// 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" "io/ioutil" "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" ) 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()) } func TestGlobalURL(t *testing.T) { opts := &Options{ ListenAddress: ":9090", ExternalURL: &url.URL{ Scheme: "https", Host: "externalhost:80", Path: "/path/prefix", }, } tests := []struct { inURL string outURL string }{ { // Nothing should change if the input URL is not on localhost, even if the port is our listening port. inURL: "http://somehost:9090/metrics", outURL: "http://somehost:9090/metrics", }, { // Port and host should change if target is on localhost and port is our listening port. inURL: "http://localhost:9090/metrics", outURL: "https://externalhost:80/metrics", }, { // Only the host should change if the port is not our listening port, but the host is localhost. inURL: "http://localhost:8000/metrics", outURL: "http://externalhost:8000/metrics", }, { // Alternative localhost representations should also work. inURL: "http://127.0.0.1:9090/metrics", outURL: "https://externalhost:80/metrics", }, } for _, test := range tests { inURL, err := url.Parse(test.inURL) require.NoError(t, err) globalURL := tmplFuncs("", opts)["globalURL"].(func(u *url.URL) *url.URL) outURL := globalURL(inURL) require.Equal(t, test.outURL, outURL.String()) } } type dbAdapter struct { *tsdb.DB } func (a *dbAdapter) Stats(statsByLabelName string) (*tsdb.Stats, error) { return a.Head().Stats(statsByLabelName), nil } func TestReadyAndHealthy(t *testing.T) { t.Parallel() dbDir, err := ioutil.TempDir("", "tsdb-ready") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dbDir)) }() db, err := tsdb.Open(dbDir, nil, nil, nil) require.NoError(t, err) opts := &Options{ ListenAddress: ":9090", 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:9090", Path: "/", }, Version: &PrometheusVersion{}, Gatherer: prometheus.DefaultGatherer, } opts.Flags = map[string]string{} webHandler := New(nil, opts) webHandler.config = &config.Config{} webHandler.notifier = ¬ifier.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) resp, err := http.Get("http://localhost:9090/-/healthy") require.NoError(t, err) require.Equal(t, http.StatusOK, resp.StatusCode) cleanupTestResponse(t, resp) for _, u := range []string{ "http://localhost:9090/-/ready", "http://localhost:9090/classic/graph", "http://localhost:9090/classic/flags", "http://localhost:9090/classic/rules", "http://localhost:9090/classic/service-discovery", "http://localhost:9090/classic/targets", "http://localhost:9090/classic/status", "http://localhost:9090/classic/config", } { resp, err = http.Get(u) require.NoError(t, err) require.Equal(t, http.StatusServiceUnavailable, resp.StatusCode) cleanupTestResponse(t, resp) } resp, err = http.Post("http://localhost:9090/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("http://localhost:9090/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.Ready() for _, u := range []string{ "http://localhost:9090/-/healthy", "http://localhost:9090/-/ready", "http://localhost:9090/classic/graph", "http://localhost:9090/classic/flags", "http://localhost:9090/classic/rules", "http://localhost:9090/classic/service-discovery", "http://localhost:9090/classic/targets", "http://localhost:9090/classic/status", "http://localhost:9090/classic/config", } { resp, err = http.Get(u) require.NoError(t, err) require.Equal(t, http.StatusOK, resp.StatusCode) cleanupTestResponse(t, resp) } resp, err = http.Post("http://localhost:9090/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("http://localhost:9090/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, err := ioutil.TempDir("", "tsdb-ready") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dbDir)) }() db, err := tsdb.Open(dbDir, nil, nil, nil) require.NoError(t, err) opts := &Options{ ListenAddress: ":9091", 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:9090", 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) resp, err := http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/healthy") require.NoError(t, err) require.Equal(t, http.StatusOK, resp.StatusCode) cleanupTestResponse(t, resp) resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/ready") require.NoError(t, err) require.Equal(t, http.StatusServiceUnavailable, resp.StatusCode) cleanupTestResponse(t, resp) resp, err = http.Post("http://localhost:9091"+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("http://localhost:9091"+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.Ready() resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/healthy") require.NoError(t, err) require.Equal(t, http.StatusOK, resp.StatusCode) cleanupTestResponse(t, resp) resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/ready") require.NoError(t, err) require.Equal(t, http.StatusOK, resp.StatusCode) cleanupTestResponse(t, resp) resp, err = http.Post("http://localhost:9091"+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("http://localhost:9091"+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.Ready() 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) counter := handler.metrics.requestCounter require.Equal(t, 1, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusServiceUnavailable))))) handler.Ready() for range [2]int{} { code = getReady() require.Equal(t, http.StatusOK, code) } 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))))) } func TestShutdownWithStaleConnection(t *testing.T) { dbDir, err := ioutil.TempDir("", "tsdb-ready") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dbDir)) }() db, err := tsdb.Open(dbDir, nil, nil, nil) require.NoError(t, err) timeout := 10 * time.Second opts := &Options{ ListenAddress: ":9090", 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:9090", Path: "/", }, Version: &PrometheusVersion{}, Gatherer: prometheus.DefaultGatherer, } opts.Flags = map[string]string{} webHandler := New(nil, opts) webHandler.config = &config.Config{} webHandler.notifier = ¬ifier.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", "localhost:9090") 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) { opts := &Options{ ListenAddress: ":9090", MaxConnections: 512, EnableLifecycle: true, RoutePrefix: "/", ExternalURL: &url.URL{ Scheme: "http", Host: "localhost:9090", Path: "/", }, } webHandler := New(nil, opts) webHandler.config = &config.Config{} webHandler.notifier = ¬ifier.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) 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("http://localhost:9090/-/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.") } } func cleanupTestResponse(t *testing.T, resp *http.Response) { _, err := io.Copy(ioutil.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 := ioutil.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"))) }