Supervisors

I found a good series of blogs posts on supervisors today for Unix systems.

Most, but not all, supervisors typically run as PID 1.

daemontools #

It seems that daemontools was one of, if not the first, supervisor.

daemontools-encore #

A fork of daemontools is daemontools-encore.

runit #

From the runit site:

runit is a cross-platform Unix init scheme with service supervision

supervisord #

A summary of supervisord:

It shares some of the same goals of programs like launchd, daemontools, and runit. Unlike some of these programs, it is not meant to be run as a substitute for init as “process id 1”. Instead it is meant to be used to control processes related to a project or a customer, and is meant to start like any other program at boot time.

perp #

perp runs in userland. You can install it locally or systemwide, and also run it multiple times against different base folders.

s6 #

s6 is more recent and looks interesting vs. perp.

nosh #

nosh is:

…a suite of system-level utilities for initializing and running a BSD or Linux system, for managing daemons, for managing terminals, and for managing logging.