110 lines
3.7 KiB
Ruby
110 lines
3.7 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Gitlab
|
|
module Instrumentation
|
|
module RedisInterceptor
|
|
APDEX_EXCLUDE = %w[brpop blpop brpoplpush bzpopmin bzpopmax xread xreadgroup].freeze
|
|
|
|
def call(command)
|
|
instrument_call([command]) do
|
|
super
|
|
end
|
|
end
|
|
|
|
def call_pipeline(pipeline)
|
|
instrument_call(pipeline.commands) do
|
|
super
|
|
end
|
|
end
|
|
|
|
def write(command)
|
|
measure_write_size(command) if ::RequestStore.active?
|
|
super
|
|
end
|
|
|
|
def read
|
|
result = super
|
|
measure_read_size(result) if ::RequestStore.active?
|
|
result
|
|
end
|
|
|
|
private
|
|
|
|
def instrument_call(commands)
|
|
start = Gitlab::Metrics::System.monotonic_time # must come first so that 'start' is always defined
|
|
instrumentation_class.instance_count_request(commands.size)
|
|
|
|
if !instrumentation_class.redis_cluster_validate!(commands) && ::RequestStore.active?
|
|
instrumentation_class.increment_cross_slot_request_count
|
|
end
|
|
|
|
yield
|
|
rescue ::Redis::BaseError => ex
|
|
instrumentation_class.instance_count_exception(ex)
|
|
raise ex
|
|
ensure
|
|
duration = Gitlab::Metrics::System.monotonic_time - start
|
|
|
|
unless exclude_from_apdex?(commands)
|
|
commands.each { instrumentation_class.instance_observe_duration(duration / commands.size) }
|
|
end
|
|
|
|
if ::RequestStore.active?
|
|
# These metrics measure total Redis usage per Rails request / job.
|
|
instrumentation_class.increment_request_count(commands.size)
|
|
instrumentation_class.add_duration(duration)
|
|
instrumentation_class.add_call_details(duration, commands)
|
|
end
|
|
end
|
|
|
|
def measure_write_size(command)
|
|
size = 0
|
|
|
|
# Mimic what happens in
|
|
# https://github.com/redis/redis-rb/blob/f597f21a6b954b685cf939febbc638f6c803e3a7/lib/redis/connection/command_helper.rb#L8.
|
|
# This count is an approximation that omits the Redis protocol overhead
|
|
# of type prefixes, length prefixes and line endings.
|
|
command.each do |x|
|
|
size += if x.is_a? Array
|
|
x.inject(0) { |sum, y| sum + y.to_s.bytesize }
|
|
else
|
|
x.to_s.bytesize
|
|
end
|
|
end
|
|
|
|
instrumentation_class.increment_write_bytes(size)
|
|
end
|
|
|
|
def measure_read_size(result)
|
|
# The Connection::Ruby#read class can return one of four types of results from read:
|
|
# https://github.com/redis/redis-rb/blob/f597f21a6b954b685cf939febbc638f6c803e3a7/lib/redis/connection/ruby.rb#L406
|
|
#
|
|
# 1. Error (exception, will not reach this line)
|
|
# 2. Status (string)
|
|
# 3. Integer (will be converted to string by to_s.bytesize and thrown away)
|
|
# 4. "Binary" string (i.e. may contain zero byte)
|
|
# 5. Array of binary string
|
|
|
|
if result.is_a? Array
|
|
# Redis can return nested arrays, e.g. from XRANGE or GEOPOS, so we use recursion here.
|
|
result.each { |x| measure_read_size(x) }
|
|
else
|
|
# This count is an approximation that omits the Redis protocol overhead
|
|
# of type prefixes, length prefixes and line endings.
|
|
instrumentation_class.increment_read_bytes(result.to_s.bytesize)
|
|
end
|
|
end
|
|
|
|
# That's required so it knows which GitLab Redis instance
|
|
# it's interacting with in order to categorize accordingly.
|
|
#
|
|
def instrumentation_class
|
|
@options[:instrumentation_class] # rubocop:disable Gitlab/ModuleWithInstanceVariables
|
|
end
|
|
|
|
def exclude_from_apdex?(commands)
|
|
commands.any? { |command| APDEX_EXCLUDE.include?(command.first.to_s.downcase) }
|
|
end
|
|
end
|
|
end
|
|
end
|