Adding Load Sharing to Routing Script: Difference between revisions
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Three things must be added. At the start of the script:<br> | Three things must be added. At the start of the script:<br> | ||
1. <pre>require 'priority_and_weight_load_balancer' unless defined?(PriorityAndWeightLoadBalancer)</pre> | 1. | ||
<pre>require 'priority_and_weight_load_balancer' unless defined?(PriorityAndWeightLoadBalancer)</pre> | |||
2.In the main class:<br> | 2. | ||
In the main class:<br> | |||
<pre>include PriorityAndWeightLoadBalancer | <pre>include PriorityAndWeightLoadBalancer | ||
</pre> | </pre> | ||
3.<pre> | 3. | ||
<pre> | |||
after_filter :method => :filter_by_priority_and_weight, | after_filter :method => :filter_by_priority_and_weight, | ||
:weight_by => :call_attempts, | :weight_by => :call_attempts, |
Latest revision as of 10:37, 13 June 2022
This article show you how to integrate a routing script filter that sorts matching routes by priority and weight (weight is used for load-sharing when multiple routes have the same priority).
Once ordered, the routes will be used, one after the other until a route is working (according to Route Retry parameters).
NOTE: starting from version 3.0.80 this script is installed by default (only for new installations, or a fresh routing script)
Setting up Filter Scripts
To setup a Filter, the main script needs to be modified. The main script can be either simple_routing.rb, or any other script.
First, go to the routing script section of the Web portal
Gateway -> Routing scripts -> Example Scripts -> simple_routing.rb [Edit]
Three things must be added. At the start of the script:
1.
require 'priority_and_weight_load_balancer' unless defined?(PriorityAndWeightLoadBalancer)
2.
In the main class:
include PriorityAndWeightLoadBalancer
3.
after_filter :method => :filter_by_priority_and_weight, :weight_by => :call_attempts, :default_load_share_mode => :alternate_backup, :max_priority_delta => -1
The final script will look like this (with possibly other filters also included):
require 'base_routing' require 'priority_and_weight_load_balancer' unless defined?(PriorityAndWeightLoadBalancer) class SimpleRouting < BaseRouting include PriorityAndWeightLoadBalancer route_match :call_field_name => :called route_match :call_field_name => :calling route_match :call_field_name => :nap route_match :method => :match_nap_availability route_remap :call_field_name => :called, :route_field_name => :remapped_called route_remap :call_field_name => :calling, :route_field_name => :remapped_calling route_remap :call_field_name => :nap, :route_field_name => :remapped_nap after_filter :method => :filter_by_priority_and_weight, :weight_by => :call_attempts, :default_load_share_mode => :alternate_backup, :max_priority_delta => -1 end
Adding New Custom Variables
You need to add two custom columns to use this script. There is a default value and it can be changed in each route afterwards.
Gateway -> Routes -> Create New Route Column
Name: priority
Type attributes: integer
Default: 10
Gateway -> Routes -> Create New Route Column
Name: weight
Type attributes: integer
Default: 100