Date: Fri, 7 Aug 2020 21:19:45 +0200 From: Polytropon <freebsd@edvax.de> To: Aryeh Friedman <aryeh.friedman@gmail.com> Cc: Mario Lobo <lobo@bsd.com.br>, FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: Best way to make a machine boot with or without a Internet connection Message-ID: <20200807211945.ba8fe409.freebsd@edvax.de> In-Reply-To: <CAGBxaX=0-C29=pJnVbJOWefzWzquhbfLfMtfdfBSKjh569weFA@mail.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>
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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... ;-) -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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