Re: [ANN] nitro 0.5, a tiny but flexible init system and process supervisor

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From: Demi Marie Obenour <[email protected]>
To: Leah Neukirchen <[email protected]>, [email protected]
Message-ID: <[email protected]>
Subject: Re: [ANN] nitro 0.5, a tiny but flexible init system and process
 supervisor
References: <[email protected]>
In-Reply-To: <[email protected]>

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On 10/17/25 08:55, Leah Neukirchen wrote:
> Hello,
>=20
> I'm happy to announce a new release of "nitro", a new supervisor akin
> to daemontools/runit/perp/s6.
>=20
> These are the main applications nitro is designed for:
> - As init for a Linux or NetBSD machine for embedded, desktop or
>   server purposes
> - As init for a Linux initramfs
> - As init for a Linux container (Docker/Podman/LXC/Kubernetes)
> - As unprivileged supervision daemon on generic POSIX systems
>=20
> nitro 0.5 is pretty much feature complete and now supports (relative
> to the the previous release announcement):
> - usage as NetBSD init
> - s6-compatible readiness notification
> - event-driven nitroctl which can perform multiple actions in parallel
> - improved usability and robustness
> - new test suite, which passes on new and old Linux, FreeBSD, NetBSD, O=
penBSD

Do you plan to support cgroups on Linux?  Those allow for much
more robust supervision, including of daemons that do nasty things
like double-fork.  It's also necessary to be able to terminate child
daemons reliably without the use of PID namespaces.

As an aside, by running as PID 1 nitro is able to reliably wait for
a child and all its descendants to stop running, so long as the child
is PID 1 in a PID namespace.  That requires support from nitro, though.
--=20
Sincerely,
Demi Marie Obenour (she/her/hers)
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