Class: EasyEb::Dns

Inherits:
Object
  • Object
show all
Defined in:
lib/easy_eb/dns.rb

Class Method Summary collapse

Class Method Details

.create!(environment:, domain:, region: nil) ⇒ Object 



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# File 'lib/easy_eb/dns.rb', line 14

def self.create!(environment:, domain:, region: nil)
  root_domain = /(?<root>\w+\.\w+)\.?$/.match(domain)&.then { |results| results[:root] }
  raise "Must supply valid domain name." unless root_domain

  region_flag = region && " --region #{region}"

  puts hosted_zones = JSON.parse(`aws route53 list-hosted-zones`)
  hosted_zone = hosted_zones.fetch("HostedZones").find { |zone| zone.fetch("Name").start_with?(root_domain) }
  hosted_zone_id = hosted_zone["Id"]

  puts environments = JSON.parse(`aws#{region_flag} elasticbeanstalk describe-environments --environment-names #{environment}`)
  environment_cname = environments.dig("Environments", 0, "CNAME")
  environment_region = /(?<region>[1-9a-z-]+).elasticbeanstalk.com$/.match(environment_cname)[:region]

  change_batch = {
    Comment: "Point #{domain} to Elastic Beanstalk Environment #{environment}",
    Changes: [
      {
        Action: :UPSERT,
        ResourceRecordSet: {
          Name: domain,
          Type: :A,
          AliasTarget: {
            HostedZoneId: HOSTED_ZONES_BY_REGION[environment_region],
            DNSName: environment_cname,
            EvaluateTargetHealth: false
          }
        }
      }
    ]
  }

  system(
    "aws route53 change-resource-record-sets --hosted-zone-id #{hosted_zone_id} --change-batch '#{change_batch.to_json}'".tap do |command|
      puts "Running… \"#{command}\""
    end
  )
end