diff options
Diffstat (limited to 'lib/gitlab/metrics/redis_rack_middleware.rb')
| -rw-r--r-- | lib/gitlab/metrics/redis_rack_middleware.rb | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/gitlab/metrics/redis_rack_middleware.rb b/lib/gitlab/metrics/redis_rack_middleware.rb new file mode 100644 index 00000000000..f0f99c5f45d --- /dev/null +++ b/lib/gitlab/metrics/redis_rack_middleware.rb @@ -0,0 +1,39 @@ +# frozen_string_literal: true + +module Gitlab + module Metrics + # Rack middleware for tracking Redis metrics from Grape and Web requests. + class RedisRackMiddleware + def initialize(app) + @app = app + + @requests_total_counter = Gitlab::Metrics.counter(:http_redis_requests_total, + 'Amount of calls to Redis servers during web requests', + Gitlab::Metrics::Transaction::BASE_LABELS) + @requests_duration_histogram = Gitlab::Metrics.histogram(:http_redis_requests_duration_seconds, + 'Query time for Redis servers during web requests', + Gitlab::Metrics::Transaction::BASE_LABELS, + Gitlab::Instrumentation::Redis::QUERY_TIME_BUCKETS) + end + + def call(env) + transaction = Gitlab::Metrics.current_transaction + + @app.call(env) + ensure + record_metrics(transaction) + end + + private + + def record_metrics(transaction) + labels = transaction.labels + query_time = Gitlab::Instrumentation::Redis.query_time + request_count = Gitlab::Instrumentation::Redis.get_request_count + + @requests_total_counter.increment(labels, request_count) + @requests_duration_histogram.observe(labels, query_time) + end + end + end +end |