[Vserver] Promote Secondaries

From: Herbert Poetzl <herbert_at_13thfloor.at>
Date: Sun 25 Dec 2005 - 16:23:02 GMT
Message-ID: <20051225162302.GB5803@MAIL.13thfloor.at>

Merry Xmas!
(Christmas, Chanukah, Hanukkah, Kwanzaa, Las Posadas, Ramadan ...)

I just investigated a long outstanding issue
regarding primary and secondary interfaces, where
taking down the primary interface will also bring
down all the secondaries (which might have bitten
one or the other here ...)

and recent kernels (means 2.6.14 and later) support
an actual workaround for this 'feature', which can
be easily activated via sysctl

 sysctl -w net.ipv4.conf.all.promote_secondaries=1

this will activate the so called secondary promotion
which means that the kernel will 'elect' a secondary
to become the new primary if the old one is taken
down ...

I would suggest to activate this in linux-vserver
setups and maybe userspace tools could pick that
up in a slightly more advanced way (i.e. per actual
interface and only if required or so)

best,
Herbert

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Received on Sun Dec 25 16:23:26 2005

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