v.23.7Improvement

Update Certificates Automatically Without Manual System Reload

Update certificates when they change without the need to manually SYSTEM RELOAD CONFIG. #52030 (Mike Kot).
ClickHouse now automatically updates TLS certificates when they change, eliminating the need for manual configuration reloads.

Why it matters

This feature addresses the problem of manually reloading the server configuration to apply updated TLS certificates, which can be disruptive and error-prone. By automatically detecting and reloading changed certificates, ClickHouse ensures secure connections are maintained seamlessly and reduces operational overhead.

How to use it

Users simply need to replace the TLS certificate files on disk as usual. ClickHouse will detect these changes and reload the certificates automatically without requiring a SYSTEM RELOAD CONFIG command.