crabka-bench-driver 0.3.0

Load driver + report aggregator for the Crabka vs Strimzi benchmark harness on Kubernetes.

Scenarios describe a target Kafka stack, a workload shape, and optional disturbance windows. The driver applies the scenario to Kubernetes, runs the producer/consumer load, samples Prometheus, and writes a RunOutput JSON artifact. The report binary reads those artifacts back and renders the side-by-side Markdown summary used in benchmark reports.

The crate ships two binaries:

• crabka-bench-driver — runs one scenario against one Kafka stack (Crabka or Strimzi/Kafka), captures throughput / latency / disturbance data, queries Prometheus for resource usage, and writes a single RunOutput JSON file.
• crabka-bench-report — walks a directory of RunOutput files, groups them by scenario name, and emits a side-by-side Markdown summary.

Command-line workflow

crabka-bench-driver \
  --scenario bench/scenarios/steady_1p1r.toml \
  --stack crabka \
  --namespace kafka-bench \
  --out runs/crabka-steady.json

crabka-bench-report --input runs --out report.md

Programmatic report aggregation

use std::path::Path;
use crabka_bench_driver::report;

# fn run() -> Result<(), Box<dyn std::error::Error>> {
let markdown = report::render_markdown(Path::new("runs"), true)?;
std::fs::write("report.md", markdown)?;
# Ok(())
# }