Terraform configuration to create and renew the HTTPS certificate for Ubiquiti's EdgeRouter.

1. A public DNS name that resolves to the EdgeRouter - probably pointing to its private IP
2. SSH access to the EdgeRouter via its DNS name using a SSH private key in your SSH agent
3. The service gui cert-file setting pointing at a location where the HTTPS certificate should be written

Apply a staging certificate, using default username/hostname:

terraform apply -var [email protected]

Apply a production certificate, overriding username/hostname:

terraform apply -var-file letsencrypt-prod.tfvars -var [email protected] -var router_username=nhinds -var router_hostname=router.example.com

See variables.tf for all available settings.