prometheus/scrape/target_test.go

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// Copyright 2013 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 scrape
import (
"crypto/tls"
"crypto/x509"
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"fmt"
"net/http"
"net/http/httptest"
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"net/url"
"os"
"strconv"
"strings"
"testing"
"time"
config_util "github.com/prometheus/common/config"
"github.com/prometheus/common/model"
"github.com/stretchr/testify/require"
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/discovery/targetgroup"
"github.com/prometheus/prometheus/model/histogram"
"github.com/prometheus/prometheus/model/labels"
)
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const (
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caCertPath = "testdata/ca.cer"
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)
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func TestTargetLabels(t *testing.T) {
target := newTestTarget("example.com:80", 0, labels.FromStrings("job", "some_job", "foo", "bar"))
want := labels.FromStrings(model.JobLabel, "some_job", "foo", "bar")
b := labels.NewScratchBuilder(0)
got := target.Labels(&b)
require.Equal(t, want, got)
i := 0
target.LabelsRange(func(l labels.Label) {
switch i {
case 0:
require.Equal(t, labels.Label{Name: "foo", Value: "bar"}, l)
case 1:
require.Equal(t, labels.Label{Name: model.JobLabel, Value: "some_job"}, l)
}
i++
})
require.Equal(t, 2, i)
}
func TestTargetOffset(t *testing.T) {
interval := 10 * time.Second
offsetSeed := uint64(0)
offsets := make([]time.Duration, 10000)
// Calculate offsets for 10000 different targets.
for i := range offsets {
target := newTestTarget("example.com:80", 0, labels.FromStrings(
"label", strconv.Itoa(i),
))
offsets[i] = target.offset(interval, offsetSeed)
}
// Put the offsets into buckets and validate that they are all
// within bounds.
bucketSize := 1 * time.Second
buckets := make([]int, interval/bucketSize)
for _, offset := range offsets {
require.InDelta(t, time.Duration(0), offset, float64(interval), "Offset %v out of bounds.", offset)
bucket := offset / bucketSize
buckets[bucket]++
}
t.Log(buckets)
// Calculate whether the number of targets per bucket
// does not differ more than a given tolerance.
avg := len(offsets) / len(buckets)
tolerance := 0.15
for _, bucket := range buckets {
diff := bucket - avg
if diff < 0 {
diff = -diff
}
require.LessOrEqual(t, float64(diff)/float64(avg), tolerance, "Bucket out of tolerance bounds.")
}
}
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func TestTargetURL(t *testing.T) {
params := url.Values{
"abc": []string{"foo", "bar", "baz"},
"xyz": []string{"hoo"},
}
labels := labels.FromMap(map[string]string{
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model.AddressLabel: "example.com:1234",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metricz",
"__param_abc": "overwrite",
"__param_cde": "huu",
})
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target := NewTarget(labels, labels, params)
// The reserved labels are concatenated into a full URL. The first value for each
// URL query parameter can be set/modified via labels as well.
expectedParams := url.Values{
"abc": []string{"overwrite", "bar", "baz"},
"cde": []string{"huu"},
"xyz": []string{"hoo"},
}
expectedURL := &url.URL{
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Scheme: "https",
Host: "example.com:1234",
Path: "/metricz",
RawQuery: expectedParams.Encode(),
}
require.Equal(t, expectedURL, target.URL())
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}
func newTestTarget(targetURL string, _ time.Duration, lbls labels.Labels) *Target {
lb := labels.NewBuilder(lbls)
lb.Set(model.SchemeLabel, "http")
lb.Set(model.AddressLabel, strings.TrimPrefix(targetURL, "http://"))
lb.Set(model.MetricsPathLabel, "/metrics")
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return &Target{labels: lb.Labels()}
}
func TestNewHTTPBearerToken(t *testing.T) {
server := httptest.NewServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
expected := "Bearer 1234"
received := r.Header.Get("Authorization")
require.Equal(t, expected, received, "Authorization header was not set correctly.")
},
),
)
defer server.Close()
Refactor SD configuration to remove `config` dependency (#3629) * refactor: move targetGroup struct and CheckOverflow() to their own package * refactor: move auth and security related structs to a utility package, fix import error in utility package * refactor: Azure SD, remove SD struct from config * refactor: DNS SD, remove SD struct from config into dns package * refactor: ec2 SD, move SD struct from config into the ec2 package * refactor: file SD, move SD struct from config to file discovery package * refactor: gce, move SD struct from config to gce discovery package * refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil * refactor: consul, move SD struct from config into consul discovery package * refactor: marathon, move SD struct from config into marathon discovery package * refactor: triton, move SD struct from config to triton discovery package, fix test * refactor: zookeeper, move SD structs from config to zookeeper discovery package * refactor: openstack, remove SD struct from config, move into openstack discovery package * refactor: kubernetes, move SD struct from config into kubernetes discovery package * refactor: notifier, use targetgroup package instead of config * refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup * refactor: retrieval, use targetgroup package instead of config.TargetGroup * refactor: storage, use config util package * refactor: discovery manager, use targetgroup package instead of config.TargetGroup * refactor: use HTTPClient and TLS config from configUtil instead of config * refactor: tests, use targetgroup package instead of config.TargetGroup * refactor: fix tagetgroup.Group pointers that were removed by mistake * refactor: openstack, kubernetes: drop prefixes * refactor: remove import aliases forced due to vscode bug * refactor: move main SD struct out of config into discovery/config * refactor: rename configUtil to config_util * refactor: rename yamlUtil to yaml_config * refactor: kubernetes, remove prefixes * refactor: move the TargetGroup package to discovery/ * refactor: fix order of imports
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cfg := config_util.HTTPClientConfig{
BearerToken: "1234",
}
c, err := config_util.NewClientFromConfig(cfg, "test")
require.NoError(t, err)
_, err = c.Get(server.URL)
require.NoError(t, err)
}
func TestNewHTTPBearerTokenFile(t *testing.T) {
server := httptest.NewServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
expected := "Bearer 12345"
received := r.Header.Get("Authorization")
require.Equal(t, expected, received, "Authorization header was not set correctly.")
},
),
)
defer server.Close()
Refactor SD configuration to remove `config` dependency (#3629) * refactor: move targetGroup struct and CheckOverflow() to their own package * refactor: move auth and security related structs to a utility package, fix import error in utility package * refactor: Azure SD, remove SD struct from config * refactor: DNS SD, remove SD struct from config into dns package * refactor: ec2 SD, move SD struct from config into the ec2 package * refactor: file SD, move SD struct from config to file discovery package * refactor: gce, move SD struct from config to gce discovery package * refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil * refactor: consul, move SD struct from config into consul discovery package * refactor: marathon, move SD struct from config into marathon discovery package * refactor: triton, move SD struct from config to triton discovery package, fix test * refactor: zookeeper, move SD structs from config to zookeeper discovery package * refactor: openstack, remove SD struct from config, move into openstack discovery package * refactor: kubernetes, move SD struct from config into kubernetes discovery package * refactor: notifier, use targetgroup package instead of config * refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup * refactor: retrieval, use targetgroup package instead of config.TargetGroup * refactor: storage, use config util package * refactor: discovery manager, use targetgroup package instead of config.TargetGroup * refactor: use HTTPClient and TLS config from configUtil instead of config * refactor: tests, use targetgroup package instead of config.TargetGroup * refactor: fix tagetgroup.Group pointers that were removed by mistake * refactor: openstack, kubernetes: drop prefixes * refactor: remove import aliases forced due to vscode bug * refactor: move main SD struct out of config into discovery/config * refactor: rename configUtil to config_util * refactor: rename yamlUtil to yaml_config * refactor: kubernetes, remove prefixes * refactor: move the TargetGroup package to discovery/ * refactor: fix order of imports
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cfg := config_util.HTTPClientConfig{
BearerTokenFile: "testdata/bearertoken.txt",
}
c, err := config_util.NewClientFromConfig(cfg, "test")
require.NoError(t, err)
_, err = c.Get(server.URL)
require.NoError(t, err)
}
func TestNewHTTPBasicAuth(t *testing.T) {
server := httptest.NewServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
username, password, ok := r.BasicAuth()
require.True(t, ok, "Basic authorization header was not set correctly.")
require.Equal(t, "user", username)
require.Equal(t, "password123", password)
},
),
)
defer server.Close()
Refactor SD configuration to remove `config` dependency (#3629) * refactor: move targetGroup struct and CheckOverflow() to their own package * refactor: move auth and security related structs to a utility package, fix import error in utility package * refactor: Azure SD, remove SD struct from config * refactor: DNS SD, remove SD struct from config into dns package * refactor: ec2 SD, move SD struct from config into the ec2 package * refactor: file SD, move SD struct from config to file discovery package * refactor: gce, move SD struct from config to gce discovery package * refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil * refactor: consul, move SD struct from config into consul discovery package * refactor: marathon, move SD struct from config into marathon discovery package * refactor: triton, move SD struct from config to triton discovery package, fix test * refactor: zookeeper, move SD structs from config to zookeeper discovery package * refactor: openstack, remove SD struct from config, move into openstack discovery package * refactor: kubernetes, move SD struct from config into kubernetes discovery package * refactor: notifier, use targetgroup package instead of config * refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup * refactor: retrieval, use targetgroup package instead of config.TargetGroup * refactor: storage, use config util package * refactor: discovery manager, use targetgroup package instead of config.TargetGroup * refactor: use HTTPClient and TLS config from configUtil instead of config * refactor: tests, use targetgroup package instead of config.TargetGroup * refactor: fix tagetgroup.Group pointers that were removed by mistake * refactor: openstack, kubernetes: drop prefixes * refactor: remove import aliases forced due to vscode bug * refactor: move main SD struct out of config into discovery/config * refactor: rename configUtil to config_util * refactor: rename yamlUtil to yaml_config * refactor: kubernetes, remove prefixes * refactor: move the TargetGroup package to discovery/ * refactor: fix order of imports
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cfg := config_util.HTTPClientConfig{
BasicAuth: &config_util.BasicAuth{
Username: "user",
Password: "password123",
},
}
c, err := config_util.NewClientFromConfig(cfg, "test")
require.NoError(t, err)
_, err = c.Get(server.URL)
require.NoError(t, err)
}
func TestNewHTTPCACert(t *testing.T) {
server := httptest.NewUnstartedServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
w.Write([]byte{})
},
),
)
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server.TLS = newTLSConfig("server", t)
server.StartTLS()
defer server.Close()
Refactor SD configuration to remove `config` dependency (#3629) * refactor: move targetGroup struct and CheckOverflow() to their own package * refactor: move auth and security related structs to a utility package, fix import error in utility package * refactor: Azure SD, remove SD struct from config * refactor: DNS SD, remove SD struct from config into dns package * refactor: ec2 SD, move SD struct from config into the ec2 package * refactor: file SD, move SD struct from config to file discovery package * refactor: gce, move SD struct from config to gce discovery package * refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil * refactor: consul, move SD struct from config into consul discovery package * refactor: marathon, move SD struct from config into marathon discovery package * refactor: triton, move SD struct from config to triton discovery package, fix test * refactor: zookeeper, move SD structs from config to zookeeper discovery package * refactor: openstack, remove SD struct from config, move into openstack discovery package * refactor: kubernetes, move SD struct from config into kubernetes discovery package * refactor: notifier, use targetgroup package instead of config * refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup * refactor: retrieval, use targetgroup package instead of config.TargetGroup * refactor: storage, use config util package * refactor: discovery manager, use targetgroup package instead of config.TargetGroup * refactor: use HTTPClient and TLS config from configUtil instead of config * refactor: tests, use targetgroup package instead of config.TargetGroup * refactor: fix tagetgroup.Group pointers that were removed by mistake * refactor: openstack, kubernetes: drop prefixes * refactor: remove import aliases forced due to vscode bug * refactor: move main SD struct out of config into discovery/config * refactor: rename configUtil to config_util * refactor: rename yamlUtil to yaml_config * refactor: kubernetes, remove prefixes * refactor: move the TargetGroup package to discovery/ * refactor: fix order of imports
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cfg := config_util.HTTPClientConfig{
TLSConfig: config_util.TLSConfig{
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CAFile: caCertPath,
},
}
c, err := config_util.NewClientFromConfig(cfg, "test")
require.NoError(t, err)
_, err = c.Get(server.URL)
require.NoError(t, err)
}
func TestNewHTTPClientCert(t *testing.T) {
server := httptest.NewUnstartedServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
w.Write([]byte{})
},
),
)
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tlsConfig := newTLSConfig("server", t)
tlsConfig.ClientAuth = tls.RequireAndVerifyClientCert
tlsConfig.ClientCAs = tlsConfig.RootCAs
server.TLS = tlsConfig
server.StartTLS()
defer server.Close()
Refactor SD configuration to remove `config` dependency (#3629) * refactor: move targetGroup struct and CheckOverflow() to their own package * refactor: move auth and security related structs to a utility package, fix import error in utility package * refactor: Azure SD, remove SD struct from config * refactor: DNS SD, remove SD struct from config into dns package * refactor: ec2 SD, move SD struct from config into the ec2 package * refactor: file SD, move SD struct from config to file discovery package * refactor: gce, move SD struct from config to gce discovery package * refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil * refactor: consul, move SD struct from config into consul discovery package * refactor: marathon, move SD struct from config into marathon discovery package * refactor: triton, move SD struct from config to triton discovery package, fix test * refactor: zookeeper, move SD structs from config to zookeeper discovery package * refactor: openstack, remove SD struct from config, move into openstack discovery package * refactor: kubernetes, move SD struct from config into kubernetes discovery package * refactor: notifier, use targetgroup package instead of config * refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup * refactor: retrieval, use targetgroup package instead of config.TargetGroup * refactor: storage, use config util package * refactor: discovery manager, use targetgroup package instead of config.TargetGroup * refactor: use HTTPClient and TLS config from configUtil instead of config * refactor: tests, use targetgroup package instead of config.TargetGroup * refactor: fix tagetgroup.Group pointers that were removed by mistake * refactor: openstack, kubernetes: drop prefixes * refactor: remove import aliases forced due to vscode bug * refactor: move main SD struct out of config into discovery/config * refactor: rename configUtil to config_util * refactor: rename yamlUtil to yaml_config * refactor: kubernetes, remove prefixes * refactor: move the TargetGroup package to discovery/ * refactor: fix order of imports
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cfg := config_util.HTTPClientConfig{
TLSConfig: config_util.TLSConfig{
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CAFile: caCertPath,
CertFile: "testdata/client.cer",
KeyFile: "testdata/client.key",
},
}
c, err := config_util.NewClientFromConfig(cfg, "test")
require.NoError(t, err)
_, err = c.Get(server.URL)
require.NoError(t, err)
}
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func TestNewHTTPWithServerName(t *testing.T) {
server := httptest.NewUnstartedServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
w.Write([]byte{})
},
),
)
server.TLS = newTLSConfig("servername", t)
server.StartTLS()
defer server.Close()
Refactor SD configuration to remove `config` dependency (#3629) * refactor: move targetGroup struct and CheckOverflow() to their own package * refactor: move auth and security related structs to a utility package, fix import error in utility package * refactor: Azure SD, remove SD struct from config * refactor: DNS SD, remove SD struct from config into dns package * refactor: ec2 SD, move SD struct from config into the ec2 package * refactor: file SD, move SD struct from config to file discovery package * refactor: gce, move SD struct from config to gce discovery package * refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil * refactor: consul, move SD struct from config into consul discovery package * refactor: marathon, move SD struct from config into marathon discovery package * refactor: triton, move SD struct from config to triton discovery package, fix test * refactor: zookeeper, move SD structs from config to zookeeper discovery package * refactor: openstack, remove SD struct from config, move into openstack discovery package * refactor: kubernetes, move SD struct from config into kubernetes discovery package * refactor: notifier, use targetgroup package instead of config * refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup * refactor: retrieval, use targetgroup package instead of config.TargetGroup * refactor: storage, use config util package * refactor: discovery manager, use targetgroup package instead of config.TargetGroup * refactor: use HTTPClient and TLS config from configUtil instead of config * refactor: tests, use targetgroup package instead of config.TargetGroup * refactor: fix tagetgroup.Group pointers that were removed by mistake * refactor: openstack, kubernetes: drop prefixes * refactor: remove import aliases forced due to vscode bug * refactor: move main SD struct out of config into discovery/config * refactor: rename configUtil to config_util * refactor: rename yamlUtil to yaml_config * refactor: kubernetes, remove prefixes * refactor: move the TargetGroup package to discovery/ * refactor: fix order of imports
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cfg := config_util.HTTPClientConfig{
TLSConfig: config_util.TLSConfig{
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CAFile: caCertPath,
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ServerName: "prometheus.rocks",
},
}
c, err := config_util.NewClientFromConfig(cfg, "test")
require.NoError(t, err)
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_, err = c.Get(server.URL)
require.NoError(t, err)
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}
func TestNewHTTPWithBadServerName(t *testing.T) {
server := httptest.NewUnstartedServer(
http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
w.Write([]byte{})
},
),
)
server.TLS = newTLSConfig("servername", t)
server.StartTLS()
defer server.Close()
Refactor SD configuration to remove `config` dependency (#3629) * refactor: move targetGroup struct and CheckOverflow() to their own package * refactor: move auth and security related structs to a utility package, fix import error in utility package * refactor: Azure SD, remove SD struct from config * refactor: DNS SD, remove SD struct from config into dns package * refactor: ec2 SD, move SD struct from config into the ec2 package * refactor: file SD, move SD struct from config to file discovery package * refactor: gce, move SD struct from config to gce discovery package * refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil * refactor: consul, move SD struct from config into consul discovery package * refactor: marathon, move SD struct from config into marathon discovery package * refactor: triton, move SD struct from config to triton discovery package, fix test * refactor: zookeeper, move SD structs from config to zookeeper discovery package * refactor: openstack, remove SD struct from config, move into openstack discovery package * refactor: kubernetes, move SD struct from config into kubernetes discovery package * refactor: notifier, use targetgroup package instead of config * refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup * refactor: retrieval, use targetgroup package instead of config.TargetGroup * refactor: storage, use config util package * refactor: discovery manager, use targetgroup package instead of config.TargetGroup * refactor: use HTTPClient and TLS config from configUtil instead of config * refactor: tests, use targetgroup package instead of config.TargetGroup * refactor: fix tagetgroup.Group pointers that were removed by mistake * refactor: openstack, kubernetes: drop prefixes * refactor: remove import aliases forced due to vscode bug * refactor: move main SD struct out of config into discovery/config * refactor: rename configUtil to config_util * refactor: rename yamlUtil to yaml_config * refactor: kubernetes, remove prefixes * refactor: move the TargetGroup package to discovery/ * refactor: fix order of imports
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cfg := config_util.HTTPClientConfig{
TLSConfig: config_util.TLSConfig{
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CAFile: caCertPath,
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ServerName: "badname",
},
}
c, err := config_util.NewClientFromConfig(cfg, "test")
require.NoError(t, err)
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_, err = c.Get(server.URL)
require.Error(t, err)
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}
func newTLSConfig(certName string, t *testing.T) *tls.Config {
tlsConfig := &tls.Config{}
caCertPool := x509.NewCertPool()
caCert, err := os.ReadFile(caCertPath)
require.NoError(t, err, "Couldn't read CA cert.")
caCertPool.AppendCertsFromPEM(caCert)
tlsConfig.RootCAs = caCertPool
tlsConfig.ServerName = "127.0.0.1"
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certPath := fmt.Sprintf("testdata/%s.cer", certName)
keyPath := fmt.Sprintf("testdata/%s.key", certName)
cert, err := tls.LoadX509KeyPair(certPath, keyPath)
require.NoError(t, err, "Unable to use specified server cert (%s) & key (%v).", certPath, keyPath)
tlsConfig.Certificates = []tls.Certificate{cert}
return tlsConfig
}
func TestNewClientWithBadTLSConfig(t *testing.T) {
Refactor SD configuration to remove `config` dependency (#3629) * refactor: move targetGroup struct and CheckOverflow() to their own package * refactor: move auth and security related structs to a utility package, fix import error in utility package * refactor: Azure SD, remove SD struct from config * refactor: DNS SD, remove SD struct from config into dns package * refactor: ec2 SD, move SD struct from config into the ec2 package * refactor: file SD, move SD struct from config to file discovery package * refactor: gce, move SD struct from config to gce discovery package * refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil * refactor: consul, move SD struct from config into consul discovery package * refactor: marathon, move SD struct from config into marathon discovery package * refactor: triton, move SD struct from config to triton discovery package, fix test * refactor: zookeeper, move SD structs from config to zookeeper discovery package * refactor: openstack, remove SD struct from config, move into openstack discovery package * refactor: kubernetes, move SD struct from config into kubernetes discovery package * refactor: notifier, use targetgroup package instead of config * refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup * refactor: retrieval, use targetgroup package instead of config.TargetGroup * refactor: storage, use config util package * refactor: discovery manager, use targetgroup package instead of config.TargetGroup * refactor: use HTTPClient and TLS config from configUtil instead of config * refactor: tests, use targetgroup package instead of config.TargetGroup * refactor: fix tagetgroup.Group pointers that were removed by mistake * refactor: openstack, kubernetes: drop prefixes * refactor: remove import aliases forced due to vscode bug * refactor: move main SD struct out of config into discovery/config * refactor: rename configUtil to config_util * refactor: rename yamlUtil to yaml_config * refactor: kubernetes, remove prefixes * refactor: move the TargetGroup package to discovery/ * refactor: fix order of imports
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cfg := config_util.HTTPClientConfig{
TLSConfig: config_util.TLSConfig{
CAFile: "testdata/nonexistent_ca.cer",
CertFile: "testdata/nonexistent_client.cer",
KeyFile: "testdata/nonexistent_client.key",
},
}
_, err := config_util.NewClientFromConfig(cfg, "test")
require.Error(t, err)
}
func TestTargetsFromGroup(t *testing.T) {
expectedError := "instance 0 in group : no address"
cfg := config.ScrapeConfig{
ScrapeTimeout: model.Duration(10 * time.Second),
ScrapeInterval: model.Duration(1 * time.Minute),
}
lb := labels.NewBuilder(labels.EmptyLabels())
targets, failures := TargetsFromGroup(&targetgroup.Group{Targets: []model.LabelSet{{}, {model.AddressLabel: "localhost:9090"}}}, &cfg, false, nil, lb)
require.Len(t, targets, 1)
require.Len(t, failures, 1)
require.EqualError(t, failures[0], expectedError)
}
func BenchmarkTargetsFromGroup(b *testing.B) {
// Simulate Kubernetes service-discovery and use subset of rules from typical Prometheus config.
cfgText := `
scrape_configs:
- job_name: job1
scrape_interval: 15s
scrape_timeout: 10s
relabel_configs:
- source_labels: [__meta_kubernetes_pod_container_port_name]
separator: ;
regex: .*-metrics
replacement: $1
action: keep
- source_labels: [__meta_kubernetes_pod_phase]
separator: ;
regex: Succeeded|Failed
replacement: $1
action: drop
- source_labels: [__meta_kubernetes_namespace, __meta_kubernetes_pod_label_name]
separator: /
regex: (.*)
target_label: job
replacement: $1
action: replace
- source_labels: [__meta_kubernetes_namespace]
separator: ;
regex: (.*)
target_label: namespace
replacement: $1
action: replace
- source_labels: [__meta_kubernetes_pod_name]
separator: ;
regex: (.*)
target_label: pod
replacement: $1
action: replace
- source_labels: [__meta_kubernetes_pod_container_name]
separator: ;
regex: (.*)
target_label: container
replacement: $1
action: replace
- source_labels: [__meta_kubernetes_pod_name, __meta_kubernetes_pod_container_name,
__meta_kubernetes_pod_container_port_name]
separator: ':'
regex: (.*)
target_label: instance
replacement: $1
action: replace
- separator: ;
regex: (.*)
target_label: cluster
replacement: dev-us-central-0
action: replace
`
config := loadConfiguration(b, cfgText)
for _, nTargets := range []int{1, 10, 100} {
b.Run(fmt.Sprintf("%d_targets", nTargets), func(b *testing.B) {
targets := []model.LabelSet{}
for i := 0; i < nTargets; i++ {
labels := model.LabelSet{
model.AddressLabel: model.LabelValue(fmt.Sprintf("localhost:%d", i)),
"__meta_kubernetes_namespace": "some_namespace",
"__meta_kubernetes_pod_container_name": "some_container",
"__meta_kubernetes_pod_container_port_name": "http-metrics",
"__meta_kubernetes_pod_container_port_number": "80",
"__meta_kubernetes_pod_label_name": "some_name",
"__meta_kubernetes_pod_name": "some_pod",
"__meta_kubernetes_pod_phase": "Running",
}
// Add some more labels, because Kubernetes SD generates a lot
for i := 0; i < 10; i++ {
labels[model.LabelName(fmt.Sprintf("__meta_kubernetes_pod_label_extra%d", i))] = "a_label_abcdefgh"
labels[model.LabelName(fmt.Sprintf("__meta_kubernetes_pod_labelpresent_extra%d", i))] = "true"
}
targets = append(targets, labels)
}
var tgets []*Target
lb := labels.NewBuilder(labels.EmptyLabels())
group := &targetgroup.Group{Targets: targets}
for i := 0; i < b.N; i++ {
tgets, _ = TargetsFromGroup(group, config.ScrapeConfigs[0], false, tgets, lb)
if len(targets) != nTargets {
b.Fatalf("Expected %d targets, got %d", nTargets, len(targets))
}
}
})
}
}
func TestBucketLimitAppender(t *testing.T) {
example := histogram.Histogram{
Schema: 0,
Count: 21,
Sum: 33,
ZeroThreshold: 0.001,
ZeroCount: 3,
PositiveSpans: []histogram.Span{
{Offset: 0, Length: 3},
},
PositiveBuckets: []int64{3, 0, 0},
NegativeSpans: []histogram.Span{
{Offset: 0, Length: 3},
},
NegativeBuckets: []int64{3, 0, 0},
}
bigGap := histogram.Histogram{
Schema: 0,
Count: 21,
Sum: 33,
ZeroThreshold: 0.001,
ZeroCount: 3,
PositiveSpans: []histogram.Span{
{Offset: 1, Length: 1}, // in (1, 2]
{Offset: 2, Length: 1}, // in (8, 16]
},
PositiveBuckets: []int64{1, 0}, // 1, 1
}
customBuckets := histogram.Histogram{
Schema: histogram.CustomBucketsSchema,
Count: 9,
Sum: 33,
PositiveSpans: []histogram.Span{
{Offset: 0, Length: 3},
},
PositiveBuckets: []int64{3, 0, 0},
CustomValues: []float64{1, 2, 3},
}
cases := []struct {
h histogram.Histogram
limit int
expectError bool
expectBucketCount int
expectSchema int32
}{
{
h: example,
limit: 3,
expectError: true,
},
{
h: example,
limit: 4,
expectError: false,
expectBucketCount: 4,
expectSchema: -1,
},
{
h: example,
limit: 10,
expectError: false,
expectBucketCount: 6,
expectSchema: 0,
},
{
h: bigGap,
limit: 1,
expectError: false,
expectBucketCount: 1,
expectSchema: -2,
},
{
h: customBuckets,
limit: 2,
expectError: true,
},
{
h: customBuckets,
limit: 3,
expectError: false,
expectBucketCount: 3,
expectSchema: histogram.CustomBucketsSchema,
},
}
resApp := &collectResultAppender{}
for _, c := range cases {
for _, floatHisto := range []bool{true, false} {
t.Run(fmt.Sprintf("floatHistogram=%t", floatHisto), func(t *testing.T) {
app := &bucketLimitAppender{Appender: resApp, limit: c.limit}
ts := int64(10 * time.Minute / time.Millisecond)
lbls := labels.FromStrings("__name__", "sparse_histogram_series")
var err error
if floatHisto {
fh := c.h.Copy().ToFloat(nil)
_, err = app.AppendHistogram(0, lbls, ts, nil, fh)
if c.expectError {
require.Error(t, err)
} else {
require.Equal(t, c.expectSchema, fh.Schema)
require.Equal(t, c.expectBucketCount, len(fh.NegativeBuckets)+len(fh.PositiveBuckets))
require.NoError(t, err)
}
} else {
h := c.h.Copy()
_, err = app.AppendHistogram(0, lbls, ts, h, nil)
if c.expectError {
require.Error(t, err)
} else {
require.Equal(t, c.expectSchema, h.Schema)
require.Equal(t, c.expectBucketCount, len(h.NegativeBuckets)+len(h.PositiveBuckets))
require.NoError(t, err)
}
}
require.NoError(t, app.Commit())
})
}
}
}
func TestMaxSchemaAppender(t *testing.T) {
example := histogram.Histogram{
Schema: 0,
Count: 21,
Sum: 33,
ZeroThreshold: 0.001,
ZeroCount: 3,
PositiveSpans: []histogram.Span{
{Offset: 0, Length: 3},
},
PositiveBuckets: []int64{3, 0, 0},
NegativeSpans: []histogram.Span{
{Offset: 0, Length: 3},
},
NegativeBuckets: []int64{3, 0, 0},
}
customBuckets := histogram.Histogram{
Schema: histogram.CustomBucketsSchema,
Count: 9,
Sum: 33,
PositiveSpans: []histogram.Span{
{Offset: 0, Length: 3},
},
PositiveBuckets: []int64{3, 0, 0},
CustomValues: []float64{1, 2, 3},
}
cases := []struct {
h histogram.Histogram
maxSchema int32
expectSchema int32
}{
{
h: example,
maxSchema: -1,
expectSchema: -1,
},
{
h: example,
maxSchema: 0,
expectSchema: 0,
},
{
h: customBuckets,
maxSchema: -1,
expectSchema: histogram.CustomBucketsSchema,
},
}
resApp := &collectResultAppender{}
for _, c := range cases {
for _, floatHisto := range []bool{true, false} {
t.Run(fmt.Sprintf("floatHistogram=%t", floatHisto), func(t *testing.T) {
app := &maxSchemaAppender{Appender: resApp, maxSchema: c.maxSchema}
ts := int64(10 * time.Minute / time.Millisecond)
lbls := labels.FromStrings("__name__", "sparse_histogram_series")
var err error
if floatHisto {
fh := c.h.Copy().ToFloat(nil)
_, err = app.AppendHistogram(0, lbls, ts, nil, fh)
require.Equal(t, c.expectSchema, fh.Schema)
require.NoError(t, err)
} else {
h := c.h.Copy()
_, err = app.AppendHistogram(0, lbls, ts, h, nil)
require.Equal(t, c.expectSchema, h.Schema)
require.NoError(t, err)
}
require.NoError(t, app.Commit())
})
}
}
}