A simple library to control Amazon Elastic Load Balancers for use within Capistrano
gem install capistrano-elb
You should have ec2credentials.yaml in the same directory as your cap files
#ec2credentials.yaml
---
:aws_access_key_id: YOUR_KEY_ID_
:aws_secret_access_key: YOUR_KEY
then just
require "capistrano-elb/tasks"
This will instantiate an instance of the CapELB class and add hooks to remove/readd before/after deploys
(Equivalent to having the following in your deploy.rb)
require "capistrano-elb"
namespace :elb do
capELB = CapELB.new()
task :remove do
servers = roles[:web].servers.map {|server| server.host}
puts "Removing #{servers} from ELB"
capELB.remove servers
end
task :add do
servers = roles[:web].servers.map {|server| server.host}
puts "Adding #{servers} to ELB"
capELB.add servers
end
task :save do
capELB.save_config
end
task :check do
puts capELB.check_config
end
end
before "deploy", "elb:remove"
after "deploy", "elb:add"
The first time you run it a record of the ELB setup is saved to config/lbs.yaml, you can check/update this with cap elb:check cap elb:save
You can just require capistrano-elb and do whatever you want inside your deploy scripts of course
If you want to hook after deploy but before the elb:add you can target after deploy:restart :your_task