Perlbal::Manual::FailOver(3pm) User Contributed Perl Documentation Perlbal::Manual::FailOver(3pm)NAME
Perlbal::Manual::FailOver - Fail Over mechanism in Perlbal
VERSION
Perlbal 1.78.
DESCRIPTION
How Perlbal's Fail Over mechanism works.
Fail Over
Whenever Perlbal fails to open a connection to a machine, it assumes that machine is not available and spreads the load between the
remaining servers. It keeps trying to open connections to that server according to "error_retry_schedule".
If there are no available servers, Perlbal will keep trying to open connections to the servers until "idle_timeout" is reached, upon which
it will close the connection to the user. Clients interpret that closing differently: most will assume a 500 HTTP code, a few assume a 200
OK with empty content.
For more information on parameters "idle_timeout" and "error_retry_schedule" see Perlbal::Manual::ReverseProxy.
SEE ALSO
Perlbal::Manual::LoadBalancer, Perlbal::Manual::ReverseProxy.
perl v5.14.2 2011-01-23 Perlbal::Manual::FailOver(3pm)
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Perlbal::Plugin::XFFExtras(3pm) User Contributed Perl Documentation Perlbal::Plugin::XFFExtras(3pm)NAME
Perlbal::Plugin::XFFExtras - Perlbal plugin that can optionally add an X-Forwarded-Port and/or X-Forwarded-Proto header to reverse proxied
requests.
SYNOPSIS
# in perlbal.conf
LOAD XFFExtra
CREATE POOL web
POOL web ADD 10.0.0.1:80
CREATE SERVICE proxy
SET role = reverse_proxy
SET listen = 0.0.0.0:80
SET pool = web
SET plugins = XFFExtras
SET send_backend_port = yes
SET send_backend_proto = yes
ENABLE proxy
DESCRIPTION
This plugin adds optional headers to be sent to backend servers in reverse proxy mode.
HEADERS
o X-Forwarded-Port
This header will contain an integer value indicating the port that the peer connected to. This will correspond to the port number
specified on the listen line of the perlbal service that initially handled the connection.
o X-Forwarded-Proto
This header will contain a string indicating the protocol the client connected to perlbal via. Currently this will be either 'http' or
'https'.
AUTHOR
Jonathan Steinert, <hachi@kuiki.net>
COPYRIGHT AND LICENSE
Copyright (C) 2012 by Say Media Inc, <cpan@saymedia.com>
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.6 or,
at your option, any later version of Perl 5 you may have available.
perl v5.14.2 2012-02-06 Perlbal::Plugin::XFFExtras(3pm)
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