main.tf

data "aws_region" "current" {
}

locals {
  log_group             = "/ecs/${var.name}"
  log_retention_in_days = var.log_retention_in_days
}

resource "aws_cloudwatch_log_group" "main" {
  name              = local.log_group
  retention_in_days = local.log_retention_in_days
}

resource "aws_iam_role" "execution" {
  assume_role_policy = <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": "sts:AssumeRole",
      "Principal": {
        "Service": "ecs-tasks.amazonaws.com"
      },
      "Effect": "Allow"
    }
  ]
}
EOF

}

resource "aws_iam_role_policy" "execution" {
  role = aws_iam_role.execution.name

  policy = <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "ecr:GetAuthorizationToken",
        "ecr:BatchCheckLayerAvailability",
        "ecr:GetDownloadUrlForLayer",
        "ecr:BatchGetImage"
      ],
      "Resource": "*"
    },
    {
      "Effect": "Allow",
      "Action": [
        "logs:CreateLogStream",
        "logs:PutLogEvents"
      ],
      "Resource": "*"
    }
  ]
}
EOF

}

resource "aws_iam_role" "task" {
  assume_role_policy = <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": "sts:AssumeRole",
      "Principal": {
        "Service": "ecs-tasks.amazonaws.com"
      },
      "Effect": "Allow"
    }
  ]
}
EOF

}

resource "aws_ecs_task_definition" "main" {
  family = var.name

  network_mode = "awsvpc"

  requires_compatibilities = ["FARGATE"]

  execution_role_arn = aws_iam_role.execution.arn
  task_role_arn      = aws_iam_role.task.arn

  cpu    = var.cpu
  memory = var.memory

  container_definitions = <<EOF
[
  {
    "name": "${var.name}",
    "image": "${var.image}",
    "essential": true,
    "logConfiguration": {
      "logDriver": "awslogs",
      "options": {
        "awslogs-group": "${local.log_group}",
        "awslogs-region": "${data.aws_region.current.name}",
        "awslogs-stream-prefix": "ecs"
      }
    }
    ${var.container_definition_extra == "" ? "" : ",${var.container_definition_extra}"}
  }
]
EOF

}