReduce specific environment variables
pig	pig.properties	Pig configuration
presto	config.properties	Presto configuration
presto-jvm	jvm.config	Presto specific JVM configuration
spark	spark-defaults.conf	Spark configuration
spark-env	spark-env.sh	Spark specific environment variables
yarn	yarn-site.xml	Hadoop YARN configuration
yarn-env	yarn-env.sh	Hadoop YARN specific environment variables
zeppelin	zeppelin-site.xml	Zeppelin configuration
zeppelin-env	zeppelin-env.sh	Zeppelin specific environment variables (Optional Component only)
zookeeper	zoo.cfg	Zookeeper configuration

Important notes

Some properties are reserved and cannot be overridden because they impact the functionality of the Dataproc cluster. If you try to change a reserved property, you will receive an error message when creating your cluster.
You can specify multiple changes by separating each with a comma.
The --properties flag cannot modify configuration files not shown above.
Changes to properties will be applied before the daemons on your cluster start.
If the specified property exists, it will be updated. If the specified property does not exist, it will be added to the configuration file.

Dataproc service properties

These are additional properties specific to Dataproc that are not included in the files listed above. These properties can be used to further configure the functionality of your Dataproc cluster. Note: The following cluster properties are specified at cluster creation. They cannot be specified or updated after cluster creation.

Property	Values	Function
dataproc:am.primary_only	`true` or `false`	Set this property to `true` to prevent application master from running on Cloud Dataproc cluster preemptible workers. Note: This feature is only available with Cloud Dataproc 1.2 and higher. The default value is `false`.
dataproc:dataproc.allow.zero.workers	`true` or `false`	Set this SoftwareConfig property to `true` in a Dataproc `clusters.create` API request to create a Single node cluster, which changes default number of workers from 2 to 0, and places worker components on the master host. A Single node cluster can also be created from the Cloud Console or with the `gcloud` command-line tool by setting the number of workers to `0`.
dataproc:dataproc.alpha.master.nvdimm.size.gb	1500-6500	Setting a value creates a Dataproc master with Intel Optane DC Persistent memory. Note: Optane VMs can only be created in `us-central1-f` zones, only with `n1-highmem-96-aep` machine type and only under whitelisted projects.
dataproc:dataproc.alpha.worker.nvdimm.size.gb	1500-6500	Setting a value creates a Dataproc worker with Intel Optane DC Persistent memory. Note: Optane VMs can only be created in `us-central1-f` zones, only with `n1-highmem-96-aep` machine type and only under whitelisted projects.
dataproc:dataproc.conscrypt.provider.enable	`true` or `false`	Enables (`true`) or disables (`false`) Conscrypt as the primary Java security provider. Note: Conscrypt is enabled by default in Dataproc 1.2 and higher, but disabled in 1.0/1.1.
dataproc:dataproc.localssd.mount.enable	`true` or `false`	Whether to mount local SSDs as Hadoop/Spark temp directories and HDFS data directories (default: `true`).
dataproc:dataproc.logging.stackdriver.enable	`true` or `false`	Enables (`true`) or disables (`false`) logging to Stackdriver (default: `true`).
dataproc:dataproc.logging.stackdriver.job.driver.enable	`true` or `false`	Enables (`true`) or disables (`false`) Dataproc job driver logs in Logging (default: `false`).
dataproc:dataproc.logging.stackdriver.job.yarn.container.enable	`true` or `false`	Enables (`true`) or disables (`false`) YARN container logs in Logging. (default: `false`).
dataproc:dataproc.monitoring.stackdriver.enable	`true` or `false`	Enables (`true`) or disables (`false`) the Stackdriver Monitoring Agent.
dataproc:jobs.file-backed-output.enable	`true` or `false`	Configures Dataproc jobs to pipe their output to temporary files in the `/var/log/google-dataproc-job` directory. Must be set to `true` to enable job driver logging in Logging (default: `true`).
dataproc:jupyter.notebook.gcs.dir	`gs://<dir-path>`	Location in Cloud Storage to save Jupyter notebooks.
dataproc:kerberos.cross-realm-trust.admin-server	`hostname/address`	hostname/address of remote admin server (often the same as the KDC server).
dataproc:kerberos.cross-realm-trust.kdc	`hostname/address`	hostname/address of remote KDC.
dataproc:kerberos.cross-realm-trust.realm	`realm name`	Realm names can consist of any UPPERCASE ASCII string. Usually, the realm name is the same as your DNS domain name (in UPPERCASE). Example: If machines are named "`machine-id`.example.west-coast.mycompany.com", the associated realm may be designated as "EXAMPLE.WEST-COAST.MYCOMPANY.COM".
dataproc:kerberos.cross-realm-trust.shared-password.uri	`gs://<dir-path>`	Location in Cloud Storage of the KMS-encrypted shared password.
dataproc:kerberos.kdc.db.key.uri	`gs://<dir-path>`	Location in Cloud Storage of the KMS-encrypted file containing the KDC database master key.
dataproc:kerberos.key.password.uri	`gs://<dir-path>`	Location in Cloud Storage of the KMS-encrypted file that contains the password of the key in the keystore file.
dataproc:kerberos.keystore.password.uri	`gs://<dir-path>`	Location in Cloud Storage of the KMS-encrypted file containing the keystore password.
dataproc:kerberos.keystore.uri¹	`gs://<dir-path>`	Location in Cloud Storage of the keystore file containing the wildcard certificate and the private key used by cluster nodes.
dataproc:kerberos.kms.key.uri	`KMS key URI`	The URI of the KMS key used to decrypt root password, for example `projects/project-id/locations/region/keyRings/key-ring/cryptoKeys/key` (see Key resource ID).
dataproc:kerberos.root.principal.password.uri	`gs://<dir-path>`	Location in Cloud Storage of the KMS-encrypted password for Kerberos root principal.
dataproc:kerberos.tgt.lifetime.hours	`hours`	Max life time of the ticket granting ticket.
dataproc:kerberos.truststore.password.uri	`gs://<dir-path>`	Location in Cloud Storage of the KMS-encrypted file that contains the password to the truststore file.
dataproc:kerberos.truststore.uri²	`gs://<dir-path>`	Location in Cloud Storage of the KMS-encrypted trust store file containing trusted certificates.
zeppelin:zeppelin.notebook.gcs.dir	`gs://<dir-path>`	Location in Cloud Storage to save Zeppelin notebooks.

¹Keystore file: The keystore file contains the SSL certificate. It should be in Java KeyStore (JKS) format. When copied to VMs, it is renamed to keystore.jks. The SSL certificate should be a wildcard certificate that applies to each node in the cluster.

²Truststore file: The truststore file should be in Java KeyStore (JKS) format. When copied to VMs, it is renamed to truststore.jks.

Examples

gcloud command

To change the spark.mastersetting in the spark-defaults.conf file, you can do so by adding the following properties flag when creating a new cluster on the command line:

--properties 'spark:spark.master=spark://example.com'

You can change several properties at once, in one or more configuration files, by using a comma separator. Each property must be specified in the full file_prefix:property=value format. For example, to change the spark.master setting in the spark-defaults.conf file and the dfs.hosts setting in the hdfs-site.xml file, you can use the following flag when creating a cluster:

--properties 'spark:spark.master=spark://example.com,hdfs:dfs.hosts=/foo/bar/baz'

REST API

To set spark.executor.memory to 10g, insert the following properties setting in the SoftwareConfig section of your clusters.create request:

"properties": {
  "spark:spark.executor.memory": "10g"
}

An easy way to see how to construct the JSON body of a Dataproc API clusters REST request is to initiate the equivalent gcloud command using the --log-http flag. Here is a sample gcloud dataproc clusters create command, which sets cluster properties with the --properties spark:spark.executor.memory=10g flag. The stdout log shows the resulting REST request body (the properties snippet is shown below):

gcloud dataproc clusters create my-cluster \
    --properties spark:spark.executor.memory=10g \
    --log-http \
    other args ...

Output:

...
== body start ==
{"clusterName": "my-cluster", "config": {"gceClusterConfig": ...
"masterConfig": {... "softwareConfig": {"properties": {"spark:spark.executor.memory": "10g"}},

...
== body end ==
...

Note: Make sure to cancel the command after the JSON body appears in the output if you do not want the command to take effect.

Console

To change the spark.master setting in the spark-defaults.conf file:

In the Cloud Console, open the Dataproc Create a cluster page. Click Advanced options at the bottom of the page to view the Cluster properties section.
Click + Add cluster property, select spark in the left drop-down list, then add "spark.master" in the property field and the setting in the value field.

How the properties flag works