prometheus/web/web_test.go

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// 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 (
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"context"
"fmt"
"io/ioutil"
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"net/http"
"net/http/httptest"
"net/url"
"os"
"strconv"
"strings"
"testing"
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"time"
"github.com/prometheus/client_golang/prometheus"
prom_testutil "github.com/prometheus/client_golang/prometheus/testutil"
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/notifier"
"github.com/prometheus/prometheus/rules"
"github.com/prometheus/prometheus/scrape"
"github.com/prometheus/prometheus/storage/tsdb"
libtsdb "github.com/prometheus/prometheus/tsdb"
"github.com/prometheus/prometheus/util/testutil"
)
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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)
testutil.Ok(t, err)
globalURL := tmplFuncs("", opts)["globalURL"].(func(u *url.URL) *url.URL)
outURL := globalURL(inURL)
testutil.Equals(t, test.outURL, outURL.String())
}
}
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func TestReadyAndHealthy(t *testing.T) {
t.Parallel()
dbDir, err := ioutil.TempDir("", "tsdb-ready")
testutil.Ok(t, err)
defer os.RemoveAll(dbDir)
db, err := libtsdb.Open(dbDir, nil, nil, nil)
testutil.Ok(t, err)
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opts := &Options{
ListenAddress: ":9090",
ReadTimeout: 30 * time.Second,
MaxConnections: 512,
Context: nil,
Storage: &tsdb.ReadyStorage{},
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QueryEngine: nil,
ScrapeManager: &scrape.Manager{},
RuleManager: &rules.Manager{},
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Notifier: nil,
RoutePrefix: "/",
EnableAdminAPI: true,
TSDB: func() *libtsdb.DB { return db },
ExternalURL: &url.URL{
Scheme: "http",
Host: "localhost:9090",
Path: "/",
},
Version: &PrometheusVersion{},
Gatherer: prometheus.DefaultGatherer,
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}
opts.Flags = map[string]string{}
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webHandler := New(nil, opts)
webHandler.config = &config.Config{}
webHandler.notifier = &notifier.Manager{}
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go func() {
err := webHandler.Run(context.Background())
if err != nil {
panic(fmt.Sprintf("Can't start web handler:%s", err))
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}
}()
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// 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")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
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resp, err = http.Get("http://localhost:9090/-/ready")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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resp, err = http.Get("http://localhost:9090/version")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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resp, err = http.Get("http://localhost:9090/graph")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Post("http://localhost:9090/api/v2/admin/tsdb/snapshot", "", strings.NewReader(""))
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Post("http://localhost:9090/api/v2/admin/tsdb/delete_series", "", strings.NewReader("{}"))
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/graph")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/alerts")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/flags")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/rules")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/service-discovery")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/targets")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/config")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/status")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
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// Set to ready.
webHandler.Ready()
resp, err = http.Get("http://localhost:9090/-/healthy")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
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resp, err = http.Get("http://localhost:9090/-/ready")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
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resp, err = http.Get("http://localhost:9090/version")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/graph")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Post("http://localhost:9090/api/v2/admin/tsdb/snapshot", "", strings.NewReader(""))
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Post("http://localhost:9090/api/v2/admin/tsdb/delete_series", "", strings.NewReader("{}"))
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/alerts")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/flags")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/rules")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/service-discovery")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/targets")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/config")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9090/status")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
}
func TestRoutePrefix(t *testing.T) {
t.Parallel()
dbDir, err := ioutil.TempDir("", "tsdb-ready")
testutil.Ok(t, err)
defer os.RemoveAll(dbDir)
db, err := libtsdb.Open(dbDir, nil, nil, nil)
testutil.Ok(t, err)
opts := &Options{
ListenAddress: ":9091",
ReadTimeout: 30 * time.Second,
MaxConnections: 512,
Context: nil,
Storage: &tsdb.ReadyStorage{},
QueryEngine: nil,
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ScrapeManager: nil,
RuleManager: nil,
Notifier: nil,
RoutePrefix: "/prometheus",
EnableAdminAPI: true,
TSDB: func() *libtsdb.DB { return db },
}
opts.Flags = map[string]string{}
webHandler := New(nil, opts)
go func() {
err := webHandler.Run(context.Background())
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")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/ready")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/version")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Post("http://localhost:9091"+opts.RoutePrefix+"/api/v2/admin/tsdb/snapshot", "", strings.NewReader(""))
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
resp, err = http.Post("http://localhost:9091"+opts.RoutePrefix+"/api/v2/admin/tsdb/delete_series", "", strings.NewReader("{}"))
testutil.Ok(t, err)
testutil.Equals(t, http.StatusServiceUnavailable, resp.StatusCode)
// Set to ready.
webHandler.Ready()
resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/healthy")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
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resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/-/ready")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Get("http://localhost:9091" + opts.RoutePrefix + "/version")
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Post("http://localhost:9091"+opts.RoutePrefix+"/api/v2/admin/tsdb/snapshot", "", strings.NewReader(""))
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
resp, err = http.Post("http://localhost:9091"+opts.RoutePrefix+"/api/v2/admin/tsdb/delete_series", "", strings.NewReader("{}"))
testutil.Ok(t, err)
testutil.Equals(t, http.StatusOK, resp.StatusCode)
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}
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,
}
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handler := New(nil, opts)
handler.Ready()
w := httptest.NewRecorder()
req, err := http.NewRequest("GET", tc.url, nil)
testutil.Ok(t, err)
handler.router.ServeHTTP(w, req)
testutil.Equals(t, tc.code, w.Code)
}
}
func TestHTTPMetrics(t *testing.T) {
t.Parallel()
handler := New(nil, &Options{RoutePrefix: "/"})
getReady := func() int {
t.Helper()
w := httptest.NewRecorder()
req, err := http.NewRequest("GET", "/-/ready", nil)
testutil.Ok(t, err)
handler.router.ServeHTTP(w, req)
return w.Code
}
code := getReady()
testutil.Equals(t, http.StatusServiceUnavailable, code)
counter := handler.metrics.requestCounter
testutil.Equals(t, 1, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusServiceUnavailable)))))
handler.Ready()
for range [2]int{} {
code = getReady()
testutil.Equals(t, http.StatusOK, code)
}
testutil.Equals(t, 2, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusOK)))))
testutil.Equals(t, 1, int(prom_testutil.ToFloat64(counter.WithLabelValues("/-/ready", strconv.Itoa(http.StatusServiceUnavailable)))))
}