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Operating Systems Linux SuSE Network Load Balancing Server in OpenSuse 11.1 Post 302384780 by talmoran on Wednesday 6th of January 2010 09:39:48 AM
Old 01-06-2010
Network Load Balancing Server

Hi,
For this solution:
install two identical servers with Linux OpenSUSE
In both servers this daemons will install: Heartbeat (HA Linux), HAproxy, HTTPD

1. The heartbeat daemon will manage the virtual IP (VIP) and the HAproxy daemon. The entire requested package goes through the VIP and only one HAproxy daemon will be up.

2. The HAproxy will work in active standby mode. The Heartbeat daemon will manage the failover of the HAproxy between the servers.

3. HAproxy transfer the http request to one of the web servers, the balancer algorithm can be use is:
• leastconn - The server with the lowest number of connections receives the connection. This algorithm is recommended where very long sessions are expected. leastconn is not very well suited for protocols using short sessions such as HTTP.
• Roundrobin - Each server is used in turns, according to their weights. This is the smoothest and fairest algorithm when the server's processing time remains equally distributed. This algorithm is dynamic, which means that server weights may be adjusted on the fly for slow starts for instance.

4. HAproxy check if the HTTPD daemon are up, in case one of the HTTPD daemon is down all the http request will forward the available web server.

Link:
HAProxy: http://haproxy.1wt.eu/
Heartbeat: http://www.linux-ha.org/Heartbeat

hope this help you,
Tal.
 

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Net::Server::MultiType(3)				User Contributed Perl Documentation				 Net::Server::MultiType(3)

NAME
Net::Server::MultiType - Net::Server personality SYNOPSIS
use Net::Server::MultiType; @ISA = qw(Net::Server::MultiType); sub process_request { #...code... } my @types = qw(PreFork Fork Single); Net::Server::MultiType->run(server_type=>@types); DESCRIPTION
Please read the pod on Net::Server first. This module is a personality, or extension, or sub class, of the Net::Server module. This personality is intended to allow for easy use of multiple Net::Server personalities. Given a list of server types, Net::Server::MultiType will require one at a time until it finds one that is installed on the system. It then adds that package to its @ISA, thus inheriting the methods of that personality. ARGUMENTS
In addition to the command line arguments of the Net::Server base class, Net::Server::MultiType contains one other configurable parameter. Key Value Default server_type 'server_type' 'Single' server_type May be called many times to build up an array or possible server_types. At execution, Net::Server::MultiType will find the first available one and then inherit the methods of that personality CONFIGURATION FILE
"Net::Server::MultiType" allows for the use of a configuration file to read in server parameters. The format of this conf file is simple key value pairs. Comments and white space are ignored. #-------------- file test.conf -------------- ### multi type info ### try PreFork first, then go to Single server_type PreFork server_type Single ### server information min_servers 20 max_servers 80 spare_servers 10 max_requests 1000 ### user and group to become user somebody group everybody ### logging ? log_file /var/log/server.log log_level 3 pid_file /tmp/server.pid ### access control allow .+.(net|com) allow domain.com deny a.+ ### background the process? background 1 ### ports to bind host 127.0.0.1 port localhost:20204 port 20205 ### reverse lookups ? # reverse_lookups on #-------------- file test.conf -------------- PROCESS FLOW
See Net::Server HOOKS
There are no additional hooks in Net::Server::MultiType. TO DO
See Net::Server AUTHOR
Paul T. Seamons paul@seamons.com SEE ALSO
Please see also Net::Server::Fork, Net::Server::INET, Net::Server::PreFork, Net::Server::MultiType, Net::Server::Single perl v5.12.1 2007-02-02 Net::Server::MultiType(3)
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