Class: Murk::Model::Stack

Inherits:
Object
  • Object
show all
Includes:
Murk, AWS
Defined in:
lib/murk/model/stack.rb

Constant Summary

Constants included from Murk

DEFAULT_OPTIONS

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from AWS

#cloudformation

Methods included from Murk

config_dir, config_file, config_file=, configure, load, logger, #logger, logger=, options

Constructor Details

#initialize(name, env:, user:, template_filename: name + '.json') ⇒ Stack

Returns a new instance of Stack.



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# File 'lib/murk/model/stack.rb', line 14

def initialize(name, env:, user:, template_filename: name + '.json')
  @name = name
  @env = env
  @template = Template.new(template_filename)
  @user = user
  @parameters = []
end

Instance Attribute Details

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/murk/model/stack.rb', line 12

def env
  @env
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/murk/model/stack.rb', line 12

def name
  @name
end

#template ⇒ Object (readonly)

Returns the value of attribute template.



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# File 'lib/murk/model/stack.rb', line 12

def template
  @template
end

#user ⇒ Object (readonly)

Returns the value of attribute user.



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# File 'lib/murk/model/stack.rb', line 12

def user
  @user
end

Instance Method Details

#add_parameter(parameter) ⇒ Object 



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# File 'lib/murk/model/stack.rb', line 26

def add_parameter(parameter)
  if @template.parameter?(parameter.key)
    @parameters << parameter
  else
    fail StackError, "No such parameter '#{parameter.key}' for template '#{@template.filename}'"
  end
end

#create_or_update ⇒ Object 



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# File 'lib/murk/model/stack.rb', line 38

def create_or_update
  fail StackError, "Stack '#{@name}' is in failed state" if failed?
  exists? ? update : create
end

#delete ⇒ Object 



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# File 'lib/murk/model/stack.rb', line 43

def delete
  fail StackError "Stack #{@name} does not exist" unless exists?
  cloudformation.delete_stack(stack_name: qualified_name)
end

#exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/murk/model/stack.rb', line 48

def exists?
  existing.any?
end

#failed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/murk/model/stack.rb', line 52

def failed?
  existing.any? do |stack|
    stack.stack_status =~ /FAILED/
  end
end

#output(key) ⇒ Object 



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# File 'lib/murk/model/stack.rb', line 70

def output(key)
  return unless exists?
  outputs = cloudformation.describe_stacks(stack_name: qualified_name)[:stacks][0][:outputs]
  output = outputs.find { |o| o.output_key == key.to_s }
  output ? output.output_value : nil
end

#parameter_value(parameter_key) ⇒ Object 



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# File 'lib/murk/model/stack.rb', line 34

def parameter_value(parameter_key)
  @parameters.find { |parameter| parameter.key == parameter_key }.resolve
end

#qualified_name ⇒ Object 



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# File 'lib/murk/model/stack.rb', line 62

def qualified_name
  qualified_name = ''
  if Murk.options[:stack_prefix]
    qualified_name += Murk.options[:stack_prefix] + '-'
  end
  qualified_name + "#{@env}-#{@user}-#{@name}"
end

#template_filename=(template_filename) ⇒ Object 



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# File 'lib/murk/model/stack.rb', line 22

def template_filename=(template_filename)
  @template = Template.new(template_filename)
end

#wait(state) ⇒ Object 



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# File 'lib/murk/model/stack.rb', line 58

def wait state
  cloudformation.wait_forever(:stack_create_complete, stack_name: qualified_name) { yield if block_given? }
end