Adding a Domain to Google Cloud Run

I have unfortunately decided to swallow my pride and use the Google Cloud UI for this one.

Step 1: Set Up Domain Mapping

• Go to the google cloud console -> select the Cloud Run service.

• Click "Manage custom domains"

• CLick Add Mapping -> "Add service domain mapping"

• Select the service you want to map to -> select your deployed project.

• Enter your domain name -> Click "Continue"

• Google Cloud will generate DNS records -> copy these

Step 2: Update DNS Settings in Your Domain Host**

• Go to your domain provider (Cloudflare, Namecheap, Google Domains, etc.).

• Paste the DNS records exactly as given.

• If you are using Cloudflare, set your records to "DNS Only" (disabling proxy mode) so Google can verify them.

Step 3: Verify the DNS Changes

• While waiting, feel free to test your domain name on nslookup.io.
• If the IPv4 and IPv6 addresses matches what Google gave you, then you're good.

Bonus: Enable Subdomains

• Bonus: in your domain host DNS settings, add * as a host, CNAME as type and ghs.googlehosted.com if you want subdomains.

-Now any subdomain (blog.yourdomain.com, api.yourdomain.com, etc.) will automatically work.

Fix: If Your Cloud Run Region Doesn’t Support Domain Mapping

🔥 If you see:

❌ "Domain mappings are not available in this region."

💀 Google Cloud decided your region isn’t good enough.

• Just edit the YAML file in your repository to switch to a supported one.

• Commit and push the change.

• In your Cloud Run services, remove the old container.