This article explains how to fix the SSLPri.MissingParameter error that occurs when you add an HTTPS certificate while creating a CDN-accelerated domain name with Terraform.
Error message
Terraform returns the following error:
│ Error: [ERROR] terraform-provider-alicloud/alicloud/resource_alicloud_cdn_domain_new.go:576: Resource public1.sige-test3.com SetCdnDomainSSLCertificate Failed!!! [SDK alibaba-cloud-sdk-go ERROR]:
│ SDKError:
│ StatusCode: 400
│ Code: SSLPri.MissingParameter
│ Message: code: 400, The SSLPri parameter is required. request id: F5512B73-4FCE-56DD-8F05-19BA81C701F1
│ Data: {"Code":"SSLPri.MissingParameter","HostId":"cdn.aliyuncs.com","Message":"The SSLPri parameter is required.","Recommend":"https://api.alibabacloud.com/troubleshoot?intl_lang=EN_US&q=SSLPri.MissingParameter&product=Cdn&requestId=F5512B73-4FCE-56DD-8F05-19BA81C701F1","RequestId":"F5512B73-4FCE-56DD-8F05-19BA81C701F1"}
│
│ with alicloud_cdn_domain_new.default,
│ on main.tf line 1, in resource "alicloud_cdn_domain_new" "default":
│ 1: resource "alicloud_cdn_domain_new" "default"Cause
When using alicloud_cdn_domain_new with cert_type set to cas (Alibaba Cloud Certificate Center), the cert_region parameter must match your account type:
| Account type | Required cert_region value | Notes |
|---|---|---|
| International site | ap-southeast-1 | Must be set explicitly. Omitting this parameter causes the SSLPri.MissingParameter error. |
| China site | cn-hangzhou | This is the default value. No explicit setting required. |
For the full parameter reference, see alicloud_cdn_domain_new.

Solution
In your alicloud_cdn_domain_new resource, set cert_type to cas and add the cert_region parameter to the certificate_config block with the value that corresponds to your account type.
The following example shows a complete configuration for an international site account:
# Add an accelerated domain name.
resource "alicloud_cdn_domain_new" "domain" {
domain_name = "mycdndomain.alicloud-provider.cn"
cdn_type = "download"
scope = "overseas"
sources {
content = "myoss.oss-rg-china-mainland.aliyuncs.com"
type = "oss"
priority = "20"
port = 80
weight = "15"
}
# Configure a certificate.
# cert_id: To obtain a certificate ID, purchase or upload a certificate in Alibaba Cloud Certificate Center first.
# cert_type="cas" uses a certificate from Alibaba Cloud Certificate Center.
# cert_region="ap-southeast-1" targets Alibaba Cloud Certificate Center for the international site.
# International site accounts must set cert_region explicitly. China site accounts can omit this parameter.
certificate_config {
cert_id = "1111111"
cert_name = "cert-2987438279834"
cert_type = "cas"
cert_region = "ap-southeast-1"
}
}