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We have LVS-loadbalanced ldap://VIP/ with IP tunneling.
When a program on a realserver connects to ldap://VIP/, it gets
connected to the loopback interface, because interface tunl0 has the
VIP address. This breaks when the realserver's LDAP daemon is down.
(This is not a problem with DNS or /etc/hosts, and it happens
both when I connect to the IP address and the DNS name.)
Anyway, can I prevent this so connections to VIP really go to VIP,
and only connections to $(hostname) and localhost go to loopback?
The realservers are currently Red Hat Linux release 6 or 7.
iptables LOG shows source = destination = VIP, interface = lo.
We do have the necessary users/groups in /etc/passwd & co so the
basics will work without LDAP. But it'd still be convenient to
have LDAP working for a realserver during maintenance.
--
Hallvard
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