Class: Convection::Control::Cloud

Inherits:
Object
  • Object
show all
Defined in:
lib/convection/control/cloud.rb

Overview

Control tour Clouds

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#cloudfile ⇒ Object

Returns the value of attribute cloudfile.



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# File 'lib/convection/control/cloud.rb', line 10

def cloudfile
  @cloudfile
end

Instance Method Details

#configure(cloudfile) ⇒ Object 



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# File 'lib/convection/control/cloud.rb', line 11

def configure(cloudfile)
  @cloudfile = Model::Cloudfile.new(cloudfile)
end

#converge(to_stack, options = {}, &block) ⇒ Object 



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# File 'lib/convection/control/cloud.rb', line 84

def converge(to_stack, options = {}, &block)
  if to_stack && !stacks.include?(to_stack)
    block.call(Model::Event.new(:error, "Undefined Stack #{ to_stack }", :error)) if block
    return
  end

  exit 1 if stack_initialization_errors?(&block)

  filter_deck(options, &block).each_value do |stack|
    block.call(Model::Event.new(:converge, "Stack #{ stack.name }", :info)) if block
    stack.apply(retain: options[:retain], &block)

    emit_credential_error_and_exit!(stack, &block) if stack.credential_error?
    if stack.error?
      block.call(Model::Event.new(:error, "Error converging stack #{ stack.name }", :error), stack.errors) if block
      break
    end

    ## Stop on converge error
    break unless stack.success?

    ## Stop here
    break if !to_stack.nil? && stack.name == to_stack
    sleep rand @cloudfile.splay || 2
  end
end

#delete(stacks, &block) ⇒ Object 



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# File 'lib/convection/control/cloud.rb', line 111

def delete(stacks, &block)
  exit 1 if stack_initialization_errors?(&block)

  stacks.each do |stack|
    unless stack.exist?
      block.call(Model::Event.new(:delete_skipped, "Stack #{ stack.cloud_name } does not exist remotely", :warn))
      next
    end

    block.call(Model::Event.new(:delete, "Delete remote stack #{ stack.cloud_name }", :info)) if block
    stack.delete(&block)

    if stack.error?
      block.call(Model::Event.new(:error, "Error deleting stack #{ stack.name }", :error), stack.errors) if block
      break
    end

    break unless stack.delete_success?

    sleep rand @cloudfile.splay || 2
  end
end

#diff(to_stack, options = {}, &block) ⇒ Object 



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# File 'lib/convection/control/cloud.rb', line 134

def diff(to_stack, options = {}, &block)
  if to_stack && !stacks.include?(to_stack)
    block.call(Model::Event.new(:error, "Undefined Stack #{ to_stack }", :error)) if block
    return
  end

  exit 1 if stack_initialization_errors?(&block)

  filter_deck(options, &block).each_value do |stack|
    block.call(Model::Event.new(:compare, "Compare local state of stack #{ stack.name } (#{ stack.cloud_name }) with remote template", :info))

    difference = stack.diff(retain: options[:retain])
    # Find errors during diff
    emit_credential_error_and_exit!(stack, &block) if stack.credential_error?
    if stack.error?
      errors = stack.errors.collect { |x| x.exception.message }
      errors = errors.uniq.flatten
      block.call(Model::Event.new(:error, "Error diffing stack #{ stack.name} Error(s): #{errors.join(', ')}", :error), stack.errors) if block
      break
    end

    if difference.empty?
      difference << Model::Event.new(:unchanged, "Stack #{ stack.cloud_name } has no changes", :info)
    end

    difference.each { |diff| block.call(diff) }

    break if !to_stack.nil? && stack.name == to_stack
  end
end

#emit_credential_error_and_exit!(stack, &block) ⇒ Object 



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# File 'lib/convection/control/cloud.rb', line 182

def emit_credential_error_and_exit!(stack, &block)
  event = Model::Event.new(:error, "Credentials expired while converging #{ stack.name }. " \
                           'Visit the AWS console to track progress of the stack being created/updated.', :error)
  block.call(event, stack.errors) if block
  exit 1
end

#filter_deck(options = {}, &block) ⇒ Object 



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# File 'lib/convection/control/cloud.rb', line 24

def filter_deck(options = {}, &block)
  # throw an error if the user specifies more than one (stack group, list of stacks, exclusion list of stacks)
  if (options[:stack_group] && options[:stacks]) ||
     (options[:stack_group] && options[:exclude_stacks]) ||
     (options[:stacks] && options[:exclude_stacks])
    block.call(Model::Event.new(:error, 'Cannot specify --stack-group , --stack-list, or --exclude-stacks at the same time as each other', :error)) if block
    return {}
  end

  if options[:stack_group] || options[:stacks]
    # throw an error if the user specifies a nonexistent stack groups
    if options[:stack_group] && !stack_groups.key?(options[:stack_group])
      block.call(Model::Event.new(:error, "Unknown stack group: #{options[:stack_group]}", :error)) if block
      return {}
    end

    # throw an error if the user specifies nonexistent stacks
    if Array(options[:stacks]).any? { |name| !@cloudfile.stacks.key?(name) }
      bad_stack_names = options[:stacks].reject { |name| @cloudfile.stacks.key?(name) }
      block.call(Model::Event.new(:error, "Undefined Stack(s) #{bad_stack_names.join(', ')}", :error)) if block
      return {}
    end

    filter = Array(stack_groups[options[:stack_group]] || options[:stacks])
    filter.reduce({}) do |result, stack_name|
      result.merge(stack_name => @cloudfile.stacks[stack_name])
    end

  elsif options[:exclude_stacks]
    # throw an error if the user specifies nonexistent excluded stacks
    if Array(options[:exclude_stacks]).any? { |name| !@cloudfile.stacks.key?(name) }
      bad_stack_names = options[:exclude_stacks].reject { |name| @cloudfile.stacks.key?(name) }
      block.call(Model::Event.new(:error, "Undefined Stack(s) #{bad_stack_names.join(', ')}", :error)) if block
      return {}
    end

    filter = Array(options[:exclude_stacks])
    return stacks.reject { |stack_name| filter.include? stack_name }

  else
    # if no filter is specified, return the entire deck
    return stacks

  end
end

#stack_groups ⇒ Object 



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# File 'lib/convection/control/cloud.rb', line 20

def stack_groups
  @cloudfile.stack_groups
end

#stack_initialization_errors?(&block) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/convection/control/cloud.rb', line 165

def stack_initialization_errors?(&block)
  errors = []
  # Find errors during stack init
  stacks.each_value do |stack|
    if stack.error?
      errors += stack.errors.collect { |x| x.exception.message }
    end
  end

  unless errors.empty?
    errors = errors.uniq.flatten
    block.call(Model::Event.new(:error, "Error(s) during stack initialization #{errors.join(', ')}", :error), errors) if block
    return true
  end
  false
end

#stacks ⇒ Object

See Also:



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# File 'lib/convection/control/cloud.rb', line 16

def stacks
  @cloudfile.stacks
end

#stacks_until(last_stack_name, options = {}, &block) ⇒ Object 



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# File 'lib/convection/control/cloud.rb', line 70

def stacks_until(last_stack_name, options = {}, &block)
  stacks = filter_deck(options, &block).values
  return stacks if last_stack_name.nil?

  last_stack = stacks.find { |stack| stack.name == last_stack_name }
  unless last_stack
    block.call(Model::Event.new(:error, "Stacks filter did not include last stack #{ last_stack }", :error)) if block
    return []
  end

  last_stack_index = stacks.index(last_stack)
  stacks[0..last_stack_index]
end