Kubernetes(k8s) 增量更新 po

前言

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k8s 增量更新 po

1. 导出要新建po 的控制器配置

为了方便，直接导出现有的控制器配置。
查询配置：

kubectl get deploy -n <命名空间> | grep <过滤字符串>

导出 干净的“可 apply”版本命令：

kubectl get deploy <my-deploy> -n <命名空间> -o yaml \
  | sed -e '/^  uid:/d' \
        -e '/^  resourceVersion:/d' \
        -e '/^  creationTimestamp:/d' \
        -e '/^  generation:/d' \
        -e '/^status:$/,/^[^ ]/d' \
  > deploy_20250905.yaml

额外清理：

• 删掉 managedFields 整块（这是冗余的操作记录，API 会自己维护）。
• 删掉 fieldsType / fieldsV1 / manager / operation / time（都属于 managedFields 的子字段）。

2. 配置详解

脱敏详细配置:

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "7"
    meta.helm.sh/release-name:demo-service-bj
    meta.helm.sh/release-namespace: demo-bj
  labels:
    app:demo-service-bj-task
    app.kubernetes.io/instance:demo-service-bj
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: demo-service
    app.kubernetes.io/version: "2.0"
    helm.sh/chart: demo-service-0.1.1
  name:demo-service-bj-task
  namespace: magic2-bj
spec:
  progressDeadlineSeconds: 600
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      app:demo-service-bj-task
  strategy:
    rollingUpdate:
      maxSurge: 50%
      maxUnavailable: 50%
    type: RollingUpdate
  template:
    metadata:
      annotations:
        kubectl.kubernetes.io/restartedAt: "2025-05-22T09:58:54+08:00"
      creationTimestamp: null
      labels:
        app:demo-service-bj-task
    spec:
      containers:
      - command:
        - /bin/sh
        - -c
        - 'java -Xms1024M -Xmx2024M demo.jar '
        env:
        - name: NACOSURL
          value: yzy:8848
        image: 镜像
        imagePullPolicy: IfNotPresent
        livenessProbe:
          exec:
            command:
            - /bin/sh
            - -c
            - /usr/bin/curl -X GET -s '存活接口(存活探针，检查容器是否健康运行，不健康会被重启)'
              | grep instanceId
          failureThreshold: 5
          initialDelaySeconds: 60
          periodSeconds: 20
          successThreshold: 1
          timeoutSeconds: 3
        name: app
        ports:
        - containerPort: 8080
          protocol: TCP
        readinessProbe:
          exec:
            command:
            - /bin/sh
            - -c
            - /usr/bin/curl -X GET -s '请求接口(就绪探针，检查容器是否可对外服务)'
              | grep instanceId
          failureThreshold: 3
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 1
        resources:
          limits:
            cpu: "2"
            memory: 4000Mi
          requests:
            cpu: 100m
            memory: 500Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /etc/localtime
          name: host-time
          readOnly: true
        - mountPath: /home/app/jars
          name: yzy
      dnsPolicy: ClusterFirst
      nodeSelector:
        kubernetes.io/hostname: <ip>
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount:demo-service-bj
      serviceAccountName:demo-service-bj
      terminationGracePeriodSeconds: 30
      volumes:
      - hostPath:
          path: /etc/localtime
          type: ""
        name: host-time
      - hostPath:
          path: /data/demo/jars
          type: Directory
        name: yzy

3. 重新生效

kubectl apply -f deploy_20250905.yaml -n <命名空间>

注:对象存在就 增量更新，不存在就 新建；Deployment 更新会 触发滚动发布。