Class: Ec2Hosts::Hosts

Inherits:
Object
  • Object
show all
Defined in:
lib/ec2_hosts/hosts.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Hosts

Returns a new instance of Hosts.



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# File 'lib/ec2_hosts/hosts.rb', line 7

def initialize(options = {})
  # Creds must be present in environment
  @ec2 = AWS::EC2.new
  @options = options
  if @options[:tags]
    @processed_tags = process_tags(@options[:tags])
  elsif @options[:template]
    @processed_template = process_template(@options[:template])
  end
end

Instance Attribute Details

#ec2 ⇒ Object (readonly)

Returns the value of attribute ec2.



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# File 'lib/ec2_hosts/hosts.rb', line 4

def ec2
  @ec2
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/ec2_hosts/hosts.rb', line 4

def options
  @options
end

Instance Method Details

#instances ⇒ Object 



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# File 'lib/ec2_hosts/hosts.rb', line 32

def instances
  return @instances if instance_variable_defined?(:@instances)

  if options[:only_running]
    @instances = vpc.instances.filter("instance-state-name", "running")
  else
    @instances = vpc.instances
  end
end

#to_a ⇒ Object 



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# File 'lib/ec2_hosts/hosts.rb', line 42

def to_a
  raw = instances.inject({}) do |memo, inst|
    hostname = ""
    if @processed_tags
      hostname = parse_tags_hostname(@processed_tags, inst.tags.map.to_a.to_h)
    elsif @processed_template
      hostname = parse_template_hostname(@processed_template, inst.tags.map.to_a.to_h)
    else
      hostname = inst.tags["Name"]
    end

    hostname = "" unless hostname_valid?(hostname)

    if hostname == "" && !options[:ignore_missing]
      hostname = inst.private_dns_name.split('.').first
    end

    if hostname != ""
      memo[hostname] = inst
    end

    memo
  end.sort.to_h

  list = []

  raw.each do |hostname, inst|
    begin
      if !options[:public].nil? && hostname.downcase.include?(options[:public])
        if !options[:exclude_public]
          # get public ip address
          if ip = inst.public_ip_address
            list << "#{ip} #{hostname}"
            raise HostError.new
          end
        end
      else
        # get private ip address
        if ip = inst.private_ip_address
          list << "#{ip} #{hostname}"
          raise HostError.new
        end
      end
    rescue HostError; end
  end

  list
end

#vpc ⇒ Object 



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# File 'lib/ec2_hosts/hosts.rb', line 18

def vpc
  return @vpc if instance_variable_defined?(:@vpc)

  vpcs = ec2.vpcs.filter("tag:Name", options[:vpc]).map {|v|v}

  if vpcs.length > 1
    raise ArgumentError.new("Multiple VPCs with name '#{options[:vpc]}' found.")
  elsif vpcs.length == 0
    raise ArgumentError.new("VPC '#{options[:vpc]}' not found.")
  end

  @vpc = vpcs.first
end