Class: Jets::Commands::Delete

Inherits:
Object
  • Object
show all
Includes:
AwsServices
Defined in:
lib/jets/commands/delete.rb

Instance Method Summary collapse

Methods included from AwsServices

#apigateway, #aws_lambda, #cfn, #dynamodb, #logs, #s3, #s3_resource, #sns, #sqs, #sts

Methods included from AwsServices::StackStatus

#lookup, #stack_exists?, #stack_in_progress?

Methods included from AwsServices::GlobalMemoist

included

Constructor Details

#initialize(options) ⇒ Delete

Returns a new instance of Delete.



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# File 'lib/jets/commands/delete.rb', line 4

def initialize(options)
  @options = options
end

Instance Method Details

#are_you_sure? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jets/commands/delete.rb', line 116

def are_you_sure?
  if @options[:yes]
    sure = 'y'
  else
    puts "Are you sure you want to want to delete the #{Jets.config.project_namespace.color(:green)} project? (y/N)"
    sure = $stdin.gets
  end

  unless sure =~ /^y/
    puts "Phew! Jets #{Jets.config.project_namespace.color(:green)} project was not deleted."
    exit 0
  end
end

#bucket_exists?(bucket_name) ⇒ Boolean

Thanks: docs.aws.amazon.com/sdk-for-ruby/v3/developer-guide/s3-example-does-bucket-exist.html

Returns:

  • (Boolean) 


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# File 'lib/jets/commands/delete.rb', line 102

def bucket_exists?(bucket_name)
  bucket_exists = false
  begin
    resp = s3.head_bucket(bucket: bucket_name, use_accelerate_endpoint: false)
    bucket_exists = true
  rescue
  end
  bucket_exists
end

#check_deleteable_status ⇒ Object

All CloudFormation states listed here: docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-describing-stacks.html

Returns resp so we can use it to grab data about the stack without calling api again.



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# File 'lib/jets/commands/delete.rb', line 133

def check_deleteable_status
  return true if !stack_exists?(@parent_stack_name)

  # Assumes stack exists
  resp = cfn.describe_stacks(stack_name: @parent_stack_name)
  status = resp.stacks[0].stack_status

  return true if status == 'ROLLBACK_COMPLETE'

  if status =~ /_IN_PROGRESS$/
    puts "The '#{@parent_stack_name}' stack status is #{status}. " \
         "It is not in an updateable status. Please wait until the stack is ready and try again.".color(:red)
    exit 0
  elsif resp.stacks[0].outputs.empty?
    # This Happens when the miminal stack fails at the very beginning.
    # There is no s3 bucket at all.  User should delete the stack.
    puts "The minimal stack failed to create. Please delete the stack first and try again. " \
    "You can delete the CloudFormation stack or use the `jets delete` command"
    exit 0
  else
    true
  end
end

#confirm_project_exists ⇒ Object 



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# File 'lib/jets/commands/delete.rb', line 46

def confirm_project_exists
  retries = 0
  begin
    cfn.describe_stacks(stack_name: parent_stack_name)
  rescue Aws::CloudFormation::Errors::ValidationError
    # Aws::CloudFormation::Errors::ValidationError is thrown when the stack
    # does not exist
    puts "The parent stack #{Jets.config.project_namespace.color(:green)} for the project #{Jets.config.project_name.color(:green)} does not exist. So it cannot be deleted."
    exit 0
  rescue Aws::CloudFormation::Errors::Throttling => e
    retries += 1
    seconds = 2 ** retries

    puts "WARN: confirm_project_exists #{e.class} #{e.message}".color(:yellow)
    puts "Backing off and will retry in #{seconds} seconds."
    sleep(seconds)
    if seconds > 90 # 2 ** 6 is 64 so will give up after 6 retries
      puts "Giving up after #{retries} retries"
    else
      retry
    end
  end
end

#delete_logs ⇒ Object 



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# File 'lib/jets/commands/delete.rb', line 40

def delete_logs
  puts "Deleting CloudWatch logs"
  log = Jets::Commands::Clean::Log.new(mute: true, yes: true)
  log.clean
end

#empty_s3_bucket ⇒ Object 



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# File 'lib/jets/commands/delete.rb', line 70

def empty_s3_bucket
  return unless s3_bucket_name # Happens when minimal stack fails to build
  return unless bucket_exists?(s3_bucket_name)

  resp = s3.list_objects(bucket: s3_bucket_name)
  if resp.contents.size > 0
    # IE: objects = [{key: "objectkey1"}, {key: "objectkey2"}]
    objects = resp.contents.map { |item| {key: item.key} }
    s3.delete_objects(
      bucket: s3_bucket_name,
      delete: {
        objects: objects,
        quiet: false,
      }
    )
    empty_s3_bucket # keep deleting objects until bucket is empty
  end
end

#parent_stack_name ⇒ Object 



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# File 'lib/jets/commands/delete.rb', line 112

def parent_stack_name
  Jets::Naming.parent_stack_name
end

#run ⇒ Object 



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# File 'lib/jets/commands/delete.rb', line 8

def run
  puts("Deleting project...")
  return if @options[:noop]

  are_you_sure?

  confirm_project_exists

  # Must first remove all objects from s3 bucket in order to delete stack
  puts "First, deleting objects in s3 bucket #{s3_bucket_name}" if s3_bucket_name
  empty_s3_bucket

  stack_in_progress?(parent_stack_name)

  cfn.delete_stack(stack_name: parent_stack_name)
  puts "Deleting #{Jets.config.project_namespace.color(:green)}..."

  wait_for_stack if @options[:wait]

  delete_logs

  puts "Project #{Jets.config.project_namespace.color(:green)} deleted!"
end

#s3_bucket_name ⇒ Object 



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# File 'lib/jets/commands/delete.rb', line 89

def s3_bucket_name
  return @s3_bucket_name if defined?(@s3_bucket_name)

  resp = cfn.describe_stacks(stack_name: parent_stack_name)
  outputs = resp.stacks[0].outputs
  if outputs.empty?
    @s3_bucket_name = false
  else
    @s3_bucket_name = outputs.find {|o| o.output_key == 'S3Bucket'}.output_value
  end
end

#wait_for_stack ⇒ Object 



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# File 'lib/jets/commands/delete.rb', line 32

def wait_for_stack
  status = Jets::Cfn::Status.new(@options)
  start_time = Time.now
  status.wait
  took = Time.now - start_time
  puts "Time took for deletion: #{status.pretty_time(took).color(:green)}."
end