Date: Sat, 8 Aug 2020 19:05:45 +0200 From: Polytropon <freebsd@edvax.de> To: Ernie Luzar <luzar722@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Best way to make a machine boot with or without a Internet connection Message-ID: <20200808190545.20610591.freebsd@edvax.de> In-Reply-To: <5F2ED8CA.3070201@gmail.com> References: <CAGBxaXnaokaYSPQFK%2BWg6Ym3BxD=nin%2BMha21G8FbfcsCTuVYw@mail.gmail.com> <CA%2ByoEx_wrT-D6H7DxqWzHNciHZAaLmbPs%2Bny52f8JZrum_LgkQ@mail.gmail.com> <CAGBxaX=0-C29=pJnVbJOWefzWzquhbfLfMtfdfBSKjh569weFA@mail.gmail.com> <20200807211945.ba8fe409.freebsd@edvax.de> <20200808054023.555f71ae@scorpio.seibercom.net> <20200808182528.371dbadf.freebsd@edvax.de> <5F2ED8CA.3070201@gmail.com>
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On Sat, 08 Aug 2020 12:54:34 -0400, Ernie Luzar wrote: > Polytropon wrote: > > On Sat, 8 Aug 2020 05:40:23 -0400, Jerry wrote: > >> On Fri, 7 Aug 2020 21:19:45 +0200, Polytropon stated: > >>> On Fri, 7 Aug 2020 14:54:13 -0400, Aryeh Friedman wrote: > >>>> On Fri, Aug 7, 2020 at 1:24 PM Mario Lobo <lobo@bsd.com.br> wrote: > >>>> > >>>>> On Thu, Aug 6, 2020 at 6:20 PM Aryeh Friedman > >>>>> <aryeh.friedman@gmail.com> wrote: > >>>>> > >>>>>> Due to storm related damage my ISP went out for a few (12) hours > >>>>>> earlier > >>>>> in > >>>>>> the week and while I got it usable without a Internet connection > >>>>>> by > >>>>> putting > >>>>>> everything in my LAN in /etc/hosts (I also run a local_unbound > >>>>>> --> local bind9 on my file server which I have created a zone > >>>>>> file for the LAN machines also), but it was very slow in booting > >>>>>> due to ntpdate, tomcat > >>>>> and > >>>>>> sendmail not being to connect to the Internet for either forward > >>>>>> or > >>>>> reverse > >>>>>> DNS. I don't want to turn these services off, but I want to be > >>>>>> able to > >>>>> do > >>>>>> a normal boot (no long hangs) if the ISP goes down again. What > >>>>>> is the best way to do this? > >>>>>> > >>>>>> -- > >>>>>> Aryeh M. Friedman, Lead Developer, http://www.PetiteCloud.org > >>>>>> _______________________________________________ > >>>>>> freebsd-questions@freebsd.org mailing list > >>>>>> https://lists.freebsd.org/mailman/listinfo/freebsd-questions > >>>>>> To unsubscribe, send any mail to " > >>>>>> freebsd-questions-unsubscribe@freebsd.org" > >>>>>> > >>>>> This is a long shot but perhaps you could find a way to start these > >>>>> services in the background (&). > >>>>> > >>>> Given they are done by /etc/rc based on rc.onf not likely > >>> The "problem" is that rc, in combination with rc.conf and > >>> the responsible rc.d/ scripts, determines the order in which > >>> certain services have to be started. A workaround would be > >>> to use /etc/rc.local to manually do what rc would do with > >>> its internal logic. Using this approach, you could set the > >>> exact order as well as tests for "is currently connected > >>> to the Internet", starting all subsequent tasks that do > >>> require an online connection. You would put the first > >>> steps into the background, using &, and you could then > >>> even invoke "service netif start" (or parts thereof), > >>> followed by your own services (such as ntp, webserver, > >>> mailserver). Such a mechanism could be configured to > >>> set a flag, for example stupidly simple as a "lock file", > >>> and repeat to test for Internet availability until the > >>> Internet becomes available - then stop. Some further > >>> logic could be added to check if the connection stays > >>> alive, and if it goes down, stop the services, remove > >>> the lock file, and keep trying at a specified interval. > >>> > >>> Of course, this is all manual stuff, nothing is provided > >>> by the OS to handle this in an appropriate fashion and > >>> doesn't even look right... ;-) > >> I saw something on the web a while ago that sort of addressed this sort > >> of problem. The user ran a script via cron on boot-up that checked for > >> a specific conditions then started 'monit' to start the appropriate > >> applications. > > > > If I remember correctly, systemd is _the_ tool to deal with > > this kind of situation... ;-) > > > > Is systemd part of the base OS or a port? It's a GNU/Linux core component (adopted by most distributions) and often seen as the best advertisement to use FreeBSD. :-) -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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