Class: Haas::Aws

Inherits:
Object
  • Object
show all
Defined in:
lib/haas/aws.rb

Constant Summary collapse

CENTOS_IMAGES = 
{
  "6.5" => {
    "us-east-1"=>"ami-8997afe0",
    "us-west-2"=>"ami-b6bdde86",
    "us-west-1"=>"ami-1a013c5f",
    "eu-west-1"=>"ami-42718735",
    "ap-southeast-1"=>"ami-a08fd9f2",
    "ap-southeast-2"=>"ami-e7138ddd",
    "ap-northeast-1"=>"ami-81294380",
    "sa-east-1"=>"ami-7d02a260"
  },
  "7" => {
    "us-east-1"=>"ami-96a818fe",
    "us-west-2"=>"ami-c7d092f7",
    "us-west-1"=>"ami-6bcfc42e",
    "eu-west-1"=>"ami-e4ff5c93",
    "ap-southeast-1"=>"ami-aea582fc",
    "ap-southeast-2"=>"ami-bd523087",
    "ap-northeast-1"=>"ami-89634988",
    "sa-east-1"=>"ami-bf9520a2"
  }
}

Class Method Summary collapse

Class Method Details

.connect ⇒ Object 



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# File 'lib/haas/aws.rb', line 28

def self.connect
  @region = Haas::Config.options[:aws_region] || 'us-east-1'
  AWS.config(
    access_key_id: ENV['AWS_KEY'],
    secret_access_key: ENV['AWS_SECRET'],
    region: region
  )
  @ec2 = AWS::EC2.new
end

.create_key_pair ⇒ Object 



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# File 'lib/haas/aws.rb', line 61

def self.create_key_pair
  key_pair = Haas::KeyPair.create(name: Haas.cluster.name)
  File.write(Haas.cluster.identity_file_path, key_pair.private_key)
  File.chmod(0600, Haas.cluster.identity_file_path)
end

.ec2 ⇒ Object 



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# File 'lib/haas/aws.rb', line 38

def self.ec2
  @ec2
end

.is_cluster_ssh_open?(instances) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/haas/aws.rb', line 135

def self.is_cluster_ssh_open?(instances)
  instances.each do |instance|
    return false unless Haas::Utils.is_port_open?(instance.public_dns_name,22)
  end
  return true
end

.launch_instances ⇒ Object 



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# File 'lib/haas/aws.rb', line 67

def self.launch_instances
  image_id = CENTOS_IMAGES["6.5"][region]

  if !ec2.security_groups.filter('group-name', 'haas-security-group').first
    security_group = ec2.security_groups.create('haas-security-group')
    security_group.authorize_ingress(:tcp, 22)
    security_group.authorize_ingress(:tcp, 80)
    security_group.authorize_ingress(:tcp, 443)
    security_group.authorize_ingress(:tcp, 8080)
    security_group.authorize_ingress(:tcp, 0..65535, security_group)
    security_group.authorize_ingress(:udp, 0..65535, security_group)
    security_group.authorize_ingress(:icmp, -1, security_group)
  end

  instances = ec2.instances.create({
    :image_id => image_id,
    :instance_type => Haas::Config.options[:instance_type],
    :key_name => Haas.cluster.name,
    :security_groups => ['haas-security-group'],
    :block_device_mappings => [
      {
        :device_name => "/dev/sda",
        :ebs => {
          :volume_size => 8, # 8 GiB
          :delete_on_termination => true
        }
      },
      {
        :device_name => "/dev/sdf",
        :virtual_name => "ephemeral0"
      }
    ],
    :count => Haas::Config.options[:nb_instances].to_i
  })

  print "Waiting for the instances to start "
  while instances.any? {|i| i.status == :pending; } do
    print '.'
    sleep 1
  end
  puts " done"

  print "Waiting for the instances to be initialized and accessible "
  while !is_cluster_ssh_open?(instances) do
    print '.'
    sleep 1
  end
  puts " done"

  instances.each do |instance|
    Haas::Node.create(
      cluster_id: Haas.cluster.id,
      instance_id: instance.id,
      public_ip_address: instance.ip_address,
      public_dns_name: instance.public_dns_name,
      private_ip_address: instance.private_ip_address,
      private_dns_name: instance.private_dns_name
    )
  end
end

.nb_instance_available ⇒ Object 



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# File 'lib/haas/aws.rb', line 46

def self.nb_instance_available
   = ec2.client.\
  .data[:account_attribute_set]\
  .inject({}) do |m, i|
    m[i[:attribute_name]] = i[:attribute_value_set].first[:attribute_value]; m
  end

  max_instances = ["max-instances"].to_i
  return max_instances - nb_running_instances
end

.nb_running_instances ⇒ Object 



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# File 'lib/haas/aws.rb', line 57

def self.nb_running_instances
  ec2.instances.inject({}) { |m, i| i.status == :running ? m[i.id] = i.status : nil; m }.length
end

.region ⇒ Object 



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# File 'lib/haas/aws.rb', line 42

def self.region
  @region
end

.terminate_cluster(cluster) ⇒ Object 



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# File 'lib/haas/aws.rb', line 128

def self.terminate_cluster cluster
  ec2.client.terminate_instances({
    instance_ids: cluster.nodes.map(&:instance_id)
  })
  cluster.destroy
end