Amazon web services 如何使用Terraform进行CloudFront源站故障切换？

我已在管理控制台中成功设置CloudFront源故障切换。我想知道如何使用Terraform做同样的事情

这是一个非常简单的设置，两个原点，一个原点组，一个主原点和一个次原点。

Terraform在文档中提供了这方面的详细说明

如果您从下面这样一个简单的CloudFront资源开始

resource "aws_cloudfront_distribution" "s3_distribution" {    
  origin {
    domain_name = "${aws_s3_bucket.primary.bucket_regional_domain_name}"
    origin_id   = "primaryS3"

    s3_origin_config {
      origin_access_identity = "${aws_cloudfront_origin_access_identity.default.cloudfront_access_identity_path}"
    }
  }

  default_cache_behavior {
    # Note: Origin set to the single origin.
    target_origin_id = "primaryS3" 
  }
}

然后，添加源故障切换配置相当容易

添加次原点

将其与主要成员分组（成员顺序很重要）

将默认原点设置为组

以下是一个示例（来自文档）：

resource "aws_cloudfront_distribution" "s3_distribution" {
  origin_group {
    origin_id = "groupS3"

    failover_criteria {
      status_codes = [403, 404, 500, 502]
    }

    member {
      origin_id = "primaryS3"
    }

    member {
      origin_id = "failoverS3"
    }
  }

  # Primary Origin
  origin {
    domain_name = "${aws_s3_bucket.primary.bucket_regional_domain_name}"
    origin_id   = "primaryS3"

    s3_origin_config {
      origin_access_identity = "${aws_cloudfront_origin_access_identity.default.cloudfront_access_identity_path}"
    }
  }

  # Secondary Origin
  origin {
    domain_name = "${aws_s3_bucket.failover.bucket_regional_domain_name}"
    origin_id   = "failoverS3"

    s3_origin_config {
      origin_access_identity = "${aws_cloudfront_origin_access_identity.default.cloudfront_access_identity_path}"
    }
  }

  default_cache_behavior {
    # Important, use the failover group instead of the primary origin.
    target_origin_id = "groupS3" 
  }
}