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Every application is reachable over HTTPS as soon as it is deployed, on an address generated from the public IP of your instance. That address is meant for testing; for production, attach your own domain name.

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Automatic HTTPS

The generated address already carries a Let’s Encrypt certificate, issued and renewed by the platform. The same applies to a custom domain: once the domain resolves to your instance, the certificate is requested automatically.

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Add a domain

Prerequisites
  • A domain name you control
  • The application deployed and running
1

Open the Domains tab

Open the application, then select the Domains tab.
2

Enter the domain

Type the host name to attach, for example app.example.com. The console checks it as you type and tells you what will happen.
3

Choose the service

An application made of several services asks which one receives the domain.
4

Apply

Select Add. The task applies the domain and the certificate is issued shortly after.

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Two cases

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The DNS zone is managed at OnetSolutions

If the parent domain has a DNS zone in the same organization, the console says so and creates the A record for you. Nothing to do on your side. The record points to the public IPv4 address of the instance, with a 300 second TTL. An existing A record with a different value is updated, and its previous value is kept in the application history.
A CNAME record on the same name, or several A records, block the operation. Remove them from your DNS zone first.

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The DNS zone is elsewhere

If the domain is hosted at another provider, the console shows the IP address to point to. Create an A record at your registrar, then add the domain: the console verifies that the name resolves to your instance before applying it. DNS propagation can take from a few minutes to a few hours. If verification fails right after you create the record, wait and try again.

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Remove a domain

Removing a domain from the list and applying the change detaches it from the application. The DNS record itself is not deleted: remove it from your zone if you no longer need it.