prometheus/web/web_test.go

610 lines
17 KiB
Go

// Copyright 2016 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.
package web
import (
"context"
"encoding/json"
"fmt"
"io"
"net"
"net/http"
"net/http/httptest"
"net/url"
"os"
"path/filepath"
"strconv"
"strings"
"sync"
"testing"
"time"
"github.com/prometheus/client_golang/prometheus"
prom_testutil "github.com/prometheus/client_golang/prometheus/testutil"
"github.com/stretchr/testify/require"
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/notifier"
"github.com/prometheus/prometheus/rules"
"github.com/prometheus/prometheus/scrape"
"github.com/prometheus/prometheus/tsdb"
"github.com/prometheus/prometheus/util/testutil"
)
func TestMain(m *testing.M) {
// On linux with a global proxy the tests will fail as the go client(http,grpc) tries to connect through the proxy.
os.Setenv("no_proxy", "localhost,127.0.0.1,0.0.0.0,:")
os.Exit(m.Run())
}
type dbAdapter struct {
*tsdb.DB
}
func (a *dbAdapter) Stats(statsByLabelName string) (*tsdb.Stats, error) {
return a.Head().Stats(statsByLabelName), nil
}
func (a *dbAdapter) WALReplayStatus() (tsdb.WALReplayStatus, error) {
return tsdb.WALReplayStatus{}, nil
}
func TestReadyAndHealthy(t *testing.T) {
t.Parallel()
dbDir := t.TempDir()
db, err := tsdb.Open(dbDir, nil, nil, nil, nil)
require.NoError(t, err)
t.Cleanup(func() {
require.NoError(t, db.Close())
})
port := fmt.Sprintf(":%d", testutil.RandomUnprivilegedPort(t))
opts := &Options{
ListenAddress: port,
ReadTimeout: 30 * time.Second,
MaxConnections: 512,
Context: nil,
Storage: nil,
LocalStorage: &dbAdapter{db},
TSDBDir: dbDir,
QueryEngine: nil,
ScrapeManager: &scrape.Manager{},
RuleManager: &rules.Manager{},
Notifier: nil,
RoutePrefix: "/",
EnableAdminAPI: true,
ExternalURL: &url.URL{
Scheme: "http",
Host: "localhost" + port,
Path: "/",
},
Version: &PrometheusVersion{},
Gatherer: prometheus.DefaultGatherer,
}
opts.Flags = map[string]string{}
webHandler := New(nil, opts)
webHandler.config = &config.Config{}
webHandler.notifier = &notifier.Manager{}
l, err := webHandler.Listener()
if err != nil {
panic(fmt.Sprintf("Unable to start web listener: %s", err))
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
go func() {
err := webHandler.Run(ctx, l, "")
if err != nil {
panic(fmt.Sprintf("Can't start web handler:%s", err))
}
}()
// Give some time for the web goroutine to run since we need the server
// to be up before starting tests.
time.Sleep(5 * time.Second)
baseURL := "http://localhost" + port
resp, err := http.Get(baseURL + "/-/healthy")
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
cleanupTestResponse(t, resp)
for _, u := range []string{
baseURL + "/-/ready",
} {
resp, err = http.Get(u)
require.NoError(t, err)
require.Equal(t, http.StatusServiceUnavailable, resp.StatusCode)
cleanupTestResponse(t, resp)
}
resp, err = http.Post(baseURL+"/api/v1/admin/tsdb/snapshot", "", strings.NewReader(""))
require.NoError(t, err)
require.Equal(t, http.StatusServiceUnavailable, resp.StatusCode)
cleanupTestResponse(t, resp)
resp, err = http.Post(baseURL+"/api/v1/admin/tsdb/delete_series", "", strings.NewReader("{}"))
require.NoError(t, err)
require.Equal(t, http.StatusServiceUnavailable, resp.StatusCode)
cleanupTestResponse(t, resp)
// Set to ready.
webHandler.SetReady(true)
for _, u := range []string{
baseURL + "/-/healthy",
baseURL + "/-/ready",
} {
resp, err = http.Get(u)
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
cleanupTestResponse(t, resp)
}
resp, err = http.Post(baseURL+"/api/v1/admin/tsdb/snapshot", "", strings.NewReader(""))
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
cleanupSnapshot(t, dbDir, resp)
cleanupTestResponse(t, resp)
resp, err = http.Post(baseURL+"/api/v1/admin/tsdb/delete_series?match[]=up", "", nil)
require.NoError(t, err)
require.Equal(t, http.StatusNoContent, resp.StatusCode)
cleanupTestResponse(t, resp)
}
func TestRoutePrefix(t *testing.T) {
t.Parallel()
dbDir := t.TempDir()
db, err := tsdb.Open(dbDir, nil, nil, nil, nil)
require.NoError(t, err)
t.Cleanup(func() {
require.NoError(t, db.Close())
})
port := fmt.Sprintf(":%d", testutil.RandomUnprivilegedPort(t))
opts := &Options{
ListenAddress: port,
ReadTimeout: 30 * time.Second,
MaxConnections: 512,
Context: nil,
TSDBDir: dbDir,
LocalStorage: &dbAdapter{db},
Storage: nil,
QueryEngine: nil,
ScrapeManager: nil,
RuleManager: nil,
Notifier: nil,
RoutePrefix: "/prometheus",
EnableAdminAPI: true,
ExternalURL: &url.URL{
Host: "localhost.localdomain" + port,
Scheme: "http",
},
}
opts.Flags = map[string]string{}
webHandler := New(nil, opts)
l, err := webHandler.Listener()
if err != nil {
panic(fmt.Sprintf("Unable to start web listener: %s", err))
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
go func() {
err := webHandler.Run(ctx, l, "")
if err != nil {
panic(fmt.Sprintf("Can't start web handler:%s", err))
}
}()
// Give some time for the web goroutine to run since we need the server
// to be up before starting tests.
time.Sleep(5 * time.Second)
baseURL := "http://localhost" + port
resp, err := http.Get(baseURL + opts.RoutePrefix + "/-/healthy")
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
cleanupTestResponse(t, resp)
resp, err = http.Get(baseURL + opts.RoutePrefix + "/-/ready")
require.NoError(t, err)
require.Equal(t, http.StatusServiceUnavailable, resp.StatusCode)
cleanupTestResponse(t, resp)
resp, err = http.Post(baseURL+opts.RoutePrefix+"/api/v1/admin/tsdb/snapshot", "", strings.NewReader(""))
require.NoError(t, err)
require.Equal(t, http.StatusServiceUnavailable, resp.StatusCode)
cleanupTestResponse(t, resp)
resp, err = http.Post(baseURL+opts.RoutePrefix+"/api/v1/admin/tsdb/delete_series", "", strings.NewReader("{}"))
require.NoError(t, err)
require.Equal(t, http.StatusServiceUnavailable, resp.StatusCode)
cleanupTestResponse(t, resp)
// Set to ready.
webHandler.SetReady(true)
resp, err = http.Get(baseURL + opts.RoutePrefix + "/-/healthy")
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
cleanupTestResponse(t, resp)
resp, err = http.Get(baseURL + opts.RoutePrefix + "/-/ready")
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
cleanupTestResponse(t, resp)
resp, err = http.Post(baseURL+opts.RoutePrefix+"/api/v1/admin/tsdb/snapshot", "", strings.NewReader(""))
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
cleanupSnapshot(t, dbDir, resp)
cleanupTestResponse(t, resp)
resp, err = http.Post(baseURL+opts.RoutePrefix+"/api/v1/admin/tsdb/delete_series?match[]=up", "", nil)
require.NoError(t, err)
require.Equal(t, http.StatusNoContent, resp.StatusCode)
cleanupTestResponse(t, resp)
}
func TestDebugHandler(t *testing.T) {
for _, tc := range []struct {
prefix, url string
code int
}{
{"/", "/debug/pprof/cmdline", 200},
{"/foo", "/foo/debug/pprof/cmdline", 200},
{"/", "/debug/pprof/goroutine", 200},
{"/foo", "/foo/debug/pprof/goroutine", 200},
{"/", "/debug/pprof/foo", 404},
{"/foo", "/bar/debug/pprof/goroutine", 404},
} {
opts := &Options{
RoutePrefix: tc.prefix,
ListenAddress: "somehost:9090",
ExternalURL: &url.URL{
Host: "localhost.localdomain:9090",
Scheme: "http",
},
}
handler := New(nil, opts)
handler.SetReady(true)
w := httptest.NewRecorder()
req, err := http.NewRequest("GET", tc.url, nil)
require.NoError(t, err)
handler.router.ServeHTTP(w, req)
require.Equal(t, tc.code, w.Code)
}
}
func TestHTTPMetrics(t *testing.T) {
t.Parallel()
handler := New(nil, &Options{
RoutePrefix: "/",
ListenAddress: "somehost:9090",
ExternalURL: &url.URL{
Host: "localhost.localdomain:9090",
Scheme: "http",
},
})
getReady := func() int {
t.Helper()
w := httptest.NewRecorder()
req, err := http.NewRequest("GET", "/-/ready", nil)
require.NoError(t, err)
handler.router.ServeHTTP(w, req)
return w.Code
}
code := getReady()
require.Equal(t, http.StatusServiceUnavailable, code)
ready := handler.metrics.readyStatus
require.Equal(t, 0, int(prom_testutil.ToFloat64(ready)))
counter := handler.metrics.requestCounter
require.Equal(t, 1, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusServiceUnavailable)))))
handler.SetReady(true)
for range [2]int{} {
code = getReady()
require.Equal(t, http.StatusOK, code)
}
require.Equal(t, 1, int(prom_testutil.ToFloat64(ready)))
require.Equal(t, 2, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusOK)))))
require.Equal(t, 1, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusServiceUnavailable)))))
handler.SetReady(false)
for range [2]int{} {
code = getReady()
require.Equal(t, http.StatusServiceUnavailable, code)
}
require.Equal(t, 0, int(prom_testutil.ToFloat64(ready)))
require.Equal(t, 2, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusOK)))))
require.Equal(t, 3, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusServiceUnavailable)))))
}
func TestShutdownWithStaleConnection(t *testing.T) {
dbDir := t.TempDir()
db, err := tsdb.Open(dbDir, nil, nil, nil, nil)
require.NoError(t, err)
t.Cleanup(func() {
require.NoError(t, db.Close())
})
timeout := 10 * time.Second
port := fmt.Sprintf(":%d", testutil.RandomUnprivilegedPort(t))
opts := &Options{
ListenAddress: port,
ReadTimeout: timeout,
MaxConnections: 512,
Context: nil,
Storage: nil,
LocalStorage: &dbAdapter{db},
TSDBDir: dbDir,
QueryEngine: nil,
ScrapeManager: &scrape.Manager{},
RuleManager: &rules.Manager{},
Notifier: nil,
RoutePrefix: "/",
ExternalURL: &url.URL{
Scheme: "http",
Host: "localhost" + port,
Path: "/",
},
Version: &PrometheusVersion{},
Gatherer: prometheus.DefaultGatherer,
}
opts.Flags = map[string]string{}
webHandler := New(nil, opts)
webHandler.config = &config.Config{}
webHandler.notifier = &notifier.Manager{}
l, err := webHandler.Listener()
if err != nil {
panic(fmt.Sprintf("Unable to start web listener: %s", err))
}
closed := make(chan struct{})
ctx, cancel := context.WithCancel(context.Background())
go func() {
err := webHandler.Run(ctx, l, "")
if err != nil {
panic(fmt.Sprintf("Can't start web handler:%s", err))
}
close(closed)
}()
// Give some time for the web goroutine to run since we need the server
// to be up before starting tests.
time.Sleep(5 * time.Second)
// Open a socket, and don't use it. This connection should then be closed
// after the ReadTimeout.
c, err := net.Dial("tcp", opts.ExternalURL.Host)
require.NoError(t, err)
t.Cleanup(func() { require.NoError(t, c.Close()) })
// Stop the web handler.
cancel()
select {
case <-closed:
case <-time.After(timeout + 5*time.Second):
t.Fatalf("Server still running after read timeout.")
}
}
func TestHandleMultipleQuitRequests(t *testing.T) {
port := fmt.Sprintf(":%d", testutil.RandomUnprivilegedPort(t))
opts := &Options{
ListenAddress: port,
MaxConnections: 512,
EnableLifecycle: true,
RoutePrefix: "/",
ExternalURL: &url.URL{
Scheme: "http",
Host: "localhost" + port,
Path: "/",
},
}
webHandler := New(nil, opts)
webHandler.config = &config.Config{}
webHandler.notifier = &notifier.Manager{}
l, err := webHandler.Listener()
if err != nil {
panic(fmt.Sprintf("Unable to start web listener: %s", err))
}
ctx, cancel := context.WithCancel(context.Background())
closed := make(chan struct{})
go func() {
err := webHandler.Run(ctx, l, "")
if err != nil {
panic(fmt.Sprintf("Can't start web handler:%s", err))
}
close(closed)
}()
// Give some time for the web goroutine to run since we need the server
// to be up before starting tests.
time.Sleep(5 * time.Second)
baseURL := opts.ExternalURL.Scheme + "://" + opts.ExternalURL.Host
start := make(chan struct{})
var wg sync.WaitGroup
for i := 0; i < 3; i++ {
wg.Add(1)
go func() {
defer wg.Done()
<-start
resp, err := http.Post(baseURL+"/-/quit", "", strings.NewReader(""))
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
}()
}
close(start)
wg.Wait()
// Stop the web handler.
cancel()
select {
case <-closed:
case <-time.After(5 * time.Second):
t.Fatalf("Server still running after 5 seconds.")
}
}
// Test for availability of API endpoints in Prometheus Agent mode.
func TestAgentAPIEndPoints(t *testing.T) {
t.Parallel()
port := fmt.Sprintf(":%d", testutil.RandomUnprivilegedPort(t))
opts := &Options{
ListenAddress: port,
ReadTimeout: 30 * time.Second,
MaxConnections: 512,
Context: nil,
Storage: nil,
QueryEngine: nil,
ScrapeManager: &scrape.Manager{},
RuleManager: &rules.Manager{},
Notifier: nil,
RoutePrefix: "/",
EnableAdminAPI: true,
ExternalURL: &url.URL{
Scheme: "http",
Host: "localhost" + port,
Path: "/",
},
Version: &PrometheusVersion{},
Gatherer: prometheus.DefaultGatherer,
IsAgent: true,
}
opts.Flags = map[string]string{}
webHandler := New(nil, opts)
webHandler.SetReady(true)
webHandler.config = &config.Config{}
webHandler.notifier = &notifier.Manager{}
l, err := webHandler.Listener()
if err != nil {
panic(fmt.Sprintf("Unable to start web listener: %s", err))
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
go func() {
err := webHandler.Run(ctx, l, "")
if err != nil {
panic(fmt.Sprintf("Can't start web handler:%s", err))
}
}()
// Give some time for the web goroutine to run since we need the server
// to be up before starting tests.
time.Sleep(5 * time.Second)
baseURL := "http://localhost" + port + "/api/v1"
// Test for non-available endpoints in the Agent mode.
for path, methods := range map[string][]string{
"/labels": {http.MethodGet, http.MethodPost},
"/label/:name/values": {http.MethodGet},
"/series": {http.MethodGet, http.MethodPost, http.MethodDelete},
"/alertmanagers": {http.MethodGet},
"/query": {http.MethodGet, http.MethodPost},
"/query_range": {http.MethodGet, http.MethodPost},
"/query_exemplars": {http.MethodGet, http.MethodPost},
"/status/tsdb": {http.MethodGet},
"/alerts": {http.MethodGet},
"/rules": {http.MethodGet},
"/admin/tsdb/delete_series": {http.MethodPost, http.MethodPut},
"/admin/tsdb/clean_tombstones": {http.MethodPost, http.MethodPut},
"/admin/tsdb/snapshot": {http.MethodPost, http.MethodPut},
} {
for _, m := range methods {
req, err := http.NewRequest(m, baseURL+path, nil)
require.NoError(t, err)
resp, err := http.DefaultClient.Do(req)
require.NoError(t, err)
require.Equal(t, http.StatusUnprocessableEntity, resp.StatusCode)
}
}
// Test for some of available endpoints in the Agent mode.
for path, methods := range map[string][]string{
"/targets": {http.MethodGet},
"/targets/metadata": {http.MethodGet},
"/metadata": {http.MethodGet},
"/status/config": {http.MethodGet},
"/status/runtimeinfo": {http.MethodGet},
"/status/flags": {http.MethodGet},
} {
for _, m := range methods {
req, err := http.NewRequest(m, baseURL+path, nil)
require.NoError(t, err)
resp, err := http.DefaultClient.Do(req)
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
}
}
}
func cleanupTestResponse(t *testing.T, resp *http.Response) {
_, err := io.Copy(io.Discard, resp.Body)
require.NoError(t, err)
require.NoError(t, resp.Body.Close())
}
func cleanupSnapshot(t *testing.T, dbDir string, resp *http.Response) {
snapshot := &struct {
Data struct {
Name string `json:"name"`
} `json:"data"`
}{}
b, err := io.ReadAll(resp.Body)
require.NoError(t, err)
require.NoError(t, json.Unmarshal(b, snapshot))
require.NotZero(t, snapshot.Data.Name, "snapshot directory not returned")
require.NoError(t, os.Remove(filepath.Join(dbDir, "snapshots", snapshot.Data.Name)))
require.NoError(t, os.Remove(filepath.Join(dbDir, "snapshots")))
}