TCP failover in software
I am setting up some machines with libnss-ldap to replace /etc/passwd with
LDAP access for centralised account administration.
I am concerned at what will happen if the LDAP server goes down or
experiences a network failure. I have a secondary LDAP configured but I need
a way to use it if the primary fails.
It seems that libnss-ldap does not support this (I have reported a wishlist
bug already).
Is there any software in Debian which can do this for me? I imagine that it
wouldn't be THAT difficult to write a program to listen on a port and then
when a connection comes in it could make a connection to one of two other
addresses based on which machine is running reliably.
If there is no such software then I'll have to write a program myself.
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