117 lines
3.3 KiB
Ruby
117 lines
3.3 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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require 'rake_helper'
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require_relative '../../../metrics_server/metrics_server'
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# End-to-end tests for the metrics server process we use to serve metrics
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# from forking applications (Sidekiq, Puma) to the Prometheus scraper.
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RSpec.describe 'GitLab metrics server', :aggregate_failures do
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let(:config_file) { Tempfile.new('gitlab.yml') }
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let(:address) { '127.0.0.1' }
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let(:port) { 3807 }
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let(:config) do
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{
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'test' => {
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'monitoring' => {
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'web_exporter' => {
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'address' => address,
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'enabled' => true,
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'port' => port
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},
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'sidekiq_exporter' => {
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'address' => address,
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'enabled' => true,
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'port' => port
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}
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}
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}
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}
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end
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before(:all) do
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Rake.application.rake_require 'tasks/gitlab/metrics_exporter'
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@exporter_path = Rails.root.join('tmp', 'test', 'gme')
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run_rake_task('gitlab:metrics_exporter:install', @exporter_path)
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end
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after(:all) do
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FileUtils.rm_rf(@exporter_path)
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end
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shared_examples 'serves metrics endpoint' do
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it 'serves /metrics endpoint' do
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start_server!
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expect do
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Timeout.timeout(10) do
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http_ok = false
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until http_ok
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sleep 1
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response = Gitlab::HTTP.try_get("http://#{address}:#{port}/metrics", allow_local_requests: true)
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http_ok = response&.success?
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end
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end
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end.not_to raise_error
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end
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end
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shared_examples 'spawns a server' do |target, use_golang_server|
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context "targeting #{target} when using Golang server is #{use_golang_server}" do
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let(:metrics_dir) { Dir.mktmpdir }
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subject(:start_server!) do
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@pid = MetricsServer.spawn(target, metrics_dir: metrics_dir, path: @exporter_path.join('bin'))
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end
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before do
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if use_golang_server
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stub_env('GITLAB_GOLANG_METRICS_SERVER', '1')
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allow(Settings).to receive(:monitoring).and_return(config.dig('test', 'monitoring'))
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else
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config_file.write(YAML.dump(config))
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config_file.close
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stub_env('GITLAB_CONFIG', config_file.path)
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end
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# We need to send a request to localhost
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WebMock.allow_net_connect!
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end
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after do
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webmock_enable!
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if @pid
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pgrp = Process.getpgid(@pid)
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Timeout.timeout(10) do
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Process.kill('TERM', -pgrp)
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Process.waitpid(@pid)
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end
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expect(Gitlab::ProcessManagement.process_alive?(@pid)).to be(false)
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end
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rescue Errno::ESRCH, Errno::ECHILD => _
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# 'No such process' or 'No child processes' means the process died before
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ensure
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config_file.unlink
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FileUtils.rm_rf(metrics_dir, secure: true)
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end
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it_behaves_like 'serves metrics endpoint'
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context 'when using Pathname instance as target directory' do
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let(:metrics_dir) { Pathname.new(Dir.mktmpdir) }
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it_behaves_like 'serves metrics endpoint'
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end
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end
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end
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it_behaves_like 'spawns a server', 'puma', true
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it_behaves_like 'spawns a server', 'puma', false
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it_behaves_like 'spawns a server', 'sidekiq', true
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it_behaves_like 'spawns a server', 'sidekiq', false
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end
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