[exporter/datadog] Remove Docker hostname detector (#11834)

* [exporter/datadog] Remove Docker hostname detector

* Add Changelog entry

* make gotidy

CHANGELOG.md

@@ -8,6 +8,7 @@
   - If users were disabling this feature gate, they may have to update
     monitoring for a few Kubernetes cpu metrics. For more details see [feature-gate-configurations](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/v0.54.0/receiver/k8sclusterreceiver#feature-gate-configurations).
 - `prometheusexporter`: Automatically rename metrics with units to follow Prometheus naming convention (#8950)
+- `datadogexporter`: (Under `exporter.datadog.hostname.preview` feature gate) Remove `docker` hostname detector (#11834)
 
 ### 🚩 Deprecations 🚩
 

exporter/datadogexporter/go.mod

@@ -29,7 +29,6 @@ require (
 
 require (
 	cloud.google.com/go/compute v1.6.1 // indirect
-	github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect
 	github.com/DataDog/datadog-agent/pkg/obfuscate v0.38.0-rc.1 // indirect
 	github.com/DataDog/datadog-agent/pkg/remoteconfig/state v0.38.0-rc.1 // indirect
 	github.com/DataDog/datadog-go/v5 v5.1.0 // indirect
@@ -40,10 +39,6 @@ require (
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dgraph-io/ristretto v0.1.0 // indirect
-	github.com/docker/distribution v2.8.1+incompatible // indirect
-	github.com/docker/docker v20.10.17+incompatible // indirect
-	github.com/docker/go-connections v0.4.0 // indirect
-	github.com/docker/go-units v0.4.0 // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
 	github.com/emicklei/go-restful v2.9.5+incompatible // indirect
 	github.com/felixge/httpsnoop v1.0.2 // indirect
@@ -74,8 +69,6 @@ require (
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/open-telemetry/opentelemetry-collector-contrib/internal/common v0.54.0 // indirect
-	github.com/opencontainers/go-digest v1.0.0 // indirect
-	github.com/opencontainers/image-spec v1.0.2 // indirect
 	github.com/openshift/api v0.0.0-20210521075222-e273a339932a // indirect
 	github.com/openshift/client-go v0.0.0-20210521082421-73d9475a9142 // indirect
 	github.com/philhofer/fwd v1.1.1 // indirect
@@ -85,7 +78,6 @@ require (
 	github.com/rs/cors v1.8.2 // indirect
 	github.com/secure-systems-lab/go-securesystemslib v0.3.1 // indirect
 	github.com/shirou/gopsutil/v3 v3.22.5 // indirect
-	github.com/sirupsen/logrus v1.8.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stretchr/objx v0.4.0 // indirect
 	github.com/theupdateframework/go-tuf v0.3.0 // indirect

exporter/datadogexporter/internal/metadata/host.go

@@ -24,7 +24,6 @@ import (
 	"go.uber.org/zap"
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/metadata/internal/azure"
-	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/metadata/internal/docker"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/metadata/internal/ec2"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/metadata/internal/ecs"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/metadata/internal/gcp"
@@ -51,11 +50,6 @@ func init() {
 }
 
 func buildPreviewProvider(set component.TelemetrySettings, configHostname string) (source.Provider, error) {
-	dockerProvider, err := docker.NewProvider()
-	if err != nil {
-		return nil, err
-	}
-
 	ecs, err := ecs.NewProvider(set)
 	if err != nil {
 		return nil, fmt.Errorf("failed to build ECS Fargate provider: %w", err)
@@ -94,10 +88,9 @@ func buildPreviewProvider(set component.TelemetrySettings, configHostname string
 			"ec2":        ec2Provider,
 			"gcp":        gcpProvider,
 			"kubernetes": k8sProvider,
-			"docker":     dockerProvider,
 			"system":     system.NewProvider(set.Logger),
 		},
-		[]string{"config", "azure", "ecs", "ec2", "gcp", "kubernetes", "docker", "system"},
+		[]string{"config", "azure", "ecs", "ec2", "gcp", "kubernetes", "system"},
 	)
 
 	if err != nil {