Class: Lono::Template::Upload

Inherits:
Object
  • Object
show all
Includes:
AwsServices, Blueprint::Root
Defined in:
lib/lono/template/upload.rb

Instance Method Summary collapse

Methods included from AwsServices

#cfn, #ec2, #iam, #s3, #s3_presigner, #s3_resource, #sts

Methods included from AwsServices::Util

#find_stack, #rollback_complete?, #stack_exists?, #testing_update?

Methods included from Blueprint::Root

#bundler_groups, #find_blueprint_root, #require_bundle_gems, #set_blueprint_root

Constructor Details

#initialize(blueprint, options = {}) ⇒ Upload

Returns a new instance of Upload.



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# File 'lib/lono/template/upload.rb', line 11

def initialize(blueprint, options={})
  @blueprint, @options = blueprint, options
  @template = @options[:template] || @blueprint
  Lono::ProjectChecker.check
  set_blueprint_root(@blueprint)

  @checksums = {}
  @prefix = Lono.env # s3://s3-bucket/development
end

Instance Method Details

#load_checksums! ⇒ Object

Read existing files on s3 to grab their md5 checksum. We do this so we can see if we should avoid re-uploading the s3 child template entirely. If we upload a new child template that does not change AWS CloudFormation is not smart enough to know that it not has changed. I think all AWS CloudFormation does is check if the file’s timestamp.

Thought this would result in better AWS Change Set info but AWS still reports child stacks being changed even though they should not be reported. Leaving this s3 checksum in for now.



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# File 'lib/lono/template/upload.rb', line 41

def load_checksums!
  return if @options[:noop]

  resp = s3.list_objects(bucket: s3_bucket, prefix: @prefix)
  resp.contents.each do |object|
    @checksums[object.key] = strip_surrounding_quotes(object.etag)
  end
  @checksums
end

#remote_checksum(path) ⇒ Object

path = ./output/templates/docker.yml s3_folder = s3://boltops-dev/s3_folder/templates/development/docker.yml



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# File 'lib/lono/template/upload.rb', line 89

def remote_checksum(path)
  # first convert the local path to the path format that is stored in @checksums keys
  # ./output/templates/docker.yml => s3_folder/templates/development/docker.yml
  pretty_path = path.sub(/^\.\//, '')
  key = "#{@prefix}/#{pretty_path.sub(%r{output/templates/},'')}"
  @checksums[key]
end

#run ⇒ Object 



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# File 'lib/lono/template/upload.rb', line 21

def run
  load_checksums!

  say "Uploading CloudFormation templates..."
  paths = Dir.glob("#{Lono.config.output_path}/#{@blueprint}/templates/**/*")
  paths.select { |p| File.file?(p) }.each do |path|
    upload(path)
  end
  say "Templates uploaded to s3."
end

#s3_bucket ⇒ Object

Parse the s3_folder setting and remove the folder portion to leave the “s3_bucket” portion Example:

s3_bucket('s3://mybucket/templates/storage/path')
=> mybucket



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# File 'lib/lono/template/upload.rb', line 114

def s3_bucket
  Lono::S3::Bucket.name
end

#s3_https_url(template_path) ⇒ Object

s3.amazonaws.com/mybucket/s3_folder/templates/production/parent.yml



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# File 'lib/lono/template/upload.rb', line 98

def s3_https_url(template_path)
  "https://s3.amazonaws.com/#{s3_bucket}/#{@prefix}/#{template_path}"
end

#s3_presigned_url(template_output_path) ⇒ Object

used for cfn/base.rb def set_template_body!(params)



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# File 'lib/lono/template/upload.rb', line 103

def s3_presigned_url(template_output_path)
  template_path = template_output_path.sub('output/templates/','')
  key = "#{@prefix}/#{template_path}"
  s3_presigner.presigned_url(:get_object, bucket: s3_bucket, key: key)
end

#say(message) ⇒ Object 



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# File 'lib/lono/template/upload.rb', line 118

def say(message)
  puts message unless @options[:quiet]
end

#strip_surrounding_quotes(string) ⇒ Object 



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# File 'lib/lono/template/upload.rb', line 51

def strip_surrounding_quotes(string)
  string.sub(/^"/,'').sub(/"$/,'')
end

#upload(path) ⇒ Object 



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# File 'lib/lono/template/upload.rb', line 55

def upload(path)
  return if @options[:noop]

  path = path.sub("#{Lono.root}/",'')
  pretty_path = path.sub(/^\.\//, '')
  key = "#{@prefix}/#{pretty_path.sub(%r{output/templates/},'')}"
  s3_full_path = "s3://#{s3_bucket}/#{key}"

  local_checksum = Digest::MD5.hexdigest(IO.read(path))
  remote_checksum = remote_checksum(path)
  if local_checksum == remote_checksum
    say("Not modified: #{pretty_path} to #{s3_full_path}".color(:yellow)) unless @options[:noop]
    return # do not upload unless the checksum has changed
  end

  resp = s3.put_object(
    body: IO.read(path),
    bucket: s3_bucket,
    key: key,
    storage_class: "REDUCED_REDUNDANCY"
  ) unless @options[:noop]

  # Example output:
  # Uploaded: output/templates/docker.yml to s3://boltops-dev/s3_folder/templates/development/docker.yml
  # Uploaded: output/templates/ecs/private.yml to s3://boltops-dev/s3_folder/templates/development/ecs/private.yml
  message = "Uploaded: #{pretty_path} to #{s3_full_path}".color(:green)
  message = "NOOP: #{message}" if @options[:noop]
  say message
end