# cluster: eks.Cluster
user_data = """MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="==MYBOUNDARY=="
--==MYBOUNDARY==
Content-Type: text/x-shellscript; charset="us-ascii"
#!/bin/bash
echo "Running custom user data script"
--==MYBOUNDARY==--\
lt = ec2.CfnLaunchTemplate(self, "LaunchTemplate",
    launch_template_data=ec2.CfnLaunchTemplate.LaunchTemplateDataProperty(
        instance_type="t3.small",
        user_data=Fn.base64(user_data)
cluster.add_nodegroup_capacity("extra-ng",
    launch_template_spec=eks.LaunchTemplateSpec(
        id=lt.ref,
        version=lt.attr_latest_version_number
Attributes
The Launch template ID.