1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
# frozen_string_literal: true
module Gitlab
module Metrics
module Exporter
class MetricsMiddleware
def initialize(app, pid)
@app = app
default_labels = {
pid: pid
}
@requests_total = Gitlab::Metrics.counter(
:exporter_http_requests_total, 'Total number of HTTP requests', default_labels
)
@request_durations = Gitlab::Metrics.histogram(
:exporter_http_request_duration_seconds,
'HTTP request duration histogram (seconds)',
default_labels,
[0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10]
)
end
def call(env)
start = Gitlab::Metrics::System.monotonic_time
@app.call(env).tap do |response|
duration = Gitlab::Metrics::System.monotonic_time - start
labels = {
method: env['REQUEST_METHOD'].downcase,
path: env['PATH_INFO'].to_s,
code: response.first.to_s
}
@requests_total.increment(labels)
@request_durations.observe(labels, duration)
end
end
end
end
end
end
|
