Add some swapspace to the instance

Without any swap space, the smallest AWS instance that this will work on sucessfully is a t2.small. With some swap space enabled, it might work on a t2.micro or t2.nano or the equivalent t3 machine equivalents.

To see if this works, add a 1GB swap file to the base AMI using Ansible. Then use Terraform to tweak the instance type by putting it into the extra parameters, applying Terraform, and rotating the servers, for example:

instance_type = "t2.micro"

Alternatively this could be accomplished by tweaking the Cloud Init processes initiated through ansible/cloudinit.yml, or through terraform/cloud-config.yml.

It could be something as simple as a cloud-init line such as:

S=/swap && dd bs=1M if=/dev/zero of=$S count=1024 && mkswap $S && chmod 0600 $S && swapon $S

Start with ansible/cloudinit.yml and terraform/cloud-config.yml to determine where the base AMI setup is defined, then inspect the Terraform extra parameters and instance rotation flow. Add a 1GB swap file through the chosen provisioning path, apply Terraform with a smaller instance type, and verify that the resulting instance operates successfully.