40 lines
1.6 KiB
Ruby
40 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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# Patch to address https://gitlab.com/gitlab-com/gl-infra/scalability/-/issues/2212#note_1287996694
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# It uses hostname instead of IP address if the former is present in `CLUSTER NODES` output.
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if Gem::Version.new(Redis::VERSION) > Gem::Version.new('4.8.1')
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raise 'New version of redis detected, please remove or update this patch'
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end
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module Gitlab
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module Patch
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module NodeLoader
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def self.prepended(base)
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base.class_eval do
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# monkey-patches https://github.com/redis/redis-rb/blob/v4.8.0/lib/redis/cluster/node_loader.rb#L23
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def self.fetch_node_info(node)
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node.call(%i[cluster nodes]).split("\n").map(&:split).to_h do |arr|
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[
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extract_host_identifier(arr[1]),
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(arr[2].split(',') & %w[master slave]).first # rubocop:disable Naming/InclusiveLanguage
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]
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end
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end
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# Since `CLUSTER SLOT` uses the preferred endpoint determined by
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# the `cluster-preferred-endpoint-type` config value, we will prefer hostname over IP address.
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# See https://redis.io/commands/cluster-nodes/ for details on the output format.
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#
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# @param [String] Address info matching fhe format: <ip:port@cport[,hostname[,auxiliary_field=value]*]>
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def self.extract_host_identifier(node_address)
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ip_chunk, hostname, _auxiliaries = node_address.split(',')
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return ip_chunk.split('@').first if hostname.blank?
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port = ip_chunk.split('@').first.split(':')[1]
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"#{hostname}:#{port}"
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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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end
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