k8s pod增加域名解析

k8s环境，当我们需要在pod容器镜像中增加host解析时，可以利用HostAliases来进行配置

kind: Deployment
apiVersion: apps/v1
metadata:
  name: demo-app-v1
  namespace: scrm
  labels:
    app: demo-app
    app.kubernetes.io/name: demo-app
    app.kubernetes.io/version: v1
    version: v1
  annotations:
    deployment.kubernetes.io/revision: '42'
    kubesphere.io/creator: mingming
    servicemesh.kubesphere.io/enabled: 'false'
spec:
  replicas: 1
  selector:
    matchLabels:
      app: demo-app
      app.kubernetes.io/name: demo-app
      app.kubernetes.io/version: v1
      version: v1
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: demo-app
        app.kubernetes.io/name: demo-app
        app.kubernetes.io/version: v1
        version: v1
      annotations:
        kubesphere.io/restartedAt: '2023-02-16T06:40:12.266Z'
        logging.kubesphere.io/logsidecar-config: '{}'
        sidecar.istio.io/inject: 'false'
    spec:
      volumes:
        - name: host-time
          hostPath:
            path: /etc/localtime
            type: ''
      containers:
        - name: scrm-api
          image: 'nginx:latest'
          ports:
            - name: http-0
              containerPort: 8001
              protocol: TCP
          resources: {}
          volumeMounts:
            - name: host-time
              readOnly: true
              mountPath: /etc/localtime
          terminationMessagePath: /dev/termination-log
          terminationMessagePolicy: File
          imagePullPolicy: Always
      restartPolicy: Always
      terminationGracePeriodSeconds: 30
      dnsPolicy: ClusterFirst
      serviceAccountName: default
      serviceAccount: default
      securityContext: {}
      imagePullSecrets:
        - name: harbor
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
            - weight: 100
              podAffinityTerm:
                labelSelector:
                  matchLabels:
                    app: demo-app
                    app.kubernetes.io/name: demo-app
                    app.kubernetes.io/version: v1
                    version: v1
                topologyKey: kubernetes.io/hostname
      schedulerName: default-scheduler
      hostAliases:
        - ip: 192.168.200.23
          hostnames:
            - demo.com
            - test.com
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 25%
      maxSurge: 25%
  revisionHistoryLimit: 10
  progressDeadlineSeconds: 600