Expose your applications on the internet with clean, secure URLs
When deploying applications on Red Hat OpenShift Service on AWS (ROSA), you often want users to access them through a familiar, branded URL — not a long, machine-generated one. That’s where custom domains come in.
Let’s simplify what this means and how to set it up — no code involved.
🔎 What is a Custom Domain?
By default, when you deploy an app in ROSA, it’s given a generic address like:
myapp-default.apps.randomstring.openshiftapps.com
This works, but it’s not ideal for users or businesses.
A custom domain lets you use something user-friendly and on-brand, like:
app.mycompany.com
✅ Why You Should Use Custom Domains
Here’s why it’s worth doing:
Better branding: Your domain matches your company name.
User-friendly: Easier to remember, type, and share.
Improved security: Use your own SSL certificates and HTTPS.
Professional image: Especially important for customer-facing apps.
🛠️ What You Need
To use a custom domain with ROSA, you’ll need:
A registered domain name (like mycompany.com)
Access to your DNS provider (like GoDaddy, AWS Route 53, Cloudflare)
Your ROSA cluster’s public hostname or IP (your cloud/infra team usually provides this)
🚀 Steps to Set Up (In Simple Terms)
Pick your subdomain
Choose something clean like apps.mycompany.com or portal.mycompany.com.
Create a wildcard DNS entry
Go into your domain provider and point everything under that subdomain (like *.apps.mycompany.com) to your ROSA cluster’s external address.
Ask your platform team to update the route
Your app’s route needs to use the new custom domain. This part’s handled inside OpenShift, and your DevOps team can take care of it.
Secure it with HTTPS
You’ll want SSL certificates for your domain to ensure secure access. Your team can use Let’s Encrypt or upload your organization’s certificates.
🔐 Secure Your Routes
Always make sure your applications are using HTTPS, not HTTP. This protects your users and builds trust. ROSA supports different types of secure connections — your team will pick what fits your setup best.
👍 Best Practices
Use short, clear subdomains for different apps
(e.g., api.mycompany.com, login.mycompany.com)
Keep SSL certificates updated automatically
Test your domain before going live
Monitor for downtime or DNS issues
💡 Final Thought
Using custom domains in ROSA is a small configuration change that delivers big benefits: it makes your applications look polished, trustworthy, and easier to use. Whether you're building internal tools or public platforms, this step moves you closer to production-ready.
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