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check.rb
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check.rb
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#!/usr/bin/env ruby
require 'rubygems'
require 'bundler/setup'
require 'aws-sdk'
require 'terminal-table'
require 'yaml'
config = YAML.load_file('config.yml')
def check_ec2(config, reservations, instances)
config['regions'].each do |region|
connection = Aws::EC2::Client.new(
credentials: Aws::Credentials.new(config['access_key_id'], config['secret_access_key']),
region: region)
connection.describe_reserved_instances(filters: [{:name => "state", :values => ['active']}]).reserved_instances.each do |ri|
type = 'ec2:' + ri.instance_type
type += ':vpc' if ri.product_description =~ /VPC/
type += ':' + (ri.availability_zone || 'none')
if ri.product_description =~ /VPC/
type = 'ec2:' + ri.instance_type + ':vpc'
else
type = 'ec2:' + ri.instance_type + ':' + (ri.availability_zone || 'none')
end
reservations[type] += ri.instance_count
end
connection.describe_instances(filters: [{:name => "instance-state-name", :values => ['running']}]).reservations.each do |r|
r.instances.each do |i|
if i.vpc_id.nil?
type = 'ec2:' + i.instance_type + ':' + i.placement.availability_zone
else
type = 'ec2:' + i.instance_type + ':vpc'
end
instances[type] += 1
end
end
end
end
def check_elasticache(config, reservations, instances)
config['regions'].each do |region|
connection = Aws::ElastiCache::Client.new(
credentials: Aws::Credentials.new(config['access_key_id'], config['secret_access_key']),
region: region)
connection.describe_reserved_cache_nodes.reserved_cache_nodes.each do |r|
next unless r[:state] == 'active'
type = 'elasticache:' + r[:product_description] + ':' + r[:cache_node_type]
type << ':' << region
reservations[type] += 1
end
connection.describe_cache_clusters.cache_clusters.each do |c|
next unless c[:cache_cluster_status] == 'available'
type = 'elasticache:' + c[:engine] + ':' + c[:cache_node_type]
type += ':' + region
instances[type] += c[:num_cache_nodes]
end
end
end
def check_rds(config, reservations, instances)
config['regions'].each do |region|
connection = Aws::RDS::Client.new(
credentials: Aws::Credentials.new(config['access_key_id'], config['secret_access_key']),
region: region)
connection.describe_reserved_db_instances().reserved_db_instances.each do |i|
next unless i[:state] == 'active'
type = 'rds:' + i[:product_description] + ':' + i[:db_instance_class]
type += '-multi_az' if i[:multi_az]
type += ':' + region
reservations[type.gsub('postgresql', 'postgres')] += i[:db_instance_count]
end
connection.describe_db_instances().db_instances.each do |i|
type = 'rds:' + i[:engine] + ':' + i[:db_instance_class]
type += '-multi_az' if i[:multi_az]
type += ':' + region
instances[type] += 1
end
end
end
def check_redshift(config, reservations, instances)
config['regions'].each do |region|
connection = Aws::Redshift::Client.new(
credentials: Aws::Credentials.new(config['access_key_id'], config['secret_access_key']),
region: region)
connection.describe_reserved_nodes.reserved_nodes.each do |i|
next unless i[:state] == 'active'
type = 'redshift:' + i[:node_type]
type += ':' + region
reservations[type] += i[:node_count]
end
connection.describe_clusters.clusters.
select { |i| i[:cluster_status] == 'available' }.each do |i|
type = 'redshift:' + i[:node_type]
type += ':' + region
instances[type] += i[:number_of_nodes]
end
end
end
reservations = Hash.new(0)
instances = Hash.new(0)
check_ec2(config, reservations, instances) if config['products'].include? 'ec2'
check_elasticache(config, reservations, instances) if config['products'].include? 'elasticache'
check_rds(config, reservations, instances) if config['products'].include? 'rds'
check_redshift(config, reservations, instances) if config['products'].include? 'redshift'
unused_reservations = reservations.clone
unreserved_instances = instances.clone
instances.each do |type, count|
unused_reservations[type] -= count
unused_reservations[type] = 0 if unused_reservations[type] < 0
end
reservations.each do |type, count|
unreserved_instances[type] -= count
unreserved_instances[type] = 0 if unreserved_instances[type] < 0
end
table = Terminal::Table.new(headings: ['Type', 'Unused Reservations',
'Unreserved Units',
'Total Reservations', 'Total Units'])
types = instances.keys + reservations.keys
types.uniq.sort.each do |type|
table.add_row [type,
unused_reservations[type],
unreserved_instances[type],
reservations[type],
instances[type]]
end
puts table