Add pre / post install and delete parameter

Author: npalm

modules/runners/main.tf

@@ -74,6 +74,8 @@ resource "aws_launch_template" "runner" {
   tag_specifications {
     resource_type = "instance"
     tags          = local.tags
+    pre_install   = var.userdata_pre_install
+    post_install  = var.userdata_post_install
   }
 
   user_data = base64encode(templatefile("${path.module}/templates/user-data.sh", {

modules/runners/templates/user-data.sh

@@ -17,6 +17,8 @@ exec > >(tee /var/log/user-data.log | logger -t user-data -s 2>/dev/console) 2>&
 
 yum update -y
 
+${pre_install}
+
 # Install docker
 amazon-linux-extras install docker
 service docker start
@@ -40,11 +42,14 @@ while [[ $(aws ssm get-parameters --names ${environment}-$INSTANCE_ID --with-dec
     sleep 1
 done
 config=$(aws ssm get-parameters --names ${environment}-$INSTANCE_ID --with-decryption --region $REGION | jq -r ".Parameters | .[0] | .Value")
+aws ssm delete-parameter --names ${environment}-$INSTANCE_ID --with-decryption --region $REGION
 
 export RUNNER_ALLOW_RUNASROOT=1
 ./config.sh --unattended --name $INSTANCE_ID --work "_work" $config
 
 chown -R ec2-user:ec2-user .
-
 ./svc.sh install ec2-user
+
+${post_install}
+
 ./svc.sh start

modules/runners/variables.tf

@@ -70,3 +70,16 @@ variable "ami_owners" {
   type        = list(string)
   default     = ["amazon"]
 }
+
+
+variable "userdata_pre_install" {
+  description = "User-data script snippet to insert before GitLab runner install"
+  type        = string
+  default     = ""
+}
+
+variable "userdata_post_install" {
+  description = "User-data script snippet to insert after GitLab runner install"
+  type        = string
+  default     = ""
+}