refactor: make the atlantis docker image configurable

Author: Rahul-4480

README.md

@@ -74,6 +74,7 @@ This Terraform module automates the deployment of the Atlantis server on an ECS
 
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
+| <a name="input_atlantis_docker_image"></a> [atlantis\_docker\_image](#input\_atlantis\_docker\_image) | Docker image for Atlantis | `string` | n/a | yes |
 | <a name="input_atlantis_gh_user"></a> [atlantis\_gh\_user](#input\_atlantis\_gh\_user) | The GitHub username used by Atlantis to access repositories | `string` | n/a | yes |
 | <a name="input_atlantis_repo_allowlist"></a> [atlantis\_repo\_allowlist](#input\_atlantis\_repo\_allowlist) | Comma delimited string containing repos to use atlantis | `string` | n/a | yes |
 | <a name="input_atlantis_url"></a> [atlantis\_url](#input\_atlantis\_url) | Full URL for the Atlantis server | `string` | n/a | yes |

examples/complete/README.md

@@ -12,4 +12,5 @@ atlantis_repo_allowlist        = ["repo1", "repo2"]
 
 # Optional Parameters
 thumbprint_list                = ["your-thumbprint-1", "your-thumbprint-2"]
+atlantis_docker_image          = "your-docker-image"
 ```

examples/complete/main.tf

@@ -7,4 +7,5 @@ module "atlantis" {
   atlantis_repo_allowlist = var.atlantis_repo_allowlist
   atlantis_url            = var.atlantis_url
   thumbprint_list         = var.thumbprint_list
+  atlantis_docker_image   = var.atlantis_docker_image
 }

examples/complete/variables.tf

@@ -33,3 +33,9 @@ variable "thumbprint_list" {
   type        = list(string)
   default     = ["e252aa6e92432f32cbc1b182056627c239652678"]
 }
+
+variable "atlantis_docker_image" {
+  description = "Docker image for Atlantis"
+  type        = string
+  default     = "ghcr.io/runatlantis/atlantis:v0.23.1"
+}

locals.tf

@@ -1,14 +1,12 @@
 locals {
   google_oidc_endpoint                     = "https://accounts.google.com"
-  thumbprint_list                          = var.thumbprint_list
   container_port                           = 4141
   alb_ip_target_type                       = "ip"
   ecs_container_definations_name           = "atlantis"
   alb_system_name                          = "atlantis"
   domain_parts                             = split(".", var.atlantis_url)
   base_domain                              = join(".", slice(local.domain_parts, length(local.domain_parts) - 2, length(local.domain_parts)))
   sub_domain                               = join(".", slice(local.domain_parts, 0, length(local.domain_parts) - 2))
-  ecs_container_definations_image          = "ghcr.io/runatlantis/atlantis:v0.23.1"
   ecs_task_definition_family               = "atlantis"
   task_definition_network_mode             = "awsvpc"
   load_balancer_internal                   = "false"

main.tf

@@ -44,7 +44,7 @@ module "ecs_deployment" {
     execution_role_arn = aws_iam_role.task_role.arn
     container_definitions = [{
       name              = local.ecs_container_definations_name
-      image             = local.ecs_container_definations_image
+      image             = var.atlantis_docker_image
       container_port    = local.container_port
       environment       = local.env_variables
       secrets           = local.secrets

oidc.tf

@@ -1,5 +1,5 @@
 resource "aws_iam_openid_connect_provider" "google" {
   client_id_list  = [data.aws_ssm_parameter.environment["ATLANTIS_GOOGLE_CLIENT_ID"].value]
-  thumbprint_list = local.thumbprint_list
+  thumbprint_list = var.thumbprint_list
   url             = local.google_oidc_endpoint
 }

variables.tf

@@ -50,3 +50,8 @@ variable "thumbprint_list" {
   description = "The thumbprint of the OIDC provider"
   type        = list(string)
 }
+
+variable "atlantis_docker_image" {
+  description = "Docker image for Atlantis"
+  type        = string
+}