k3s-stress-test.sh

#!/usr/bin/env bash
set -Eeuo pipefail

URL="http://192.168.1.204:8000/api/increment"
ITERATIONS=100
CONCURRENCY=50
LOGFILE="chaos.log"

export URL

post() {
  local i="$1"
  local start end latency

  start=$(date +%s%3N)

  if curl -fsS -X POST "$URL" \
      -H 'Content-Type: application/json' \
      -o /dev/null; then
    end=$(date +%s%3N)
    latency=$((end - start))
    printf '%s OK  %03d %4dms\n' "$(date '+%F %T')" "$i" "$latency"
  else
    end=$(date +%s%3N)
    latency=$((end - start))
    printf '%s ERR %03d %4dms\n' "$(date '+%F %T')" "$i" "$latency" >&2
    return 1
  fi
}

export -f post

run_storm() {
  seq 1 "$ITERATIONS" | xargs -P "$CONCURRENCY" -I {} bash -c 'post "$1"' _ {}
}

echo "=== CHAOS RUN $(date '+%F %T') ===" | tee -a "$LOGFILE"

if ! OUTPUT=$(run_storm 2>&1 | tee -a "$LOGFILE"); then
  echo "⚠️  Errors detected during run" | tee -a "$LOGFILE"
fi

OK_COUNT=$(grep -c ' OK ' <<<"$OUTPUT" || true)
ERR_COUNT=$(grep -c ' ERR ' <<<"$OUTPUT" || true)

SUMMARY="$(date '+%F %T') OK=$OK_COUNT ERR=$ERR_COUNT"

echo "$SUMMARY" | tee -a "$LOGFILE"
echo "🔥 Storm complete — $SUMMARY"