Multiple Drupal sites in a single Project
Platform.sh supports running multiple applications multiple applications in the same project, and these can be two or more Drupal sites. But they would be separate Drupal instances: they will have their assets separate and live their lives apart, and it would be much better for them not to share the same database (though they could).
Platform.sh actively discourages running Drupal in “multisite” mode. Doing so eliminates many of the advantages Platform.sh offers, such as isolation and safe testing. Additionally, because of the dynamic nature of the domain names that are created for the different environments, the multisite configuration would be complex and fragile.
The only reason to use Drupal Multisite would be to manage a series of nearly-identical sites with separate databases. For that case we have built a template repository that uses a unified lookup key for a subdomain, database name, and file paths. Note that it will likely require modification for your specific setup and some configurations may require a different approach.
In particular, this example:
- Defines two MySQL databases.
- Uses a modified
settings.platformsh.phpthat accepts a key variable from
settings.phpto specify which database and file system paths to use.
- Extracts the the
sitesdirectory to use from the domain.