2018-10-22 03:00:50 -04:00
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# frozen_string_literal: true
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2017-06-16 12:42:41 -04:00
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require 'base64'
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2017-02-05 13:04:23 -05:00
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require 'gitaly'
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2018-01-21 18:34:09 -05:00
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require 'grpc/health/v1/health_pb'
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require 'grpc/health/v1/health_services_pb'
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2017-02-05 13:04:23 -05:00
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module Gitlab
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module GitalyClient
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2018-01-29 06:33:08 -05:00
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include Gitlab::Metrics::Methods
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2017-05-31 17:06:01 -04:00
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2017-09-19 06:55:37 -04:00
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class TooManyInvocationsError < StandardError
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attr_reader :call_site, :invocation_count, :max_call_stack
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def initialize(call_site, invocation_count, max_call_stack, most_invoked_stack)
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@call_site = call_site
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@invocation_count = invocation_count
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@max_call_stack = max_call_stack
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stacks = most_invoked_stack.join('\n') if most_invoked_stack
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msg = "GitalyClient##{call_site} called #{invocation_count} times from single request. Potential n+1?"
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2018-10-22 03:00:50 -04:00
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msg = "#{msg}\nThe following call site called into Gitaly #{max_call_stack} times:\n#{stacks}\n" if stacks
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2017-09-19 06:55:37 -04:00
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super(msg)
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end
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end
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2018-12-19 05:36:06 -05:00
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PEM_REGEX = /\-+BEGIN CERTIFICATE\-+.+?\-+END CERTIFICATE\-+/m
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2018-11-20 07:29:56 -05:00
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SERVER_VERSION_FILE = 'GITALY_SERVER_VERSION'
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2019-02-22 09:51:27 -05:00
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MAXIMUM_GITALY_CALLS = 30
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2017-10-06 13:16:20 -04:00
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CLIENT_NAME = (Sidekiq.server? ? 'gitlab-sidekiq' : 'gitlab-web').freeze
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2017-03-13 10:04:46 -04:00
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2017-05-10 08:18:59 -04:00
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MUTEX = Mutex.new
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2017-03-30 10:26:30 -04:00
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2017-10-18 07:26:00 -04:00
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class << self
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2017-11-07 09:13:48 -05:00
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attr_accessor :query_time
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2017-10-18 07:26:00 -04:00
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end
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self.query_time = 0
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2017-11-07 09:13:48 -05:00
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2018-01-18 07:49:33 -05:00
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define_histogram :gitaly_controller_action_duration_seconds do
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docstring "Gitaly endpoint histogram by controller and action combination"
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base_labels Gitlab::Metrics::Transaction::BASE_LABELS.merge(gitaly_service: nil, rpc: nil)
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2017-11-07 09:13:48 -05:00
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end
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2017-10-18 07:26:00 -04:00
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2017-05-10 08:18:59 -04:00
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def self.stub(name, storage)
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MUTEX.synchronize do
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@stubs ||= {}
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@stubs[storage] ||= {}
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@stubs[storage][name] ||= begin
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2018-01-21 18:34:09 -05:00
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klass = stub_class(name)
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addr = stub_address(storage)
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2018-10-25 10:35:04 -04:00
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creds = stub_creds(storage)
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2019-01-07 05:40:54 -05:00
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klass.new(addr, creds, interceptors: interceptors)
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2017-03-30 10:26:30 -04:00
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end
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end
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2017-03-22 13:23:40 -04:00
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end
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2019-01-07 05:40:54 -05:00
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def self.interceptors
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return [] unless Gitlab::Tracing.enabled?
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[Gitlab::Tracing::GRPCInterceptor.instance]
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end
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private_class_method :interceptors
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2018-12-19 12:07:33 -05:00
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def self.stub_cert_paths
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2018-12-11 06:41:03 -05:00
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cert_paths = Dir["#{OpenSSL::X509::DEFAULT_CERT_DIR}/*"]
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cert_paths << OpenSSL::X509::DEFAULT_CERT_FILE if File.exist? OpenSSL::X509::DEFAULT_CERT_FILE
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2018-12-19 12:07:33 -05:00
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cert_paths
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end
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def self.stub_certs
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return @certs if @certs
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2018-12-11 06:41:03 -05:00
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2018-12-19 12:07:33 -05:00
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@certs = stub_cert_paths.flat_map do |cert_file|
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2018-12-19 05:36:06 -05:00
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File.read(cert_file).scan(PEM_REGEX).map do |cert|
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begin
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OpenSSL::X509::Certificate.new(cert).to_pem
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rescue OpenSSL::OpenSSLError => e
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Rails.logger.error "Could not load certificate #{cert_file} #{e}"
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2018-12-19 12:07:33 -05:00
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Gitlab::Sentry.track_exception(e, extra: { cert_file: cert_file })
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2018-12-19 05:36:06 -05:00
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nil
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2018-12-17 06:19:13 -05:00
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end
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2018-12-19 05:36:06 -05:00
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end.compact
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end.uniq.join("\n")
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2018-11-19 06:57:48 -05:00
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end
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2018-10-25 10:35:04 -04:00
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def self.stub_creds(storage)
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if URI(address(storage)).scheme == 'tls'
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2018-12-19 05:36:06 -05:00
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GRPC::Core::ChannelCredentials.new stub_certs
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2018-10-25 10:35:04 -04:00
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else
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:this_channel_is_insecure
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end
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end
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2018-01-21 18:34:09 -05:00
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def self.stub_class(name)
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if name == :health_check
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Grpc::Health::V1::Health::Stub
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else
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Gitaly.const_get(name.to_s.camelcase.to_sym).const_get(:Stub)
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end
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end
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def self.stub_address(storage)
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2018-12-19 05:36:06 -05:00
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address(storage).sub(%r{^tcp://|^tls://}, '')
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2018-01-21 18:34:09 -05:00
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end
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2017-05-10 08:18:59 -04:00
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def self.clear_stubs!
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MUTEX.synchronize do
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@stubs = nil
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end
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2017-02-05 13:04:23 -05:00
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end
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2018-03-27 05:48:11 -04:00
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def self.random_storage
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Gitlab.config.repositories.storages.keys.sample
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end
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2017-05-10 08:18:59 -04:00
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def self.address(storage)
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params = Gitlab.config.repositories.storages[storage]
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raise "storage not found: #{storage.inspect}" if params.nil?
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2017-03-30 10:26:30 -04:00
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2017-05-10 08:18:59 -04:00
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address = params['gitaly_address']
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unless address.present?
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raise "storage #{storage.inspect} is missing a gitaly_address"
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end
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2017-03-24 13:22:42 -04:00
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2018-10-25 10:35:04 -04:00
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unless URI(address).scheme.in?(%w(tcp unix tls))
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raise "Unsupported Gitaly address: #{address.inspect} does not use URL scheme 'tcp' or 'unix' or 'tls'"
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2017-03-30 10:26:30 -04:00
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end
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2017-05-10 08:18:59 -04:00
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address
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2017-02-05 13:04:23 -05:00
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end
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2017-11-22 05:19:42 -05:00
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def self.address_metadata(storage)
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2019-01-25 07:10:04 -05:00
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Base64.strict_encode64(JSON.dump(storage => connection_data(storage)))
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end
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def self.connection_data(storage)
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{ 'address' => address(storage), 'token' => token(storage) }
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2017-11-22 05:19:42 -05:00
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end
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2017-06-20 11:31:49 -04:00
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# All Gitaly RPC call sites should use GitalyClient.call. This method
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# makes sure that per-request authentication headers are set.
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2017-10-16 05:21:42 -04:00
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#
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# This method optionally takes a block which receives the keyword
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# arguments hash 'kwargs' that will be passed to gRPC. This allows the
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# caller to modify or augment the keyword arguments. The block must
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# return a hash.
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#
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# For example:
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#
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# GitalyClient.call(storage, service, rpc, request) do |kwargs|
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# kwargs.merge(deadline: Time.now + 10)
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# end
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#
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2017-11-29 04:12:12 -05:00
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def self.call(storage, service, rpc, request, remote_storage: nil, timeout: nil)
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2017-11-07 09:13:48 -05:00
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start = Gitlab::Metrics::System.monotonic_time
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2018-03-08 07:10:59 -05:00
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request_hash = request.is_a?(Google::Protobuf::MessageExts) ? request.to_h : {}
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2018-03-06 09:02:18 -05:00
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2017-09-19 06:55:37 -04:00
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enforce_gitaly_request_limits(:call)
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2017-11-29 04:12:12 -05:00
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kwargs = request_kwargs(storage, timeout, remote_storage: remote_storage)
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2017-10-16 05:21:42 -04:00
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kwargs = yield(kwargs) if block_given?
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2017-11-22 05:19:42 -05:00
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2017-10-16 05:21:42 -04:00
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stub(service, storage).__send__(rpc, request, kwargs) # rubocop:disable GitlabSecurity/PublicSend
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2017-10-18 07:26:00 -04:00
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ensure
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2017-11-07 09:13:48 -05:00
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duration = Gitlab::Metrics::System.monotonic_time - start
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2018-11-15 05:13:50 -05:00
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# Keep track, separately, for the performance bar
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2017-11-07 09:13:48 -05:00
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self.query_time += duration
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2018-01-18 07:49:33 -05:00
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gitaly_controller_action_duration_seconds.observe(
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2017-11-07 09:13:48 -05:00
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current_transaction_labels.merge(gitaly_service: service.to_s, rpc: rpc.to_s),
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duration)
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2018-03-08 07:10:59 -05:00
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2018-11-20 07:29:56 -05:00
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add_call_details(feature: "#{service}##{rpc}", duration: duration, request: request_hash, rpc: rpc)
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2017-11-07 09:13:48 -05:00
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end
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def self.current_transaction_labels
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Gitlab::Metrics::Transaction.current&.labels || {}
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2017-06-16 12:42:41 -04:00
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end
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2017-11-07 09:13:48 -05:00
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private_class_method :current_transaction_labels
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2017-07-21 03:36:31 -04:00
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2018-08-29 15:53:44 -04:00
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# For some time related tasks we can't rely on `Time.now` since it will be
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# affected by Timecop in some tests, and the clock of some gitaly-related
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# components (grpc's c-core and gitaly server) use system time instead of
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# timecop's time, so tests will fail.
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# `Time.at(Process.clock_gettime(Process::CLOCK_REALTIME))` will circumvent
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# timecop.
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def self.real_time
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Time.at(Process.clock_gettime(Process::CLOCK_REALTIME))
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end
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private_class_method :real_time
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def self.authorization_token(storage)
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token = token(storage).to_s
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issued_at = real_time.to_i.to_s
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hmac = OpenSSL::HMAC.hexdigest(OpenSSL::Digest::SHA256.new, token, issued_at)
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"v2.#{hmac}.#{issued_at}"
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end
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private_class_method :authorization_token
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2017-11-29 04:12:12 -05:00
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def self.request_kwargs(storage, timeout, remote_storage: nil)
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2017-10-06 13:16:20 -04:00
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metadata = {
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2018-08-29 15:53:44 -04:00
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'authorization' => "Bearer #{authorization_token(storage)}",
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2017-10-06 13:16:20 -04:00
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'client_name' => CLIENT_NAME
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}
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feature_stack = Thread.current[:gitaly_feature_stack]
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feature = feature_stack && feature_stack[0]
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metadata['call_site'] = feature.to_s if feature
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2017-11-22 05:19:42 -05:00
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metadata['gitaly-servers'] = address_metadata(remote_storage) if remote_storage
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2018-12-07 16:57:56 -05:00
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metadata['x-gitlab-correlation-id'] = Gitlab::CorrelationId.current_id if Gitlab::CorrelationId.current_id
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2017-10-06 13:16:20 -04:00
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2018-06-01 05:37:03 -04:00
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metadata.merge!(server_feature_flags)
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2018-05-16 04:20:14 -04:00
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2017-11-29 04:12:12 -05:00
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result = { metadata: metadata }
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# nil timeout indicates that we should use the default
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timeout = default_timeout if timeout.nil?
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return result unless timeout > 0
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2018-08-29 15:53:44 -04:00
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deadline = real_time + timeout
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2017-11-29 04:12:12 -05:00
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result[:deadline] = deadline
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result
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2017-06-16 12:42:41 -04:00
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end
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2018-11-20 07:29:56 -05:00
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SERVER_FEATURE_FLAGS = %w[].freeze
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2018-05-16 04:20:14 -04:00
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2018-06-01 05:37:03 -04:00
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def self.server_feature_flags
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SERVER_FEATURE_FLAGS.map do |f|
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["gitaly-feature-#{f.tr('_', '-')}", feature_enabled?(f).to_s]
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end.to_h
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2018-05-16 04:20:14 -04:00
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end
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2017-06-16 12:42:41 -04:00
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def self.token(storage)
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params = Gitlab.config.repositories.storages[storage]
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raise "storage not found: #{storage.inspect}" if params.nil?
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params['gitaly_token'].presence || Gitlab.config.gitaly['token']
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end
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2018-11-20 07:29:56 -05:00
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def self.feature_enabled?(feature_name)
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Feature.enabled?("gitaly_#{feature_name}")
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2017-09-19 06:55:37 -04:00
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end
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# Ensures that Gitaly is not being abuse through n+1 misuse etc
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def self.enforce_gitaly_request_limits(call_site)
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# Only count limits in request-response environments (not sidekiq for example)
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2018-09-20 18:40:15 -04:00
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return unless Gitlab::SafeRequestStore.active?
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2017-09-19 06:55:37 -04:00
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# This is this actual number of times this call was made. Used for information purposes only
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actual_call_count = increment_call_count("gitaly_#{call_site}_actual")
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# Do no enforce limits in production
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2017-09-30 12:26:23 -04:00
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return if Rails.env.production? || ENV["GITALY_DISABLE_REQUEST_LIMITS"]
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2017-09-19 06:55:37 -04:00
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# Check if this call is nested within a allow_n_plus_1_calls
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# block and skip check if it is
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return if get_call_count(:gitaly_call_count_exception_block_depth) > 0
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# This is the count of calls outside of a `allow_n_plus_1_calls` block
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# It is used for enforcement but not statistics
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permitted_call_count = increment_call_count("gitaly_#{call_site}_permitted")
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count_stack
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return if permitted_call_count <= MAXIMUM_GITALY_CALLS
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raise TooManyInvocationsError.new(call_site, actual_call_count, max_call_count, max_stacks)
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end
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def self.allow_n_plus_1_calls
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2018-09-20 18:40:15 -04:00
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return yield unless Gitlab::SafeRequestStore.active?
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2017-09-19 06:55:37 -04:00
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begin
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increment_call_count(:gitaly_call_count_exception_block_depth)
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yield
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ensure
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decrement_call_count(:gitaly_call_count_exception_block_depth)
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end
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end
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def self.get_call_count(key)
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2018-09-20 18:40:15 -04:00
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Gitlab::SafeRequestStore[key] || 0
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2017-09-19 06:55:37 -04:00
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end
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private_class_method :get_call_count
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def self.increment_call_count(key)
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2018-09-20 18:40:15 -04:00
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Gitlab::SafeRequestStore[key] ||= 0
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Gitlab::SafeRequestStore[key] += 1
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2017-09-19 06:55:37 -04:00
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end
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private_class_method :increment_call_count
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def self.decrement_call_count(key)
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2018-09-20 18:40:15 -04:00
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Gitlab::SafeRequestStore[key] -= 1
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2017-09-19 06:55:37 -04:00
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end
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private_class_method :decrement_call_count
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2018-11-20 07:29:56 -05:00
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# Returns the of the number of Gitaly calls made for this request
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2017-09-19 06:55:37 -04:00
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def self.get_request_count
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2018-11-20 07:29:56 -05:00
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get_call_count("gitaly_call_actual")
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2017-09-19 06:55:37 -04:00
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end
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def self.reset_counts
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2018-09-20 18:40:15 -04:00
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return unless Gitlab::SafeRequestStore.active?
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2017-09-19 06:55:37 -04:00
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2018-11-20 07:29:56 -05:00
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Gitlab::SafeRequestStore["gitaly_call_actual"] = 0
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Gitlab::SafeRequestStore["gitaly_call_permitted"] = 0
|
2017-02-24 10:53:44 -05:00
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end
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2017-03-13 10:04:46 -04:00
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2018-03-06 09:02:18 -05:00
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def self.add_call_details(details)
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2018-11-20 07:29:56 -05:00
|
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return unless Gitlab::SafeRequestStore[:peek_enabled]
|
2018-03-06 09:02:18 -05:00
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|
2018-11-20 07:40:45 -05:00
|
|
|
Gitlab::SafeRequestStore['gitaly_call_details'] ||= []
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|
|
Gitlab::SafeRequestStore['gitaly_call_details'] << details
|
2018-03-06 09:02:18 -05:00
|
|
|
end
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|
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|
2018-03-08 07:10:59 -05:00
|
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|
def self.list_call_details
|
2018-11-20 07:40:45 -05:00
|
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|
return [] unless Gitlab::SafeRequestStore[:peek_enabled]
|
2018-03-06 09:02:18 -05:00
|
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|
|
2018-11-20 07:40:45 -05:00
|
|
|
Gitlab::SafeRequestStore['gitaly_call_details'] || []
|
2018-03-06 09:02:18 -05:00
|
|
|
end
|
|
|
|
|
2017-03-13 10:04:46 -04:00
|
|
|
def self.expected_server_version
|
|
|
|
path = Rails.root.join(SERVER_VERSION_FILE)
|
|
|
|
path.read.chomp
|
|
|
|
end
|
2017-07-25 17:33:06 -04:00
|
|
|
|
2018-07-04 10:02:01 -04:00
|
|
|
def self.timestamp(time)
|
|
|
|
Google::Protobuf::Timestamp.new(seconds: time.to_i)
|
2017-09-11 04:17:49 -04:00
|
|
|
end
|
|
|
|
|
2017-11-29 04:12:12 -05:00
|
|
|
# The default timeout on all Gitaly calls
|
|
|
|
def self.default_timeout
|
2018-07-24 07:40:35 -04:00
|
|
|
return no_timeout if Sidekiq.server?
|
2017-11-29 04:12:12 -05:00
|
|
|
|
|
|
|
timeout(:gitaly_timeout_default)
|
|
|
|
end
|
|
|
|
|
|
|
|
def self.fast_timeout
|
|
|
|
timeout(:gitaly_timeout_fast)
|
|
|
|
end
|
|
|
|
|
|
|
|
def self.medium_timeout
|
|
|
|
timeout(:gitaly_timeout_medium)
|
|
|
|
end
|
|
|
|
|
2018-07-24 07:40:35 -04:00
|
|
|
def self.no_timeout
|
|
|
|
0
|
|
|
|
end
|
|
|
|
|
2017-11-29 04:12:12 -05:00
|
|
|
def self.timeout(timeout_name)
|
|
|
|
Gitlab::CurrentSettings.current_application_settings[timeout_name]
|
|
|
|
end
|
|
|
|
private_class_method :timeout
|
|
|
|
|
2017-09-19 06:55:37 -04:00
|
|
|
# Count a stack. Used for n+1 detection
|
|
|
|
def self.count_stack
|
2018-09-20 18:40:15 -04:00
|
|
|
return unless Gitlab::SafeRequestStore.active?
|
2017-09-19 06:55:37 -04:00
|
|
|
|
2018-07-04 11:11:47 -04:00
|
|
|
stack_string = Gitlab::Profiler.clean_backtrace(caller).drop(1).join("\n")
|
2017-09-19 06:55:37 -04:00
|
|
|
|
2018-09-20 18:40:15 -04:00
|
|
|
Gitlab::SafeRequestStore[:stack_counter] ||= Hash.new
|
2017-09-19 06:55:37 -04:00
|
|
|
|
2018-09-20 18:40:15 -04:00
|
|
|
count = Gitlab::SafeRequestStore[:stack_counter][stack_string] || 0
|
|
|
|
Gitlab::SafeRequestStore[:stack_counter][stack_string] = count + 1
|
2017-09-19 06:55:37 -04:00
|
|
|
end
|
|
|
|
private_class_method :count_stack
|
|
|
|
|
|
|
|
# Returns a count for the stack which called Gitaly the most times. Used for n+1 detection
|
|
|
|
def self.max_call_count
|
2018-09-20 18:40:15 -04:00
|
|
|
return 0 unless Gitlab::SafeRequestStore.active?
|
2017-09-19 06:55:37 -04:00
|
|
|
|
2018-09-20 18:40:15 -04:00
|
|
|
stack_counter = Gitlab::SafeRequestStore[:stack_counter]
|
2017-09-19 06:55:37 -04:00
|
|
|
return 0 unless stack_counter
|
|
|
|
|
|
|
|
stack_counter.values.max
|
|
|
|
end
|
|
|
|
private_class_method :max_call_count
|
|
|
|
|
|
|
|
# Returns the stacks that calls Gitaly the most times. Used for n+1 detection
|
|
|
|
def self.max_stacks
|
2018-09-20 18:40:15 -04:00
|
|
|
return nil unless Gitlab::SafeRequestStore.active?
|
2017-09-19 06:55:37 -04:00
|
|
|
|
2018-09-20 18:40:15 -04:00
|
|
|
stack_counter = Gitlab::SafeRequestStore[:stack_counter]
|
2017-09-19 06:55:37 -04:00
|
|
|
return nil unless stack_counter
|
|
|
|
|
|
|
|
max = max_call_count
|
|
|
|
return nil if max.zero?
|
|
|
|
|
|
|
|
stack_counter.select { |_, v| v == max }.keys
|
|
|
|
end
|
|
|
|
private_class_method :max_stacks
|
2017-02-05 13:04:23 -05:00
|
|
|
end
|
|
|
|
end
|