94 lines
2.3 KiB
Ruby
94 lines
2.3 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Metrics
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module Exporter
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class BaseExporter < Daemon
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attr_reader :server
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attr_accessor :readiness_checks
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def enabled?
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settings.enabled
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end
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def settings
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raise NotImplementedError
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end
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def log_filename
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raise NotImplementedError
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end
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private
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def start_working
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logger = WEBrick::Log.new(log_filename)
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logger.time_format = "[%Y-%m-%dT%H:%M:%S.%L%z]"
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access_log = [
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[logger, WEBrick::AccessLog::COMBINED_LOG_FORMAT]
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]
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@server = ::WEBrick::HTTPServer.new(
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Port: settings.port, BindAddress: settings.address,
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Logger: logger, AccessLog: access_log)
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server.mount_proc '/readiness' do |req, res|
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render_probe(readiness_probe, req, res)
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end
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server.mount_proc '/liveness' do |req, res|
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render_probe(liveness_probe, req, res)
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end
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server.mount '/', Rack::Handler::WEBrick, rack_app
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true
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end
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def run_thread
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server&.start
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rescue IOError
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# ignore forcibily closed servers
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end
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def stop_working
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if server
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# we close sockets if thread is not longer running
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# this happens, when the process forks
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if thread.alive?
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server.shutdown
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else
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server.listeners.each(&:close)
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end
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end
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@server = nil
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end
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def rack_app
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Rack::Builder.app do
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use Rack::Deflater
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use ::Prometheus::Client::Rack::Exporter if ::Gitlab::Metrics.metrics_folder_present?
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run -> (env) { [404, {}, ['']] }
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end
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end
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def readiness_probe
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::Gitlab::HealthChecks::Probes::Collection.new(*readiness_checks)
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end
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def liveness_probe
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::Gitlab::HealthChecks::Probes::Collection.new
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end
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def render_probe(probe, req, res)
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result = probe.execute
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res.status = result.http_status
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res.content_type = 'application/json; charset=utf-8'
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res.body = result.json.to_json
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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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