如何在 terraform 中将 rds 与弹性 beantalk 连接

Question

我有使用 terraform 创建弹性 beantalk 的代码，这是我在 terraform 文档中找到的用于创建 rds 实例的代码

resource "aws_db_instance" "default" {
  allocated_storage    = 10
  db_name              = "mydb"
  engine               = "mysql"
  engine_version       = "5.7"
  instance_class       = "db.t3.micro"
  username             = "foo"
  password             = "foobarbaz"
  parameter_group_name = "default.mysql5.7"
  skip_final_snapshot  = true
}

问题是我找不到如何将此数据库连接到弹性 beanstalk 的示例

Answer 1

我认为setting选项应该是 go 的方式，即，您可能不需要单独的资源来创建数据库。 基于 AWS 文档 [1]，并使用 terraform 示例 [2]，它应该类似于：

resource "aws_elastic_beanstalk_application" "tftest" {
  name        = "tf-test-name"
  description = "tf-test-desc"
}

resource "aws_elastic_beanstalk_environment" "tfenvtest" {
  name                = "tf-test-name"
  application         = aws_elastic_beanstalk_application.tftest.name
  solution_stack_name = "64bit Amazon Linux 2015.03 v2.0.3 running Go 1.4"

  setting {
    namespace = "aws:rds:dbinstance"
    name      = "DBAllocatedStorage"
    value     = "10"
  }

  setting {
    namespace = "aws:rds:dbinstance"
    name      = "DBDeletionPolicy"
    value     = "Delete"
  }

  setting {
    namespace = "aws:rds:dbinstance"
    name      = "HasCoupledDatabase"
    value     = "true"
  }

  setting {
    namespace = "aws:rds:dbinstance"
    name      = "DBEngine"
    value     = "mysql"
  }

  setting {
    namespace = "aws:rds:dbinstance"
    name      = "DBEngineVersion"
    value     = "5.7"
  }

  setting {
    namespace = "aws:rds:dbinstance"
    name      = "DBInstanceClass"
    value     = "db.t3.micro"
  }

  setting {
    namespace = "aws:rds:dbinstance"
    name      = "DBPassword"
    value     = "foobarbaz"
  }

  setting {
    namespace = "aws:rds:dbinstance"
    name      = "DBUser"
    value     = "foo"
  }
}

但是，我不确定这里是否可以设置parameter_group_name 。

编辑：更新答案以使用 ElasticBeanstalk 环境创建数据库实例。 但是，请确保从文档中了解有关HasCoupledDatabase设置的这一部分：

注意：如果在分离之前的数据库后将此值切换回true ，Elastic Beanstalk 会使用之前的数据库选项设置创建一个新数据库。 但是，为了维护环境的安全，它不会保留现有的 DBUser 和 DBPassword 设置。 您需要再次指定 DBUser 和 DBPassword 。

---

[1] https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/command-options-general.html#command-options-general-rdsdbinstance

[2] https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/elastic_beanstalk_environment#option-settings