INNER CODE UNIT · Python

render_exposition

VersusControl/versus-incident · scripts/generate_fake_metrics.py:148

def render_exposition(series: Series, service: str) -> str:
    """Render the current state in Prometheus text exposition format."""
    lines: list[str] = []
    lines.append("# HELP %s Total demo HTTP requests." % COUNTER_NAME)
    lines.append("# TYPE %s counter" % COUNTER_NAME)
    if not series.requests:
        # Always emit a zero series so the metric exists before the first tick.
        lines.append('%s{service="%s",code="200"} 0' % (COUNTER_NAME, service))
    for code, count in sorted(series.requests.items()):
        lines.append(
            '%s{service="%s",code="%s"} %d' % (COUNTER_NAME, service, code, count)
        )

    lines.append("# HELP %s Request latency in seconds." % HISTOGRAM_NAME)
    lines.append("# TYPE %s histogram" % HISTOGRAM_NAME)
    for i, ub in enumerate(BUCKETS):
        lines.append(
            '%s_bucket{service="%s",le="%s"} %d'

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