Hi, I’ve done the following: Created a custom docker container containing a django webapp fronted by gunicorn. Created a container registry in digital ocean and uploaded the image there. Created an app platform using that docker image. Checked that this image runs using the inbuilt domain. Everything works and the app runs!However, I’ve now bought a domain from an external domain provider. I’ve added that to my app platform using the “We manage your domain” option and the networking tab tells me (after a bit of a wait) that digital ocean is happy it now can serve the domain. However, my app platform no longer works. Clicking on the old URL gives me a 400 bad gateway and clicking on the new domain gives me an SSL error (SSL_ERROR_INTERNAL_ERROR_ALERT on firefox). Are there other steps I need to take (e.g. in the spec file) to link up the SSL config for my custom domain? Thanks

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Question

App platform docker failing SSL with custom domain

Posted on January 20, 2025

DigitalOcean App Platform

App Platform

By Brave Tomato

Hi,

I’ve done the following:

Created a custom docker container containing a django webapp fronted by gunicorn.
Created a container registry in digital ocean and uploaded the image there.
Created an app platform using that docker image.
Checked that this image runs using the inbuilt domain. Everything works and the app runs! However, I’ve now bought a domain from an external domain provider. I’ve added that to my app platform using the “We manage your domain” option and the networking tab tells me (after a bit of a wait) that digital ocean is happy it now can serve the domain.

However, my app platform no longer works. Clicking on the old URL gives me a 400 bad gateway and clicking on the new domain gives me an SSL error (SSL_ERROR_INTERNAL_ERROR_ALERT on firefox). Are there other steps I need to take (e.g. in the spec file) to link up the SSL config for my custom domain?

Thanks

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Bobby Iliev

January 21, 2025

Hi there,

This might have been a temporary hiccup, are you still seeing the issue?

Also, after setting your domain, did you also update the ALLOWED_HOSTS in your Django settings.py file to include your custom domain and the App Platform URL?

If you’ve defined the allowed hosts already and you are still seeing the issue, you could also reach out to the DigitalOcean support team who will be able to further investigate this for you as well: