 |
 |
Hi Tommaso, See below... On Fri, 28 Mar 2014, Tommaso Boccali wrote: > Let's say we prepare 2 regional redirectors, 1.1.1.1 and 2.2.2.2, and we > punt them in the DNS as xrootd.infn.it (no round robin: "host xrootd.infn.it" > will return 2 IP addresses). > Since we want to use xrootd.infn.it as fallback, we plan to have a nagios > test which checks 1.1.1.1 and 2.2.2.2 periodically, and in case one is NOT > ok, it is removed from the DNS. You shuld never remove anuthing from DNS, it will break all the recoverability aspects of xrootd. Even if it's broken it should remian in DNS. Hence, you don't need anything special. Just leave both servers in DNS all teh time. > So, question was: > let's say that site ABCD needs to restart the xrootd local servers, which > are configured as > > all.manager meta all *xrootd.infn.it <http://xrootd.infn.it>*+ 1213 Uhm, tyhe above won't work/ Perhaps you really wanted to say all.manager meta all xrootd.infn.it+ 1213 > what happens if AT THE RESTART MOMENT xrootd.infn.it only resolves to > 1.1.1.1 (since eventually 2.2.2.2 is broken)? And even more, what if 2 > hours later 2.2.2.2 enters again the DNS resolution for It won't re-resolve. That's why you always leave both addresses in DNS. Andy ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1