rstartd

rstartd [command ...]

command ...
    The command(s) to execute as the main process within the container. rstartd will execute these commands directly.

rstartd is a lightweight, simple init system designed for use in containerized environments. It acts as a replacement for init (PID 1) within a container, managing the startup and shutdown of processes. Its primary goal is to handle zombie process reaping and signal forwarding to child processes. Rstartd is particularly useful when you need a basic init system without the overhead of a full-fledged systemd or similar init daemon. It aims to provide a minimal and reliable solution for process management within containers.

Rstartd monitors its child processes, forwarding signals like SIGTERM and SIGINT to ensure graceful shutdown. It also reaps zombie processes to prevent resource leaks. While it doesn't offer the advanced features of more complex init systems (like dependency management or service monitoring), rstartd provides a crucial function for well-behaved containers. It is often used in lightweight containers where a full init system is unnecessary.

rstartd offers a limited set of features compared to full init systems. It doesn't provide dependency management, service monitoring, or extensive logging capabilities.

rstartd forwards signals it receives to its child processes. This allows for graceful shutdown of the container by sending signals like SIGTERM or SIGINT to the main process.

rstartd automatically reaps zombie processes, preventing them from accumulating and consuming system resources. This is a crucial function for maintaining container stability.

init(8), systemd(1)