Class: BoringBackup::Stores::S3

Inherits:
Store
  • Object
show all
Defined in:
lib/boring_backup/stores/s3.rb

Constant Summary collapse

DEFAULT_STORAGE_CLASS = 
:standard_ia
STORAGE_CLASSES = 
%i[
  standard
  standard_ia
  onezone_ia
  intelligent_tiering
  glacier_ir
  glacier
  deep_archive
  reduced_redundancy
  express_onezone
  outposts
  snow
].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ S3

Returns a new instance of S3.



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# File 'lib/boring_backup/stores/s3.rb', line 24

def initialize
  @bucket = ENV["AWS_S3_BUCKET"]
  @region = ENV["AWS_REGION"]
  @access_key_id = ENV["AWS_ACCESS_KEY_ID"]
  @secret_access_key = ENV["AWS_SECRET_ACCESS_KEY"]
  @part_size = ENV.fetch("BB_S3_PART_SIZE", 8 * 1024 * 1024).to_i
  @thread_count = ENV.fetch("BB_S3_THREAD_COUNT", 2).to_i
  @storage_class = ENV.fetch("BB_S3_STORAGE_CLASS", DEFAULT_STORAGE_CLASS)
end

Instance Attribute Details

#access_key_id ⇒ Object

Returns the value of attribute access_key_id.



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# File 'lib/boring_backup/stores/s3.rb', line 21

def access_key_id
  @access_key_id
end

#bucket ⇒ Object

Returns the value of attribute bucket.



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# File 'lib/boring_backup/stores/s3.rb', line 21

def bucket
  @bucket
end

#part_size ⇒ Object

Returns the value of attribute part_size.



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# File 'lib/boring_backup/stores/s3.rb', line 21

def part_size
  @part_size
end

#region ⇒ Object

Returns the value of attribute region.



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# File 'lib/boring_backup/stores/s3.rb', line 21

def region
  @region
end

#secret_access_key ⇒ Object

Returns the value of attribute secret_access_key.



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# File 'lib/boring_backup/stores/s3.rb', line 21

def secret_access_key
  @secret_access_key
end

#storage_class ⇒ Object 



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# File 'lib/boring_backup/stores/s3.rb', line 34

def storage_class
  value = @storage_class.to_s.strip.downcase

  value.empty? ? nil : value.to_sym
end

#thread_count ⇒ Object

Returns the value of attribute thread_count.



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# File 'lib/boring_backup/stores/s3.rb', line 21

def thread_count
  @thread_count
end

Instance Method Details

#backup!(key, stream) ⇒ Object

Prefer Aws::S3::TransferManager for streaming uploads if available. Aws::S3::Resource.upload_stream is deprecated in newer versions



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# File 'lib/boring_backup/stores/s3.rb', line 42

def backup!(key, stream)
  started = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  bytes = 0

  validate!

  upload_attempted = true

  if defined?(Aws::S3::TransferManager)
    manager = Aws::S3::TransferManager.new(client: s3_client)

    manager.upload_stream(bucket:, key: key, **upload_options) do |s3_stream|
      bytes = IO.copy_stream(stream, s3_stream)
    end
  else
    object = Aws::S3::Resource.new(client: s3_client).bucket(bucket).object(key)

    object.upload_stream(**upload_options) do |s3_stream|
      bytes = IO.copy_stream(stream, s3_stream)
    end
  end

  duration = Process.clock_gettime(Process::CLOCK_MONOTONIC) - started

  if config.min_size && bytes < config.min_size.to_i
    raise BoringBackup::DumpTooSmallError, "backup too small: #{BoringBackup.utils.human_size(bytes)} < min_size (#{BoringBackup.utils.human_size(config.min_size)})"
  end

  Result.new(success: true, store: :s3, bytes:, key:, duration:)
rescue => e
  duration = Process.clock_gettime(Process::CLOCK_MONOTONIC) - started

  cleanup!(key) if upload_attempted

  Result.new(success: false, error: e, store: :s3, bytes:, key:, duration:)
end

#cleanup!(key) ⇒ Object 



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# File 'lib/boring_backup/stores/s3.rb', line 93

def cleanup!(key)
  s3_client.delete_object(bucket:, key:)
rescue => e
  warn "Failed to clean up partial upload #{key}: #{e.message}"
end

#validate! ⇒ Object

Raises:



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# File 'lib/boring_backup/stores/s3.rb', line 79

def validate!
  raise BoringBackup::ConfigurationError, "bucket is not configured" if bucket.to_s.empty?

  if access_key_id.to_s.empty? != secret_access_key.to_s.empty?
    raise BoringBackup::ConfigurationError,
      "access_key_id and secret_access_key must both be set, or both left blank to use the default AWS credential chain"
  end

  if storage_class && !STORAGE_CLASSES.include?(storage_class)
    raise BoringBackup::ConfigurationError,
      "unknown storage class: #{storage_class.inspect} (expected one of: #{STORAGE_CLASSES.map(&:inspect).join(", ")}, or nil to use the bucket default)"
  end
end