Fix issue where Prometheus SD config cannot be parsed

go.sum

@@ -10,6 +10,7 @@ cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6T
 cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw=
 cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
 cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.56.0 h1:WRz29PgAsVEyPSDHyk+0fpEkwEFyfhHn+JbksT6gIL4=
 cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
@@ -511,6 +512,7 @@ github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+
 github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg=
+github.com/googleapis/gax-go/v2 v2.0.5 h1:sjZBwGj9Jlw33ImPtvFviGYvseOtDM7hkSKB7+Tv3SM=
 github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
 github.com/googleapis/gnostic v0.0.0-20170729233727-0c5108395e2d/go.mod h1:sJBsCZ4ayReDTBIg8b9dl28c5xFWyhBTVRp3pOg5EKY=
 github.com/googleapis/gnostic v0.1.0/go.mod h1:sJBsCZ4ayReDTBIg8b9dl28c5xFWyhBTVRp3pOg5EKY=
@@ -1130,6 +1132,7 @@ go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
+go.uber.org/atomic v1.6.0 h1:Ezj3JGmsOnG1MoRWQkPBsKLe9DwWD9QeXzTRzzldNVk=
 go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
@@ -1435,6 +1438,7 @@ google.golang.org/api v0.15.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsb
 google.golang.org/api v0.17.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
 google.golang.org/api v0.18.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
 google.golang.org/api v0.20.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
+google.golang.org/api v0.29.0 h1:BaiDisFir8O4IJxvAabCGGkQ6yCJegNQqSVoYUNAnbk=
 google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=

receiver/prometheusreceiver/factory.go

@@ -19,6 +19,7 @@ import (
 	"errors"
 	"fmt"
 
+	_ "github.com/prometheus/prometheus/discovery/install" // init() of this package registers service discovery impl.
 	"github.com/spf13/viper"
 	"gopkg.in/yaml.v2"
 

receiver/prometheusreceiver/factory_test.go

@@ -16,13 +16,16 @@ package prometheusreceiver
 
 import (
 	"context"
+	"path"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
 	"go.uber.org/zap"
 
 	"go.opentelemetry.io/collector/component"
+	"go.opentelemetry.io/collector/component/componenttest"
 	"go.opentelemetry.io/collector/config/configcheck"
+	"go.opentelemetry.io/collector/config/configtest"
 )
 
 func TestCreateDefaultConfig(t *testing.T) {
@@ -41,3 +44,14 @@ func TestCreateReceiver(t *testing.T) {
 	assert.Equal(t, err, errNilScrapeConfig)
 	assert.Nil(t, mReceiver)
 }
+
+func TestFactoryCanParseServiceDiscoveryConfigs(t *testing.T) {
+	factories, err := componenttest.ExampleComponents()
+	assert.NoError(t, err)
+
+	factory := NewFactory()
+	factories.Receivers[typeStr] = factory
+	_, err = configtest.LoadConfigFile(t, path.Join(".", "testdata", "config_sd.yaml"), factories)
+
+	assert.NoError(t, err)
+}

receiver/prometheusreceiver/testdata/config_sd.yaml

@@ -0,0 +1,85 @@
+receivers:
+  prometheus:
+    config:
+      scrape_configs:
+      - job_name: file
+        file_sd_configs:
+        - files:
+          - 'dummy.json'
+      - job_name: k8s
+        kubernetes_sd_configs:
+        - role: node
+      - job_name: ec2
+        ec2_sd_configs:
+        - region: us-west-2
+      - job_name: gce
+        gce_sd_configs:
+        - project: my-project
+          zone: my-zone
+      - job_name: dns
+        dns_sd_configs:
+        - names:
+          - name1
+      - job_name: openstack
+        openstack_sd_configs:
+        - role: hypervisor
+          region: region
+      - job_name: hetzner
+        hetzner_sd_configs:
+        - role: robot
+      - job_name: marathon
+        marathon_sd_configs:
+        - servers:
+          - server1
+      - job_name: nerve
+        nerve_sd_configs:
+        - servers:
+          - server1
+          paths:
+          - /path1
+      - job_name: serverset
+        serverset_sd_configs:
+          - servers:
+            - server1
+            paths:
+            - /path1
+      - job_name: triton
+        triton_sd_configs:
+        - account: account
+          dns_suffix: suffix
+          endpoint: endpoint
+      - job_name: eureka
+        eureka_sd_configs:
+        - server: http://server1
+      - job_name: azure
+        azure_sd_configs:
+        - subscription_id: subscription
+          tenant_id: tenant
+          client_id: client
+          client_secret: secret
+      - job_name: consul
+        consul_sd_configs:
+        - server: server1
+      - job_name: digitalocean
+        digitalocean_sd_configs:
+        - basic_auth:
+            username: username
+            password: password
+      - job_name: dockerswarm_sd_config
+        dockerswarm_sd_configs:
+        - host: host
+          role: nodes
+
+
+processors:
+  exampleprocessor:
+
+exporters:
+  exampleexporter:
+
+service:
+  pipelines:
+    traces:
+      receivers: [prometheus]
+      processors: [exampleprocessor]
+      exporters: [exampleexporter]