Date: Mon, 02 Dec 2013 11:28:37 -0800 From: Colin Percival <cperciva@freebsd.org> To: Devin Teske <dteske@freebsd.org> Cc: FreeBSD RC <freebsd-rc@FreeBSD.org> Subject: Re: RFC: support for re-sourcing /etc/rc.conf Message-ID: <529CDF65.7000406@freebsd.org> In-Reply-To: <9EF48D5E-2706-4628-BF7B-DBBD5D7E227F@fisglobal.com> References: <529BEDDB.8010003@freebsd.org> <20131202.214853.1540734630471865242.hrs@allbsd.org> <529CD535.5010903@freebsd.org> <9EF48D5E-2706-4628-BF7B-DBBD5D7E227F@fisglobal.com>
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On 12/02/13 11:17, Teske, Devin wrote: > On Dec 2, 2013, at 10:45 AM, Colin Percival wrote: >> No, the other way around -- a different script (part of ec2-scripts) updates >> /etc/rc.conf based on metadata provided at VM launch time. One use of this >> would be to set firstboot_pkgs_* variables to control the behaviour of the >> firstboot-pkgs port moments later in the boot process. > > sysrc(8) in 9.2+ base comes to mind. > NB: Available as a port for older releases 4.8+ (sysutils/sysrc) I should have been clearer, the VM launch user-data could specify any files to modify; it just happens that rc.conf is a problem because it's over-aggressively cached. >> 3. Early in the boot process, ec2-scripts reads that user-data, updates >> /etc/rc.conf, and signals /etc/rc. >> 4. /etc/rc re-sources /etc/rc.conf. > > Cool. How's the signaling in #3 done to get #4? My (one line plus comments) patch teaches rc to re-source rc.conf if it receives a SIGALRM. > I like the idea of firstboot_pkgs_* Great. It's in the ports tree, sysutils/firstboot-pkgs. > I also like Hiroki's idea of stashing it all into rc.conf.d As I mentioned in reply to him, forcing people to use rc.conf.d instead of rc.conf seems like a usability challenge. -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
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