⭐ StartClickhouse

StartClickhouse provisions ClickHouse databases through the same 7-step pipeline every engine follows (see StartActions Overview) — with one exception. ClickHouse's own specifics, including that exception, are covered in the database-provisioning-engines.html, alongside the other 7 engines, rather than repeated here.

The exception: ClickHouse is the only engine with no SSL/TLS support at all — there's no enable_ssl handling anywhere in StartClickhouse.php, unlike every other engine's integration with the shared SSL Subsystem. That's not an oversight to fix by copying the other engines' pattern; it's simply not implemented for this engine yet. ClickHouse's container is also the only one started with raised nofile ulimits (262144), for its own I/O needs.