Hi Tommaso,
See below...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.
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.
> So, question was:
Uhm, tyhe above won't work/ Perhaps you really wanted to saylet's say that site ABCD needs to restart the xrootd local servers, whichall.manager meta all *xrootd.infn.it <http://xrootd.infn.it>*+ 1213
are configured as
It won't re-resolve. That's why you always leave both addresses in DNS.
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
Andy
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