adds logs_retention_in_days variable defaulting to 90 days (#36)

Author: jritsema

env/dev/README.md

@@ -60,6 +60,7 @@ $ terraform apply
 | internal | Whether the application is available on the public internet, also will determine which subnets will be used (public or private) | string | `true` | no |
 | lb_port | The port the load balancer will listen on | string | `80` | no |
 | lb_protocol | The load balancer protocol | string | `HTTP` | no |
+| logs_retention_in_days | Specifies the number of days you want to retain log events | int | 90 | no |
 | logz_token | The auth token to use for sending logs to Logz.io | string | - | yes |
 | logz_url | The endpoint to use for sending logs to Logz.io | string | `https://listener.logz.io:8071` | no |
 | private_subnets | The private subnets, minimum of 2, that are a part of the VPC(s) | string | - | yes |

env/dev/ecs.tf

@@ -176,8 +176,14 @@ resource "aws_iam_role_policy_attachment" "ecsTaskExecutionRole_policy" {
   policy_arn = "arn:aws:iam::aws:policy/service-role/AmazonECSTaskExecutionRolePolicy"
 }
 
+variable "logs_retention_in_days" {
+  type        = number
+  default     = 90
+  description = "Specifies the number of days you want to retain log events"
+}
+
 resource "aws_cloudwatch_log_group" "logs" {
   name              = "/fargate/service/${var.app}-${var.environment}"
-  retention_in_days = "14"
+  retention_in_days = var.logs_retention_in_days
   tags              = var.tags
 }