open-telemetry-data-simulator

This is a tool for generating OpenTelemetry data and emitting it to a local sidecar. Useful for testing OpenTelemetry components and doing stress tests.

Test data is define in JSON file which simulator replays.

There are 3 main elements in the test data scenario:

• Repeat Group - iterates its body specific number of times
• Span - emits a span, can nest other spans and metrics
• Metrics - emits metrics, can be nested within Span

Example:

{
    "@type": "repeatGroup",
    "elements": [
      {
        "@type": "span",
        "name": "randomSpan",
        "attributes": {
          "type": "http",
          "userId": "userA"
        },
        "body": {
          "@type": "repeatGroup",
          "elements": [
            {
              "@type": "metrics",
              "elements": [
                {
                  "name": "http.latency",
                  "value": "random",
                  "attrbutes": {
                    "k1": "v1"
                  }
                },
                {
                  "name": "http.latency",
                  "value": "random",
                  "attrbutes": {
                    "k1": "v1"
                  }
                }
              ]
            }
          ],
          "count": 10
        }
      },
      {
        "@type": "metrics",
        "elements": [
          {
            "name": "http1.latency",
            "value": "random",
            "attrbutes": {
              "k1": "v1"
            }
          },
          {
            "name": "http1.latency",
            "value": "random",
            "attrbutes": {
              "k1": "v1"
            }
          }
        ]
      }
    ],
    "count": 10
  }

Here we have a root level repeat group which starts a span with the name randomSpan and the body of another repeated group consisting of two metrics http.latency. Metrics are emitted 10 times per each iteration of randomSpan. Once randomSpan is closed two more metrics http.latency1 are emitted, then the whole thing repeats. Value for metrics can be either a number or "random" in which case random value is emitted.