Scalingo provides a subdomain of
scalingo.io for all applications to access your application.
Of course, you may want to use your own domain name. This operation requires different
Buy a domain name
We do not sell domain names. You can buy one from a company which sells them (called registrar) such as:
- DNS Simple - https://dnsimple.com/
- OVH - https://www.ovh.com
- Gandi - https://www.gandi.net
You can find an exhaustive list of registrars on the ICANN website. The process is pretty similar with any of these services. You search for the availability of the domain and if it is available, you can buy it per year.
Configure your application
Using our CLI
scalingo --app my-app domains-add <domain name>
Using the web dashboard
Go to the ‘Domains’ tab of your app dashboard, fill the ‘Domain Name’ text field and validate by clicking on ‘Link domain name to the app’.
Configure your domain name
After having bought a domain name you need to configure it. Most of the
registrars provide a web dashboard to do so. To target your application
hosted on Scalingo, you need to create a
CNAME field targeting the
fully qualified domain name (FQDN)
The raw configuration line to create an alias between
NAME TTL TYPE FIELD TARGET www 10800 IN CNAME my-app.scalingo.io.
After this configuration is completed, a Let’s Encrypt certificate is automatically generated for your application.
Most of the registrars only allow
A field for root domains. However
A should target an IP. As Scalingo
don’t ensure that our front IP addresses won’t change over time, we advise you to use a subdomain for your
application or to migrate your domain name to another DNS provider.
Some providers allow to create
CNAME field for root domains:
- DNSimple (ALIAS)
- DNS Made Easy (ANAME)
- easyDNS (ANAME)
- CloudFlare (CNAME)
- PointDNS (ALIAS)
If you want to keep your registrar which is not compatible with root domain
aliases, you can create a
A field targeting our web entry point
220.127.116.11. This IP may change in the future, in this case you’ll get an
email at least 30 days in advance to let you know you have to change your
You may want to redirect all subdomains of your domain to a specific Scalingo application. To achieve this you’ve to add a domain name with the form:
Then all requests targeting for instance
admin.example.com will be
redirected to this specific application.
If an application has the wildcard domain
*.example.com configured and that another application
admin.example.com, the wildcard will not override the
admin subdomain. Actually, any
complete subdomain will have priority over the wildcard.
If you need to redirect all the subdomains to Scalingo servers, you need to setup your DNS accordingly, it’s really close to configuring a single domain name:
NAME TTL TYPE FIELD TARGET * 10800 IN CNAME my-app.scalingo.io.
When you add an alias, we don’t do any prior verification. If you cannot add your alias because it’s already taken on Scalingo and you think you’re legit to use it, send an email to email@example.com describing the problem.
After defining multiple domains on an application, one can need to redirect all requests towards its application to a specific domain. This domain is called the canonical domain. The canonical domain can be defined in the Settings tab of the dashboard.
Note that when a wildcard domain is defined for an application, a second domain
must be added to be set as canonical. For instance, let’s say that
*.example.com is in the list of domains of an app. If
the wanted canonical domain, it must be added to the list of domains to be
selectable as a canonical domain.
The redirection to the canonical domain will be made with a HTTP 301 status code.