Moving AuthOS Rust Builds Out of Docker with cargo-zigbuild

Sat, 10 Jan 2026 11:00:00 +0300

Our AuthOS release process built three Rust binaries: one each for SQLite, PostgreSQL, and MySQL. We built every variant in a multi-stage Dockerfile, so publishing a version meant waiting for the same expensive compilation boundary three times.

A typical build took 15–20 minutes. Across the three variants, a release could occupy 45–60 minutes.

The problem was not that Docker cannot cache Rust builds. BuildKit supports persistent cache mounts for Cargo’s registry and target directory. Our Dockerfile simply did not use them effectively: it copied the project and ran a release build in a layer that source changes invalidated.

Cross-Compilation on DRM HSE

Moving AuthOS Rust Builds Out of Docker with cargo-zigbuild