乱读天书，不求甚解

周祎骏的个人云笔记

乱读天书，不求甚解

Terraform 7.02 depends_on

2023-10-04 12:53:53 22 0 0

admin

> 资源之间的依赖关系

优先使用References to Named Values 来避免修改plan

# 官方例子
https://developer.hashicorp.com/terraform/language/meta-arguments/depends_on
```
resource "aws_iam_role" "example" {
  name = "example"

# assume_role_policy is omitted for brevity in this example. Refer to the
  # documentation for aws_iam_role for a complete example.
  assume_role_policy = "..."
}

resource "aws_iam_instance_profile" "example" {
  # Because this expression refers to the role, Terraform can infer
  # automatically that the role must be created first.
  role = aws_iam_role.example.name
}

resource "aws_iam_role_policy" "example" {
  name   = "example"
  role   = aws_iam_role.example.name
  policy = jsonencode({
    "Statement" = [{
      # This policy allows software running on the EC2 instance to
      # access the S3 API.
      "Action" = "s3:*",
      "Effect" = "Allow",
    }],
  })
}

resource "aws_instance" "example" {
  ami           = "ami-a1b2c3d4"
  instance_type = "t2.micro"

# Terraform can infer from this that the instance profile must
  # be created before the EC2 instance.
  iam_instance_profile = aws_iam_instance_profile.example

# However, if software running in this EC2 instance needs access
  # to the S3 API in order to boot properly, there is also a "hidden"
  # dependency on the aws_iam_role_policy that Terraform cannot
  # automatically infer, so it must be declared explicitly:
  depends_on = [
    aws_iam_role_policy.example
  ]
}
```

上一篇: Terraform 6.1 模块基础使用

下一篇: Terraform 7.03 count_AND_for_each

文档导航