Date: Thu, 23 Nov 2017 06:56:50 -0800 (PST) From: "Rodney W. Grimes" <freebsd@pdx.rh.CN85.dnsmgr.net> To: Emmanuel Vadot <manu@bidouilliste.com> Cc: Devin Teske <devin@shxd.cx>, Ian Lepore <ian@freebsd.org>, Emmanuel Vadot <manu@freebsd.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r326095 - head/usr.sbin/bsdinstall/scripts Message-ID: <201711231456.vANEuodh091276@pdx.rh.CN85.dnsmgr.net> In-Reply-To: <20171123105324.8726e4e5c0471f87ea9c4089@bidouilliste.com>
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> > Hi Devin, > > On Thu, 23 Nov 2017 01:33:39 -0800 > Devin Teske <devin@shxd.cx> wrote: > > > > > > > > On Nov 22, 2017, at 11:15 PM, Emmanuel Vadot <manu@bidouilliste.com> wrote: > > > > > >> On 2017-11-22 17:38, Ian Lepore wrote: > > >>> On Wed, 2017-11-22 at 15:27 +0000, Emmanuel Vadot wrote: > > >>> Author: manu > > >>> Date: Wed Nov 22 15:27:47 2017 > > >>> New Revision: 326095 > > >>> URL: https://svnweb.freebsd.org/changeset/base/326095 > > >>> Log: > > >>> bsdinstall: Add ntpdate option > > >>> > > >>> When you install a computer for the first time, the date in the CMOS sometimes > > >>> not accurate and you need to ntpdate as ntpd will fail a the time difference > > >>> is too big. > > >>> Add an option in bsdinstall to enable ntpdate that will do that for us. > > >>> > > >>> Reviewed by: allanjude > > >>> Differential Revision: https://reviews.freebsd.org/D13149 > > >>> Modified: > > >>> head/usr.sbin/bsdinstall/scripts/services > > >>> Modified: head/usr.sbin/bsdinstall/scripts/services > > >>> ============================================================================== > > >>> --- head/usr.sbin/bsdinstall/scripts/services Wed Nov 22 15:18:11 2017 (r326094) > > >>> +++ head/usr.sbin/bsdinstall/scripts/services Wed Nov 22 15:27:47 2017 (r326095) > > >>> @@ -46,6 +46,8 @@ DAEMONS=$( dialog --backtitle "FreeBSD Installer" \ > > >>> local_unbound "Local caching validating resolver" ${local_unbound:-off} \ > > >>> sshd "Secure shell daemon" ${sshd_enable:-off} \ > > >>> moused "PS/2 mouse pointer on console" ${moused_enable:-off} \ > > >>> + ntpdate "Synchronize system and network time at bootime" \ > > >>> + ${ntpdate_enable:-off} \ > > >>> ntpd "Synchronize system and network time" ${ntpd_enable:-off} \ > > >>> powerd "Adjust CPU frequency dynamically if supported" \ > > >>> ${powerd_enable:-off} \ > > >> The right way to enable a time-step at boot is to set the rc conf > > >> variable ntpd_sync_on_start to YES. ntpdate has been deprecated for > > >> *years*. > > >> -- Ian > > > > > > Hi Ian, > > > > > > Thanks I didn't know about option -g (nor ntpd_sync_on_start), this bring a few questions : > > > > > > - Is there any reason to not always use -g for ntpd ? As a lambda user I just want my time to be set, no matter what. > > > - Should we remove ntpdate in -current before 12 if it's deprecated ? > > > > > > I'll make the necessary changes according to your (or others) answers. > > > > > > > I would not remove ntpdate. I concur, as ntpdate is trivial to use, ntpd -pg requires a proper /etc/ntp.conf, though that is trival too you well not get what you want if you do not have that. > > Is there a way to make ntpd sync and then quit immediately? > > Just by reading the man I see the -q option which does exactly that. > Setting both -q and -g should have the same behavior than ntpdate (not > tested). ntpd -pg is the preferred method per the ntp.org documentation: https://support.ntp.org/bin/view/Dev/DeprecatingNtpdate > > > If not, sounds like ntpdate serves a purpose not filled by ntpd. > > > > Valid case is someone running a VM that gets paused for days, weeks, or even months at a time. On such a VM it may make more sense to let the clock be only sporadically managed in an adhoc manner. > > > > I personally like to use ntpdate on said VMs because I generally set a timeout on my ssh-agent in said VMs and by managing the clock manually allows me to better control keys loaded. > > > > Pretty sure other people may have other reasons for non-daemonized clock management. > > That's why I asked :) I think that the ntp distribution still contains ntpdate, so long as that is true we should continue to include it in FreeBSD. When/if they remove it from the official ntp distribution then this issue shall need a revist. > > -- > > Devin > > -- > Emmanuel Vadot <manu@bidouilliste.com> <manu@freebsd.org> -- Rod Grimes rgrimes@freebsd.org
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