Sni endpoint error when adding domain (heroku)

Question

I'm trying to add a custom domain name to my heroku app and I'm seemingly using the correct command to do this, at least according to heroku docs.

heroku domains:add domain.com -a heroku-app

But I'm getting the following error.

Error: Require params: sni_endpoint.
Error ID: invalid params

I was unable to find this error on google in relation to my case. I'd appreciate any assistance with this. Thanks!

Answer 1

https://devcenter.heroku.com/changelog-items/1938

Beginning October 31, 2020, API requests to the Domain Create endpoint will accept an additional sni_endpoint parameter. This is a new attribute that can either be:

• A reference to a valid SNI endpoint or,
• null if the domain should not be associated with an SNI endpoint.

On November 1, 2021, the API will respond with 422 errors if no sni_endpoint parameter is provided.

Answer 2

Their documentation and their error reporting is terrible.

Basically, as of Nov 1, 2021, you have to tack on the "--cert" parameter and provide the name of your cert (sni_endpoint).

So, first, manually look up your sni_endpoint(s) by running:

heroku domains --app your-app-name

This will provide of list of all of your current domains/subdomains and the sni_endpoint(s) for each of them.

Then, add your new subdomain with:

heroku domains:add yoursubdomain.yourdomain.com --app your-app-name --cert your_sni_endpoint_name

Answer 3

I solved the problem updating the heroku cli from 7.59.o to 7.59.2 .

In your terminal run: sudo npm update -g heroku

once updated, I run:

heroku domains:add www.YOURDOMAIN.com --app YOUR_HEROKU_APP_NAME

Example:

Domain www.myverygooddomain.com My Heroku app name: my-great-app Command: heroku domains:add www.myverygooddomain.com --app my-great-app