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
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Metrics::RequestsRackMiddleware, :aggregate_failures do
let(:app) { double('app') }
subject { described_class.new(app) }
around do |example|
# Simulate application context middleware
# In fact, this middleware cleans up the contexts after a request lifecycle
::Gitlab::ApplicationContext.with_context({}) do
example.run
end
end
describe '#call' do
let(:status) { 200 }
let(:env) { { 'REQUEST_METHOD' => 'GET' } }
let(:stack_result) { [status, {}, 'body'] }
before do
allow(app).to receive(:call).and_return(stack_result)
end
context '@app.call succeeds with 200' do
before do
allow(app).to receive(:call).and_return([200, nil, nil])
end
RSpec::Matchers.define :a_positive_execution_time do
match { |actual| actual > 0 }
end
it 'tracks request count and duration' do
expect(described_class).to receive_message_chain(:http_requests_total, :increment).with(method: 'get', status: '200', feature_category: 'unknown')
expect(described_class).to receive_message_chain(:http_request_duration_seconds, :observe).with({ method: 'get' }, a_positive_execution_time)
subject.call(env)
end
context 'request is a health check endpoint' do
['/-/liveness', '/-/liveness/', '/-/%6D%65%74%72%69%63%73'].each do |path|
context "when path is #{path}" do
before do
env['PATH_INFO'] = path
end
it 'increments health endpoint counter rather than overall counter and does not record duration' do
expect(described_class).not_to receive(:http_request_duration_seconds)
expect(described_class).not_to receive(:http_requests_total)
expect(described_class).to receive_message_chain(:http_health_requests_total, :increment).with(method: 'get', status: '200')
subject.call(env)
end
end
end
end
context 'request is not a health check endpoint' do
['/-/ordinary-requests', '/-/', '/-/health/subpath'].each do |path|
context "when path is #{path}" do
before do
env['PATH_INFO'] = path
end
it 'increments regular counters and tracks duration' do
expect(described_class).to receive_message_chain(:http_requests_total, :increment).with(method: 'get', status: '200', feature_category: 'unknown')
expect(described_class).not_to receive(:http_health_requests_total)
expect(described_class)
.to receive_message_chain(:http_request_duration_seconds, :observe)
.with({ method: 'get' }, a_positive_execution_time)
subject.call(env)
end
end
end
end
end
context '@app.call returns an error code' do
let(:status) { '500' }
it 'tracks count but not duration' do
expect(described_class).to receive_message_chain(:http_requests_total, :increment).with(method: 'get', status: '500', feature_category: 'unknown')
expect(described_class).not_to receive(:http_request_duration_seconds)
subject.call(env)
end
end
context '@app.call throws exception' do
let(:http_request_duration_seconds) { double('http_request_duration_seconds') }
let(:http_requests_total) { double('http_requests_total') }
before do
allow(app).to receive(:call).and_raise(StandardError)
allow(described_class).to receive(:http_request_duration_seconds).and_return(http_request_duration_seconds)
allow(described_class).to receive(:http_requests_total).and_return(http_requests_total)
end
it 'tracks the correct metrics' do
expect(described_class).to receive_message_chain(:rack_uncaught_errors_count, :increment)
expect(described_class).to receive_message_chain(:http_requests_total, :increment).with(method: 'get', status: 'undefined', feature_category: 'unknown')
expect(described_class.http_request_duration_seconds).not_to receive(:observe)
expect { subject.call(env) }.to raise_error(StandardError)
end
end
context 'feature category header' do
context 'when a feature category context is present' do
before do
::Gitlab::ApplicationContext.push(feature_category: 'issue_tracking')
end
it 'adds the feature category to the labels for http_requests_total' do
expect(described_class).to receive_message_chain(:http_requests_total, :increment).with(method: 'get', status: '200', feature_category: 'issue_tracking')
expect(described_class).not_to receive(:http_health_requests_total)
subject.call(env)
end
it 'does not record a feature category for health check endpoints' do
env['PATH_INFO'] = '/-/liveness'
expect(described_class).to receive_message_chain(:http_health_requests_total, :increment).with(method: 'get', status: '200')
expect(described_class).not_to receive(:http_requests_total)
subject.call(env)
end
end
context 'when application raises an exception when the feature category context is present' do
before do
::Gitlab::ApplicationContext.push(feature_category: 'issue_tracking')
allow(app).to receive(:call).and_raise(StandardError)
end
it 'adds the feature category to the labels for http_requests_total' do
expect(described_class).to receive_message_chain(:http_requests_total, :increment).with(method: 'get', status: 'undefined', feature_category: 'issue_tracking')
expect { subject.call(env) }.to raise_error(StandardError)
end
end
context 'when the feature category context is not available' do
it 'sets the feature category to unknown' do
expect(described_class).to receive_message_chain(:http_requests_total, :increment).with(method: 'get', status: '200', feature_category: 'unknown')
expect(described_class).not_to receive(:http_health_requests_total)
subject.call(env)
end
end
end
describe '.initialize_metrics', :prometheus do
it "sets labels for http_requests_total" do
expected_labels = []
described_class::HTTP_METHODS.each do |method, statuses|
statuses.each do |status|
described_class::FEATURE_CATEGORIES_TO_INITIALIZE.each do |feature_category|
expected_labels << { method: method.to_s, status: status.to_s, feature_category: feature_category.to_s }
end
end
end
described_class.initialize_metrics
expect(described_class.http_requests_total.values.keys).to contain_exactly(*expected_labels)
end
it 'sets labels for http_request_duration_seconds' do
expected_labels = described_class::HTTP_METHODS.keys.map { |method| { method: method } }
described_class.initialize_metrics
expect(described_class.http_request_duration_seconds.values.keys).to include(*expected_labels)
end
it 'has every label in config/feature_categories.yml' do
defaults = [described_class::FEATURE_CATEGORY_DEFAULT, 'not_owned']
feature_categories = YAML.load_file(Rails.root.join('config', 'feature_categories.yml')).map(&:strip) + defaults
expect(described_class::FEATURE_CATEGORIES_TO_INITIALIZE).to all(be_in(feature_categories))
end
end
end
end
|