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Roadworker

Note: This software is just transferred from https://github.com/codenize-tools (maintained by @winebarrel which was archived. Cookpad and @sorah asked @winebarrel for inheriting this project and took its ownership as a new maintainer.

Roadworker is a tool to manage Route53.

It defines the state of Route53 using DSL, and updates Route53 according to DSL.

Gem Version Build Status Coverage Status

Notice

Roadworker cannot update TTL of two or more same weighted A records (with different SetIdentifier) after creation.

Installation

Add this line to your application's Gemfile:

gem 'roadworker'

And then execute:

$ bundle

Or install it yourself as:

$ gem install roadworker

Usage

export AWS_ACCESS_KEY_ID='...'
export AWS_SECRET_ACCESS_KEY='...'
roadwork -e -o Routefile
vi Routefile
roadwork -a --dry-run
roadwork -a

Help

Usage: roadwork [options]
    -p, --profile PROFILE_NAME
        --credentials-path PATH
    -k, --access-key ACCESS_KEY
    -s, --secret-key SECRET_KEY
    -a, --apply
    -f, --file FILE
        --dry-run
        --force
        --health-check-gc
    -e, --export
    -o, --output FILE
        --split
        --with-soa-ns
    -t, --test
        --nameservers SERVERS
        --port PORT
        --target-zone REGEXP
        --exclude-zone REGEXP
        --no-color
        --debug

Routefile example

require 'other/routefile'

hosted_zone "winebarrel.jp." do
  rrset "winebarrel.jp.", "A" do
    ttl 300
    resource_records(
      "127.0.0.1",
      "127.0.0.2"
    )
  end

  rrset "winebarrel.jp.", "MX" do
    ttl 300
    resource_records(
      "10 mx.winebarrel.jp",
      "10 mx2.winebarrel.jp"
    )
  end
end

hosted_zone "info.winebarrel.jp." do
  rrset "xxx.info.winebarrel.jp.", "A" do
    dns_name "elb-dns-name.elb.amazonaws.com"
  end

  rrset "yyy.info.winebarrel.jp.", "A" do
    dns_name "elb-dns-name2.elb.amazonaws.com", :evaluate_target_health => true
  end

  rrset "zzz.info.winebarrel.jp", "A" do
    set_identifier "Primary"
    failover "PRIMARY"
    health_check "http://example.com:80/path", :search_string => "ANY_RESPONSE_STRING", :request_interval => 30, :failure_threshold => 3
    # If you want to specify the IP address:
    #health_check "http://192.0.43.10:80/path", :host => "example.com",...
    ttl 456
    resource_records(
      "127.0.0.1",
      "127.0.0.2"
    )
  end

  rrset "zzz.info.winebarrel.jp", "A" do
    set_identifier "Secondary"
    failover "SECONDARY"
    health_check "tcp://192.0.43.10:3306", :request_interval => 30, :failure_threshold => 3
    ttl 456
    resource_records(
      "127.0.0.3",
      "127.0.0.4"
    )
  end
end

# Private HostedZone
hosted_zone "winebarrel.local." do
  vpc "us-east-1", "vpc-xxxxxxxx"
  vpc "us-east-2", "vpc-xxxxxxxx"

  rrset "winebarrel.local.", "A" do
    ttl 300
    resource_records(
      "10.0.0.1",
      "10.0.0.2"
    )
  end
end

Calculated Health Checks

rrset "zzz.info.winebarrel.jp", "A" do
  set_identifier "Secondary"
  failover "SECONDARY"
  health_check :calculated => ["07c03a45-5b69-4044-9ec3-016cd8e5f74b", "bba4d1ea-27c2-4d0c-a249-c857a3e46d88"], :health_threshold => 1, :inverted => false
  ttl 456
  resource_records(
    "127.0.0.3",
    "127.0.0.4"
  )
end

Cloudwatch Metric Health Checks

rrset "zzz.info.winebarrel.jp", "A" do
  set_identifier "Secondary"
  failover "SECONDARY"
  health_check :cloudwatch_metric => {:region=>"ap-northeast-1", :name=>"MyCheck"}, :inverted => false, :insufficient_data_health_status => "LastKnownStatus"
  ttl 456
  resource_records(
    "127.0.0.3",
    "127.0.0.4"
  )
end

Dynamic private DNS example

require 'aws-sdk'

hosted_zone "us-east-1.my.local." do
  vpc "us-east-1", "vpc-xxxxxxxx"

  resp = Aws::EC2::Client.new(region: "us-east-1").describe_instances(filters:[{ name: 'vpc-id', values: ["vpc-xxxxxxxx"] }])
  instances = resp.reservations.each_with_object({}) do |reservation, reservations|
    reservations.merge!(reservation.instances.each_with_object({}) do |instance, instances|
      tag_name = instance.tags.find {|tag| tag['key'] == 'Name' }
      instances[instance.private_ip_address] = tag_name['value'] if tag_name and tag_name['value'] != ''
    end)
  end

  instances.each {|private_ip_address, tag_name|
    rrset "#{tag_name}.us-east-1.my.local.", "A" do
      ttl 300
      resource_records private_ip_address
    end
  }
end

Use template

template "default_rrset" do
  rrset context.name + "." + context.hosted_zone_name, "A" do
    ttl context.ttl
    resource_records(
      "127.0.0.1"
    )
  end
end

hosted_zone "winebarrel.jp." do
  context.ttl = 100
  include_template "default_rrset", :name => "www"
  include_template "default_rrset", :name => "www2"
end

Exclude specific records from management under Roadworker

Use this if your zone contains rrsets managed by other tools, and you want to ignore them in Roadworker.

hosted_zone "winebarrel.jp." do
  ignore "ignore.winebarrel.jp"
  ignore /^regexp-ignore/

  # *.ignore2.winebarrel.jp and ignore2.winebarrel.jp
  ignore_under "ignore2.winebarrel.jp"
end

Test

Routefile compares the results of a query to the DNS and DSL in the test mode.

shell> roadwork -t
..F..
info.winebarrel.jp. A:
  expected=127.0.0.1(300),127.0.0.3(300)
  actual=127.0.0.1(300),127.0.0.2(300)
5 examples, 1 failure

(Please note test of A(Alias) is not possible to perfection...)

Demo

Roadworker Demo

DNS management using GitHub/Bitbucket

DNS management using Git

Link

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