# Create a cluster with Ganglia
<a name="init_Ganglia"></a>

**Note**  
The last release of Amazon EMR to include Ganglia was Amazon EMR 6.15.0. To monitor your cluster, releases higher than 6.15.0 include the [Amazon CloudWatch agent](emr-AmazonCloudWatchAgent.md).

**To create a cluster with Ganglia using the console**

1. Navigate to the new Amazon EMR console and select **Switch to the old console** from the side navigation. For more information on what to expect when you switch to the old console, see [Using the old console](https://docs.aws.amazon.com/emr/latest/ManagementGuide/whats-new-in-console.html#console-opt-in).

1. Choose **Create cluster**.

1. In **Software configuration**, choose either **All Applications**, **Core Hadoop**, or **Spark**.

1. Proceed with creating the cluster with configurations as appropriate.

**To add Ganglia to a cluster using the AWS CLI**

In the AWS CLI, you can add Ganglia to a cluster by using `create-cluster` with the `--applications` parameter. If you specify only Ganglia using the `--applications` parameter, Ganglia is the only application installed.
+ Type the following command to add Ganglia when you create a cluster and replace *myKey* with the name of your EC2 key pair.
**Note**  
Linux line continuation characters (\$1) are included for readability. They can be removed or used in Linux commands. For Windows, remove them or replace with a caret (^).

  ```
  aws emr create-cluster --name "Spark cluster with Ganglia" --release-label emr-6.15.0; \
  --applications Name=Spark Name=Ganglia \
  --ec2-attributes KeyName=myKey --instance-type m5.xlarge \
  --instance-count 3 --use-default-roles
  ```

  When you specify the instance count without using the `--instance-groups` parameter, a single master node is launched, and the remaining instances are launched as core nodes. All nodes use the instance type specified in the command.
**Note**  
If you have not previously created the default EMR service role and EC2 instance profile, type `aws emr create-default-roles` to create them before typing the `create-cluster` subcommand.

  For more information about using Amazon EMR commands in the AWS CLI, see [https://docs.aws.amazon.com/cli/latest/reference/emr](https://docs.aws.amazon.com/cli/latest/reference/emr).