K6 Percentile Metric to Open Telemetry

Is there a way to include the http_req_duration percentile (e.g., 95pct) metric to an Open Telemetry collector using the xk6-output-opentelemetry?

I’m using the otel/opentelemetry-collector-contrib docker image to observe the k6 metrics.

Here are the OTEL logs for http_req_duration:

Metric #1
Descriptor:
     -> Name: xk6_http_req_duration
     -> Description: 
     -> Unit: ms
     -> DataType: Histogram
     -> AggregationTemporality: Cumulative
HistogramDataPoints #0
Data point attributes:
     -> expected_response: Str(true)
     -> method: Str(GET)
     -> name: Str(https://test-api.k6.io/public/crocodiles/)
     -> proto: Str(HTTP/1.1)
     -> scenario: Str(default)
     -> status: Str(200)
     -> tls_version: Str(tls1.3)
     -> url: Str(https://test-api.k6.io/public/crocodiles/)
StartTimestamp: 2024-10-24 21:26:52.6301498 +0000 UTC
Timestamp: 2024-10-24 21:27:04.9982745 +0000 UTC
Count: 10
Sum: 3281.936400
Min: 231.867900
Max: 617.501800
ExplicitBounds #0: 0.000000
ExplicitBounds #1: 5.000000
ExplicitBounds #2: 10.000000
ExplicitBounds #3: 25.000000
ExplicitBounds #4: 50.000000
ExplicitBounds #5: 75.000000
ExplicitBounds #6: 100.000000
ExplicitBounds #7: 250.000000
ExplicitBounds #8: 500.000000
ExplicitBounds #9: 750.000000
ExplicitBounds #10: 1000.000000
ExplicitBounds #11: 2500.000000
ExplicitBounds #12: 5000.000000
ExplicitBounds #13: 7500.000000
ExplicitBounds #14: 10000.000000
Buckets #0, Count: 0
Buckets #1, Count: 0
Buckets #2, Count: 0
Buckets #3, Count: 0
Buckets #4, Count: 0
Buckets #5, Count: 0
Buckets #6, Count: 0
Buckets #7, Count: 4
Buckets #8, Count: 4
Buckets #9, Count: 2
Buckets #10, Count: 0
Buckets #11, Count: 0
Buckets #12, Count: 0
Buckets #13, Count: 0
Buckets #14, Count: 0
Buckets #15, Count: 0



Metric #1
Descriptor:
     -> Name: xk6_http_req_duration
     -> Description: 
     -> Unit: ms
     -> DataType: Histogram
     -> AggregationTemporality: Cumulative
HistogramDataPoints #0
Data point attributes:
     -> expected_response: Str(true)
     -> method: Str(GET)
     -> name: Str(https://test-api.k6.io/public/crocodiles/)
     -> proto: Str(HTTP/1.1)
     -> scenario: Str(default)
     -> status: Str(200)
     -> tls_version: Str(tls1.3)
     -> url: Str(https://test-api.k6.io/public/crocodiles/)
StartTimestamp: 2024-10-24 21:26:52.6301498 +0000 UTC
Timestamp: 2024-10-24 21:27:01.6303461 +0000 UTC
Count: 7
Sum: 2422.021100
Min: 236.269500
Max: 617.501800
ExplicitBounds #0: 0.000000
ExplicitBounds #1: 5.000000
ExplicitBounds #2: 10.000000
ExplicitBounds #3: 25.000000
ExplicitBounds #4: 50.000000
ExplicitBounds #5: 75.000000
ExplicitBounds #6: 100.000000
ExplicitBounds #7: 250.000000
ExplicitBounds #8: 500.000000
ExplicitBounds #9: 750.000000
ExplicitBounds #10: 1000.000000
ExplicitBounds #11: 2500.000000
ExplicitBounds #12: 5000.000000
ExplicitBounds #13: 7500.000000
ExplicitBounds #14: 10000.000000
Buckets #0, Count: 0
Buckets #1, Count: 0
Buckets #2, Count: 0
Buckets #3, Count: 0
Buckets #4, Count: 0
Buckets #5, Count: 0
Buckets #6, Count: 0
Buckets #7, Count: 2
Buckets #8, Count: 3
Buckets #9, Count: 2
Buckets #10, Count: 0
Buckets #11, Count: 0
Buckets #12, Count: 0
Buckets #13, Count: 0
Buckets #14, Count: 0
Buckets #15, Count: 0

k6 script:

import http from 'k6/http';
import { sleep } from 'k6';

export const options = {
  summaryTrendStats: ["min", "max", "p(95)"],

  thresholds: {
    http_req_duration: ["p(95)<1000"],
  },
};

export default function () {
    http.get('https://test-api.k6.io/public/crocodiles/');
    sleep(1);
}

Run OTEL collector:

docker run --rm -p 4317:4317 -d otel/opentelemetry-collector-contrib

k6 command

./k6 run -e K6_OTEL_METRIC_PREFIX=xk6_ -e K6_OTEL_GRPC_EXPORTER_INSECURE=true -e K6_OTEL_GRPC_EXPORTER_ENDPOINT=0.0.0.0:4317 .\test.js -o experimental-opentelemetry --vus 1 --iterations 10

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