157 lines
4.2 KiB
Ruby
157 lines
4.2 KiB
Ruby
# frozen_string_literal: true
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# This file should only be used by sub-classes, not directly by any clients of the sub-classes
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# please require all dependencies below:
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require 'active_support/core_ext/hash/keys'
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require 'active_support/core_ext/module/delegation'
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module Gitlab
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module Redis
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class Wrapper
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DEFAULT_REDIS_URL = 'redis://localhost:6379'
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REDIS_CONFIG_ENV_VAR_NAME = 'GITLAB_REDIS_CONFIG_FILE'
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class << self
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delegate :params, :url, to: :new
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def with
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pool.with { |redis| yield redis }
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end
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def version
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with { |redis| redis.info['redis_version'] }
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end
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def pool
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@pool ||= ConnectionPool.new(size: pool_size) { ::Redis.new(params) }
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end
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def pool_size
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# heuristic constant 5 should be a config setting somewhere -- related to CPU count?
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size = 5
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if Gitlab::Runtime.multi_threaded?
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size += Gitlab::Runtime.max_threads
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end
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size
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end
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def _raw_config
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return @_raw_config if defined?(@_raw_config)
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@_raw_config =
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begin
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if filename = config_file_name
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ERB.new(File.read(filename)).result.freeze
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else
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false
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end
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rescue Errno::ENOENT
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false
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end
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end
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def default_url
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DEFAULT_REDIS_URL
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end
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# Return the absolute path to a Rails configuration file
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#
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# We use this instead of `Rails.root` because for certain tasks
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# utilizing these classes, `Rails` might not be available.
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def config_file_path(filename)
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File.expand_path("../../../config/#{filename}", __dir__)
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end
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def config_file_name
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# if ENV set for wrapper class, use it even if it points to a file does not exist
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file_name = ENV[REDIS_CONFIG_ENV_VAR_NAME]
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return file_name unless file_name.nil?
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# otherwise, if config files exists for wrapper class, use it
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file_name = config_file_path('resque.yml')
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return file_name if File.file?(file_name)
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# nil will force use of DEFAULT_REDIS_URL when config file is absent
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nil
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end
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def instrumentation_class
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raise NotImplementedError
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end
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end
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def initialize(rails_env = nil)
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@rails_env = rails_env || ::Rails.env
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end
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def params
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redis_store_options
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end
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def url
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raw_config_hash[:url]
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end
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def sentinels
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raw_config_hash[:sentinels]
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end
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def sentinels?
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sentinels && !sentinels.empty?
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end
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private
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def redis_store_options
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config = raw_config_hash
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redis_url = config.delete(:url)
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redis_uri = URI.parse(redis_url)
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config[:instrumentation_class] ||= self.class.instrumentation_class
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if redis_uri.scheme == 'unix'
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# Redis::Store does not handle Unix sockets well, so let's do it for them
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config[:path] = redis_uri.path
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query = redis_uri.query
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unless query.nil?
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queries = CGI.parse(redis_uri.query)
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db_numbers = queries["db"] if queries.key?("db")
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config[:db] = db_numbers[0].to_i if db_numbers.any?
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end
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config
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else
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redis_hash = ::Redis::Store::Factory.extract_host_options_from_uri(redis_url)
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# order is important here, sentinels must be after the connection keys.
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# {url: ..., port: ..., sentinels: [...]}
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redis_hash.merge(config)
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end
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end
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def raw_config_hash
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config_data = fetch_config
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if config_data
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config_data.is_a?(String) ? { url: config_data } : config_data.deep_symbolize_keys
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else
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{ url: self.class.default_url }
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end
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end
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def fetch_config
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return false unless self.class._raw_config
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yaml = YAML.load(self.class._raw_config)
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# If the file has content but it's invalid YAML, `load` returns false
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if yaml
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yaml.fetch(@rails_env, false)
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else
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false
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end
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end
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end
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end
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end
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