class Instance::Finder

Constants

VERSION

Public Class Methods

instances(tags, states=['running']) click to toggle source
# File lib/instance_finder.rb, line 7
def instances(tags, states=['running'])
  finder = Instance::Finder.new
  finder.instances(tags, states)
end
new() click to toggle source
# File lib/instance_finder.rb, line 13
def initialize
  @ec2 = Aws::EC2::Client.new
end

Public Instance Methods

instances(tags, states=['running']) click to toggle source
# File lib/instance_finder.rb, line 17
def instances(tags, states=['running'])
  output = []
  results = @ec2.describe_instances filters: make_filters(tags, states)
  results.reservations.each do |reservation|
    reservation.instances.each do |instance|
      output << {
        instance_id: instance.instance_id,
        private_ip_address: instance.private_ip_address,
        private_dns_name: instance.private_dns_name,
        public_ip_address: instance.public_ip_address,
        public_dns_name: instance.public_dns_name,
        subnet_id: instance.subnet_id,
        vpc_id: instance.vpc_id,
        availability_zone: instance.placement.availability_zone,
        tags: coerce_tags(instance.tags),
      }
    end
  end
  output
end

Private Instance Methods

coerce_tags(tags) click to toggle source
# File lib/instance_finder.rb, line 56
def coerce_tags(tags)
  tags.map do |tag|
    { tag.key => tag.value }
  end
end
make_filters(tags, states) click to toggle source
# File lib/instance_finder.rb, line 40
def make_filters(tags, states)
  filters = [
    {
      name: 'instance-state-name',
      values: Array(states),
    },
  ]
  tags.each do |key, value|
    filters << {
      name: "tag:#{key}",
      values: Array(value),
    }
  end
  filters
end