nanog mailing list archives
Re: [NANOG] Did Youtube not pay their domain bill?
From: Deepak Jain <deepak () ai net>
Date: Mon, 05 May 2008 00:32:35 -0400
note that joe's example brings up the interface before starting the name server program, and bringing it down if the name server program exits. this presumes that the name server will start very quickly, and that while running, it is healthy. since i've seen name server programs be unhealthy while running, and/or take a long time to start, i'm now considering an outboard shell script that runs some kind of DNS query and decides, based on the result, whether to bring the dedicated loopback interface up or down.
All deference to this model, we've all seen these kinds of problems with name servers. We *can* be certain that bringing a loopback interface up or down takes almost no time (with the implied effect to a speaker like Quagga). There is *no* reason with a sufficiently deep name server depth (depends on your load) that your monitoring script should *need* to hurry to test this condition. Every 5-10 or even 15 minutes to see if its eligible to bring up, more frequently to see if its eligible to take down. This also reduces oscillation. This means, bring up/kill off your name server in one cronjob (automatically taking the interface down at the end or after a kill), and monitor/talk to the interface in another (up function and sometimes the down). You'll be much happier. Deepak Jain AiNET _______________________________________________ NANOG mailing list NANOG () nanog org http://mailman.nanog.org/mailman/listinfo/nanog
Current thread:
- Re: [NANOG] Did Youtube not pay their domain bill?, (continued)
- Re: [NANOG] Did Youtube not pay their domain bill? Brant I. Stevens (May 03)
- Re: [NANOG] Did Youtube not pay their domain bill? Brant I. Stevens (May 03)
- Re: [NANOG] Did Youtube not pay their domain bill? Eric Spaeth (May 03)
- Re: [NANOG] Did Youtube not pay their domain bill? David Coulson (May 03)
- Re: [NANOG] Did Youtube not pay their domain bill? Marshall Eubanks (May 03)
- Re: [NANOG] Did Youtube not pay their domain bill? sthaug (May 03)
- Re: [NANOG] Did Youtube not pay their domain bill? Mike Lewinski (May 03)
- Re: [NANOG] Did Youtube not pay their domain bill? Kevin Blackham (May 03)
- Re: [NANOG] Did Youtube not pay their domain bill? Steve Gibbard (May 03)
- Re: [NANOG] Did Youtube not pay their domain bill? Paul Vixie (May 04)
- Re: [NANOG] Did Youtube not pay their domain bill? Deepak Jain (May 04)
- Re: [NANOG] Did Youtube not pay their domain bill? Steve Gibbard (May 05)
- [NANOG] OSPF minutia, and, technote publication venues Paul Vixie (May 05)
- Re: [NANOG] OSPF minutia, and, technote publication venues Mr. James W. Laferriere (May 05)
- Re: [NANOG] OSPF minutia, and, technote publication venues David Andersen (May 05)
- Re: [NANOG] OSPF minutia, and, technote publication venues Marshall Eubanks (May 05)
- Re: [NANOG] OSPF minutia, and, technote publication venues Chris Grundemann (May 05)
- Re: [NANOG] OSPF minutia, and, technote publication venues Steven M. Bellovin (May 05)
- Re: [NANOG] OSPF minutia, and, technote publication venues Roland Dobbins (May 05)
- Re: [NANOG] OSPF minutia, and, technote publication venues Steven M. Bellovin (May 05)
- Re: [NANOG] OSPF minutia, and, technote publication venues Paul Vixie (May 05)