mirror of
https://github.com/prometheus-community/windows_exporter.git
synced 2026-10-17 10:09:05 +02:00
Jan-Otto KröpkeandClaude Opus 5.5
809330b07c
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>
332 lines
13 KiB
Go
332 lines
13 KiB
Go
// SPDX-License-Identifier: Apache-2.0
|
|
//
|
|
// Copyright The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
//go:build windows
|
|
|
|
package httphandler_test
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"log/slog"
|
|
"math"
|
|
"net/http"
|
|
"net/http/httptest"
|
|
"testing"
|
|
"testing/synctest"
|
|
"time"
|
|
|
|
"github.com/prometheus-community/windows_exporter/internal/httphandler"
|
|
"github.com/prometheus-community/windows_exporter/internal/mi"
|
|
"github.com/prometheus-community/windows_exporter/internal/types"
|
|
"github.com/prometheus-community/windows_exporter/pkg/collector"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
func TestMetricsHTTPHandler(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
for _, tc := range []struct {
|
|
name string
|
|
query string
|
|
options *httphandler.Options
|
|
status int
|
|
included []string
|
|
excluded []string
|
|
}{
|
|
{name: "default", status: http.StatusOK, included: []string{"windows_test_first 42", "windows_test_second 42", "go_goroutines", "windows_exporter_build_info", "go_sched_goroutines_running_goroutines", "go_sched_goroutines_waiting_goroutines", "go_sched_goroutines_created_goroutines_total", "go_sched_threads_total_threads", "go_sched_latencies_seconds_bucket"}},
|
|
{name: "disable exporter metrics", options: &httphandler.Options{DisableExporterMetrics: true, TimeoutMargin: 0.5}, status: http.StatusOK, included: []string{"windows_test_first 42", "windows_exporter_build_info"}, excluded: []string{"go_goroutines", "process_cpu_seconds_total", "go_sched_goroutines_running_goroutines"}},
|
|
{name: "filter", query: "?collect[]=first", status: http.StatusOK, included: []string{"windows_test_first 42"}, excluded: []string{"windows_test_second"}},
|
|
{name: "multiple collectors", query: "?collect[]=first&collect[]=second", status: http.StatusOK, included: []string{"windows_test_first 42", "windows_test_second 42"}},
|
|
{name: "unknown collector", query: "?collect[]=missing", status: http.StatusBadRequest, included: []string{"unknown collector missing"}},
|
|
} {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
collection := collector.New(collector.Map{
|
|
"first": &testCollector{name: "first"},
|
|
"second": &testCollector{name: "second"},
|
|
})
|
|
handler := httphandler.New(slog.New(slog.DiscardHandler), collection, tc.options)
|
|
request := httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/metrics"+tc.query, nil)
|
|
response := httptest.NewRecorder()
|
|
handler.ServeHTTP(response, request)
|
|
|
|
require.Equal(t, tc.status, response.Code)
|
|
|
|
for _, value := range tc.included {
|
|
require.Contains(t, response.Body.String(), value)
|
|
}
|
|
|
|
for _, value := range tc.excluded {
|
|
require.NotContains(t, response.Body.String(), value)
|
|
}
|
|
|
|
// Filtering one request must not remove collectors from later requests.
|
|
if tc.query == "?collect[]=first" {
|
|
response = httptest.NewRecorder()
|
|
handler.ServeHTTP(response, httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/metrics", nil))
|
|
require.Equal(t, http.StatusOK, response.Code)
|
|
require.Contains(t, response.Body.String(), "windows_test_second 42")
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestMetricsHTTPHandlerCollectorStatus(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
for _, tc := range []struct {
|
|
name string
|
|
err error
|
|
panicValue bool
|
|
success string
|
|
}{
|
|
{name: "success", success: "1"},
|
|
{name: "failure", err: errors.New("collector failed"), success: "0"},
|
|
{name: "no data", err: types.ErrNoData, success: "1"},
|
|
{name: "panic", panicValue: true, success: "0"},
|
|
} {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
collection := collector.New(collector.Map{"test": &testCollector{name: "test", err: tc.err, panicValue: tc.panicValue}})
|
|
handler := httphandler.New(slog.New(slog.DiscardHandler), collection, &httphandler.Options{DisableExporterMetrics: true})
|
|
response := httptest.NewRecorder()
|
|
handler.ServeHTTP(response, httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/metrics", nil))
|
|
|
|
require.Equal(t, http.StatusOK, response.Code)
|
|
require.Contains(t, response.Body.String(), `windows_exporter_collector_success{collector="test"} `+tc.success)
|
|
require.Contains(t, response.Body.String(), `windows_exporter_collector_timeout{collector="test"} 0`)
|
|
})
|
|
}
|
|
}
|
|
|
|
// TestMetricsHTTPHandlerNameCollision checks a collector metric that has the name of an exporter metric,
|
|
// like a textfile metric named go_goroutines.
|
|
func TestMetricsHTTPHandlerNameCollision(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
for _, tc := range []struct {
|
|
name string
|
|
options *httphandler.Options
|
|
included []string
|
|
excluded []string
|
|
}{
|
|
{
|
|
name: "exporter metrics",
|
|
// The collector metric has another help text, so it is dropped and the other metrics are kept.
|
|
included: []string{"# HELP go_goroutines Number of goroutines that currently exist.", "windows_test_first 42", "windows_exporter_build_info"},
|
|
excluded: []string{"go_goroutines 7", "Collector goroutines"},
|
|
},
|
|
{
|
|
name: "disable exporter metrics",
|
|
options: &httphandler.Options{DisableExporterMetrics: true, TimeoutMargin: 0.5},
|
|
included: []string{"# HELP go_goroutines Collector goroutines", "go_goroutines 7", "windows_test_first 42", "windows_exporter_build_info"},
|
|
excluded: []string{"Number of goroutines that currently exist."},
|
|
},
|
|
} {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
collection := collector.New(collector.Map{
|
|
"first": &testCollector{name: "first"},
|
|
"collision": &collisionCollector{},
|
|
})
|
|
handler := httphandler.New(slog.New(slog.DiscardHandler), collection, tc.options)
|
|
response := httptest.NewRecorder()
|
|
handler.ServeHTTP(response, httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/metrics", nil))
|
|
|
|
require.Equal(t, http.StatusOK, response.Code)
|
|
|
|
for _, value := range tc.included {
|
|
require.Contains(t, response.Body.String(), value)
|
|
}
|
|
|
|
for _, value := range tc.excluded {
|
|
require.NotContains(t, response.Body.String(), value)
|
|
}
|
|
|
|
if tc.options == nil {
|
|
// The gathering error of the first scrape is counted like before.
|
|
response = httptest.NewRecorder()
|
|
handler.ServeHTTP(response, httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/metrics", nil))
|
|
require.Contains(t, response.Body.String(), `promhttp_metric_handler_errors_total{cause="gathering"} 1`)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestMetricsHTTPHandlerScrapeTimeout(t *testing.T) {
|
|
for _, tc := range []struct {
|
|
name string
|
|
header string
|
|
timeout bool
|
|
}{
|
|
{name: "missing header"},
|
|
{name: "invalid header", header: "invalid"},
|
|
{name: "zero header", header: "0"},
|
|
{name: "sufficient timeout", header: "2"},
|
|
{name: "timeout", header: "0.1", timeout: true},
|
|
} {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
// The collector's delay and deadline use synthetic time.
|
|
synctest.Test(t, func(t *testing.T) {
|
|
collection := collector.New(collector.Map{"test": &testCollector{name: "test", delay: time.Second}})
|
|
handler := httphandler.New(slog.New(slog.DiscardHandler), collection, &httphandler.Options{DisableExporterMetrics: true})
|
|
request := httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/metrics", nil)
|
|
request.Header.Set("X-Prometheus-Scrape-Timeout-Seconds", tc.header)
|
|
|
|
response := httptest.NewRecorder()
|
|
handler.ServeHTTP(response, request)
|
|
|
|
require.Equal(t, http.StatusOK, response.Code)
|
|
|
|
if tc.timeout {
|
|
require.Contains(t, response.Body.String(), `windows_exporter_collector_timeout{collector="test"} 1`)
|
|
require.NotContains(t, response.Body.String(), "windows_test_test 42")
|
|
|
|
// Finish the delayed collector and its drain goroutine before leaving the bubble.
|
|
time.Sleep(time.Second)
|
|
synctest.Wait()
|
|
} else {
|
|
require.Contains(t, response.Body.String(), `windows_exporter_collector_timeout{collector="test"} 0`)
|
|
require.Contains(t, response.Body.String(), "windows_test_test 42")
|
|
}
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestMetricsHTTPHandlerScrapeBudget(t *testing.T) {
|
|
const maxScrapeTimeout = 5 * time.Minute
|
|
|
|
for _, tc := range []struct {
|
|
name string
|
|
header string
|
|
margin float64
|
|
want time.Duration
|
|
}{
|
|
{name: "missing header", margin: 0.5, want: 9500 * time.Millisecond},
|
|
{name: "invalid header", header: "invalid", margin: 0.5, want: 9500 * time.Millisecond},
|
|
{name: "zero", header: "0", margin: 0.5, want: 9500 * time.Millisecond},
|
|
{name: "negative", header: "-1", margin: 0.5, want: 9500 * time.Millisecond},
|
|
{name: "negative infinity", header: "-Inf", margin: 0.5, want: 9500 * time.Millisecond},
|
|
{name: "NaN", header: "NaN", margin: 0.5, want: 9500 * time.Millisecond},
|
|
{name: "infinity", header: "+Inf", margin: 0.5, want: maxScrapeTimeout - 500*time.Millisecond},
|
|
{name: "out of float range", header: "1e400", margin: 0.5, want: maxScrapeTimeout - 500*time.Millisecond},
|
|
{name: "huge", header: "1e12", margin: 0.5, want: maxScrapeTimeout - 500*time.Millisecond},
|
|
{name: "long", header: "120", margin: 0.5, want: 119500 * time.Millisecond},
|
|
{name: "regular", header: "2", margin: 0.5, want: 1500 * time.Millisecond},
|
|
{name: "margin larger than timeout", header: "0.3", margin: 0.5, want: 150 * time.Millisecond},
|
|
{name: "margin takes at most half", header: "0.8", margin: 0.5, want: 400 * time.Millisecond},
|
|
{name: "tiny", header: "0.000001", margin: 0.5, want: 10 * time.Millisecond},
|
|
{name: "no margin", header: "2", want: 2 * time.Second},
|
|
{name: "negative margin", header: "2", margin: -1, want: 2 * time.Second},
|
|
{name: "NaN margin", header: "2", margin: math.NaN(), want: 2 * time.Second},
|
|
} {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
// Synthetic time doesn't pass between the request and the collector's call.
|
|
synctest.Test(t, func(t *testing.T) {
|
|
test := &budgetCollector{}
|
|
collection := collector.New(collector.Map{"test": test})
|
|
handler := httphandler.New(slog.New(slog.DiscardHandler), collection, &httphandler.Options{DisableExporterMetrics: true, TimeoutMargin: tc.margin})
|
|
request := httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/metrics", nil)
|
|
|
|
if tc.header != "" {
|
|
request.Header.Set("X-Prometheus-Scrape-Timeout-Seconds", tc.header)
|
|
}
|
|
|
|
response := httptest.NewRecorder()
|
|
handler.ServeHTTP(response, request)
|
|
|
|
require.Equal(t, http.StatusOK, response.Code)
|
|
require.Contains(t, response.Body.String(), `windows_exporter_collector_success{collector="test"} 1`)
|
|
require.Equal(t, tc.want, test.budget)
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestMetricsHTTPHandlerCanceledRequest(t *testing.T) {
|
|
test := &budgetCollector{}
|
|
collection := collector.New(collector.Map{"test": test})
|
|
handler := httphandler.New(slog.New(slog.DiscardHandler), collection, &httphandler.Options{DisableExporterMetrics: true})
|
|
|
|
ctx, cancel := context.WithCancel(t.Context())
|
|
cancel()
|
|
|
|
response := httptest.NewRecorder()
|
|
handler.ServeHTTP(response, httptest.NewRequestWithContext(ctx, http.MethodGet, "/metrics", nil))
|
|
|
|
// The client is gone, so the collectors don't run.
|
|
require.False(t, test.called)
|
|
}
|
|
|
|
// budgetCollector records the time it is given.
|
|
type budgetCollector struct {
|
|
called bool
|
|
budget time.Duration
|
|
}
|
|
|
|
func (c *budgetCollector) GetName() string { return "test" }
|
|
func (c *budgetCollector) Build(_ *slog.Logger, _ *mi.Session) error { return nil }
|
|
func (c *budgetCollector) Close() error { return nil }
|
|
func (c *budgetCollector) Collect(_ chan<- prometheus.Metric, maxScrapeDuration time.Duration) error {
|
|
c.called = true
|
|
c.budget = maxScrapeDuration
|
|
|
|
return nil
|
|
}
|
|
|
|
type testCollector struct {
|
|
name string
|
|
err error
|
|
panicValue bool
|
|
delay time.Duration
|
|
}
|
|
|
|
func (c *testCollector) GetName() string { return c.name }
|
|
func (c *testCollector) Build(_ *slog.Logger, _ *mi.Session) error { return nil }
|
|
func (c *testCollector) Close() error { return nil }
|
|
func (c *testCollector) Collect(ch chan<- prometheus.Metric, _ time.Duration) error {
|
|
if c.panicValue {
|
|
panic("test collector panic")
|
|
}
|
|
|
|
time.Sleep(c.delay)
|
|
|
|
if c.err != nil {
|
|
return c.err
|
|
}
|
|
|
|
ch <- prometheus.MustNewConstMetric(prometheus.NewDesc("windows_test_"+c.name, "Test metric", nil, nil), prometheus.GaugeValue, 42)
|
|
|
|
return nil
|
|
}
|
|
|
|
// collisionCollector emits a metric with the name of a Go runtime metric.
|
|
type collisionCollector struct{}
|
|
|
|
func (c *collisionCollector) GetName() string { return "collision" }
|
|
func (c *collisionCollector) Build(_ *slog.Logger, _ *mi.Session) error { return nil }
|
|
func (c *collisionCollector) Close() error { return nil }
|
|
func (c *collisionCollector) Collect(ch chan<- prometheus.Metric, _ time.Duration) error {
|
|
ch <- prometheus.MustNewConstMetric(prometheus.NewDesc("go_goroutines", "Collector goroutines", nil, nil), prometheus.GaugeValue, 7)
|
|
|
|
return nil
|
|
}
|