42 lines
1.6 KiB
Ruby
42 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Metrics
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# Rack middleware for tracking Elasticsearch metrics from Grape and Web requests.
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class ElasticsearchRackMiddleware
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HISTOGRAM_BUCKETS = [0.1, 0.25, 0.5, 1, 2.5, 5, 10, 60].freeze
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def initialize(app)
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@app = app
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@requests_total_counter = Gitlab::Metrics.counter(:http_elasticsearch_requests_total,
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'Amount of calls to Elasticsearch servers during web requests',
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Gitlab::Metrics::Transaction::BASE_LABELS)
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@requests_duration_histogram = Gitlab::Metrics.histogram(:http_elasticsearch_requests_duration_seconds,
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'Query time for Elasticsearch servers during web requests',
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Gitlab::Metrics::Transaction::BASE_LABELS,
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HISTOGRAM_BUCKETS)
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end
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def call(env)
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transaction = Gitlab::Metrics.current_transaction
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@app.call(env)
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ensure
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record_metrics(transaction)
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end
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private
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def record_metrics(transaction)
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labels = transaction.labels
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query_time = ::Gitlab::Instrumentation::ElasticsearchTransport.query_time
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request_count = ::Gitlab::Instrumentation::ElasticsearchTransport.get_request_count
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@requests_total_counter.increment(labels, request_count)
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@requests_duration_histogram.observe(labels, query_time)
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end
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end
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end
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end
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