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
76 lines
2.4 KiB
YAML
76 lines
2.4 KiB
YAML
# Minimal Prometheus: scrapes every pod labelled app=orders on /actuator/prometheus every 5 s and
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# keeps the namespace and pod as labels - prometheus-adapter needs both to map a series to a pod.
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apiVersion: v1
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kind: Namespace
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metadata: {name: monitoring}
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---
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apiVersion: v1
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kind: ServiceAccount
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metadata: {name: prometheus, namespace: monitoring}
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata: {name: prometheus-sd}
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rules:
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- apiGroups: [""]
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resources: [pods, endpoints, services]
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verbs: [get, list, watch]
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata: {name: prometheus-sd}
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roleRef: {apiGroup: rbac.authorization.k8s.io, kind: ClusterRole, name: prometheus-sd}
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subjects: [{kind: ServiceAccount, name: prometheus, namespace: monitoring}]
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---
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apiVersion: v1
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kind: ConfigMap
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metadata: {name: prometheus, namespace: monitoring}
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data:
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prometheus.yml: |
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global:
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scrape_interval: 5s
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scrape_configs:
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- job_name: orders
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metrics_path: /actuator/prometheus
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kubernetes_sd_configs:
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- role: pod
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namespaces: {names: [demo]}
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relabel_configs:
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- source_labels: [__meta_kubernetes_pod_label_app]
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regex: orders
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action: keep
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- source_labels: [__meta_kubernetes_pod_container_port_number]
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regex: "8080"
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action: keep
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- source_labels: [__meta_kubernetes_namespace]
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target_label: namespace
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- source_labels: [__meta_kubernetes_pod_name]
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target_label: pod
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata: {name: prometheus, namespace: monitoring}
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spec:
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replicas: 1
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selector: {matchLabels: {app: prometheus}}
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template:
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metadata: {labels: {app: prometheus}}
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spec:
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serviceAccountName: prometheus
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containers:
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- name: prometheus
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image: quay.io/prometheus/prometheus:v3.14.0
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imagePullPolicy: Never
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args: ["--config.file=/etc/prometheus/prometheus.yml", "--storage.tsdb.retention.time=2h"]
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ports: [{containerPort: 9090}]
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resources: {requests: {cpu: 50m, memory: 128Mi}, limits: {memory: 512Mi}}
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volumeMounts: [{name: config, mountPath: /etc/prometheus}]
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volumes: [{name: config, configMap: {name: prometheus}}]
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---
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apiVersion: v1
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kind: Service
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metadata: {name: prometheus, namespace: monitoring}
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spec:
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selector: {app: prometheus}
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ports: [{port: 9090, targetPort: 9090}]
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