204 lines
5.1 KiB
YAML
204 lines
5.1 KiB
YAML
# Production-Ready Kubernetes Deployment Template
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# Replace all <placeholders> with actual values
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: <app-name>
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namespace: <namespace>
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labels:
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app.kubernetes.io/name: <app-name>
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app.kubernetes.io/instance: <instance-name>
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app.kubernetes.io/version: "<version>"
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app.kubernetes.io/component: <component> # backend, frontend, database, cache
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app.kubernetes.io/part-of: <system-name>
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app.kubernetes.io/managed-by: kubectl
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annotations:
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description: "<application description>"
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contact: "<team-email>"
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spec:
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replicas: 3 # Minimum 3 for production HA
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revisionHistoryLimit: 10
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selector:
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matchLabels:
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app.kubernetes.io/name: <app-name>
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app.kubernetes.io/instance: <instance-name>
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strategy:
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type: RollingUpdate
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rollingUpdate:
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maxSurge: 1
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maxUnavailable: 0 # Zero-downtime deployment
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minReadySeconds: 10
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progressDeadlineSeconds: 600
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template:
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metadata:
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labels:
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app.kubernetes.io/name: <app-name>
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app.kubernetes.io/instance: <instance-name>
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app.kubernetes.io/version: "<version>"
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annotations:
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prometheus.io/scrape: "true"
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prometheus.io/port: "9090"
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prometheus.io/path: "/metrics"
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spec:
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serviceAccountName: <app-name>
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# Pod-level security context
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securityContext:
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runAsNonRoot: true
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runAsUser: 1000
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runAsGroup: 1000
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fsGroup: 1000
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seccompProfile:
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type: RuntimeDefault
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# Init containers (optional)
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initContainers:
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- name: init-wait
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image: busybox:1.36
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command: ['sh', '-c', 'echo "Initializing..."']
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securityContext:
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allowPrivilegeEscalation: false
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runAsNonRoot: true
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runAsUser: 1000
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containers:
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- name: <container-name>
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image: <registry>/<image>:<tag> # Never use :latest
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imagePullPolicy: IfNotPresent
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ports:
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- name: http
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containerPort: 8080
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protocol: TCP
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- name: metrics
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containerPort: 9090
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protocol: TCP
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# Environment variables
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env:
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- name: POD_NAME
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valueFrom:
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fieldRef:
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fieldPath: metadata.name
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- name: POD_NAMESPACE
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valueFrom:
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fieldRef:
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fieldPath: metadata.namespace
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- name: POD_IP
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valueFrom:
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fieldRef:
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fieldPath: status.podIP
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# Load from ConfigMap and Secret
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envFrom:
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- configMapRef:
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name: <app-name>-config
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- secretRef:
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name: <app-name>-secret
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# Resource limits
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resources:
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requests:
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memory: "256Mi"
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cpu: "250m"
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limits:
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memory: "512Mi"
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cpu: "500m"
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# Startup probe (for slow-starting apps)
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startupProbe:
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httpGet:
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path: /health/startup
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port: http
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initialDelaySeconds: 0
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periodSeconds: 10
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timeoutSeconds: 3
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failureThreshold: 30 # 5 minutes to start
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# Liveness probe
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livenessProbe:
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httpGet:
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path: /health/live
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port: http
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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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# Readiness probe
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readinessProbe:
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httpGet:
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path: /health/ready
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port: http
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initialDelaySeconds: 5
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periodSeconds: 5
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timeoutSeconds: 3
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failureThreshold: 3
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# Volume mounts
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volumeMounts:
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- name: tmp
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mountPath: /tmp
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- name: cache
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mountPath: /app/cache
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# - name: data
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# mountPath: /var/lib/app
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# Container security context
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securityContext:
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allowPrivilegeEscalation: false
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readOnlyRootFilesystem: true
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runAsNonRoot: true
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runAsUser: 1000
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capabilities:
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drop:
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- ALL
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# Lifecycle hooks
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lifecycle:
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preStop:
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exec:
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command: ["/bin/sh", "-c", "sleep 15"] # Graceful shutdown
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# Volumes
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volumes:
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- name: tmp
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emptyDir: {}
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- name: cache
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emptyDir:
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sizeLimit: 1Gi
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# - name: data
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# persistentVolumeClaim:
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# claimName: <app-name>-data
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# Scheduling
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affinity:
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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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matchLabels:
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app.kubernetes.io/name: <app-name>
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topologyKey: kubernetes.io/hostname
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topologySpreadConstraints:
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- maxSkew: 1
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topologyKey: topology.kubernetes.io/zone
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whenUnsatisfiable: ScheduleAnyway
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labelSelector:
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matchLabels:
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app.kubernetes.io/name: <app-name>
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terminationGracePeriodSeconds: 30
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# Image pull secrets (if using private registry)
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# imagePullSecrets:
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# - name: regcred
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