RDS multi AZ (#8)

* update readme

* ensure publicly_accessible is a boolean

* allow setting multi_az (defaults to false)

rds/README.md

@@ -7,16 +7,22 @@ Used for creating and configuring databases and their networking.
 
 ```
 module "db" {
-  source = "github.com/dbl-works/terraform//rds"
-
-  vpc_id = "vpc-123"
-  project = "someproject"
-  environment = "staging"
-  password = "xxx"
-  subnet_ids = [ "subnet-1", "subnet-2" ]
-  kms_key_arn = "arn:aws:kms:eu-central-1:12345678:key/xxx-xxx"
-
+  source = "github.com/dbl-works/terraform//rds?ref=v2021.07.01"
+
+  vpc_id                     = "vpc-123"
+  project                    = "someproject"
+  environment                = "staging"
+  password                   = "xxx"
+  kms_key_arn                = "arn:aws:kms:eu-central-1:12345678:key/xxx-xxx"
+  subnet_ids                 = ["subnet-1", "subnet-2"]
   allow_from_security_groups = [module.ecs.ecs_security_group_id]
+
+  # optional
+  instance_class      = "db.t3.micro"
+  engine_version      = "13.2"
+  publicly_accessible = false
+  allocated_storage   = 100
+  multi_az            = false
 }
 ```
 

rds/rds.tf

@@ -11,7 +11,7 @@ resource "aws_db_instance" "main" {
   password = var.password
   parameter_group_name = aws_db_parameter_group.postgres13.name
   apply_immediately = true
-  multi_az = false
+  multi_az = var.multi_az
   publicly_accessible = var.publicly_accessible
   deletion_protection = true
   vpc_security_group_ids = [

rds/variables.tf

@@ -6,9 +6,18 @@ variable "environment" {}
 
 variable "instance_class" { default = "db.t3.micro" }
 variable "engine_version" { default = "13.2" }
-variable "publicly_accessible" { default = false }
 variable "allocated_storage" { default = 100 }
 
+variable "publicly_accessible" {
+  type    = bool
+  default = false
+}
+
+variable "multi_az" {
+  type    = bool
+  default = false
+}
+
 # Credentials for the root RDS user
 # Only to be used in initial setup, never by applications
 variable "username" { default = "root" }