Your apps send OpenTelemetry straight to it.

OTEL_EXPORTER_OTLP_ENDPOINT=http://127.0.0.1:8080
OTEL_EXPORTER_OTLP_PROTOCOL=http/protobuf
OTEL_EXPORTER_OTLP_HEADERS=Authorization=Bearer%20${TOPOSCOPE_INGEST_TOKEN}
OTEL_SERVICE_NAME=billing
OTEL_RESOURCE_ATTRIBUTES=service.version=1.4.2
OTEL_LOGS_EXPORTER=otlp
OTEL_METRICS_EXPORTER=otlp

OTEL_EXPORTER_OTLP_ENDPOINT=http://127.0.0.1:4319
OTEL_EXPORTER_OTLP_HEADERS=Authorization=Bearer%20${TOPOSCOPE_INGEST_TOKEN}

sources:
  apps:
    type: opentelemetry
    http:
      address: 127.0.0.1:4318
    grpc:
      address: 127.0.0.1:4317
    use_otlp_decoding: true
 
sinks:
  toposcope:
    type: opentelemetry
    inputs: [apps.logs]
    protocol:
      type: http
      uri: http://127.0.0.1:8080/v1/logs
      encoding:
        codec: otlp
      batch:
        max_events: 1
      request:
        headers:
          Authorization: "Bearer ${TOPOSCOPE_INGEST_TOKEN}"
    buffer:
      type: disk
      max_size: 268435488
      when_full: block

[OUTPUT]
    Name       opentelemetry
    Match      *
    Host       127.0.0.1
    Port       8080
    Logs_uri   /v1/logs
    Traces_uri /v1/traces
    Header     Authorization Bearer ${TOPOSCOPE_INGEST_TOKEN}

otelcol.auth.headers "toposcope" {
  header {
    key   = "Authorization"
    value = "Bearer ${TOPOSCOPE_INGEST_TOKEN}"
  }
}
 
otelcol.exporter.otlphttp "toposcope" {
  client {
    endpoint = "http://127.0.0.1:8080"
    auth     = otelcol.auth.headers.toposcope.handler
  }
}

curl -X POST http://127.0.0.1:8080/api/ingest \
  -H 'authorization: Bearer ${TOPOSCOPE_INGEST_TOKEN}' \
  -d '{"service":"api","level":"error","message":"timeout"}'

- name: Mark deploy in Toposcope
  env:
    TOPOSCOPE_URL: ${{ secrets.TOPOSCOPE_URL }}
    TOPOSCOPE_INGEST_TOKEN: ${{ secrets.TOPOSCOPE_INGEST_TOKEN }}
    TOPOSCOPE_SERVICE: billing
  run: |
    curl -fsS -X POST "${TOPOSCOPE_URL}/v1/marks" \
      -H "authorization: Bearer ${TOPOSCOPE_INGEST_TOKEN}" \
      -H "content-type: application/json" \
      -d "{\"kind\":\"deploy\",\"title\":\"${GITHUB_REF_NAME}\",\"id\":\"deploy-${TOPOSCOPE_SERVICE:+${TOPOSCOPE_SERVICE}-}${GITHUB_REF_NAME}\",\"service\":\"${TOPOSCOPE_SERVICE}\",\"attrs\":{\"version\":\"${GITHUB_REF_NAME}\",\"sha\":\"${GITHUB_SHA}\",\"source\":\"github\"}}"

mark_deploy:
  stage: deploy
  rules:
    - if: $CI_COMMIT_TAG
  script:
    - |
      curl -fsS -X POST "${TOPOSCOPE_URL}/v1/marks" \
        -H "authorization: Bearer ${TOPOSCOPE_INGEST_TOKEN}" \
        -H "content-type: application/json" \
        -d "{\"kind\":\"deploy\",\"title\":\"${CI_COMMIT_TAG}\",\"id\":\"deploy-${TOPOSCOPE_SERVICE:+${TOPOSCOPE_SERVICE}-}${CI_COMMIT_TAG}\",\"service\":\"${TOPOSCOPE_SERVICE}\",\"attrs\":{\"version\":\"${CI_COMMIT_TAG}\",\"sha\":\"${CI_COMMIT_SHA}\",\"source\":\"gitlab\"}}"

echo '<27>Aug 14 01:02:03 api-1 nginx: timeout' \
  | nc -u -w1 127.0.0.1 5514