Starburst Enterprise with CFT requirements#

The following sections detail networking and security requirements, best practices, and troubleshooting tips for the Starburst Enterprise platform (SEP) CloudFormation template in AWS.

SSH keys#

Amazon EC2 uses public–key cryptography to encrypt and decrypt login information, so to access your SEP cluster you need to set up a private/public key pair. To log into your instance where SEP is installed, do the following:

  1. Create a key pair.

  2. Specify the name of the key pair when you launch the instance or invoke the CloudFormation template.

  3. Provide the private key when you connect to the instance. This enables you to securely access your instance using the private key pair instead of a password.


Amazon EC2 stores only the public key and you are responsible for storing the private key. Take action to safeguard your keys, as anyone who possesses your private key can decrypt your login information.

You can find more information about key pair usage with EC2 in the AWS documentation.

VPC and VPC subnets#

When using SEP’s CloudFormation template, you must specify which existing VPC and subnets to deploy to.

Read more about best practices when selecting VPCs for SEP. You can also find more information about VPCs and subnets in the AWS documentation.

Security groups#

It’s recommended that ports 8080 and 8088 are accessible in order to access the Starburst Enterprise web UI, submit queries from outside the cluster, and access Apache Superset. Additionally, it’s recommended that port 22 is accessible for SSH access.

You can find more information about security groups in the AWS documentation.

IAM requirements#

AWS Identity and Access Management (IAM) is a web service that helps you securely control access to your AWS resources. The following sections detail the IAM roles used by the SEP CloudFormation template.

IAM role permissions for cluster nodes#

Below is a JSON segment for the IAM role automatically created by the SEP CloudFormation template. The role is used by the cluster nodes that are created on the stack. The permissions set below are a minimal subset of IAM permissions:

    "Statement": [
            "Action": [
            "Effect": "Allow",
            "Resource": [
    "Version": "2012-10-17"

In the above:

  • AutoScaling, EC2 and SQS permissions are needed for graceful scaledown to work, when autoscaling kicks in, or reshaping the cluster via the stack modification.

  • CloudWatch Logs permissions are needed to enable logging to AWS CloudWatch Logs.

  • CloudFormation permission is needed to report startup progress back to CloudFormation.

  • CloudWatch permissions are needed to run the coordinator high availability features.

  • Glue access is needed to leverage AWS Glue data catalogs.

  • S3 permissions are needed for the Hive connector to actually access (read/write) the data on S3.

If a user wants to have a more precise control over the permissions, and for example limit S3 access to a specific bucket, then a custom IAM Instance Profile can be provided and passed to the CloudFormation template during stack creation (IamInstanceProfile field in the stack creation form). The custom profile is then used instead and the IAM Role and Instance Profile are not created.


You must give all other permissions regarding AutoScaling, SQS, EC2, CloudFormation, CloudWatch, and Glue to this custom role. Otherwise, the cluster either fails to start or does not function as documented.

Additionally the role needs to have a trust relationship to EC2 established, so that EC2 can use this role on the user’s behalf. Below is a minimal trust relationship document:

  "Version": "2012-10-17",
  "Statement": [
      "Sid": "",
      "Effect": "Allow",
      "Principal": {
        "Service": ""
      "Action": "sts:AssumeRole"

IAM role permissions for CloudFormation#

The user who launches the CloudFormation template needs to have specific permissions to issue all necessary actions in AWS during stack creation. In particular, before proceeding make sure your IAM user/role has a policy with permissions to manage all of the following:

    "Statement": [
            "Action": [
            "Effect": "Allow",
            "Resource": [
    "Version": "2012-10-17"

The role needs to have a trust relationship to CloudFormation established, so that CloudFormation can use this role on the user’s behalf. Below is a minimal trust relationship document:

  "Version": "2012-10-17",
  "Statement": [
      "Sid": "",
      "Effect": "Allow",
      "Principal": {
        "Service": ""
      "Action": "sts:AssumeRole"

Instance profiles#

When using SEP’s CloudFormation template, specify the instance profile to associate with the EC2 instances. For example, this may be useful to provide the EC2 instance the appropriate privileges to access data in S3.

You can find more information about instance profiles.

AWS CFT Troubleshooting tips#

The following sections describe procedures and other information to troubleshoot your SEP clusters.

Accessing an SEP cluster node to troubleshoot#

You can connect to your SEP cluster via SSH. To do so, you must first obtain the IP address of the coordinator and the file name of your .pem file.

To locate the coordinator IP address:

  • CloudFormation Console: Navigate to the CloudFormation Console under “Management Tools” within the Services menu.

  • Outputs: Select your “Stack Name” and click the associated tab labeled “Outputs”.

  • SSH Access: Find and copy the “StarburstSSH” key’s value.

After you have gathered that information, type the ssh command in a terminal window to establish a connection to the coordinator:

ssh ec2-user@coordinator-ip -i ~/.ssh/mykeypair.pem

Using the example above, replace coordinator-ip with the IP address of your coordinator and replace mykeypair.pem with the location and file name of your .pem file.

Custom SEP configuration#

When using a Custom configuration, the CloudFormation update stack may not update the Starburst Enterprise platform (SEP) configuration after you’ve made changes to content in your configuration zip. This usually occurs if the updated configuration zip file name is the same as previously used. Try renaming the package and rerunning the CloudFormation update stack. We recommend including a version name within the file name to avoid any complications when updating your configurations.

When using a Custom configuration, the CloudFormation update stack may fail. This is often because the configuration zip file has an invalid directory structure. Be sure to double check the content and structure of your configuration package. When troubleshooting, try adding incremental updates to the configuration package until it fails.

Read more about HA considerations for non-standard issues related to custom security configurations and coordinator HA.

Placement groups capacity#

When using the cluster placement group type, you can encounter insufficient capacity errors. To avoid such a setback, consider the following suggestions:

Single launch request#

It is recommended that you launch the number of instances that you need in the placement group in a single launch request, and that you use the same instance type for all instances in the placement group. If you try to add more instances to the placement group later, or if you try to launch more than one instance type in the placement group, you increase your chances of getting an insufficient capacity error.

Start. Stop. Relaunch.#

If you receive a capacity error when launching an instance in a placement group that already has running instances, stop and start all of the instances in the placement group, and try the launch again. Restarting the instances may migrate them to hardware that has the capacity for all the requested instances.

Refer to the AWS documentation for more information on placement groups.