Deployment

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복제된 (replicated) 애플리케이션(Pod)를 관리하는 오브젝트

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롤링 업데이트나 롤백 등을 구현하는 리소스

Deployment 배포 전략

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recreate : 모든 파드 삭제 후 다시 파드 생성 (다운 타임 발생)

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rollingupdate : 하나씩 업데이트

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maxUnavailable : 업데이트 진행 중 사용 불가능한 최대 Pod 수

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maxSurge : 업데이트 진행 중 원래 replicas 수를 초과할 수 있는 최대 Pod 수

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deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: <Deployment Name>
  namespace: <Namespace>
  labels:
    app: worker
spec:
  replicas: 2
  selector:
    matchLabels:
      app: worker
  template:
    metadata:
      labels:
        app: worker
    spec:
      containers:
      - name: <Container Name>
        image: <Image>
        ports:
        - containerPort: 80
YAML
복사

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Health Check

apiVersion: apps/v1
kind: Deployment
metadata:
  name: dev-dpm
  namespace: dev-ns
  labels:
    app: dev
spec:
  replicas: 3
  selector:
    matchLabels:
      app: dev
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: dev
    spec:
      containers:
      - name: dev-cnt
        image: <image>
        ports:
        - containerPort: <Port>
        startupProbe:
          httpGet:
            path: /healthcheck
            port: 8080
          initialDelaySeconds: 0
          periodSeconds: 5
          timeoutSeconds: 10
          failureThreshold: 12
          successThreshold: 1
        readinessProbe:
          httpGet:
            path: /healthcheck
            port: 8080
          initialDelaySeconds: 0
          periodSeconds: 5
          timeoutSeconds: 10
          failureThreshold: 3
          successThreshold: 1
        livenessProbe:
          httpGet:
            path: /healthcheck
            port: 8080
          initialDelaySeconds: 0
          periodSeconds: 5
          timeoutSeconds: 10
          failureThreshold: 6
          successThreshold: 1
        lifecycle:
          preStop:
            exec:
              command: ["/bin/sh","-c","sleep 30"]
      terminationGracePeriodSeconds: 10
YAML
복사

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ReCreate

apiVersion: apps/v1
kind: Deployment
metadata:
  name: dev-dpm
  namespace: dev-ns
  labels:
    app: dev
spec:
  replicas: 3
  selector:
    matchLabels:
      app: dev
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: dev
    spec:
      containers:
      - name: dev-cnt
        image: <image>
        ports:
        - containerPort: <Port>
YAML
복사

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Rolling Update

apiVersion: apps/v1
kind: Deployment
metadata:
  name: dev-dpm
  namespace: dev-ns
spec:
  replicas: 2
  selector:
    matchLabels:
      app: dev
  strategy:                        
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 50%
      maxUnavailable: 50%
  template:
    metadata:
      labels:
        app: dev
    spec:
      containers:
      - name: dev-cnt
        image: <image>
        ports:
        - containerPort: <Port>
YAML
복사