Custom domain name for Container app

[KSemenenko]

I think we need an option to setup custom domain name for Container app
https://learn.microsoft.com/en-us/azure/container-apps/custom-domains-certificates

[KSemenenko]

https://learn.microsoft.com/en-us/azure/container-apps/environment-custom-dns-suffix
or domain name for environment

[mitchdenny]

We'll probably have this partially solved with the stuff that @davidfowl is doing around Bicep template support. But the trick will be how we tell the container app to apply the custom domain. This would probably be a good use of metadata.

[KSemenenko]

As I understands it’s impossible to do with bicep, because there is a step for validation, but it means app should be up an d running.
Maybe it’s possible with mix mix of bixep to create resource, and then one more action to bind cert and domain

[davidfowl]

This is going to be out of scope for automatic deployment via aspire for GA.

[adanbrownpaca]

My first Aspire app is now deployed to production. Yup, this is a problem. Each time we update the deployment, the container loses the custom domain information. Public domain, of course. I'll follow this issue as it is a critical problem that every company will have.

[davidfowl]

azd is looking to work around this issue with an opt in feature Azure/azure-dev#3955

[rudiv]

Until that feature lands, @adanbrownpaca you can use azd infra synth to correct this in the relevant container app's YAML file (they go in to /infra/{project}.tmpl.yaml).

Under ingress, add customDomains as so:

      customDomains:
        - name: { DomainName }
          bindingType: SniEnabled
          certificateId: "{{ .Env.AZURE_CONTAINER_APPS_ENVIRONMENT_ID }}/managedCertificates/{ Certificate Id }"

Making sure, of course, to replace the single { } with actual values. You can retrieve the certificate ID by using az container app env certificate list.

Note that you'll have to do this after the first deployment and manual configuration from portal. There's a wider issue with the Bicep support for ACA that isn't yet fixed that prevents even third party Bicep writing tools to implement this. See microsoft/azure-container-apps#796

[adanbrownpaca]

Thanks @rudiv - will do.

[davidfowl]

Or you can use the daily build of azd and test the feature out 😄

[adanbrownpaca]

Two birds... got it! Will do @davidfowl