chore(elasticache): add serverless redis (#5943)

infra/terraform/elasticache.tf

@@ -89,3 +89,50 @@ module "valkey" {
 
   tags = local.tags_map[each.key]
 }
+
+module "elasticache_user_group" {
+  for_each = local.envs
+  source   = "terraform-aws-modules/elasticache/aws//modules/user-group"
+  version  = "1.4.1"
+
+  user_group_id       = "${each.value}-valkey"
+  create_default_user = false
+  default_user = {
+    user_id   = each.value
+    passwords = [random_password.valkey[each.key].result]
+  }
+  users = {
+    "${each.value}" = {
+      access_string = "on ~* +@all"
+      passwords     = [random_password.valkey[each.key].result]
+    }
+  }
+  engine = "redis"
+  tags = merge(local.tags, {
+    terraform-aws-modules = "elasticache"
+  })
+}
+
+module "valkey_serverless" {
+  for_each = local.envs
+  source   = "terraform-aws-modules/elasticache/aws//modules/serverless-cache"
+  version  = "1.4.1"
+
+  engine               = "valkey"
+  cache_name           = "${each.value}-valkey-serverless"
+  major_engine_version = local.valkey_major_version
+  # cache_usage_limits = {
+  #   data_storage = {
+  #     maximum = 2
+  #   }
+  #   ecpu_per_second = {
+  #     maximum = 1000
+  #   }
+  # }
+  subnet_ids = module.vpc.database_subnets
+
+  security_group_ids = [
+    module.valkey_sg.security_group_id
+  ]
+  user_group_id = module.elasticache_user_group[each.key].group_id
+}

infra/terraform/rds.tf

@@ -3,7 +3,7 @@
 ################################################################################
 data "aws_rds_engine_version" "postgresql" {
   engine  = "aurora-postgresql"
-  version = "16.4"
+  version = "16.6"
 }
 
 moved {
@@ -64,9 +64,8 @@ module "rds-aurora" {
   enable_http_endpoint = true
 
   serverlessv2_scaling_configuration = {
-    min_capacity             = 0
-    max_capacity             = 50
-    seconds_until_auto_pause = 3600
+    min_capacity = 0.5
+    max_capacity = 50
   }
 
   instance_class = "db.serverless"

infra/terraform/secrets.tf

@@ -18,7 +18,7 @@ resource "aws_secretsmanager_secret_version" "formbricks_app_secrets" {
   for_each  = local.envs
   secret_id = aws_secretsmanager_secret.formbricks_app_secrets[each.key].id
   secret_string = jsonencode({
-    REDIS_URL = "rediss://:${random_password.valkey[each.key].result}@${module.valkey[each.key].replication_group_primary_endpoint_address}:6379"
+    REDIS_URL = "rediss://${each.value}:${random_password.valkey[each.key].result}@${module.valkey_serverless[each.key].serverless_cache_endpoint[0].address}:6379"
   })
 }