Class: EC2::Host::ClientUtil

Inherits:
Object
  • Object
show all
Defined in:
lib/ec2/host/client_util.rb

Class Method Summary collapse

Class Method Details

.get_instance_id ⇒ Object 



15
16
17
18
19
20
21
22
23
24
 
# File 'lib/ec2/host/client_util.rb', line 15

def self.get_instance_id
  return @instance_id if @instance_id
  begin
    http_conn = Net::HTTP.new('169.254.169.254')
    http_conn.open_timeout = 5
    @instance_id = http_conn.start {|http| http.get('/latest/meta-data/instance-id').body }
  rescue Net::OpenTimeout
    raise "HTTP connection to 169.254.169.254 is timeout. Probably, not an EC2 instance?"
  end
end

.get_instances ⇒ Object 



7
8
9
10
11
12
13
 
# File 'lib/ec2/host/client_util.rb', line 7

def self.get_instances
  # I do not use describe_instances(filter:) because it does not support array tag ..
  return @instances if @instances
  Aws.config.update(region: Config.aws_region, credentials: Config.aws_credentials)
  ec2 = Aws::EC2::Client.new
  @instances = ec2.describe_instances.reservations.map(&:instances).flatten
end