40 lines
1.5 KiB
Ruby
40 lines
1.5 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 Redis metrics from Grape and Web requests.
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class RedisRackMiddleware
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def initialize(app)
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@app = app
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@requests_total_counter = Gitlab::Metrics.counter(:http_redis_requests_total,
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'Amount of calls to Redis servers during web requests',
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Gitlab::Metrics::Transaction::BASE_LABELS)
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@requests_duration_histogram = Gitlab::Metrics.histogram(:http_redis_requests_duration_seconds,
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'Query time for Redis servers during web requests',
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Gitlab::Metrics::Transaction::BASE_LABELS,
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Gitlab::Instrumentation::Redis::QUERY_TIME_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::Redis.query_time
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request_count = Gitlab::Instrumentation::Redis.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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