[FEATURE] adding otlp endpoint

cmd/thanos/receive.go

@@ -290,6 +290,8 @@ func runReceive(
 
 		AsyncForwardWorkerCount: conf.asyncForwardWorkerCount,
 		ReplicationProtocol:     receive.ReplicationProtocol(conf.replicationProtocol),
+		OtlpEnableTargetInfo:    conf.otlpEnableTargetInfo,
+		OtlpResourceAttributes:  conf.otlpResourceAttributes,
 	})
 
 	grpcProbe := prober.NewGRPC()
@@ -909,6 +911,8 @@ type receiveConfig struct {
 
 	headExpandedPostingsCacheSize            uint64
 	compactedBlocksExpandedPostingsCacheSize uint64
+	otlpEnableTargetInfo                     bool
+	otlpResourceAttributes                   []string
 }
 
 func (rc *receiveConfig) registerFlag(cmd extkingpin.FlagClause) {
@@ -1066,6 +1070,9 @@ func (rc *receiveConfig) registerFlag(cmd extkingpin.FlagClause) {
 	cmd.Flag("receive.limits-config-reload-timer", "Minimum amount of time to pass for the limit configuration to be reloaded. Helps to avoid excessive reloads.").
 		Default("1s").Hidden().DurationVar(&rc.limitsConfigReloadTimer)
 
+	cmd.Flag("receive.otlp-enable-target-info", "Enables target information in OTLP metrics ingested by Receive. If enabled, it converts the resource to the target info metric").Default("true").BoolVar(&rc.otlpEnableTargetInfo)
+	cmd.Flag("receive.otlp-promote-resource-attributes", "(Repeatable) Resource attributes to include in OTLP metrics ingested by Receive.").Default("").StringsVar(&rc.otlpResourceAttributes)
+
 	rc.featureList = cmd.Flag("enable-feature", "Comma separated experimental feature names to enable. The current list of features is "+metricNamesFilter+".").Default("").Strings()
 }
 

docs/components/receive.md

@@ -331,7 +331,7 @@ Please see the metric `thanos_receive_forward_delay_seconds` to see if you need
 
 The following formula is used for calculating quorum:
 
-```go mdox-exec="sed -n '1015,1025p' pkg/receive/handler.go"
+```go mdox-exec="sed -n '1029,1039p' pkg/receive/handler.go"
 // writeQuorum returns minimum number of replicas that has to confirm write success before claiming replication success.
 func (h *Handler) writeQuorum() int {
 	// NOTE(GiedriusS): this is here because otherwise RF=2 doesn't make sense as all writes
@@ -458,6 +458,13 @@ Flags:
                                  configuration. If it's empty AND hashring
                                  configuration was provided, it means that
                                  receive will run in RoutingOnly mode.
+      --receive.otlp-enable-target-info
+                                 Enables target information in OTLP metrics
+                                 ingested by Receive. If enabled, it converts
+                                 the resource to the target info metric
+      --receive.otlp-promote-resource-attributes= ...
+                                 (Repeatable) Resource attributes to include in
+                                 OTLP metrics ingested by Receive.
       --receive.relabel-config=<content>
                                  Alternative to 'receive.relabel-config-file'
                                  flag (mutually exclusive). Content of YAML file

go.mod

@@ -114,8 +114,55 @@ require (
 	github.com/Azure/azure-sdk-for-go/sdk/internal v1.10.0 // indirect
 	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.3.0 // indirect
 	github.com/AzureAD/microsoft-authentication-library-for-go v1.2.2 // indirect
-	github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.32.3 // indirect
+)
+
+require (
+	go.opentelemetry.io/collector/pdata v1.14.1
+	go.opentelemetry.io/collector/semconv v0.108.1
+)
+
+require github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165 // indirect
+
+require (
 	github.com/HdrHistogram/hdrhistogram-go v1.1.2 // indirect
+	github.com/bboreham/go-loser v0.0.0-20230920113527-fcc2c21820a3 // indirect
+	github.com/cilium/ebpf v0.11.0 // indirect
+	github.com/containerd/cgroups/v3 v3.0.3 // indirect
+	github.com/docker/go-units v0.5.0 // indirect
+	github.com/elastic/go-licenser v0.3.1 // indirect
+	github.com/go-ini/ini v1.67.0 // indirect
+	github.com/go-openapi/runtime v0.27.1 // indirect
+	github.com/goccy/go-json v0.10.3 // indirect
+	github.com/godbus/dbus/v5 v5.0.4 // indirect
+	github.com/golang-jwt/jwt/v5 v5.2.1 // indirect
+	github.com/google/s2a-go v0.1.8 // indirect
+	github.com/huaweicloud/huaweicloud-sdk-go-obs v3.23.3+incompatible // indirect
+	github.com/jcchavezs/porto v0.1.0 // indirect
+	github.com/leesper/go_rng v0.0.0-20190531154944-a612b043e353 // indirect
+	github.com/mdlayher/socket v0.4.1 // indirect
+	github.com/mdlayher/vsock v1.2.1 // indirect
+	github.com/metalmatze/signal v0.0.0-20210307161603-1c9aa721a97a // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/onsi/ginkgo v1.16.5 // indirect
+	github.com/opencontainers/runtime-spec v1.0.2 // indirect
+	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
+	github.com/sercand/kuberesolver/v4 v4.0.0 // indirect
+	github.com/zhangyunhao116/umap v0.0.0-20221211160557-cb7705fafa39 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.49.0 // indirect
+	go.opentelemetry.io/contrib/propagators/ot v1.29.0 // indirect
+	go4.org/unsafe/assume-no-moving-gc v0.0.0-20230525183740-e7c30c78aeb2 // indirect
+	golang.org/x/lint v0.0.0-20210508222113-6edffad5e616 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240827150818-7e3bb234dfed // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240903143218-8af14fe29dc1 // indirect
+	k8s.io/apimachinery v0.31.1 // indirect
+	k8s.io/client-go v0.31.0 // indirect
+	k8s.io/klog/v2 v2.130.1 // indirect
+	k8s.io/utils v0.0.0-20240711033017-18e509b52bc8 // indirect
+	zenhack.net/go/util v0.0.0-20230414204917-531d38494cf5 // indirect
+)
+
+require (
+	github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.32.3 // indirect
 	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
 	github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a // indirect
 	github.com/aliyun/aliyun-oss-go-sdk v2.2.2+incompatible // indirect
@@ -134,24 +181,17 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/sts v1.16.1 // indirect
 	github.com/aws/smithy-go v1.11.1 // indirect
 	github.com/baidubce/bce-sdk-go v0.9.111 // indirect
-	github.com/bboreham/go-loser v0.0.0-20230920113527-fcc2c21820a3 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/chromedp/sysutil v1.0.0 // indirect
-	github.com/cilium/ebpf v0.11.0 // indirect
 	github.com/clbanning/mxj v1.8.4 // indirect
-	github.com/containerd/cgroups/v3 v3.0.3 // indirect
 	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dennwc/varint v1.0.0 // indirect
-	github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165 // indirect
-	github.com/docker/go-units v0.5.0 // indirect
 	github.com/edsrzf/mmap-go v1.1.0 // indirect
-	github.com/elastic/go-licenser v0.3.1 // indirect
 	github.com/elastic/go-sysinfo v1.8.1 // indirect
 	github.com/elastic/go-windows v1.0.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/go-ini/ini v1.67.0 // indirect
 	github.com/go-logfmt/logfmt v0.6.0 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
@@ -161,56 +201,41 @@ require (
 	github.com/go-openapi/jsonpointer v0.20.2 // indirect
 	github.com/go-openapi/jsonreference v0.20.4 // indirect
 	github.com/go-openapi/loads v0.21.5 // indirect
-	github.com/go-openapi/runtime v0.27.1 // indirect
 	github.com/go-openapi/spec v0.20.14 // indirect
 	github.com/go-openapi/swag v0.22.9 // indirect
 	github.com/go-openapi/validate v0.23.0 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/gobwas/ws v1.2.1 // indirect
-	github.com/goccy/go-json v0.10.3 // indirect
-	github.com/godbus/dbus/v5 v5.0.4 // indirect
 	github.com/gofrs/flock v0.8.1 // indirect
 	github.com/gogo/googleapis v1.4.0 // indirect
-	github.com/golang-jwt/jwt/v5 v5.2.1 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/google/pprof v0.0.0-20240827171923-fa2c70bbbfe5 // indirect
-	github.com/google/s2a-go v0.1.8 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.4 // indirect
 	github.com/googleapis/gax-go/v2 v2.13.0 // indirect
 	github.com/gorilla/mux v1.8.0 // indirect
 	github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.22.0 // indirect
-	github.com/huaweicloud/huaweicloud-sdk-go-obs v3.23.3+incompatible // indirect
-	github.com/jcchavezs/porto v0.1.0 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/joeshaw/multierror v0.0.0-20140124173710-69b34d4ec901 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/julienschmidt/httprouter v1.3.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
-	github.com/leesper/go_rng v0.0.0-20190531154944-a612b043e353 // indirect
 	github.com/lightstep/lightstep-tracer-common/golang/gogo v0.0.0-20210210170715-a8dfcb80d3a7 // indirect
 	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-runewidth v0.0.13 // indirect
-	github.com/mdlayher/socket v0.4.1 // indirect
-	github.com/mdlayher/vsock v1.2.1 // indirect
-	github.com/metalmatze/signal v0.0.0-20210307161603-1c9aa721a97a // indirect
 	github.com/minio/md5-simd v1.1.2 // indirect
 	github.com/minio/minio-go/v7 v7.0.80 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/mozillazg/go-httpheader v0.2.1 // indirect
-	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/ncw/swift v1.0.53 // indirect
-	github.com/onsi/ginkgo v1.16.5 // indirect
-	github.com/opencontainers/runtime-spec v1.0.2 // indirect
 	github.com/opentracing-contrib/go-grpc v0.0.0-20210225150812-73cb765af46e // indirect
 	github.com/opentracing-contrib/go-stdlib v1.0.0 // indirect
 	github.com/oracle/oci-go-sdk/v65 v65.41.1 // indirect
-	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
 	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
@@ -219,7 +244,6 @@ require (
 	github.com/rivo/uniseg v0.2.0 // indirect
 	github.com/rs/xid v1.6.0 // indirect
 	github.com/santhosh-tekuri/jsonschema v1.2.4 // indirect
-	github.com/sercand/kuberesolver/v4 v4.0.0 // indirect
 	github.com/shirou/gopsutil/v3 v3.22.9 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
@@ -230,40 +254,26 @@ require (
 	github.com/weaveworks/promrus v1.2.0 // indirect
 	github.com/yuin/gopher-lua v0.0.0-20210529063254-f4c35e4016d9 // indirect
 	github.com/yusufpapurcu/wmi v1.2.2 // indirect
-	github.com/zhangyunhao116/umap v0.0.0-20221211160557-cb7705fafa39 // indirect
 	go.elastic.co/apm/module/apmhttp v1.15.0 // indirect
 	go.elastic.co/fastjson v1.1.0 // indirect
 	go.mongodb.org/mongo-driver v1.14.0 // indirect
 	go.opencensus.io v0.24.0 // indirect
-	go.opentelemetry.io/collector/pdata v1.14.1 // indirect
-	go.opentelemetry.io/collector/semconv v0.108.1 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.49.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0 // indirect
 	go.opentelemetry.io/contrib/propagators/aws v1.29.0 // indirect
 	go.opentelemetry.io/contrib/propagators/b3 v1.29.0 // indirect
 	go.opentelemetry.io/contrib/propagators/jaeger v1.29.0 // indirect
-	go.opentelemetry.io/contrib/propagators/ot v1.29.0 // indirect
 	go.opentelemetry.io/otel/metric v1.31.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	go4.org/unsafe/assume-no-moving-gc v0.0.0-20230525183740-e7c30c78aeb2 // indirect
 	golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 // indirect
-	golang.org/x/lint v0.0.0-20210508222113-6edffad5e616 // indirect
 	golang.org/x/mod v0.21.0 // indirect
 	golang.org/x/oauth2 v0.23.0 // indirect
 	golang.org/x/sys v0.28.0 // indirect
 	golang.org/x/tools v0.24.0 // indirect
 	gonum.org/v1/gonum v0.15.0 // indirect
 	google.golang.org/api v0.195.0 // indirect
 	google.golang.org/genproto v0.0.0-20240823204242-4ba0660f739c // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240827150818-7e3bb234dfed // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240903143218-8af14fe29dc1 // indirect
 	howett.net/plist v0.0.0-20181124034731-591f970eefbb // indirect
-	k8s.io/apimachinery v0.31.1 // indirect
-	k8s.io/client-go v0.31.0 // indirect
-	k8s.io/klog/v2 v2.130.1 // indirect
-	k8s.io/utils v0.0.0-20240711033017-18e509b52bc8 // indirect
-	zenhack.net/go/util v0.0.0-20230414204917-531d38494cf5 // indirect
 )
 
 replace (

pkg/errutil/multierror.go

@@ -71,6 +71,15 @@ func (es NonNilMultiError) Cause() error {
 	return es.getCause()
 }
 
+func (es NonNilMultiError) Is(target error) bool {
+	for _, err := range es {
+		if errors.Is(err, target) {
+			return true
+		}
+	}
+	return false
+}
+
 func (es NonNilMultiError) getCause() NonNilMultiRootError {
 	var causes []error
 	for _, err := range es {

pkg/receive/handler.go

@@ -116,6 +116,8 @@ type Options struct {
 	Limiter                 *Limiter
 	AsyncForwardWorkerCount uint
 	ReplicationProtocol     ReplicationProtocol
+	OtlpEnableTargetInfo    bool
+	OtlpResourceAttributes  []string
 }
 
 // Handler serves a Prometheus remote write receiving HTTP endpoint.
@@ -275,6 +277,18 @@ func NewHandler(logger log.Logger, o *Options) *Handler {
 		),
 	)
 
+	h.router.Post(
+		"/api/v1/otlp",
+		instrf(
+			"otlp",
+			readyf(
+				middleware.RequestID(
+					http.HandlerFunc(h.receiveOTLPHTTP),
+				),
+			),
+		),
+	)
+
 	statusAPI := statusapi.New(statusapi.Options{
 		GetStats: h.getStats,
 		Registry: h.options.Registry,