66 lines
1.6 KiB
Ruby
66 lines
1.6 KiB
Ruby
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# frozen_string_literal: true
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module Gitlab
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module Ci
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class RunnerReleases
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include Singleton
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RELEASES_VALIDITY_PERIOD = 1.day
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RELEASES_VALIDITY_AFTER_ERROR_PERIOD = 5.seconds
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INITIAL_BACKOFF = 5.seconds
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MAX_BACKOFF = 1.hour
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BACKOFF_GROWTH_FACTOR = 2.0
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def initialize
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reset!
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end
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# Returns a sorted list of the publicly available GitLab Runner releases
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#
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def releases
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return @releases unless Time.now.utc >= @expire_time
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@releases = fetch_new_releases
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end
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def reset!
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@expire_time = Time.now.utc
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@releases = nil
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@backoff_count = 0
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end
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public_class_method :instance
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private
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def fetch_new_releases
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response = Gitlab::HTTP.try_get(::Gitlab::CurrentSettings.current_application_settings.public_runner_releases_url)
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releases = response.success? ? extract_releases(response) : nil
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ensure
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@expire_time = (releases ? RELEASES_VALIDITY_PERIOD : next_backoff).from_now
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end
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def extract_releases(response)
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response.parsed_response.map { |release| parse_runner_release(release) }.sort!
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end
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def parse_runner_release(release)
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::Gitlab::VersionInfo.parse(release['name'].delete_prefix('v'))
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end
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def next_backoff
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return MAX_BACKOFF if @backoff_count >= 11 # optimization to prevent expensive exponentiation and possible overflows
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backoff = (INITIAL_BACKOFF * (BACKOFF_GROWTH_FACTOR**@backoff_count))
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.clamp(INITIAL_BACKOFF, MAX_BACKOFF)
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.seconds
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@backoff_count += 1
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backoff
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end
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end
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end
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end
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