Timeout on LoadBalancer exposing ECS services - amazon-web-services

Question

I'm currently trying to expose 2 services from my ECS cluster on a loadbalancer with a HTTP listener redirecting to a HTTPS listener (which is forwarding to the target groups of my services, depending on the host-header).
I registered the certificates with AWS Certificate Manager, but unfortunately I get timeouts when I'm trying to hit the URLS on my browser.
I am deploying those resources with Terraform :
resource "aws_lb_target_group" "nginx-tg" {
name = "nginx-tg"
target_type = "ip"
protocol = "HTTP"
port = "80"
vpc_id = var.vpc-id
}
resource "aws_lb_target_group" "apache2-tg" {
name = "apache2-tg"
target_type = "ip"
protocol = "HTTP"
port = "80"
vpc_id = var.vpc-id
}
resource "aws_lb_listener_certificate" "nginx-certificate" {
certificate_arn = var.nginx-certificate-arn # subdomain1.domain.com
listener_arn = aws_lb_listener.test-cluster-lb-https-listener.arn
}
resource "aws_lb_listener_certificate" "apache2-certificate" {
certificate_arn = var.apache2-certificate-arn # subdomain2.domain.com
listener_arn = aws_lb_listener.test-cluster-lb-https-listener.arn
}
resource "aws_lb_listener" "test-cluster-lb-https-listener" {
load_balancer_arn = aws_lb.test-cluster-elb.arn
port = "443"
protocol = "HTTPS"
ssl_policy = "ELBSecurityPolicy-2016-08"
certificate_arn = var.listener-certificate-arn
default_action {
type = "redirect"
redirect {
port = "443"
protocol = "HTTPS"
status_code = "HTTP_301"
host = "home.domain.com"
path = "/"
}
}
}
resource "aws_lb_listener_rule" "nginx-listener-rule" {
listener_arn = aws_lb_listener.test-cluster-lb-https-listener.arn
action {
type = "forward"
target_group_arn = aws_lb_target_group.nginx-tg.arn
}
condition {
host_header {
values = [var.nginx-url]
}
}
priority = 1
}
resource "aws_lb_listener_rule" "apache2-listener-rule" {
listener_arn = aws_lb_listener.test-cluster-lb-https-listener.arn
action {
type = "forward"
target_group_arn = aws_lb_target_group.apache2-tg.arn
}
condition {
host_header {
values = [var.apache2-url]
}
}
priority = 2
}
And here is the ECS services declaration :
resource "aws_ecs_service" "nginx" {
name = "nginx"
launch_type = "FARGATE"
cluster = aws_ecs_cluster.ecs_cluster.id
task_definition = aws_ecs_task_definition.nginx_task.arn
desired_count = 2
network_configuration {
subnets = [var.private-sn-az-1, var.private-sn-az-2]
security_groups = [aws_security_group.service-sg.id]
assign_public_ip = true
}
load_balancer {
target_group_arn = aws_lb_target_group.nginx-tg.arn
container_name = "nginx"
container_port = 80
}
}
resource "aws_ecs_service" "apache2" {
name = "apache2"
launch_type = "FARGATE"
cluster = aws_ecs_cluster.ecs_cluster.id
task_definition = aws_ecs_task_definition.apache2_task.arn
desired_count = 2
network_configuration {
subnets = [var.private-sn-az-1, var.private-sn-az-2]
security_groups = [aws_security_group.service-sg.id]
assign_public_ip = true
}
load_balancer {
target_group_arn = aws_lb_target_group.apache2-tg.arn
container_name = "apache2"
container_port = 80
}
}
The security group of the services allows all the requests from my loadbalancer on port 80 !
It's my first post so I may have been unclear on some points, if you need the rest of the resources declaration feel free to ask me :)
Thank you in advance !!
What I tried : Target group was exposing port 8080, switched it to 80.
What I expected : Thought that my service was only listening on port 80, so changing it would make the timeout go.
What actually happened : Still got a timeout when i'm trying to accesss the urls (subdomain1.domain.com & subdomain2.domain.com)...