Enable node label on a cluster to configure partition

You can configure partitions on a cluster by making configuration changes on the YARN ResourceManager host.

To enable partition on a cluster, make the following configuration changes on the YARN ResourceManager host.

Create a Label Directory in HDFS
Use the following commands to create a "node-labels" directory in which to store the Node Labels in HDFS.
```
sudo su hdfs
hadoop fs -mkdir -p /yarn/node-labels
hadoop fs -chown -R yarn:yarn /yarn
hadoop fs -chmod -R 700 /yarn
```
-chmod -R 700 specifies that only the YARN user can access the node-labels directory.
You can then use the following command to confirm that the directory was created in HDFS.
```
hadoop fs -ls /yarn
```
The new node label directory should appear in the list returned by the following command. The owner should be yarn, and the permission should be drwx.
```
Found 1 items
drwx------ - yarn yarn 0 2014-11-24 13:09 /yarn/node-labels
```
Use the following commands to create a /user/<user_name> directory that is required by the distributed shell.
```
hadoop fs -mkdir -p /user/<user_name>
hadoop fs -chown -R yarn:yarn /user/<user_name>
hadoop fs -chmod -R 700 /user/<user_name>
```
In Cloudera Manager, select the YARN service.
Click the Configuration tab.
Search for YARN Service Advanced Configuration.
In YARN Service Advanced Configuration Snippet (Safety Valve) for yarn-site.xml add the following:
- Set the following property to enable partition:
```
Name: yarn.node-labels.enabled
Value: true
```
- Set the following property to reference the HDFS partition directory
```
Name: yarn.node-labels.fs-store.root-dir
Value: hdfs://:/
```
  For example,
```
Name: yarn.node-labels.fs-store.root-dir
Value: hdfs://node-1.example.com:8020/yarn/node-labels/ 
```
Start or Restart the YARN ResourceManager.