Date: Sat, 8 Aug 2020 18:25:28 +0200 From: Polytropon <freebsd@edvax.de> To: freebsd-questions@freebsd.org Subject: Re: Best way to make a machine boot with or without a Internet connection Message-ID: <20200808182528.371dbadf.freebsd@edvax.de> In-Reply-To: <20200808054023.555f71ae@scorpio.seibercom.net> 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>
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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... ;-) -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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