dbf2941bbf
replicas: 4 was fighting the HPA's minReplicas: 8 on every reconcile -
GitOps tooling (Flux) reapplies the manifest on an interval, which would
keep yanking capacity back down between HPA corrections and quietly
undo the burst-headroom fix from c38a367.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
364 lines
9.2 KiB
YAML
364 lines
9.2 KiB
YAML
apiVersion: v1
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kind: Namespace
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metadata:
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name: alaska
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labels:
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name: alaska
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environment: production
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app.kubernetes.io/name: alaska
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app.kubernetes.io/managed-by: manuals
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---
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: alaska-config
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namespace: alaska
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labels:
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app.kubernetes.io/name: alaska-config
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app.kubernetes.io/part-of: alaska
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data:
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NATS_URL: "nats://nats.workolik.com:4222"
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LOG_LEVEL: "info"
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ALLOWED_ORIGINS: "http://localhost:3001,http://localhost:3000,https://queue.workolik.com,https://console.nearlexpress.com"
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EXTERNAL_BASE_URL: "https://jupiter.nearle.app"
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WORKER_CONCURRENCY: "10"
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RETRY_ATTEMPTS: "5"
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RETRY_DELAY_SECONDS: "5"
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NATS_STREAM: "EVENTS"
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NATS_SUBJECT: "api.>"
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NATS_CONSUMER: "worker_consumer"
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---
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apiVersion: v1
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kind: Secret
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metadata:
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name: nats-credentials
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namespace: alaska
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labels:
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app.kubernetes.io/name: nats-credentials
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app.kubernetes.io/part-of: alaska
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type: Opaque
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stringData:
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username: admin
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password: package@321#
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---
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apiVersion: v1
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kind: Secret
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metadata:
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name: external-endpoint-secrets
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namespace: alaska
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labels:
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app.kubernetes.io/name: external-endpoint-secrets
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app.kubernetes.io/part-of: alaska
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type: Opaque
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stringData:
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api_key: "" # Add your API key securely
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---
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apiVersion: apps/v1
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kind: StatefulSet
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metadata:
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name: deliveries
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namespace: alaska
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labels:
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app.kubernetes.io/name: deliveries
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app.kubernetes.io/instance: deliveries-primary
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app.kubernetes.io/part-of: alaska
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app.kubernetes.io/component: backend
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spec:
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serviceName: "deliveries" # Required for StatefulSet
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# replicas intentionally omitted - the HPA below owns this field. A
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# hardcoded value here would fight the HPA on every GitOps reconcile,
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# yanking replicas back down between HPA corrections.
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selector:
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matchLabels:
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app.kubernetes.io/name: deliveries
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app.kubernetes.io/instance: deliveries-primary
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template:
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metadata:
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labels:
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app.kubernetes.io/name: deliveries
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app.kubernetes.io/instance: deliveries-primary
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app.kubernetes.io/part-of: alaska
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app.kubernetes.io/component: backend
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annotations:
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prometheus.io/scrape: "true"
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prometheus.io/port: "8000"
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prometheus.io/path: "/metrics"
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spec:
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securityContext:
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runAsUser: 1000
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runAsGroup: 1000
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fsGroup: 2000
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tolerations:
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- key: dedicated
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operator: Equal
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value: apps
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effect: NoSchedule
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affinity:
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nodeAffinity:
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requiredDuringSchedulingIgnoredDuringExecution:
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nodeSelectorTerms:
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- matchExpressions:
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- key: node-role.workolik/app
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operator: In
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values:
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- "true"
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podAntiAffinity:
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preferredDuringSchedulingIgnoredDuringExecution:
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- weight: 100
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podAffinityTerm:
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labelSelector:
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matchExpressions:
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- key: app.kubernetes.io/name
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operator: In
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values:
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- deliveries
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topologyKey: kubernetes.io/hostname
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topologySpreadConstraints:
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- maxSkew: 1
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topologyKey: kubernetes.io/hostname
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whenUnsatisfiable: ScheduleAnyway
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labelSelector:
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matchLabels:
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app.kubernetes.io/name: deliveries
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containers:
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- name: deliveries
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image: workolik360/alaska:v1.2.0
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imagePullPolicy: Always
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securityContext:
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allowPrivilegeEscalation: false
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readOnlyRootFilesystem: false
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capabilities:
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drop:
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- ALL
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ports:
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- containerPort: 8000
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name: http
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envFrom:
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- configMapRef:
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name: alaska-config
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env:
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- name: NATS_USER
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valueFrom:
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secretKeyRef:
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name: nats-credentials
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key: username
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- name: NATS_PASSWORD
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valueFrom:
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secretKeyRef:
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name: nats-credentials
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key: password
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resources:
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requests:
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memory: "256Mi"
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cpu: "200m"
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limits:
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memory: "1Gi"
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cpu: "1000m"
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livenessProbe:
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httpGet:
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path: /health
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port: 8000
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initialDelaySeconds: 30
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periodSeconds: 10
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timeoutSeconds: 5
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failureThreshold: 3
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readinessProbe:
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httpGet:
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path: /ready
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port: 8000
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initialDelaySeconds: 10
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periodSeconds: 5
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timeoutSeconds: 3
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failureThreshold: 3
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: deliveries-service
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namespace: alaska
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labels:
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app.kubernetes.io/name: deliveries
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app.kubernetes.io/part-of: alaska
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spec:
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type: ClusterIP
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ports:
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- port: 8000
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targetPort: 8000
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protocol: TCP
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name: http
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selector:
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app.kubernetes.io/name: deliveries
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app.kubernetes.io/instance: deliveries-primary
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sessionAffinity: None
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: deliveries-loadbalancer
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namespace: alaska
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labels:
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app.kubernetes.io/name: deliveries
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app.kubernetes.io/part-of: alaska
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annotations:
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# Service health check port for LoadBalancer
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# service.kubernetes.io/klipper-lb.healthcheck-port: "8201"
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spec:
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type: NodePort
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externalTrafficPolicy: Cluster
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selector:
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app.kubernetes.io/name: deliveries
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app.kubernetes.io/instance: deliveries-primary
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ports:
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- name: http
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port: 8201 # external LB port
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targetPort: 8000 # API container port
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nodePort: 30662
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protocol: TCP
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- name: https
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port: 8441 # optional HTTPS passthrough
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targetPort: 8000
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protocol: TCP
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---
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apiVersion: policy/v1
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kind: PodDisruptionBudget
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metadata:
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name: deliveries-pdb
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namespace: alaska
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labels:
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app.kubernetes.io/name: deliveries
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app.kubernetes.io/part-of: alaska
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spec:
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minAvailable: 50%
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selector:
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matchLabels:
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app.kubernetes.io/name: deliveries
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---
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apiVersion: autoscaling/v2
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kind: HorizontalPodAutoscaler
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metadata:
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name: deliveries-hpa
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namespace: alaska
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labels:
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app.kubernetes.io/name: deliveries
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app.kubernetes.io/part-of: alaska
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spec:
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scaleTargetRef:
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apiVersion: apps/v1
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kind: StatefulSet
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name: deliveries
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minReplicas: 8
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maxReplicas: 20
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# Kubernetes autoscaling reacts to sustained load over ~30-60s (metric
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# polling + pod scheduling + readiness delay) - it does very little for a
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# burst that's over in seconds. This behavior block removes the scale-up
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# stabilization delay and allows adding pods aggressively, so the cluster
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# reacts as fast as the metrics pipeline allows rather than waiting extra
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# cycles. minReplicas above is the main defense for bursts (baseline
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# capacity that's already there before a burst starts); this just makes
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# whatever additional scaling happens land as quickly as possible.
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behavior:
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scaleUp:
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stabilizationWindowSeconds: 0
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policies:
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- type: Percent
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value: 100
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periodSeconds: 15
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- type: Pods
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value: 4
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periodSeconds: 15
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selectPolicy: Max
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scaleDown:
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stabilizationWindowSeconds: 300
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metrics:
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- type: Resource
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resource:
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name: cpu
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target:
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type: Utilization
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averageUtilization: 60
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- type: Resource
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resource:
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name: memory
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target:
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type: Utilization
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averageUtilization: 70
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---
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apiVersion: gateway.networking.k8s.io/v1
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kind: Gateway
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metadata:
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name: gateway
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namespace: alaska
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labels:
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app.kubernetes.io/name: gateway
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app.kubernetes.io/part-of: alaska
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spec:
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gatewayClassName: standard
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listeners:
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- name: http
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protocol: HTTP
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port: 8201
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allowedRoutes:
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namespaces:
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from: All
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- name: https
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protocol: HTTPS
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port: 8441
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allowedRoutes:
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namespaces:
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from: All
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tls:
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mode: Terminate
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certificateRefs:
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- name: deliveries-tls-cert
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- name: nearle-http
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protocol: HTTP
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port: 8202
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allowedRoutes:
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namespaces:
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from: All
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- name: nearle-https
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protocol: HTTPS
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port: 8442
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allowedRoutes:
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namespaces:
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from: All
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tls:
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mode: Terminate
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certificateRefs:
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- name: nearle-tls-cert
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namespace: nearle # Must copy secret to alaska or use ReferenceGrant. For now assume secret is in Alaska or copied.
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# Actually, simpler: Use 'nearle-tls-cert' but putting secret in alaska namespace is required for cross-namespace ref usually unless ReferenceGrant used.
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# Let's keep it simple: We will COPY the secret to 'alaska' namespace.
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---
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apiVersion: gateway.networking.k8s.io/v1
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kind: HTTPRoute
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metadata:
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name: deliveries-route
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namespace: alaska
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labels:
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app.kubernetes.io/name: deliveries-route
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app.kubernetes.io/part-of: alaska
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spec:
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parentRefs:
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- name: gateway
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namespace: alaska
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hostnames:
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- "queue.workolik.com"
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rules:
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- matches:
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- path:
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type: PathPrefix
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value: /live
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backendRefs:
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- name: deliveries-service
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port: 8000
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weight: 100
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- matches:
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- path:
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type: PathPrefix
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value: /health
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backendRefs:
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- name: deliveries-service
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port: 8000
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weight: 100
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