test: add multi-function stress suite and severe load testing

examples/stress-suite/scripts/load_test.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Суровый параллельный прогон по нескольким endpoint-ам.
+BASE_URL=${1:-https://fission.kube5s.ru}
+TOTAL_REQUESTS=${2:-600}
+CONCURRENCY=${3:-60}
+
+USER_NAME=$(kubectl get secrets/router --template={{.data.username}} -n fission | base64 -d)
+USER_PASS=$(kubectl get secrets/router --template={{.data.password}} -n fission | base64 -d)
+TOKEN=$(fission token create --username "$USER_NAME" --password "$USER_PASS")
+LB_IP=$(kubectl -n ingress get svc shturval-ingress-controller-controller -o jsonpath="{.status.loadBalancer.ingress[0].ip}")
+
+run_load() {
+  local path="$1"
+  local label="$2"
+
+  echo "[load] endpoint=$label path=$path requests=$TOTAL_REQUESTS concurrency=$CONCURRENCY"
+
+  result=$(seq 1 "$TOTAL_REQUESTS" | xargs -P "$CONCURRENCY" -I{} sh -c '
+    final_code="000"
+    for attempt in 1 2; do
+      code=$(curl -sk --resolve fission.kube5s.ru:443:'"$LB_IP"' -H "Authorization: Bearer '"$TOKEN"'" -o /dev/null -w "%{http_code}" '"$BASE_URL$path"')
+      final_code="$code"
+      if [ "$code" = "200" ]; then
+        break
+      fi
+    done
+    if [ "$final_code" = "200" ]; then
+      echo ok:200
+    else
+      echo fail:"$final_code"
+    fi
+  ')
+
+  success=$(printf "%s\n" "$result" | grep -c "^ok:200$" || true)
+  fail=$(printf "%s\n" "$result" | grep -c "^fail:" || true)
+  rate=$(awk -v s="$success" -v t="$TOTAL_REQUESTS" 'BEGIN { if (t==0) print 0; else printf "%.2f", (s*100.0)/t }')
+
+  codes=$(printf "%s\n" "$result" | grep "^fail:" | cut -d: -f2 | sort | uniq -c | tr '\n' ';' || true)
+
+  echo "[result] $label success=$success fail=$fail success_rate=${rate}% fail_codes=[${codes}]"
+
+  if [ "$fail" -gt 0 ]; then
+    echo "[error] load test failed for $label"
+    return 1
+  fi
+}
+
+run_load "/stress/fast" "fast"
+run_load "/stress/cpu" "cpu"
+run_load "/stress/json" "json"
+
+echo "[ok] all load tests passed"