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482 lines
13 KiB
482 lines
13 KiB
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package web
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import (
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"context"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net"
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"net/http"
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"net/http/httptest"
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"net/url"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"testing"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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prom_testutil "github.com/prometheus/client_golang/prometheus/testutil"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/notifier"
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"github.com/prometheus/prometheus/rules"
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"github.com/prometheus/prometheus/scrape"
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"github.com/prometheus/prometheus/tsdb"
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"github.com/prometheus/prometheus/util/testutil"
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)
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func TestMain(m *testing.M) {
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// On linux with a global proxy the tests will fail as the go client(http,grpc) tries to connect through the proxy.
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os.Setenv("no_proxy", "localhost,127.0.0.1,0.0.0.0,:")
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os.Exit(m.Run())
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}
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func TestGlobalURL(t *testing.T) {
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opts := &Options{
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ListenAddress: ":9090",
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ExternalURL: &url.URL{
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Scheme: "https",
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Host: "externalhost:80",
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Path: "/path/prefix",
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},
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}
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tests := []struct {
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inURL string
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outURL string
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}{
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{
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// Nothing should change if the input URL is not on localhost, even if the port is our listening port.
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inURL: "http://somehost:9090/metrics",
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outURL: "http://somehost:9090/metrics",
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},
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{
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// Port and host should change if target is on localhost and port is our listening port.
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inURL: "http://localhost:9090/metrics",
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outURL: "https://externalhost:80/metrics",
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},
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{
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// Only the host should change if the port is not our listening port, but the host is localhost.
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inURL: "http://localhost:8000/metrics",
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outURL: "http://externalhost:8000/metrics",
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},
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{
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// Alternative localhost representations should also work.
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inURL: "http://127.0.0.1:9090/metrics",
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outURL: "https://externalhost:80/metrics",
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},
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}
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for _, test := range tests {
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inURL, err := url.Parse(test.inURL)
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testutil.Ok(t, err)
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globalURL := tmplFuncs("", opts)["globalURL"].(func(u *url.URL) *url.URL)
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outURL := globalURL(inURL)
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testutil.Equals(t, test.outURL, outURL.String())
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}
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}
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type dbAdapter struct {
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*tsdb.DB
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}
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func (a *dbAdapter) Stats(statsByLabelName string) (*tsdb.Stats, error) {
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return a.Head().Stats(statsByLabelName), nil
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}
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func TestReadyAndHealthy(t *testing.T) {
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t.Parallel()
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dbDir, err := ioutil.TempDir("", "tsdb-ready")
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testutil.Ok(t, err)
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defer func() { testutil.Ok(t, os.RemoveAll(dbDir)) }()
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db, err := tsdb.Open(dbDir, nil, nil, nil)
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testutil.Ok(t, err)
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opts := &Options{
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ListenAddress: ":9090",
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ReadTimeout: 30 * time.Second,
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MaxConnections: 512,
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Context: nil,
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Storage: nil,
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LocalStorage: &dbAdapter{db},
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TSDBDir: dbDir,
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QueryEngine: nil,
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ScrapeManager: &scrape.Manager{},
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RuleManager: &rules.Manager{},
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Notifier: nil,
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RoutePrefix: "/",
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EnableAdminAPI: true,
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ExternalURL: &url.URL{
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Scheme: "http",
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Host: "localhost:9090",
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Path: "/",
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},
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Version: &PrometheusVersion{},
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Gatherer: prometheus.DefaultGatherer,
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}
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opts.Flags = map[string]string{}
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webHandler := New(nil, opts)
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webHandler.config = &config.Config{}
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webHandler.notifier = ¬ifier.Manager{}
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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go func() {
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err := webHandler.Run(ctx)
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if err != nil {
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panic(fmt.Sprintf("Can't start web handler:%s", err))
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}
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}()
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// Give some time for the web goroutine to run since we need the server
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// to be up before starting tests.
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time.Sleep(5 * time.Second)
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resp, err := http.Get("http://localhost:9090/-/healthy")
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupTestResponse(t, resp)
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for _, u := range []string{
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"http://localhost:9090/-/ready",
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"http://localhost:9090/version",
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"http://localhost:9090/graph",
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"http://localhost:9090/flags",
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"http://localhost:9090/rules",
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"http://localhost:9090/service-discovery",
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"http://localhost:9090/targets",
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"http://localhost:9090/status",
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"http://localhost:9090/config",
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} {
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resp, err = http.Get(u)
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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cleanupTestResponse(t, resp)
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}
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resp, err = http.Post("http://localhost:9090/api/v2/admin/tsdb/snapshot", "", strings.NewReader(""))
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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cleanupTestResponse(t, resp)
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resp, err = http.Post("http://localhost:9090/api/v2/admin/tsdb/delete_series", "", strings.NewReader("{}"))
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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cleanupTestResponse(t, resp)
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// Set to ready.
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webHandler.Ready()
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for _, u := range []string{
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"http://localhost:9090/-/healthy",
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"http://localhost:9090/-/ready",
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"http://localhost:9090/version",
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"http://localhost:9090/graph",
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"http://localhost:9090/flags",
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"http://localhost:9090/rules",
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"http://localhost:9090/service-discovery",
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"http://localhost:9090/targets",
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"http://localhost:9090/status",
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"http://localhost:9090/config",
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} {
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resp, err = http.Get(u)
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupTestResponse(t, resp)
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}
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resp, err = http.Post("http://localhost:9090/api/v2/admin/tsdb/snapshot", "", strings.NewReader(""))
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupSnapshot(t, resp)
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cleanupTestResponse(t, resp)
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resp, err = http.Post("http://localhost:9090/api/v2/admin/tsdb/delete_series", "", strings.NewReader("{}"))
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupTestResponse(t, resp)
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}
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func TestRoutePrefix(t *testing.T) {
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t.Parallel()
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dbDir, err := ioutil.TempDir("", "tsdb-ready")
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testutil.Ok(t, err)
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defer func() { testutil.Ok(t, os.RemoveAll(dbDir)) }()
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db, err := tsdb.Open(dbDir, nil, nil, nil)
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testutil.Ok(t, err)
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opts := &Options{
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ListenAddress: ":9091",
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ReadTimeout: 30 * time.Second,
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MaxConnections: 512,
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Context: nil,
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TSDBDir: dbDir,
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LocalStorage: &dbAdapter{db},
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Storage: nil,
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QueryEngine: nil,
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ScrapeManager: nil,
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RuleManager: nil,
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Notifier: nil,
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RoutePrefix: "/prometheus",
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EnableAdminAPI: true,
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ExternalURL: &url.URL{
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Host: "localhost.localdomain:9090",
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Scheme: "http",
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},
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}
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opts.Flags = map[string]string{}
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webHandler := New(nil, opts)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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go func() {
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err := webHandler.Run(ctx)
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if err != nil {
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panic(fmt.Sprintf("Can't start web handler:%s", err))
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}
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}()
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// Give some time for the web goroutine to run since we need the server
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// to be up before starting tests.
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time.Sleep(5 * time.Second)
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resp, err := http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/healthy")
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupTestResponse(t, resp)
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resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/ready")
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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cleanupTestResponse(t, resp)
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resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/version")
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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cleanupTestResponse(t, resp)
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resp, err = http.Post("http://localhost:9091"+opts.RoutePrefix+"/api/v2/admin/tsdb/snapshot", "", strings.NewReader(""))
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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cleanupTestResponse(t, resp)
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resp, err = http.Post("http://localhost:9091"+opts.RoutePrefix+"/api/v2/admin/tsdb/delete_series", "", strings.NewReader("{}"))
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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cleanupTestResponse(t, resp)
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// Set to ready.
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webHandler.Ready()
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resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/healthy")
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupTestResponse(t, resp)
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resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/ready")
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupTestResponse(t, resp)
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resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/version")
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupTestResponse(t, resp)
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resp, err = http.Post("http://localhost:9091"+opts.RoutePrefix+"/api/v2/admin/tsdb/snapshot", "", strings.NewReader(""))
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupSnapshot(t, resp)
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cleanupTestResponse(t, resp)
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resp, err = http.Post("http://localhost:9091"+opts.RoutePrefix+"/api/v2/admin/tsdb/delete_series", "", strings.NewReader("{}"))
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testutil.Ok(t, err)
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testutil.Equals(t, http.StatusOK, resp.StatusCode)
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cleanupTestResponse(t, resp)
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}
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func TestDebugHandler(t *testing.T) {
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for _, tc := range []struct {
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prefix, url string
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code int
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}{
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{"/", "/debug/pprof/cmdline", 200},
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{"/foo", "/foo/debug/pprof/cmdline", 200},
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{"/", "/debug/pprof/goroutine", 200},
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{"/foo", "/foo/debug/pprof/goroutine", 200},
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{"/", "/debug/pprof/foo", 404},
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{"/foo", "/bar/debug/pprof/goroutine", 404},
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} {
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opts := &Options{
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RoutePrefix: tc.prefix,
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ListenAddress: "somehost:9090",
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ExternalURL: &url.URL{
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Host: "localhost.localdomain:9090",
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Scheme: "http",
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},
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}
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handler := New(nil, opts)
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handler.Ready()
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w := httptest.NewRecorder()
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req, err := http.NewRequest("GET", tc.url, nil)
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testutil.Ok(t, err)
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handler.router.ServeHTTP(w, req)
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testutil.Equals(t, tc.code, w.Code)
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}
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}
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func TestHTTPMetrics(t *testing.T) {
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t.Parallel()
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handler := New(nil, &Options{
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RoutePrefix: "/",
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ListenAddress: "somehost:9090",
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ExternalURL: &url.URL{
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Host: "localhost.localdomain:9090",
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Scheme: "http",
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},
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})
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getReady := func() int {
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t.Helper()
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w := httptest.NewRecorder()
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req, err := http.NewRequest("GET", "/-/ready", nil)
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testutil.Ok(t, err)
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handler.router.ServeHTTP(w, req)
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return w.Code
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}
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code := getReady()
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testutil.Equals(t, http.StatusServiceUnavailable, code)
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counter := handler.metrics.requestCounter
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testutil.Equals(t, 1, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusServiceUnavailable)))))
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handler.Ready()
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for range [2]int{} {
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code = getReady()
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testutil.Equals(t, http.StatusOK, code)
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}
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testutil.Equals(t, 2, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusOK)))))
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testutil.Equals(t, 1, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusServiceUnavailable)))))
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}
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func TestShutdownWithStaleConnection(t *testing.T) {
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dbDir, err := ioutil.TempDir("", "tsdb-ready")
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testutil.Ok(t, err)
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defer func() { testutil.Ok(t, os.RemoveAll(dbDir)) }()
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db, err := tsdb.Open(dbDir, nil, nil, nil)
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testutil.Ok(t, err)
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timeout := 10 * time.Second
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opts := &Options{
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ListenAddress: ":9090",
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ReadTimeout: timeout,
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MaxConnections: 512,
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Context: nil,
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Storage: nil,
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LocalStorage: &dbAdapter{db},
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TSDBDir: dbDir,
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QueryEngine: nil,
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ScrapeManager: &scrape.Manager{},
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RuleManager: &rules.Manager{},
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Notifier: nil,
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RoutePrefix: "/",
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ExternalURL: &url.URL{
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Scheme: "http",
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Host: "localhost:9090",
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Path: "/",
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},
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Version: &PrometheusVersion{},
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Gatherer: prometheus.DefaultGatherer,
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}
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opts.Flags = map[string]string{}
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webHandler := New(nil, opts)
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webHandler.config = &config.Config{}
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webHandler.notifier = ¬ifier.Manager{}
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closed := make(chan struct{})
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ctx, cancel := context.WithCancel(context.Background())
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go func() {
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err := webHandler.Run(ctx)
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if err != nil {
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panic(fmt.Sprintf("Can't start web handler:%s", err))
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}
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close(closed)
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}()
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// Give some time for the web goroutine to run since we need the server
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// to be up before starting tests.
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time.Sleep(5 * time.Second)
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// Open a socket, and don't use it. This connection should then be closed
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// after the ReadTimeout.
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c, err := net.Dial("tcp", "localhost:9090")
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testutil.Ok(t, err)
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t.Cleanup(func() { testutil.Ok(t, c.Close()) })
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// Stop the web handler.
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cancel()
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select {
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case <-closed:
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case <-time.After(timeout + 5*time.Second):
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t.Fatalf("Server still running after read timeout.")
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}
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}
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func cleanupTestResponse(t *testing.T, resp *http.Response) {
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_, err := io.Copy(ioutil.Discard, resp.Body)
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testutil.Ok(t, err)
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testutil.Ok(t, resp.Body.Close())
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}
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func cleanupSnapshot(t *testing.T, resp *http.Response) {
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snapshot := &struct {
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Name string `json:"name"`
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}{}
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b, err := ioutil.ReadAll(resp.Body)
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testutil.Ok(t, err)
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testutil.Ok(t, json.Unmarshal(b, snapshot))
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testutil.Assert(t, snapshot.Name != "", "snapshot directory not returned")
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testutil.Ok(t, os.Remove(filepath.Join("snapshots", snapshot.Name)))
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os.Remove("snapshots") // We do not check for err here to prevent existing setups to fail.
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}
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