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lib/protoparser: adds opentelemetry parser
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app/{vmagent,vminsert}: adds opentelemetry ingestion path

Adds ability to ingest data with opentelemetry protocol
protobuf and json encoding is supported
data converted into prometheus protobuf timeseries
each data type has own converter and it may produce multiple timeseries
from single datapoint (for summary and histogram).
only cumulative aggregationFamily is supported for sum(prometheus
counter) and histogram.

Apply suggestions from code review

Co-authored-by: Roman Khavronenko <roman@victoriametrics.com>

updates deps

fixes tests
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f41gh7 committed Dec 28, 2022
1 parent c3362e3 commit db514d9
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13 changes: 12 additions & 1 deletion README.md
Expand Up @@ -65,7 +65,8 @@ VictoriaMetrics has the following prominent features:
* [Arbitrary CSV data](#how-to-import-csv-data).
* [Native binary format](#how-to-import-data-in-native-format).
* [DataDog agent or DogStatsD](#how-to-send-data-from-datadog-agent).
* It supports metrics [relabeling](#relabeling).
* [OpenTelemetry format](#sending-data-via-opentelemetry-http).
* It supports metrics' relabeling. See [these docs](#relabeling) for details.
* It can deal with [high cardinality issues](https://docs.victoriametrics.com/FAQ.html#what-is-high-cardinality) and [high churn rate](https://docs.victoriametrics.com/FAQ.html#what-is-high-churn-rate) issues via [series limiter](#cardinality-limiter).
* It ideally works with big amounts of time series data from APM, Kubernetes, IoT sensors, connected cars, industrial telemetry, financial data and various [Enterprise workloads](https://docs.victoriametrics.com/enterprise.html).
* It has open source [cluster version](https://github.com/VictoriaMetrics/VictoriaMetrics/tree/cluster).
Expand Down Expand Up @@ -1201,6 +1202,16 @@ Note that it could be required to flush response cache after importing historica

VictoriaMetrics also may scrape Prometheus targets - see [these docs](#how-to-scrape-prometheus-exporters-such-as-node-exporter).

## Sending data via opentelemetry http

VictoriaMetrics supports data ingestion via [opentelemetry protocol](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/datamodel.md#opentelemetry-protocol-data-model) with `protobuf` and `json` encoding
via `/opentemetry/api/v1/push` path. For example, following command ingests a single gauge metric:
```bash
curl -XPOST -H 'Content-Type: application/json' localhost:8428/opentelemetry/api/v1/push -g -d '{"resourceMetrics":[{"resource":{"attributes":[{"key":"job", "value":{"stringValue":"vm"}}]}, "scopeMetrics":[{"metrics":[{"name":"my-gauge", "gauge":{"dataPoints":[{"attributes":[{"key":"label1", "value":{"stringValue":"value1"}}], "timeUnixNano":"15000000000", "asInt":"15"}]}}]}]}]}'
```
By default, VictoriaMetrics expects `protobuf`-encoded requests. For sending `json`-encoded requests set HTTP header `Content-Type: application/json`.
VictoriaMetrics accepts data with gzip compression, set HTTP header `Content-Encoding: gzip` for compressed data.

## Relabeling

VictoriaMetrics supports Prometheus-compatible relabeling for all the ingested metrics if `-relabelConfig` command-line flag points
Expand Down
31 changes: 24 additions & 7 deletions app/victoria-metrics/main_test.go
Expand Up @@ -42,6 +42,7 @@ const (
testOpenTSDBWriteHTTPPath = "http://127.0.0.1" + testOpenTSDBHTTPListenAddr + "/api/put"
testPromWriteHTTPPath = "http://127.0.0.1" + testHTTPListenAddr + "/api/v1/write"
testHealthHTTPPath = "http://127.0.0.1" + testHTTPListenAddr + "/health"
testOTLPWriteHTTPPath = "http://127.0.0.1" + testHTTPListenAddr + "/opentelemetry/api/v1/push"
)

const (
Expand Down Expand Up @@ -208,7 +209,7 @@ func testWrite(t *testing.T) {
t.Errorf("error compressing %v %s", r, err)
t.Fail()
}
httpWrite(t, testPromWriteHTTPPath, test.InsertQuery, bytes.NewBuffer(data))
httpWrite(t, testPromWriteHTTPPath, test.InsertQuery, bytes.NewBuffer(data), 204)
}
})

Expand All @@ -217,7 +218,7 @@ func testWrite(t *testing.T) {
test := x
t.Run(test.Name, func(t *testing.T) {
t.Parallel()
httpWrite(t, testWriteHTTPPath, test.InsertQuery, bytes.NewBufferString(strings.Join(test.Data, "\n")))
httpWrite(t, testWriteHTTPPath, test.InsertQuery, bytes.NewBufferString(strings.Join(test.Data, "\n")), 204)
})
}
})
Expand Down Expand Up @@ -245,14 +246,25 @@ func testWrite(t *testing.T) {
t.Run(test.Name, func(t *testing.T) {
t.Parallel()
logger.Infof("writing %s", test.Data)
httpWrite(t, testOpenTSDBWriteHTTPPath, test.InsertQuery, bytes.NewBufferString(strings.Join(test.Data, "\n")))
httpWrite(t, testOpenTSDBWriteHTTPPath, test.InsertQuery, bytes.NewBufferString(strings.Join(test.Data, "\n")), 204)
})
}
})
t.Run("opentelemetry", func(t *testing.T) {
for _, x := range readIn("opentelemetry", t, insertionTime) {
test := x
t.Run(test.Name, func(t *testing.T) {
t.Parallel()
httpWrite(t, testOTLPWriteHTTPPath, test.InsertQuery, bytes.NewBufferString(strings.Join(test.Data, "\n")), 200, func(r *http.Request) {
r.Header.Set("Content-Type", "application/json")
})
})
}
})
}

func testRead(t *testing.T) {
for _, engine := range []string{"prometheus", "graphite", "opentsdb", "influxdb", "opentsdbhttp"} {
for _, engine := range []string{"prometheus", "graphite", "opentsdb", "influxdb", "opentsdbhttp", "opentelemetry"} {
t.Run(engine, func(t *testing.T) {
for _, x := range readIn(engine, t, insertionTime) {
test := x
Expand Down Expand Up @@ -323,13 +335,18 @@ func readIn(readFor string, t *testing.T, insertTime time.Time) []test {
return tt
}

func httpWrite(t *testing.T, address, query string, r io.Reader) {
func httpWrite(t *testing.T, address, query string, r io.Reader, wantCode int, reqOptions ...func(r *http.Request)) {
t.Helper()
s := newSuite(t)
resp, err := http.Post(address+query, "", r)
req, err := http.NewRequest("POST", address+query, r)
s.noError(err)
for _, reqOption := range reqOptions {
reqOption(req)
}
resp, err := http.DefaultClient.Do(req)
s.noError(err)
s.noError(resp.Body.Close())
s.equalInt(resp.StatusCode, 204)
s.equalInt(resp.StatusCode, wantCode)
}

func tcpWrite(t *testing.T, address string, data string) {
Expand Down
21 changes: 21 additions & 0 deletions app/victoria-metrics/testdata/opentelemetry/basic.json
@@ -0,0 +1,21 @@
{
"name": "ingest all types",
"query": ["/api/v1/export?match={__name__=~'(my-gauge|my-histogram|my-sum|my-summary).*'}"],
"result_metrics": [
{"metric":{"__name__":"my-gauge","job":"vm","label1":"value1"},"values":[15], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-sum","job":"vm","label5":"value5"},"values":[15.5], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-summary","job":"vm","label6":"value6","quantile": "0.1"},"values":[7.5], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-summary","job":"vm","label6":"value6","quantile": "1"},"values":[15], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-summary","job":"vm","label6":"value6","quantile": "0.5"},"values":[10], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-summary_count","job":"vm","label6":"value6"},"values":[5], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-summary_sum","job":"vm","label6":"value6"},"values":[32.5], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-histogram_sum","job":"vm","label2":"value2"},"values":[30], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-histogram_count","job":"vm","label2":"value2"},"values":[15], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-histogram_bucket","job":"vm","label2":"value2","le": "0.1"},"values":[0], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-histogram_bucket","job":"vm","label2":"value2","le": "0.5"},"values":[5], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-histogram_bucket","job":"vm","label2":"value2","le": "1"},"values":[15], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-histogram_bucket","job":"vm","label2":"value2","le": "5"},"values":[15], "timestamps": ["{TIME_MS}"]},
{"metric":{"__name__":"my-histogram_bucket","job":"vm","label2":"value2","le": "+Inf"},"values":[15], "timestamps": ["{TIME_MS}"]}
],
"data": ["{\"resourceMetrics\":[{\"resource\":{\"attributes\":[{\"key\":\"job\",\"value\":{\"stringValue\":\"vm\"}}]},\"scopeMetrics\":[{\"metrics\":[{\"name\":\"my-gauge\",\"gauge\":{\"dataPoints\":[{\"attributes\":[{\"key\":\"label1\",\"value\":{\"stringValue\":\"value1\"}}],\"timeUnixNano\":\"{TIME_NS}\",\"asInt\":\"15\"}]}},{\"name\":\"my-histogram\",\"histogram\":{\"dataPoints\":[{\"attributes\":[{\"key\":\"label2\",\"value\":{\"stringValue\":\"value2\"}}],\"timeUnixNano\":\"{TIME_NS}\",\"count\":\"15\",\"sum\":30,\"bucketCounts\":[\"0\",\"5\",\"10\",\"0\",\"0\"],\"explicitBounds\":[0.1,0.5,1,5]}],\"aggregationTemporality\":\"AGGREGATION_TEMPORALITY_CUMULATIVE\"}},{\"name\":\"my-sum\",\"sum\":{\"dataPoints\":[{\"attributes\":[{\"key\":\"label5\",\"value\":{\"stringValue\":\"value5\"}}],\"timeUnixNano\":\"{TIME_NS}\",\"asDouble\":15.5}],\"aggregationTemporality\":\"AGGREGATION_TEMPORALITY_CUMULATIVE\"}},{\"name\":\"my-summary\",\"summary\":{\"dataPoints\":[{\"attributes\":[{\"key\":\"label6\",\"value\":{\"stringValue\":\"value6\"}}],\"timeUnixNano\":\"{TIME_NS}\",\"count\":\"5\",\"sum\":32.5,\"quantileValues\":[{\"quantile\":0.1,\"value\":7.5},{\"quantile\":0.5,\"value\":10},{\"quantile\":1,\"value\":15}]}]}}]}]}]}"]
}
8 changes: 8 additions & 0 deletions app/vmagent/main.go
Expand Up @@ -16,6 +16,7 @@ import (
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/graphite"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/influx"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/native"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/opentelemetryhttp"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/opentsdb"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/opentsdbhttp"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/prometheusimport"
Expand Down Expand Up @@ -316,6 +317,13 @@ func requestHandler(w http.ResponseWriter, r *http.Request) bool {
w.Header().Set("Content-Type", "application/json")
fmt.Fprintf(w, `{}`)
return true
case "/opentelemetry/api/v1/push":
if err := opentelemetryhttp.InsertHandler(nil, r); err != nil {
httpserver.Errorf(w, r, "%s", err)
return true
}
w.WriteHeader(http.StatusOK)
return true
case "/prometheus/targets", "/targets":
promscrapeTargetsRequests.Inc()
promscrape.WriteHumanReadableTargetsStatus(w, r)
Expand Down
83 changes: 83 additions & 0 deletions app/vmagent/opentelemetryhttp/request_handler.go
@@ -0,0 +1,83 @@
package opentelemetryhttp

import (
"net/http"

"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/common"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/remotewrite"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompb"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
parserCommon "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/common"
parser "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/opentelemetry"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/tenantmetrics"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/writeconcurrencylimiter"
"github.com/VictoriaMetrics/metrics"
)

var (
rowsInserted = metrics.NewCounter(`vmagent_rows_inserted_total{type="opentelemetry"}`)
rowsTenantInserted = tenantmetrics.NewCounterMap(`vmagent_tenant_inserted_rows_total{type="opentelemetry"}`)
rowsPerInsert = metrics.NewHistogram(`vmagent_rows_per_insert{type="opentelemetry"}`)
)

// InsertHandler processes opentelemetry metrics.
func InsertHandler(at *auth.Token, req *http.Request) error {
extraLabels, err := parserCommon.GetExtraLabels(req)
if err != nil {
return err
}
isJSON := req.Header.Get("Content-Type") == "application/json"
isGzipped := req.Header.Get("Content-Encoding") == "gzip"
return writeconcurrencylimiter.Do(func() error {
return parser.ParseStream(req.Body, isJSON, isGzipped, func(tss []prompb.TimeSeries) error {
return insertRows(at, tss, extraLabels)
})
})
}

func insertRows(at *auth.Token, timeseries []prompb.TimeSeries, extraLabels []prompbmarshal.Label) error {
ctx := common.GetPushCtx()
defer common.PutPushCtx(ctx)

rowsTotal := 0
tssDst := ctx.WriteRequest.Timeseries[:0]
labels := ctx.Labels[:0]
samples := ctx.Samples[:0]
for i := range timeseries {
ts := &timeseries[i]
rowsTotal += len(ts.Samples)
labelsLen := len(labels)
for i := range ts.Labels {
label := &ts.Labels[i]
labels = append(labels, prompbmarshal.Label{
Name: bytesutil.ToUnsafeString(label.Name),
Value: bytesutil.ToUnsafeString(label.Value),
})
}
labels = append(labels, extraLabels...)
samplesLen := len(samples)
for i := range ts.Samples {
sample := &ts.Samples[i]
samples = append(samples, prompbmarshal.Sample{
Value: sample.Value,
Timestamp: sample.Timestamp,
})
}
tssDst = append(tssDst, prompbmarshal.TimeSeries{
Labels: labels[labelsLen:],
Samples: samples[samplesLen:],
})
}
ctx.WriteRequest.Timeseries = tssDst
ctx.Labels = labels
ctx.Samples = samples
remotewrite.Push(at, &ctx.WriteRequest)
rowsInserted.Add(rowsTotal)
if at != nil {
rowsTenantInserted.Get(at).Add(rowsTotal)
}
rowsPerInsert.Update(float64(rowsTotal))
return nil
}
8 changes: 8 additions & 0 deletions app/vminsert/main.go
Expand Up @@ -14,6 +14,7 @@ import (
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/graphite"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/influx"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/native"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/opentelemetryhttp"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/opentsdb"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/opentsdbhttp"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/prometheusimport"
Expand Down Expand Up @@ -221,6 +222,13 @@ func RequestHandler(w http.ResponseWriter, r *http.Request) bool {
w.Header().Set("Content-Type", "application/json")
fmt.Fprintf(w, `{}`)
return true
case "/opentelemetry/api/v1/push":
if err := opentelemetryhttp.InsertHandler(r); err != nil {
httpserver.Errorf(w, r, "%s", err)
return true
}
w.WriteHeader(http.StatusOK)
return true
case "/prometheus/targets", "/targets":
promscrapeTargetsRequests.Inc()
promscrape.WriteHumanReadableTargetsStatus(w, r)
Expand Down
81 changes: 81 additions & 0 deletions app/vminsert/opentelemetryhttp/request_handler.go
@@ -0,0 +1,81 @@
package opentelemetryhttp

import (
"net/http"

"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/common"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/relabel"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompb"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
parserCommon "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/common"
parser "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/opentelemetry"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/writeconcurrencylimiter"
"github.com/VictoriaMetrics/metrics"
)

var (
rowsInserted = metrics.NewCounter(`vm_rows_inserted_total{type="opentelemetry"}`)
rowsPerInsert = metrics.NewHistogram(`vm_rows_per_insert{type="opentelemetry"}`)
)

// InsertHandler processes opentelemetry metrics.
func InsertHandler(req *http.Request) error {
extraLabels, err := parserCommon.GetExtraLabels(req)
if err != nil {
return err
}
isJSON := req.Header.Get("Content-Type") == "application/json"
isGzipped := req.Header.Get("Content-Encoding") == "gzip"
return writeconcurrencylimiter.Do(func() error {
return parser.ParseStream(req.Body, isJSON, isGzipped, func(tss []prompb.TimeSeries) error {
return insertRows(tss, extraLabels)
})
})
}

func insertRows(timeseries []prompb.TimeSeries, extraLabels []prompbmarshal.Label) error {
ctx := common.GetInsertCtx()
defer common.PutInsertCtx(ctx)

rowsLen := 0
for i := range timeseries {
rowsLen += len(timeseries[i].Samples)
}
ctx.Reset(rowsLen)
rowsTotal := 0
hasRelabeling := relabel.HasRelabeling()
for i := range timeseries {
ts := &timeseries[i]
rowsTotal += len(ts.Samples)
ctx.Labels = ctx.Labels[:0]
srcLabels := ts.Labels
for _, srcLabel := range srcLabels {
ctx.AddLabelBytes(srcLabel.Name, srcLabel.Value)
}
for j := range extraLabels {
label := &extraLabels[j]
ctx.AddLabel(label.Name, label.Value)
}
if hasRelabeling {
ctx.ApplyRelabeling()
}
if len(ctx.Labels) == 0 {
// Skip metric without labels.
continue
}
ctx.SortLabelsIfNeeded()
var metricNameRaw []byte
var err error
samples := ts.Samples
for i := range samples {
r := &samples[i]
metricNameRaw, err = ctx.WriteDataPointExt(metricNameRaw, ctx.Labels, r.Timestamp, r.Value)
if err != nil {
return err
}
}
}
rowsInserted.Add(rowsTotal)
rowsPerInsert.Update(float64(rowsTotal))
return ctx.FlushBufs()
}
2 changes: 2 additions & 0 deletions docs/CHANGELOG.md
Expand Up @@ -15,6 +15,8 @@ The following tip changes can be tested by building VictoriaMetrics components f

## tip

* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): add [opentelemetry](https://opentelemetry.io/docs/reference/specification/metrics/) protocol ingestion support. It allows push opentelemetry metrics directly to `vmagent` or `vmsingle`.
* FEATURE: [vmctl](https://docs.victoriametrics.com/vmctl.html): add `influx-prometheus-mode` command-line flag, which allows to restore the original time series written from Prometheus into InfluxDB during data migration from InfluxDB to VictoriaMetrics. See [this feature request](https://github.com/VictoriaMetrics/vmctl/issues/8). Thanks to @mback2k for [the pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/2545).

## [v1.83.1](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.83.1)

Expand Down
15 changes: 15 additions & 0 deletions docs/README.md
Expand Up @@ -65,8 +65,13 @@ VictoriaMetrics has the following prominent features:
* [JSON line format](#how-to-import-data-in-json-line-format).
* [Arbitrary CSV data](#how-to-import-csv-data).
* [Native binary format](#how-to-import-data-in-native-format).
<<<<<<< HEAD
* [DataDog agent or DogStatsD](#how-to-send-data-from-datadog-agent).
* It supports metrics [relabeling](#relabeling).
=======
* [OpenTelemetry format](#sending-data-via-opentelemetry-http).
* It supports metrics' relabeling. See [these docs](#relabeling) for details.
>>>>>>> 6721d134d (lib/protoparser: adds opentelemetry parser)
* It can deal with [high cardinality issues](https://docs.victoriametrics.com/FAQ.html#what-is-high-cardinality) and [high churn rate](https://docs.victoriametrics.com/FAQ.html#what-is-high-churn-rate) issues via [series limiter](#cardinality-limiter).
* It ideally works with big amounts of time series data from APM, Kubernetes, IoT sensors, connected cars, industrial telemetry, financial data and various [Enterprise workloads](https://docs.victoriametrics.com/enterprise.html).
* It has open source [cluster version](https://github.com/VictoriaMetrics/VictoriaMetrics/tree/cluster).
Expand Down Expand Up @@ -1202,6 +1207,16 @@ Note that it could be required to flush response cache after importing historica

VictoriaMetrics also may scrape Prometheus targets - see [these docs](#how-to-scrape-prometheus-exporters-such-as-node-exporter).

## Sending data via opentelemetry http

VictoriaMetrics supports data ingestion with [opentelemetry protocol](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/datamodel.md#opentelemetry-protocol-data-model) with `protobuf` and `json` encoding
via `/opentemetry/api/v1/push` path. For example, following command ingest single gauge metric:
```bash
curl -XPOST -H 'Content-Type: application/json' localhost:8428/opentelemetry/api/v1/push -g -d '{"resourceMetrics":[{"resource":{"attributes":[{"key":"job", "value":{"stringValue":"vm"}}]}, "scopeMetrics":[{"metrics":[{"name":"my-gauge", "gauge":{"dataPoints":[{"attributes":[{"key":"label1", "value":{"stringValue":"value1"}}], "timeUnixNano":"15000000000", "asInt":"15"}]}}]}]}]}'
```
By default, VictoriaMetrics decodes response with `protobuf` decoder, pass http header `Content-Type: application/json` for json encoded request.
VictoriaMetrics accepts data with gzip compression, pass http header `Content-Encoding: gzip` for compressed data.

## Relabeling

VictoriaMetrics supports Prometheus-compatible relabeling for all the ingested metrics if `-relabelConfig` command-line flag points
Expand Down

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