Add kubernetes-deployment: probes, shutdown, JVM ergonomics, HPA

Companion code for "Deploying Spring Boot 4 on Kubernetes: Probes, Graceful Shutdown, Limits and JVM Ergonomics". A dependency outage under three probe-group setups, a rolling restart under load four ways (three runs each), the JVM's ergonomic choices for nine pod shapes, one GC-heavy load under five CPU limits with throttling counters, and an HPA driven by a Micrometer gauge through prometheus-adapter. Measured on k3s v1.36.4. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01C3TETMrqVUWeFkNtz3Jbo3
2026-09-11 17:12:10 +00:00
parent 644da9e65e
commit a065696478
72 changed files with 28415 additions and 2 deletions
@@ -0,0 +1,56 @@
+# graceful shutdown + preStop: sleep: {seconds: 5} (run 3 of 3)
+# 20 clients, POST /work?ms=300 via Service orders, 45 s; kubectl rollout restart at ~t=8 s
+
+t=  0s  conc=20  ok=40
+t=  1s  conc=20  ok=60
+t=  2s  conc=20  ok=70
+t=  3s  conc=20  ok=70
+t=  4s  conc=20  ok=60
+t=  5s  conc=20  ok=62
+t=  6s  conc=20  ok=74
+t=  7s  conc=20  ok=64
+t=  8s  conc=20  ok=60
+t=  9s  conc=20  ok=60
+t= 10s  conc=20  ok=65
+t= 11s  conc=20  ok=74
+t= 12s  conc=20  ok=60
+t= 13s  conc=20  ok=63
+t= 14s  conc=20  ok=63
+t= 15s  conc=20  ok=74
+t= 16s  conc=20  ok=60
+t= 17s  conc=20  ok=65
+t= 18s  conc=20  ok=61
+t= 19s  conc=20  IOException=1 ok=69
+t= 20s  conc=20  ok=65
+t= 21s  conc=20  ok=60
+t= 22s  conc=20  ok=65
+t= 23s  conc=20  ok=69
+t= 24s  conc=20  ok=66
+t= 25s  conc=20  ok=61
+t= 26s  conc=20  ok=69
+t= 27s  conc=20  ok=64
+t= 28s  conc=20  ok=66
+t= 29s  conc=20  ok=64
+t= 30s  conc=20  ok=66
+t= 31s  conc=20  ok=66
+t= 32s  conc=20  ok=64
+t= 33s  conc=20  ok=65
+t= 34s  conc=20  ok=69
+t= 35s  conc=20  ok=66
+t= 36s  conc=20  ok=64
+t= 37s  conc=20  ok=68
+t= 38s  conc=20  ok=62
+t= 39s  conc=20  ok=66
+t= 40s  conc=20  ok=69
+t= 41s  conc=20  ok=63
+t= 42s  conc=20  ok=68
+t= 43s  conc=20  ok=63
+t= 44s  conc=20  ok=69
+t= 45s  conc=20  ok=28
+METHOD POST
+TOTAL {IOException=1, ok=2939}
+LATENCY ms p50=304 p90=313 p99=360 max=476 (n=2939)
+
+# Events:
+      1 Normal Killing pod/orders-5cfc646684-4stbt Stopping container app
+      1 Normal Killing pod/orders-5cfc646684-zst8t Stopping container app