Class: VmShepherd::AwsManager

Inherits:
Object
  • Object
show all
Includes:
RetryHelper
Defined in:
lib/vm_shepherd/aws_manager.rb

Constant Summary collapse

OPS_MANAGER_INSTANCE_TYPE = 
't2.medium'
DO_NOT_TERMINATE_TAG_KEY = 
'do_not_terminate'
ELB_SECURITY_GROUP_NAME = 
'ELB Security Group'
CREATE_IN_PROGRESS = 
'CREATE_IN_PROGRESS'
CREATE_COMPLETE = 
'CREATE_COMPLETE'
UPDATE_IN_PROGRESS = 
'UPDATE_IN_PROGRESS'
UPDATE_COMPLETE = 
'UPDATE_COMPLETE'
UPDATE_COMPLETE_CLEANUP_IN_PROGRESS = 
'UPDATE_COMPLETE_CLEANUP_IN_PROGRESS'
ROLLBACK_IN_PROGRESS = 
'ROLLBACK_IN_PROGRESS'
ROLLBACK_COMPLETE = 
'ROLLBACK_COMPLETE'
DELETE_IN_PROGRESS = 
'DELETE_IN_PROGRESS'
DELETE_COMPLETE = 
'DELETE_COMPLETE'
DELETE_FAILED = 
'DELETE_FAILED'

Constants included from RetryHelper

RetryHelper::RETRY_INTERVAL, RetryHelper::RETRY_LIMIT

Instance Method Summary collapse

Methods included from RetryHelper

#retry_until

Constructor Details

#initialize(env_config:, logger:) ⇒ AwsManager

Returns a new instance of AwsManager.



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# File 'lib/vm_shepherd/aws_manager.rb', line 25

def initialize(env_config:, logger:)
  AWS.config(
    access_key_id: env_config.fetch('aws_access_key'),
    secret_access_key: env_config.fetch('aws_secret_key'),
    region: env_config.fetch('region'),
  )
  @env_config = env_config
  @logger = logger
end

Instance Method Details

#clean_environment ⇒ Object 



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# File 'lib/vm_shepherd/aws_manager.rb', line 124

def clean_environment
  env_config.fetch('outputs').fetch('subnets').each do |aws_subnet_id|
    clear_subnet(aws_subnet_id) if aws_subnet_id
  end

  env_config.fetch('elbs', []).each do |elb_config|
    delete_elb(elb_config['name'])
  end

  bucket_names = env_config.fetch('outputs', {}).fetch('s3_bucket_names', []).compact
  bucket_names.each do |bucket_name|
    next if bucket_name.empty?
    bucket = AWS::S3.new.buckets[bucket_name]
    if bucket && bucket.exists?
      logger.info("clearing bucket: #{bucket_name}")
      bucket.clear!
    end
  end

  delete_stack(env_config.fetch('stack_name'))
end

#deploy(ami_file_path:, vm_config:) ⇒ Object 



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# File 'lib/vm_shepherd/aws_manager.rb', line 87

def deploy(ami_file_path:, vm_config:)
  logger.info('Starting AMI Instance creation')
  instance =
    retry_until do
      begin
        AWS.ec2.instances.create(instance_create_params(ami_file_path, vm_config))
      rescue AWS::EC2::Errors::InvalidIPAddress::InUse
        false
      end
    end

  logger.info('waiting until the instance status is running')
  retry_until do
    begin
      status = instance.status
      logger.info("current status: #{status}")
      status == :running
    rescue AWS::EC2::Errors::InvalidInstanceID::NotFound
      false
    end
  end

  vm_ip_address = vm_config.fetch('vm_ip_address', nil)
  if vm_ip_address
    logger.info('Associating existing IP to the instance')
    elastic_ip = AWS::EC2::ElasticIp.new(vm_ip_address)
  else
    logger.info('Creating an Elastic IP and assigning it to the instance')
    elastic_ip = AWS.ec2.elastic_ips.create(vpc: true)
    retry_until do
      elastic_ip.exists?
    end
  end
  instance.associate_elastic_ip(elastic_ip)
  instance.add_tag('Name', value: vm_config.fetch('vm_name'))
end

#destroy(vm_config) ⇒ Object 



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# File 'lib/vm_shepherd/aws_manager.rb', line 146

def destroy(vm_config)
  AWS.ec2.instances.with_tag('Name', vm_config.fetch('vm_name')).each do |instance|
    if instance.tags['Name'] == vm_config.fetch('vm_name')
      vm_ip_address = vm_config.fetch('vm_ip_address', nil)
      elastic_ip = instance.elastic_ip unless vm_ip_address
      if elastic_ip
        elastic_ip.disassociate
        elastic_ip.delete
      end
      instance.terminate
    end
  end
end

#prepare_environment(cloudformation_template_file) ⇒ Object 



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# File 'lib/vm_shepherd/aws_manager.rb', line 35

def prepare_environment(cloudformation_template_file)
  template = File.read(cloudformation_template_file)

  cfm = AWS::CloudFormation.new
  stack_name = env_config.fetch('stack_name')

  stack = cfm.stacks[stack_name]

  if stack and env_config.fetch('update_existing', false)
    logger.info('Found existing stack - upgrading it')
    stack.update(:template => template, parameters: env_config.fetch('parameters'), capabilities: ['CAPABILITY_IAM'])
    waiting_for_status = UPDATE_COMPLETE
  else
    logger.info('Starting CloudFormation Stack Creation')
    stack = cfm.stacks.create(stack_name, template, parameters: env_config.fetch('parameters'), capabilities: ['CAPABILITY_IAM'])
    waiting_for_status = CREATE_COMPLETE
  end

  logger.info("Waiting for status [#{waiting_for_status}] on stack [#{stack.name}]")
  retry_until(retry_limit: 60, retry_interval: 30) do
    status = stack.status
    logger.info("current stack status: #{status}")
    case status
      when CREATE_COMPLETE
        true
      when UPDATE_COMPLETE
        true
      when CREATE_IN_PROGRESS
        false
      when UPDATE_IN_PROGRESS
        false
      when UPDATE_COMPLETE_CLEANUP_IN_PROGRESS
        false
      when ROLLBACK_IN_PROGRESS
        false
      else
        if ROLLBACK_COMPLETE == status
          logger.info("Rolling back stack [#{stack.name}]; events listed below")
          stack.events.select { |event| event.resource_status_reason }.each do |failed_event|
            logger.info("#{failed_event.resource_properties} #{failed_event.resource_status_reason}")
          end
          stack.delete
        end
        raise "Unexpected status for stack #{env_config.fetch('stack_name')} : #{status}"
    end
  end

  env_config.fetch('elbs', []).each do |elb_config|
    create_elb(stack, elb_config)
  end
end