From owner-freebsd-virtualization@freebsd.org Mon Apr 29 08:24:10 2019 Return-Path: Delivered-To: freebsd-virtualization@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4D2311584D21 for ; Mon, 29 Apr 2019 08:24:10 +0000 (UTC) (envelope-from vas@mpeks.tomsk.su) Received: from admin.sibptus.ru (admin.sibptus.ru [IPv6:2001:19f0:5001:21dc::10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 709DB6B248 for ; Mon, 29 Apr 2019 08:24:09 +0000 (UTC) (envelope-from vas@mpeks.tomsk.su) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sibptus.ru; s=20181118; h=In-Reply-To:Message-ID:Subject:To:From:Date; bh=CRrzj0Dy177uRw+ZyoniL8Mo6aYPqv7N4BXRTrspCYk=; b=fHW3AfcV4SJxddOXGVPfY8RGUk fjMOLJV/vLFVZ/spwo27hiqeNOTXBJmRM40OVICKR/4fXfPJPt2KNoi0ktR+Nw+GqsV1iARdSfrJn jF8Fz0STLAGZz8ILmJlUEc4m7cVJx4Sp3qO1Q5Ad8b3g7sYTlEmTyVYF66oPctK9yR8w=; Received: from vas by admin.sibptus.ru with local (Exim 4.92 (FreeBSD)) (envelope-from ) id 1hL1a4-000Ly2-9R for freebsd-virtualization@freebsd.org; Mon, 29 Apr 2019 15:24:08 +0700 Date: Mon, 29 Apr 2019 15:24:08 +0700 From: Victor Sudakov To: freebsd-virtualization@freebsd.org Subject: Re: [vm-bhyve] shutting down VMs and kern.init_shutdown_timeout Message-ID: <20190429082408.GA84142@admin.sibptus.ru> References: <20190428044118.GA46284@admin.sibptus.ru> <1DE7A90B-E3AB-4F1E-9A3A-981B18751F8E@punkt.de> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="SUOF0GtieIMvvwua" Content-Disposition: inline In-Reply-To: <1DE7A90B-E3AB-4F1E-9A3A-981B18751F8E@punkt.de> X-PGP-Key: http://www.dreamwidth.org/pubkey?user=victor_sudakov X-PGP-Fingerprint: 10E3 1171 1273 E007 C2E9 3532 0DA4 F259 9B5E C634 User-Agent: Mutt/1.11.4 (2019-03-13) Sender: Victor Sudakov X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Apr 2019 08:24:10 -0000 --SUOF0GtieIMvvwua Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Patrick M. Hausen wrote: >=20 > > Am 28.04.2019 um 06:41 schrieb Victor Sudakov : > > "if the /etc/rc.shutdown does not terminate within 120 seconds, init wi= ll > > terminate it. The timeout can be configured via the sysctl variable > > kern.init_shutdown_timeout.=E2=80=9C > What=E2=80=99s keeping you from increasing that timeout for your > particular requirements?=20 Is that really necessary? Am I correct assuming that any VM is supposed to shut down within 2 minutes or else the bhyve processes will be killed? Or is this kern.init_shutdown_timeout only about the rc.shutdown script itself and not its children? > IMHO 2 minutes are a reasonable > default for a system that does not run hypervisor VMs - > which is probably the vast majority. >=20 > Anyone with the knowledge to implement a virtualized > environment=20 The lack of information about this caveat in https://wiki.freebsd.org/bhyve, man vm-bhyve, https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/virtualization-h= ost-bhyve.html and other sources suggests that this particular knowledge may be limited. Other hypervisors (non-bhyve) probably wait for all VMs to stop. > can simply set that to a more suitable value, > can=E2=80=99t he/she? Yes if they know about it. There should be a warning somewhere in the documentation if we want to be serious about FreeBSD as a hypervisor. Or better still, a warning that rcshutdown_timeout (if set) and kern.init_shutdown_timeout can be too low when running vm-bhyve and such is desirable. --=20 Victor Sudakov, VAS4-RIPE, VAS47-RIPN 2:5005/49@fidonet http://vas.tomsk.ru/ --SUOF0GtieIMvvwua Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEcBAEBAgAGBQJcxrSoAAoJEA2k8lmbXsY0sKYH/AzVoUXQjHtobAe+SNn68pNT Fe0TdV6b4kr0kIVaGs8b5rT3EijiPx6HCsN/j9WWDGgpcgWSMcyZBSePKtHqtrpV ZZ5mrt8vnvfARJhvbENwU+0TMnCfIW4EJmSDx6j+G5MIBOhS8VMPIl2KZo1AxDWV CX4fLkgL1mVNoOk/UcFqDBMRUWpfafeFB9WWRyTNR9BSdZdi6jM4NQLUApCH42ia pjf98KNhWt+4DEI60QbvMn6mRqXkSHatEnH5QN0arMSSeXMTzbgz2c/kESXzkxKf ykTkcF4BHFbILeAhkbuYtfV8BLIGeX4spokh88jMXKQxGnZjRwTCHGboYzbKKw8= =nxTs -----END PGP SIGNATURE----- --SUOF0GtieIMvvwua--