Oxy: the journey of graceful restarts

What this post added

This post details the implementation of a graceful restart mechanism for Oxy, a Rust-based proxy framework. It addresses the limitations of existing solutions like 'tableflip' by leveraging systemd for socket activation and a custom-built WaitGroup equivalent using Tokio's MPSC channels. A key innovation is the use of a Unix socket for coordinating restarts, allowing for configuration validation and feedback to a restarter process, thus improving failure detection and root cause analysis.