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prometheus/discovery/xds/kuma_test.go

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// Copyright 2021 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 xds
import (
"context"
"errors"
"fmt"
"testing"
"time"
v3 "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/model"
"github.com/stretchr/testify/require"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"gopkg.in/yaml.v2"
"github.com/prometheus/prometheus/discovery/targetgroup"
)
var (
kumaConf = sdConf
testKumaMadsV1Resources = []*MonitoringAssignment{
{
Mesh: "metrics",
Service: "prometheus",
Targets: []*MonitoringAssignment_Target{
{
Name: "prometheus-01",
Scheme: "http",
Address: "10.1.4.32:9090",
MetricsPath: "/custom-metrics",
Labels: map[string]string{
"commit_hash": "620506a88",
},
},
{
Name: "prometheus-02",
Scheme: "http",
Address: "10.1.4.33:9090",
Labels: map[string]string{
"commit_hash": "3513bba00",
},
},
},
Labels: map[string]string{
"kuma.io/zone": "us-east-1",
"team": "infra",
},
},
{
Mesh: "metrics",
Service: "grafana",
Targets: []*MonitoringAssignment_Target{},
Labels: map[string]string{
"kuma.io/zone": "us-east-1",
"team": "infra",
},
},
{
Mesh: "data",
Service: "elasticsearch",
Targets: []*MonitoringAssignment_Target{
{
Name: "elasticsearch-01",
Scheme: "http",
Address: "10.1.1.1",
Labels: map[string]string{
"role": "ml",
},
},
},
},
}
)
func getKumaMadsV1DiscoveryResponse(resources ...*MonitoringAssignment) (*v3.DiscoveryResponse, error) {
serialized := make([]*anypb.Any, len(resources))
for i, res := range resources {
data, err := proto.Marshal(res)
if err != nil {
return nil, err
}
serialized[i] = &anypb.Any{
TypeUrl: KumaMadsV1ResourceTypeURL,
Value: data,
}
}
return &v3.DiscoveryResponse{
TypeUrl: KumaMadsV1ResourceTypeURL,
Resources: serialized,
}, nil
}
func newKumaTestHTTPDiscovery(c KumaSDConfig) (*fetchDiscovery, error) {
kd, err := NewKumaHTTPDiscovery(&c, nopLogger, prometheus.NewRegistry())
if err != nil {
return nil, err
}
pd, ok := kd.(*fetchDiscovery)
if !ok {
return nil, errors.New("not a fetchDiscovery")
}
return pd, nil
}
func TestKumaMadsV1ResourceParserInvalidTypeURL(t *testing.T) {
resources := make([]*anypb.Any, 0)
groups, err := kumaMadsV1ResourceParser(resources, "type.googleapis.com/some.api.v1.Monitoring")
require.Nil(t, groups)
require.Error(t, err)
}
func TestKumaMadsV1ResourceParserEmptySlice(t *testing.T) {
resources := make([]*anypb.Any, 0)
groups, err := kumaMadsV1ResourceParser(resources, KumaMadsV1ResourceTypeURL)
require.Empty(t, groups)
require.NoError(t, err)
}
func TestKumaMadsV1ResourceParserValidResources(t *testing.T) {
res, err := getKumaMadsV1DiscoveryResponse(testKumaMadsV1Resources...)
require.NoError(t, err)
targets, err := kumaMadsV1ResourceParser(res.Resources, KumaMadsV1ResourceTypeURL)
require.NoError(t, err)
require.Len(t, targets, 3)
expectedTargets := []model.LabelSet{
{
"__address__": "10.1.4.32:9090",
"__metrics_path__": "/custom-metrics",
"__scheme__": "http",
"instance": "prometheus-01",
"__meta_kuma_mesh": "metrics",
"__meta_kuma_service": "prometheus",
"__meta_kuma_label_team": "infra",
"__meta_kuma_label_kuma_io_zone": "us-east-1",
"__meta_kuma_label_commit_hash": "620506a88",
"__meta_kuma_dataplane": "prometheus-01",
},
{
"__address__": "10.1.4.33:9090",
"__metrics_path__": "",
"__scheme__": "http",
"instance": "prometheus-02",
"__meta_kuma_mesh": "metrics",
"__meta_kuma_service": "prometheus",
"__meta_kuma_label_team": "infra",
"__meta_kuma_label_kuma_io_zone": "us-east-1",
"__meta_kuma_label_commit_hash": "3513bba00",
"__meta_kuma_dataplane": "prometheus-02",
},
{
"__address__": "10.1.1.1",
"__metrics_path__": "",
"__scheme__": "http",
"instance": "elasticsearch-01",
"__meta_kuma_mesh": "data",
"__meta_kuma_service": "elasticsearch",
"__meta_kuma_label_role": "ml",
"__meta_kuma_dataplane": "elasticsearch-01",
},
}
require.Equal(t, expectedTargets, targets)
}
func TestKumaMadsV1ResourceParserInvalidResources(t *testing.T) {
data, err := protoJSONMarshalOptions.Marshal(&MonitoringAssignment_Target{})
require.NoError(t, err)
resources := []*anypb.Any{{
TypeUrl: KumaMadsV1ResourceTypeURL,
Value: data,
}}
groups, err := kumaMadsV1ResourceParser(resources, KumaMadsV1ResourceTypeURL)
require.Nil(t, groups)
require.Error(t, err)
require.Contains(t, err.Error(), "cannot parse")
}
func TestNewKumaHTTPDiscovery(t *testing.T) {
kd, err := newKumaTestHTTPDiscovery(kumaConf)
require.NoError(t, err)
require.NotNil(t, kd)
resClient, ok := kd.client.(*HTTPResourceClient)
require.True(t, ok)
require.Equal(t, kumaConf.Server, resClient.Server())
require.Equal(t, KumaMadsV1ResourceTypeURL, resClient.ResourceTypeURL())
require.NotEmpty(t, resClient.ID())
require.Equal(t, KumaMadsV1ResourceType, resClient.config.ResourceType)
}
func TestKumaHTTPDiscoveryRefresh(t *testing.T) {
s := createTestHTTPServer(t, func(request *v3.DiscoveryRequest) (*v3.DiscoveryResponse, error) {
if request.VersionInfo == "1" {
return nil, nil
}
res, err := getKumaMadsV1DiscoveryResponse(testKumaMadsV1Resources...)
require.NoError(t, err)
res.VersionInfo = "1"
res.Nonce = "abc"
return res, nil
})
defer s.Close()
cfgString := fmt.Sprintf(`
---
server: %s
refresh_interval: 10s
tls_config:
insecure_skip_verify: true
`, s.URL)
var cfg KumaSDConfig
require.NoError(t, yaml.Unmarshal([]byte(cfgString), &cfg))
kd, err := newKumaTestHTTPDiscovery(cfg)
require.NoError(t, err)
require.NotNil(t, kd)
ch := make(chan []*targetgroup.Group, 1)
kd.poll(context.Background(), ch)
groups := <-ch
require.Len(t, groups, 1)
targets := groups[0].Targets
require.Len(t, targets, 3)
expectedTargets := []model.LabelSet{
{
"__address__": "10.1.4.32:9090",
"__metrics_path__": "/custom-metrics",
"__scheme__": "http",
"instance": "prometheus-01",
"__meta_kuma_mesh": "metrics",
"__meta_kuma_service": "prometheus",
"__meta_kuma_label_team": "infra",
"__meta_kuma_label_kuma_io_zone": "us-east-1",
"__meta_kuma_label_commit_hash": "620506a88",
"__meta_kuma_dataplane": "prometheus-01",
},
{
"__address__": "10.1.4.33:9090",
"__metrics_path__": "",
"__scheme__": "http",
"instance": "prometheus-02",
"__meta_kuma_mesh": "metrics",
"__meta_kuma_service": "prometheus",
"__meta_kuma_label_team": "infra",
"__meta_kuma_label_kuma_io_zone": "us-east-1",
"__meta_kuma_label_commit_hash": "3513bba00",
"__meta_kuma_dataplane": "prometheus-02",
},
{
"__address__": "10.1.1.1",
"__metrics_path__": "",
"__scheme__": "http",
"instance": "elasticsearch-01",
"__meta_kuma_mesh": "data",
"__meta_kuma_service": "elasticsearch",
"__meta_kuma_label_role": "ml",
"__meta_kuma_dataplane": "elasticsearch-01",
},
}
require.Equal(t, expectedTargets, targets)
// Should skip the next update.
ctx, cancel := context.WithCancel(context.Background())
go func() {
time.Sleep(1 * time.Second)
cancel()
}()
kd.poll(ctx, ch)
select {
case <-ctx.Done():
return
case <-ch:
require.Fail(t, "no update expected")
}
}
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