List AWS AZs and Regions

README.md

Required Gems

• aws-sdk
• terminal-table

Install: gem install aws-sdk terminal-table

Usage

Run ruby awsazs-update.rb to generate the JSON file.

Run ruby awsazs.rb to see the output:

+----------------+-------------+------------------------------------------------------------------------+
| Code           | Region Name | AZs                                                                    |
+----------------+-------------+------------------------------------------------------------------------+
| ap-northeast-1 | Tokyo       | ap-northeast-1a, ap-northeast-1c                                       |
| ap-northeast-2 | Seoul       | ap-northeast-2a, ap-northeast-2c                                       |
| ap-south-1     | Mumbai      | ap-south-1a, ap-south-1b                                               |
| ap-southeast-1 | Singapore   | ap-southeast-1a, ap-southeast-1b                                       |
| ap-southeast-2 | Sydney      | ap-southeast-2a, ap-southeast-2b, ap-southeast-2c                      |
+----------------+-------------+------------------------------------------------------------------------+
| ca-central-1   | Canada      | ca-central-1a, ca-central-1b                                           |
+----------------+-------------+------------------------------------------------------------------------+
| eu-central-1   | Frankfurt   | eu-central-1a, eu-central-1b, eu-central-1c                            |
| eu-west-1      | Ireland     | eu-west-1a, eu-west-1b, eu-west-1c                                     |
| eu-west-2      | London      | eu-west-2a, eu-west-2b                                                 |
+----------------+-------------+------------------------------------------------------------------------+
| sa-east-1      | Saopaulo    | sa-east-1a, sa-east-1b, sa-east-1c                                     |
+----------------+-------------+------------------------------------------------------------------------+
| us-east-1      | Virginia    | us-east-1a, us-east-1b, us-east-1c, us-east-1d, us-east-1e, us-east-1f |
| us-east-2      | Ohio        | us-east-2a, us-east-2b, us-east-2c                                     |
| us-west-1      | California  | us-west-1b, us-west-1c                                                 |
| us-west-2      | Oregon      | us-west-2a, us-west-2b, us-west-2c                                     |
+----------------+-------------+------------------------------------------------------------------------+

awsazs-data.json

{
  "ap-south-1": {
    "name": "mumbai",
    "azs": [
      "ap-south-1a",
      "ap-south-1b"
    ]
  },
  "eu-west-2": {
    "name": "london",
    "azs": [
      "eu-west-2a",
      "eu-west-2b"
    ]
  },
  "eu-west-1": {
    "name": "ireland",
    "azs": [
      "eu-west-1a",
      "eu-west-1b",
      "eu-west-1c"
    ]
  },
  "ap-northeast-2": {
    "name": "seoul",
    "azs": [
      "ap-northeast-2a",
      "ap-northeast-2c"
    ]
  },
  "ap-northeast-1": {
    "name": "tokyo",
    "azs": [
      "ap-northeast-1a",
      "ap-northeast-1c"
    ]
  },
  "sa-east-1": {
    "name": "saopaulo",
    "azs": [
      "sa-east-1a",
      "sa-east-1b",
      "sa-east-1c"
    ]
  },
  "ca-central-1": {
    "name": "canada",
    "azs": [
      "ca-central-1a",
      "ca-central-1b"
    ]
  },
  "ap-southeast-1": {
    "name": "singapore",
    "azs": [
      "ap-southeast-1a",
      "ap-southeast-1b"
    ]
  },
  "ap-southeast-2": {
    "name": "sydney",
    "azs": [
      "ap-southeast-2a",
      "ap-southeast-2b",
      "ap-southeast-2c"
    ]
  },
  "eu-central-1": {
    "name": "frankfurt",
    "azs": [
      "eu-central-1a",
      "eu-central-1b",
      "eu-central-1c"
    ]
  },
  "us-east-1": {
    "name": "virginia",
    "azs": [
      "us-east-1a",
      "us-east-1b",
      "us-east-1c",
      "us-east-1d",
      "us-east-1e",
      "us-east-1f"
    ]
  },
  "us-east-2": {
    "name": "ohio",
    "azs": [
      "us-east-2a",
      "us-east-2b",
      "us-east-2c"
    ]
  },
  "us-west-1": {
    "name": "california",
    "azs": [
      "us-west-1b",
      "us-west-1c"
    ]
  },
  "us-west-2": {
    "name": "oregon",
    "azs": [
      "us-west-2a",
      "us-west-2b",
      "us-west-2c"
    ]
  }
}

awsazs-update.rb

require 'aws-sdk'
require 'json'

def region_name(r)
  regions = {
    'us-east-1'       => 'virginia',
    'us-east-2'       => 'ohio',
    'us-west-1'       => 'california',
    'us-west-2'       => 'oregon',
    'ca-central-1'    => 'canada',
    'eu-west-1'       => 'ireland',
    'eu-central-1'    => 'frankfurt',
    'eu-west-2'       => 'london',
    'ap-northeast-1'  => 'tokyo',
    'ap-northeast-2'  => 'seoul',
    'ap-southeast-1'  => 'singapore',
    'ap-southeast-2'  => 'sydney',
    'ap-south-1'      => 'mumbai',
    'sa-east-1'       => 'saopaulo',
  }
  return regions[r]
end

output = Hash.new

ec2 = Aws::EC2::Client.new
ec2.describe_regions.regions.each do |r|
  reg = r.region_name
  output[reg] = { name: region_name(reg), azs: []}
  ec2_r = Aws::EC2::Client.new region: r.region_name
  ec2_r.describe_availability_zones.availability_zones.each { |az| output[r.region_name][:azs] << az.zone_name }
end

file = File.join(File.expand_path(File.dirname(__FILE__)), 'awsazs-data.json')
File.write(file, JSON.dump(output))

puts "Output: #{JSON.pretty_generate(output)}"
puts "Saved to file #{file}"

awsazs.rb

require 'json'
require 'terminal-table'

class String
  def bold;           "\e[1m#{self}\e[22m" end
end

file  = File.join(File.expand_path(File.dirname(__FILE__)), 'awsazs-data.json')
data  = JSON.load(File.read(file))

division  = ''
table     = Terminal::Table.new do |t|
  t.headings = ['Code'.bold, 'Region Name'.bold, 'AZs'.bold]
  data.sort.each do |k,v|
    t.add_separator unless division == k[0..1] or division == ''
    division = k[0..1]
    t.add_row [k.bold, v['name'].capitalize.bold, v['azs'].join(', ')]
  end
end

print table