Platform.sh automatically provides standard TLS certificates issued by Let's Encrypt to all production instances. No further action is required to use TLS-encrypted connections beyond specifying HTTPS routes in your
Alternatively, you may provide your own third party TLS certificate from the TLS issuer of your choice at no charge from us. Please consult your TLS issuer for instructions on how to generate an TLS certificate.
A custom certificate is not necessary for development environments. Platform.sh automatically provides wildcard certificates that cover all *.platform.sh domains, including development environments.
note The private key should be in the old style, which means it should start with BEGIN RSA PRIVATE KEY. If it starts with BEGIN PRIVATE KEY that means it is bundled with the identifier for key type. To convert it to the old-style RSA key:
openTLS rsa -in private.key -out private.rsa.key
You can add a custom certificate via the Platform.sh Web Interface. Just go to the project configuration page in the web interface and click on Domains. If you already have a domain, you can edit the domain and then click on the Add TLS certificate button. You can then add your private key, public key certificate and optional certificate chain.
platform domain:add secure.example.com --cert=/etc/TLS/private/secure-example-com.crt --key=/etc/TLS/private/secure-example-com.key
platform help domain:add for more information.
Success! Your site should now be live, and accessible to the world (as soon as the DNS propagates).
If something is not working see the troubleshooting guide for common issues. If that doesn't help feel free to contact support.