From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.sysutils.supervision.general/2906 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Jan Braun Newsgroups: gmane.comp.sysutils.supervision.general Subject: Re: runit SIGPWR support Date: Fri, 28 Feb 2020 07:39:47 +0100 Message-ID: <20200228063947.w6le5lzy7wbfs4xf@klumpi.ignorelist.com> References: <18110531581952419@sas8-7ec005b03c91.qloud-c.yandex.net> <7003111582476686@vla3-6a5326aeb4ee.qloud-c.yandex.net> <77a6d0d5-f292-b225-e9b9-77c290394b47@gmx.com> <20200224152617.GA28493@mail.hallyn.com> <5f5e0473-4ed1-58c0-26af-2eabf43232b0@gmx.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="hposxidlitihu26y" Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="84951"; mail-complaints-to="usenet@ciao.gmane.io" Cc: supervision@list.skarnet.org To: innerspacepilot Original-X-From: supervision-return-2495-gcsg-supervision=m.gmane-mx.org@list.skarnet.org Fri Feb 28 07:39:58 2020 Return-path: Envelope-to: gcsg-supervision@m.gmane-mx.org Original-Received: from alyss.skarnet.org ([95.142.172.232]) by ciao.gmane.io with smtp (Exim 4.92) (envelope-from ) id 1j7ZJV-000LyD-FY for gcsg-supervision@m.gmane-mx.org; Fri, 28 Feb 2020 07:39:57 +0100 Original-Received: (qmail 27595 invoked by uid 89); 28 Feb 2020 06:40:18 -0000 Mailing-List: contact supervision-help@list.skarnet.org; run by ezmlm Original-Sender: Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Original-Received: (qmail 27588 invoked from network); 28 Feb 2020 06:40:18 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1582871990; bh=OFJ4OBJpf4AJw6ylK8T5m455FzONQfrPd6hVTh0spZs=; h=X-UI-Sender-Class:Date:From:To:Cc:Subject:References:In-Reply-To; b=a/HEaZn4B3aPplhDkF9qh1US38hXlbKIvR7uPTV8KvSKuSayEvtaDJ3SNeSyMHTPM g1sIeCeXXmBmhpyNBt8MTxiIQP+toNupwbPIIPYeUe8okFY1Mu57Wy/F1tAsHduOIe /7QfaVG2auuzTq9aeLYlwYyZKg0UnOX8KonqzoHU= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Mail-Followup-To: innerspacepilot , supervision@list.skarnet.org X-GPG-Fingerprint: 1736 D50F 170B 70A6 9223 BC15 295E 703E 6D1D 2FCF X-GPG-Encryption-Welcome: always Content-Disposition: inline In-Reply-To: <5f5e0473-4ed1-58c0-26af-2eabf43232b0@gmx.com> X-Provags-ID: V03:K1:aq/SkX89qyBqYGIfD8F0kZjdVeJyCoWXRCbF+f8qx7MrzONwmvI BU7KpPYKIoNYYNPasDGYFm4h1M7VroNgIgwm87dM60LkVnfNiRIXpb+PxF1U2uQRdyv+i3g zTqdLZiqBApMHGvLijKupCrDtdLvK0saHNer3/nTUh+l4eZGfpDzSuTJhfNB1yWkD0xdA4/ LL5oIhgNeXkXTDkldU1zw== X-UI-Out-Filterresults: notjunk:1;V03:K0:vd/fBY766Gw=:dEcWatNErsJ/Yw6+xFsjGi n8OjBTnBmfyEkHltTxjxkfzCCQn9i/7bVU7urCLxicrWvfarw5A0O8+RYJ8JuCgN7IvoitZz8 tLp7a+Z8MgaQO7aXCfcI/y4PBF36UZUHN88ktl1GNVSatONDopSTb+5D/x1+bJNTtOEkSSyIs sgiJ1uHUQJC98H1hjguQ9Z3m6ihKkTviigZh3LG/R+lXko28eERAjXM9DoZgJfFO1io9fY2wi jmUqenQ1Oi1D8nG7Splv/KCuS5NX3z1r1mk0qyYVfHAnIf3vh/glTEWiZA4RWavjWp2j4QPJG 54rFRCKVOWc6cZTzP5GOUTQ9UJOGsXLGrKwGgabBe8D90rI9OJyH7so124lyUf4QXSa+O16+e Uq4RzFOzw2nt3wA+j4ZCvAGLBh1ldmeidtjunLSNRHSHIZ+2/2uDKrQnvv00lYfXX5AeSn+WR dxFk35gW8peOIQmIGRldpHQ7qHzOPrxx6p+Q0JKmLj22OsrkTvuUsK3iPGm/qsyoDZZzfJYSL phzCF5HwKLFHL1X16Gab8nyTwuBvf4pKi+4IPQH4rRKxNtzTmXpnTHNRmGIAJEYnsL6NjzY1d Q5zNc9R40qdTLqqzGVlbMvQYnzFTZiSE0K181jSSHrcypV4dmL2Iknl8dGGKEQiGNfqiE6X5t aCWmEWGC73NTCCLaPfwe19neZJaXlNs4MviU5m4qx1RRseJWhHSnqdloWaNVYREwXHXZaiqYP WChsHN46J5+xozQRElA01x3PI6KFgWw2wBxkoeJ1kV0QLwET+cbEUmtOzhNrko3CiNcjW92f Xref: news.gmane.io gmane.comp.sysutils.supervision.general:2906 Archived-At: --hposxidlitihu26y Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable innerspacepilot schrob: > I have checked openrc and busybox - both support SIGPWR. >=20 > So I see no reason to change lxd behaviour, unless some realworld > software uses SIGPWR. *sigh* We've been here before. The Linux kernel uses SIGPWR to tell init "there's a power failure imminent". There's a difference to "please shutdown the system", even if (current versions of) busybox and openrc choose to shutdown the system when told about an imminent power failure. Laurent (imho correctly) argues that e.g. suspend-to-disk would be a better reaction when faced with an imminent power failure, and therefore refuses to declare that his init will shutdown the system when getting SIGPWR. The people who think adjusting lxc.signal.halt is too much effort would like inits to standardize on a signal for initiating shutdown. That would indeed be nice. But the only (catchable) signal that's out of the question for that purpose is, indeed, SIGPWR. Because the most relevant realworld software, the Linux kernel itself, has already fixed SIGPWR for a different purpose. cheers, Jan --hposxidlitihu26y Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEFzbVDxcLcKaSI7wVKV5wPm0dL88FAl5YtawACgkQKV5wPm0d L8+Cxg/+LazhMfeQakSx9AYo+CuZaja5jU7LePmIX6uF2ZVX0/v4mGuO6li0TjDI Kn2zPf/Rjbi4+y+mgTU419V2Lf0rtSeePhD8RZH/hu8NAqGeb8sxO26VU9ubql3G 1ASaAZzOnLTl3C5PpF49YB/cSppdUFCUw8I0EjcCrZFbXwmPGNWq/G1VmldsGPPr DYXSL/irxru5MP8/l2xxeb//2JnaGSzUudAJCGEfyEUK8M+HYYrtAqbf7OKm2vYm KE9f/tXE5KEKXBqynkFCbfARBIE1n+/+b1uS1MVo7lI+ec6yWFDx+t8v0bNIUZNh R8L42c9JuOS0LK1FH+VOn+l5nKeSKe+s54oQ/xM0E0Myn406Jf0u/R0y0jWQ3XdQ cwAg5DBg1f/bFYzJfNB5KkTGydcCXuaS1yipArU39251fJysGXz0cp9SxiJYACes 7akKf0TuTCQfSrscIF51ZCJibiz0+Jr3hxW+y2kaQLjflUec2fD/AcQLFWwN3XlE qRCJ/Hvl1W25ZN5Ztk8WI09Gb4aM9ePNTy6hsGXq95LdG5N4q4mIx/o1Kz0rks/T IqaErBPMSKwtBIQ+DdvnOaA6xao7MxDyOq8qY1lqh0dqCjvnKLh5re7hq2/+EWge nq6qVGPGZufWFW/SSD6EI0I4wDVwnVgG6aGuY6HI4MFaBsgz1ws= =fn0/ -----END PGP SIGNATURE----- --hposxidlitihu26y--