Class: DPL::Provider::Lambda

Inherits:
DPL::Provider show all
Defined in:
lib/dpl/provider/lambda.rb

Instance Attribute Summary

Attributes inherited from DPL::Provider

#context, #options

Instance Method Summary collapse

Methods inherited from DPL::Provider

apt_get, #check_app, #commit_msg, context, #create_key, #default_text_charset, #default_text_charset?, #deploy, deprecated, #detect_encoding?, #encoding_for, #error, experimental, #initialize, #log, new, npm_g, #option, pip, requires, #run, #setup_git_credentials, #setup_git_ssh, #sha, shell, #user_agent, #warn

Constructor Details

This class inherits a constructor from DPL::Provider

Instance Method Details

#check_auth ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 160

def check_auth
  log "Using Access Key: #{option(:access_key_id)[-4..-1].rjust(20, '*')}"
end

#cleanup ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 229

def cleanup
end

#create_zip(dest_file_path, src_directory_path, files) ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 146

def create_zip(dest_file_path, src_directory_path, files)
  Zip::File.open(dest_file_path, Zip::File::CREATE) do |zipfile|
    files.each do |file|
      zipfile.add(file.sub(src_directory_path + File::SEPARATOR, ''), file)
    end
  end

  dest_file_path
end

#dead_letter_arn ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 176

def dead_letter_arn
  options[:dead_letter_arn] ? { :target_arn => options[:dead_letter_arn]} : nil
end

#default_description ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 200

def default_description
  "Deploy build #{context.env['TRAVIS_BUILD_NUMBER']} to AWS Lambda via Travis CI"
end

#default_kms_key_arn ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 184

def default_kms_key_arn
  nil
end

#default_memory_size ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 204

def default_memory_size
  128
end

#default_module_name ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 208

def default_module_name
  'index'
end

#default_runtime ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 192

def default_runtime
  'nodejs'
end

#default_timeout ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 196

def default_timeout
  3 # seconds
end

#environment_variables ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 172

def environment_variables
  options[:environment_variables] ? { :variables => split_string_array_to_hash(options[:environment_variables]) } : nil
end

#function_tags ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 188

def function_tags
  options[:function_tags] ? split_string_array_to_hash(options[:function_tags]) : nil
end

#function_zip ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 112

def function_zip
  target_zip_path = File.absolute_path(options[:zip] || Dir.pwd)
  dest_file_path = output_file_path

  if File.directory?(target_zip_path)
    zip_directory(dest_file_path, target_zip_path)
  elsif File.file?(target_zip_path)
    zip_file(dest_file_path, target_zip_path)
  else
    error('Invalid zip option. If set, must be path to directory, js file, or a zip file.')
  end

  File.new(dest_file_path)
end

#handler ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 105

def handler
  module_name = options[:module_name] || default_module_name
  handler_name = option(:handler_name)

  "#{module_name}.#{handler_name}"
end

#lambda ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 11

def lambda
  @lambda ||= ::Aws::Lambda::Client.new(lambda_options)
end

#lambda_options ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 15

def lambda_options
  {
      region:      options[:region] || 'us-east-1',
      credentials: ::Aws::Credentials.new(option(:access_key_id), option(:secret_access_key))
  }
end

#needs_key? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dpl/provider/lambda.rb', line 156

def needs_key?
  false
end

#output_file_path ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 164

def output_file_path
  @output_file_path ||= '/tmp/' + random_chars(8) + '-lambda.zip'
end

#publish ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 212

def publish
  !!options[:publish]
end

#push_app ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 22

def push_app

  # The original LambdaPreview client supported create/update in one call
  # To keep compatibility we try to fetch the function and then decide
  # whether to update the code or create a new function

  function_name = options[:name] || option(:function_name)
  
  begin
    response = lambda.get_function({function_name: function_name})

    log "Function #{function_name} already exists, updating."

    # Options defined at
    #   https://docs.aws.amazon.com/sdkforruby/api/Aws/Lambda/Client.html#update_function_configuration-instance_method
    response = lambda.update_function_configuration({
                 function_name:        function_name,
                 description:          options[:description]    || default_description,
                 timeout:              options[:timeout]        || default_timeout,
                 memory_size:          options[:memory_size]    || default_memory_size,
                 role:                 option(:role),
                 handler:              handler,
                 runtime:              options[:runtime]        || default_runtime,
                 vpc_config:           vpc_config,
                 environment:          environment_variables,
                 dead_letter_config:   dead_letter_arn,
                 kms_key_arn:          options[:kms_key_arn] || default_kms_key_arn,
                 tracing_config:       tracing_mode
               })

    log "Updated configuration of function: #{response.function_name}."

    if function_tags
      log "Add tags to function #{response.function_name}."
      response = lambda.tag_resource({
              resource: response.function_arn,
              tags: function_tags
            })
    end

    # Options defined at
    #   https://docs.aws.amazon.com/sdkforruby/api/Aws/Lambda/Client.html#update_function_code-instance_method
    response = lambda.update_function_code({
                                             function_name:  options[:name] || option(:function_name),
                                             zip_file:       function_zip,
                                             publish:        publish
                                         })

    log "Updated code of function: #{response.function_name}."
  rescue ::Aws::Lambda::Errors::ResourceNotFoundException
    log "Function #{function_name} does not exist, creating."
    # Options defined at
    #   https://docs.aws.amazon.com/lambda/latest/dg/API_CreateFunction.html
    response = lambda.create_function({
                function_name:        options[:name]           || option(:function_name),
                description:          options[:description]    || default_description,
                timeout:              options[:timeout]        || default_timeout,
                memory_size:          options[:memory_size]    || default_memory_size,
                role:                 option(:role),
                handler:              handler,
                code: {
                 zip_file:           function_zip,
                },
                runtime:              options[:runtime]        || default_runtime,
                publish:              publish,
                vpc_config:           vpc_config,
                environment:          environment_variables,
                dead_letter_config:   dead_letter_arn,
                kms_key_arn:          options[:kms_key_arn] || default_kms_key_arn,
                tracing_config:       tracing_mode,
                tags:                 function_tags
              })

    log "Created lambda: #{response.function_name}."
  end
rescue ::Aws::Lambda::Errors::ServiceException => exception
  error(exception.message)
rescue ::Aws::Lambda::Errors::InvalidParameterValueException => exception
  error(exception.message)
rescue ::Aws::Lambda::Errors::ResourceNotFoundException => exception
  error(exception.message)
end

#random_chars(count = 8) ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 225

def random_chars(count=8)
  (36**(count-1) + rand(36**count - 36**(count-1))).to_s(36)
end

#split_string_array_to_hash(arr, delimiter = "=") ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 216

def split_string_array_to_hash(arr, delimiter="=")
  variables = {}
  Array(arr).map do |val|
    keyval = val.split(delimiter)
    variables[keyval[0]] = keyval[1]
  end
  variables
end

#tracing_mode ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 180

def tracing_mode
  options[:tracing_mode] ? { :mode => options[:tracing_mode]} : nil
end

#uncleanup ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 232

def uncleanup
end

#vpc_config ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 168

def vpc_config
  options[:subnet_ids] && options[:security_group_ids] ? { :subnet_ids => Array(options[:subnet_ids]), :security_group_ids => Array(options[:security_group_ids]) } : nil
end

#zip_directory(dest_file_path, target_directory_path) ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 141

def zip_directory(dest_file_path, target_directory_path)
  files = Dir[File.join(target_directory_path, '**', '**')]
  create_zip(dest_file_path, target_directory_path, files)
end

#zip_file(dest_file_path, target_file_path) ⇒ Object 



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# File 'lib/dpl/provider/lambda.rb', line 127

def zip_file(dest_file_path, target_file_path)
  if File.extname(target_file_path) == '.zip'
    # Just copy it to the destination right away, since it is already a zip.
    FileUtils.cp(target_file_path, dest_file_path)
    dest_file_path
  else
    # Zip up the file.
    src_directory_path = File.dirname(target_file_path)
    files = [ target_file_path ]

    create_zip(dest_file_path, src_directory_path, files)
  end
end