For SmartChat we were deploying on EC2. There were three types of serveers to deploy and I used EC2 tags and capistrano to deploy to each server correctly without having to hardcode any of the servers.
Here is my EC2 console with a custom Type key.
In the deploy script for production we can now use the AWS SDK to pull your instances down and deploy to them correctly.
Dotenv is used because AWS keys are stored in .env and capistrano won’t load that normally.
config/deploy/production.md
require 'aws-sdk'
require 'dotenv'
Dotenv.load
set :rails_env, "production"
primary = true
ec2 = AWS::EC2.new
ec2.instances.tagged("Type").tagged_values("web").each do |instance|
next unless instance.status == :running
# We only want one application server migrating the database
server instance.public_dns_name, :web, :app, :db, :primary => primary
primary = false
end
ec2.instances.tagged("Type").tagged_values("worker").each do |instance|
next unless instance.status == :running
server instance.public_dns_name, :worker, :app
end
ec2.instances.tagged("Type").tagged_values("scheduler").each do |instance|
next unless instance.status == :running
server instance.public_dns_name, :scheduler, :app
end
