added duckdns

README.md

@@ -4,7 +4,7 @@ Launches EC2 instance, creates private key, and saves it on the machine.
 
 Usage:
 ```
-terraform apply -var="instance_type=t2.nano" -var="instance_name=k3s-box" -var="instance_ami=ami-0889a44b331db0194" -var="availability_zone=us-east-1a" -var="create_ebs_block_device=false" - var="enable_ingress_http=false" -auto-approve
+terraform apply -var="instance_type=t2.nano" -var="instance_name=k3s-box" -var="instance_ami=ami-0889a44b331db0194" -var="availability_zone=us-east-1a" -var="create_ebs_block_device=false" - var="enable_ingress_http=false" -var="duckdns_domain=<duckdns_domain>" -var="duckdns_token=<duckdns_token>" -auto-approve
 ```
 
 Defaults of vars are set to the ones provided in "Usage"

ec2.tf

@@ -12,7 +12,26 @@ resource "aws_instance" "k3s_box" {
     count = var.create_ebs_block_device ? 1 : 0
   }
 
-  user_data = "${file("./script.sh")}"
+  # user_data = "${file("./setup_scripts/script.sh")}"
+
+  provisioner "file" {
+    source = "./setup_scripts/install_crontab.sh"
+    destination = "/home/ec2-user"
+  }
+
+  provisioner "file" {
+    source = "./setup_scripts/duckdns.sh"
+    destination = "/home/ec2-user"
+  }
+
+  provisioner "remote-exec" {
+    inline = [ 
+      "chmod +x /home/ec2-user/install_crontab.sh",
+      "/home/ec2-user/install_crontab.sh",
+      "chmod +x /home/ec2-user/duckdns.sh",
+      "/home/ec2-user/duckdns.sh ${var.duckdns_domain} ${var.duckdns_token}"
+     ]
+  }
 
   tags = {
     Name = var.instance_name

setup_scripts/duckdns.sh

@@ -0,0 +1,10 @@
+#! /bin/bash
+
+mkdir duckdns
+cd duckdns
+touch duck.sh
+echo url="https://www.duckdns.org/update?domains=$1&token=$2&ip=" | curl -k -o ~/duckdns/duck.log -K -
+chmod 700 duck.sh
+sudo touch /var/spool/cron/root
+sudo echo "*/5 * * * * ~/duckdns/duck.sh >/dev/null 2>&1" >> /var/spool/cron/root
+./duck.sh

setup_scripts/install_crontab.sh

@@ -0,0 +1,6 @@
+#! /bin/bash
+
+sudo yum install cronie -y
+sudo systemctl enable crond.service
+sudo systemctl start crond.service
+sudo systemctl status crond.service > /home/ec2-user/crontab-status.txt

variables.tf

@@ -26,4 +26,14 @@ variable "create_ebs_block_device" {
 variable "enable_ingress_http" {
   type = bool
   default = false
+}
+
+variable "duckdns_domain" {
+    type = string
+    default = "None"
+}
+
+variable "duckdns_token" {
+  type = string
+  default = "None"
 }