asmhatreandClaude Opus 5
a065696478
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
28 lines
923 B
Plaintext
28 lines
923 B
Plaintext
# What Micrometer exports (one pod):
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$ curl <pod>:8080/actuator/prometheus | grep app_inflight
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# HELP app_inflight_requests Requests currently being processed by /work
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# TYPE app_inflight_requests gauge
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app_inflight_requests{application="orders"} 0.0
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# What the HPA controller sees through the custom metrics API:
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$ kubectl get --raw /apis/custom.metrics.k8s.io/v1beta1/namespaces/demo/pods/%2A/app_inflight_requests
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{
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"kind": "MetricValueList",
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"apiVersion": "custom.metrics.k8s.io/v1beta1",
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"metadata": {},
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"items": [
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{
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"describedObject": {
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"kind": "Pod",
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"namespace": "demo",
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"name": "orders-7774f94779-gvc7k",
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"apiVersion": "/v1"
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},
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"metricName": "app_inflight_requests",
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"timestamp": "2026-09-11T16:33:28Z",
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"value": "0",
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"selector": null
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}
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]
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}
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