Date: Sun, 20 Jan 2013 15:07:40 +0100 From: Willem Jan Withagen <wjw@digiware.nl> To: Ian Lepore <ian@FreeBSD.org> Cc: freebsd-hackers@FreeBSD.org, Sami Halabi <sodynet1@gmail.com>, "freebsd-stable@freebsd.org" <freebsd-stable@FreeBSD.org> Subject: Re: Failsafe on kernel panic Message-ID: <50FBFA2C.2010504@digiware.nl> In-Reply-To: <1358392725.32417.179.camel@revolution.hippie.lan> References: <CAEW%2BogYvJih5nEpFWPDjfRWxeURQYp=KM=WckmKB_VB=CxEUbQ@mail.gmail.com> <201301161513.27016.jhb@freebsd.org> <CAEW%2BogbQ3WD3ekVZ0GCgsd3UbL1YHzra-=jKEo6-1t11OMYkFg@mail.gmail.com> <1358392725.32417.179.camel@revolution.hippie.lan>
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On 17-1-2013 4:18, Ian Lepore wrote: > On Wed, 2013-01-16 at 23:27 +0200, Sami Halabi wrote: >> Thank you for your response, very helpful. >> one question - how do i configure auto-reboot once kernel panic occurs? >> >> Sami >> > > From src/sys/conf/NOTES, this may be what you're looking for... > > # > # Don't enter the debugger for a panic. Intended for unattended operation > # where you may want to enter the debugger from the console, but still want > # the machine to recover from a panic. > # > options KDB_UNATTENDED > > But I think it only has meaning if you have option KDB in effect, > otherwise it should just reboot itself after a 15 second pause. Well it is not the magical fix-all solution. Last night I had to drive to the colo (lucky for me a 5 min drive.) because I could not get a system to reboot/recover from a crash. Upon arrival the system was crashed and halted on the message: rebooting in 15 sec. Which but those 15 secs are would have gone by for about 10-20 minutes. fysically rebooting or resetting ended up in the same position: rebooting in 15 sec. Without ever getting to actually rebooting. So if I (you) have servers 2 hours away, I usually try to work on upgrading/rebooting during business hours. And remote hands can get me out of trouble.... IPMI is another nice way of getting at the server in these cases. But that requires a lot more infra and tinkering. --WjW
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