EKS Launch Template /w Cloud-Init Userdata

eks-launch-template-cloud-init.md

Terraform Example: Create EC2 Launch Template with Cloud-Init Userdata

Create Cloud-Init template

data "template_file" "cloud_init" {
  template = "${file("init.tpl")}"
  template = <<EOF
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="==BOUNDARY=="

--==BOUNDARY==
Content-Type: text/cloud-config; charset="us-ascii"

write_files:
- path: /etc/sysctl.d/55-elasticsearch.conf
  owner: root
  content: |
    vm.max_map_count=262144
runcmd:
- sysctl -w vm.max_map_count=262144

--==BOUNDARY==--\
EOF
}

Create EC2 Launch Template

resource "aws_launch_template" "foo" {
  ...
  user_data = "${base64encode(data.template_file.cloud_init.rendered)}"
  ...
}