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267locals {
name = "${var.project_name}-${var.environment}-hasura"
}
resource "aws_ecs_cluster" "this" {
name = local.name
setting {
name = "containerInsights"
value = "enabled"
}
}
resource "aws_cloudwatch_log_group" "this" {
name = "/ecs/${local.name}"
retention_in_days = var.log_retention_in_days
}
data "aws_iam_policy_document" "ecs_assume_role" {
statement {
effect = "Allow"
actions = ["sts:AssumeRole"]
principals {
type = "Service"
identifiers = ["ecs-tasks.amazonaws.com"]
}
}
}
resource "aws_iam_role" "execution" {
name = "${local.name}-execution"
assume_role_policy = data.aws_iam_policy_document.ecs_assume_role.json
}
resource "aws_iam_role_policy_attachment" "execution" {
role = aws_iam_role.execution.name
policy_arn = "arn:aws:iam::aws:policy/service-role/AmazonECSTaskExecutionRolePolicy"
}
resource "aws_iam_role" "task" {
name = "${local.name}-task"
assume_role_policy = data.aws_iam_policy_document.ecs_assume_role.json
}
resource "aws_ecs_task_definition" "this" {
family = local.name
requires_compatibilities = ["FARGATE"]
network_mode = "awsvpc"
cpu = var.cpu
memory = var.memory
execution_role_arn = aws_iam_role.execution.arn
task_role_arn = aws_iam_role.task.arn
container_definitions = jsonencode([
{
name = "hasura"
image = var.hasura_image
essential = true
portMappings = [{
containerPort = 8080
protocol = "tcp"
}]
environment = [
{ name = "HASURA_GRAPHQL_DATABASE_URL", value = var.database_url },
{ name = "HASURA_GRAPHQL_ADMIN_SECRET", value = var.admin_secret },
{ name = "HASURA_GRAPHQL_ENABLE_CONSOLE", value = "true" },
{ name = "HASURA_GRAPHQL_CORS_DOMAIN", value = var.cors_allowed_origins },
{ name = "HASURA_GRAPHQL_ENABLED_LOG_TYPES", value = "startup, http-log, webhook-log, websocket-log, query-log" },
# Without this, Hasura has no way to validate the Cognito ID token in
# the Authorization header (the x-hasura-* claims routes/cognito's
# tokenGeneration.ts injects at the standard "https://hasura.io/jwt/claims"
# location are meaningless to Hasura until it's told to look for and
# verify them) — every request falls back to requiring the raw admin
# secret instead.
{ name = "HASURA_GRAPHQL_JWT_SECRET", value = jsonencode({
type = "RS256"
jwk_url = "https://cognito-idp.${var.aws_region}.amazonaws.com/${var.user_pool_id}/.well-known/jwks.json"
issuer = "https://cognito-idp.${var.aws_region}.amazonaws.com/${var.user_pool_id}"
audience = var.web_client_id
# Cognito's PreTokenGeneration trigger can only set claim override
# values as strings (a hard AWS constraint) — tokenGeneration.ts
# JSON.stringifies the whole x-hasura-* claims object to work
# around it, so Hasura needs to know to parse it back out rather
# than expect an already-decoded JSON object at that claims key.
claims_format = "stringified_json"
}) },
# With JWT auth configured above, Hasura requires either a valid
# token or this fallback for every request — otherwise a request
# with no Authorization header at all (e.g. Logo.tsx's deliberately
# public cobranding fetch, meant to work logged-out) is rejected
# outright instead of falling back to the "anonymous" role the
# metadata already defines permissions for.
{ name = "HASURA_GRAPHQL_UNAUTHORIZED_ROLE", value = "anonymous" },
]
logConfiguration = {
logDriver = "awslogs"
options = {
"awslogs-group" = aws_cloudwatch_log_group.this.name
"awslogs-region" = data.aws_region.current.name
"awslogs-stream-prefix" = "hasura"
}
}
}
])
}
data "aws_region" "current" {}
resource "aws_lb" "this" {
name = local.name
internal = false
load_balancer_type = "application"
security_groups = [var.alb_security_group_id]
subnets = var.public_subnet_ids
}
resource "aws_lb_target_group" "this" {
name = local.name
port = 8080
protocol = "HTTP"
vpc_id = var.vpc_id
target_type = "ip"
health_check {
path = "/healthz"
healthy_threshold = 2
unhealthy_threshold = 5
interval = 30
timeout = 10
}
}
resource "aws_lb_listener" "http" {
load_balancer_arn = aws_lb.this.arn
port = 80
protocol = "HTTP"
dynamic "default_action" {
for_each = var.acm_certificate_arn != null ? [1] : []
content {
type = "redirect"
redirect {
port = "443"
protocol = "HTTPS"
status_code = "HTTP_301"
}
}
}
dynamic "default_action" {
for_each = var.acm_certificate_arn == null ? [1] : []
content {
type = "forward"
target_group_arn = aws_lb_target_group.this.arn
}
}
}
resource "aws_lb_listener" "https" {
count = var.acm_certificate_arn != null ? 1 : 0
load_balancer_arn = aws_lb.this.arn
port = 443
protocol = "HTTPS"
ssl_policy = "ELBSecurityPolicy-TLS13-1-2-2021-06"
certificate_arn = var.acm_certificate_arn
default_action {
type = "forward"
target_group_arn = aws_lb_target_group.this.arn
}
}
# When no custom domain is configured, the ALB only gets an HTTP (port 80)
# listener above — there's no way to get a browser-trusted HTTPS certificate
# for its default *.elb.amazonaws.com hostname without owning that domain.
# A frontend served over HTTPS (CloudFront) then can't call it at all:
# browsers silently block the request as mixed content. Front it with
# CloudFront instead, the same trick modules/frontend_hosting uses for its
# S3 bucket — CloudFront's own *.cloudfront.net domain gets automatic
# trusted HTTPS with zero custom-domain setup, and passes both the HTTP
# GraphQL endpoint and WebSocket subscriptions through to the origin
# unchanged. Only needed here in the no-custom-domain path; with a custom
# domain the ALB already terminates HTTPS directly via the listener above.
resource "aws_cloudfront_distribution" "this" {
count = var.domain_name == null ? 1 : 0
enabled = true
comment = "${local.name}: HTTPS front for the HTTP-only ALB (no custom domain configured)"
origin {
domain_name = aws_lb.this.dns_name
origin_id = "hasura-alb"
custom_origin_config {
http_port = 80
https_port = 443
origin_protocol_policy = "http-only"
origin_ssl_protocols = ["TLSv1.2"]
}
}
default_cache_behavior {
allowed_methods = ["GET", "HEAD", "OPTIONS", "PUT", "POST", "PATCH", "DELETE"]
cached_methods = ["GET", "HEAD"]
target_origin_id = "hasura-alb"
viewer_protocol_policy = "https-only"
compress = true
forwarded_values {
query_string = true
headers = ["Authorization", "Content-Type", "X-Hasura-Admin-Secret", "X-Hasura-Role"]
cookies {
forward = "none"
}
}
# GraphQL responses are per-request/per-user — never cache.
min_ttl = 0
default_ttl = 0
max_ttl = 0
}
restrictions {
geo_restriction {
restriction_type = "none"
}
}
viewer_certificate {
cloudfront_default_certificate = true
}
}
resource "aws_ecs_service" "this" {
name = local.name
cluster = aws_ecs_cluster.this.id
task_definition = aws_ecs_task_definition.this.arn
desired_count = var.desired_count
launch_type = "FARGATE"
# Without this, `terraform apply` returns as soon as ECS accepts the new
# task definition — not once the new task is actually healthy and serving
# traffic. Every Hasura config change (JWT secret, unauthorized role, ...)
# otherwise looks "applied" while the old task is still what's live behind
# the ALB for another minute or two.
wait_for_steady_state = true
network_configuration {
subnets = var.private_subnet_ids
security_groups = [var.task_security_group_id]
assign_public_ip = false
}
load_balancer {
target_group_arn = aws_lb_target_group.this.arn
container_name = "hasura"
container_port = 8080
}
depends_on = [aws_lb_listener.http]
}