Class: CfnVpn::Deployer

Inherits:
Object
  • Object
show all
Defined in:
lib/cfnvpn/deployer.rb

Instance Method Summary collapse

Constructor Details

#initialize(region, name) ⇒ Deployer

Returns a new instance of Deployer.



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# File 'lib/cfnvpn/deployer.rb', line 10

def initialize(region,name)
  @name = name
  @stack_name = "#{@name}-cfnvpn"
  @client = Aws::CloudFormation::Client.new(region: region)
end

Instance Method Details

#create_change_set(template_body: nil, parameters: {}) ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 32

def create_change_set(template_body: nil, parameters: {})
  change_set_name = "#{@stack_name}-#{CfnVpn::CHANGE_SET_VERSION}-#{Time.now.utc.strftime("%Y%m%d%H%M%S")}"
  change_set_type = get_change_set_type()

  if !template_body.nil?
    params = get_parameters_from_template(template_body)
  else
    params = get_parameters_from_stack()
  end
  
  params.each do |param|
    if !parameters[param[:parameter_key]].nil?
      param[:parameter_value] = parameters[param[:parameter_key]]
      param[:use_previous_value] = false
    end
  end

  changeset_args = {
    stack_name: @stack_name,
    parameters: params,
    tags: [
      {
        key: "cfnvpn:version",
        value: CfnVpn::VERSION,
      },
      {
        key: "cfnvpn:name",
        value: @name,
      }
    ],
    change_set_name: change_set_name,
    change_set_type: change_set_type,
    capabilities: ['CAPABILITY_IAM']
  }

  if !template_body.nil?
    changeset_args[:template_body] = template_body
  else
    changeset_args[:use_previous_template] = true
  end

  CfnVpn::Log.logger.debug "Creating changeset"
  change_set = @client.create_change_set(changeset_args)
  return change_set, change_set_type
end

#does_cf_stack_exist ⇒ Object

TODO: check for REVIEW_IN_PROGRESS



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# File 'lib/cfnvpn/deployer.rb', line 17

def does_cf_stack_exist()
  begin
    resp = @client.describe_stacks({
      stack_name: @stack_name,
    })
  rescue Aws::CloudFormation::Errors::ValidationError
    return false
  end
  return resp.size > 0
end

#execute_change_set(change_set_id) ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 95

def execute_change_set(change_set_id)
  CfnVpn::Log.logger.debug "Executing the changeset"
  stack = @client.execute_change_set({
    change_set_name: change_set_id
  })
end

#get_change_set(change_set_id) ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 89

def get_change_set(change_set_id)
  @client.describe_change_set({
    change_set_name: change_set_id,
  })
end

#get_change_set_type ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 28

def get_change_set_type()
  return does_cf_stack_exist() ? 'UPDATE' : 'CREATE'
end

#get_outputs_from_stack ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 133

def get_outputs_from_stack()
  resp = @client.describe_stacks({
    stack_name: @stack_name,
  })
  stack = resp.stacks.first
  return Hash[stack.outputs.collect {|output| [output.output_key.underscore.to_sym, output.output_value]}]
end

#get_parameter_value(parameter) ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 118

def get_parameter_value(parameter)
  resp = @client.describe_stacks({ stack_name: @stack_name })
  stack = resp.stacks.first
  parameter = stack.parameters.detect {|p| p.parameter_key == parameter}
  return parameter ? parameter.parameter_value : nil
end

#get_parameters_from_stack ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 108

def get_parameters_from_stack()
  resp = @client.get_template_summary({ stack_name: @stack_name })
  return resp.parameters.collect { |p| { parameter_key: p.parameter_key, use_previous_value: true }  }
end

#get_parameters_from_stack_hash ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 125

def get_parameters_from_stack_hash()
  resp = @client.describe_stacks({
    stack_name: @stack_name,
  })
  stack = resp.stacks.first
  return Hash[stack.parameters.collect {|parameter| [parameter.parameter_key.to_sym, parameter.parameter_value]}]
end

#get_parameters_from_template(template_body) ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 113

def get_parameters_from_template(template_body)
  resp = @client.get_template_summary({ template_body: template_body })
  return resp.parameters.collect { |p| { parameter_key: p.parameter_key, parameter_value: p.default_value }  }
end

#wait_for_changeset(change_set_id) ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 78

def wait_for_changeset(change_set_id)
  CfnVpn::Log.logger.debug "Waiting for changeset to be created"
  begin
    @client.wait_until :change_set_create_complete, change_set_name: change_set_id
  rescue Aws::Waiters::Errors::FailureStateError => e
    change_set = get_change_set(change_set_id)
    CfnVpn::Log.logger.error("change set status: #{change_set.status} reason: #{change_set.status_reason}")
    exit 1
  end
end

#wait_for_execute(change_set_type) ⇒ Object 



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# File 'lib/cfnvpn/deployer.rb', line 102

def wait_for_execute(change_set_type)
  waiter = change_set_type == 'CREATE' ? :stack_create_complete : :stack_update_complete
  CfnVpn::Log.logger.info "Waiting for changeset to #{change_set_type}"
  resp = @client.wait_until waiter, stack_name: @stack_name
end