我如何使用 kubernetes 获取客户端 ip？

Question

我正在尝试使用 kubernetes 获取真实的客户端 ip。许多人说我应该将 externalTrafficPolicy: Local 放在我的 kubernetes 设置中，问题是我什至不知道把它放在哪里并且不断出错。这是我的代码 yaml 文件

apiVersion: apps/v1
kind: Deployment
metadata:
  name: <DEV_GCP_APP_NAME>
  labels:
    app: <DEV_GCP_APP_NAME>
spec:
  // when i put externalTrafficPolicy: Local here it says unknown field "externalTrafficPolicy" in io.k8s.api.apps.v1.DeploymentSpec
  replicas: 1
  selector:
    matchLabels:
      app: <DEV_GCP_APP_NAME>
  template:
    metadata:
      labels:
        app: <DEV_GCP_APP_NAME>
    spec:
      // when i put externalTrafficPolicy: Local here it says unknown field "externalTrafficPolicy" in io.k8s.api.core.v1.PodSpec
      containers:
        - name: <DEV_GCP_APP_NAME>
          image: gcr.io/<DEV_GCP_PROJECT_NAME>/<DEV_GCP_APP_NAME>:<CI_PIPELINE_ID>
          env:
            - name: DB_USER
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: db_user
            - name: DB_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: db_pass
            - name: DB_HOST
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: db_host
            - name: DB_PORT
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: db_port
            - name: DB_NAME
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: db_name
            - name: PG_USER
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: pg_user
            - name: PG_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: pg_password
            - name: PG_HOST
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: pg_host
            - name: PG_PORT
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: pg_port
            - name: PG_NAME
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: pg_name
            - name: PORT
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: port
            - name: TOKEN_SECRET
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: token_secret
            - name: COOKIES_SECRET
              valueFrom:
                secretKeyRef:
                  name: data-service-project
                  key: cookies_secret
            - name: GIN_MODE
              value: debug
            - name: DISABLE_EXTERNAL_SERVICE
              value: 'false'
        - name: cloudsql-proxy
          image: gcr.io/cloudsql-docker/gce-proxy:1.16
          command: [ "/cloud_sql_proxy",
                     "-instances=<DEV_GCP_DB_INSTANCE>",
                     "-credential_file=/secrets/cloudsql/sql_credentials.json" ]
          volumeMounts:
            - name: my-secrets-volume
              mountPath: /secrets/cloudsql
              readOnly: true
      volumes:
        - name: my-secrets-volume
          secret:
            secretName: cloudsql-instance-credentials
---
apiVersion: networking.gke.io/v1beta1
kind: ManagedCertificate
metadata:
  name: <DEV_GCP_APP_NAME>-certificate
spec:
  domains:
    - <DEV_GCP_APP_URL>
---
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: <DEV_GCP_APP_NAME>-ingress
  annotations:
    kubernetes.io/ingress.global-static-ip-name: <DEV_GCP_APP_NAME>-static-ip
    networking.gke.io/managed-certificates: <DEV_GCP_APP_NAME>-certificate
spec:
  backend:
    serviceName: <DEV_GCP_APP_NAME>-service
    servicePort: 80
    // when i put externalTrafficPolicy: Local here it says unknown field "externalTrafficPolicy" in io.k8s.api.networking.v1beta1.IngressBackend

我应该把这个 externalTrafficPolicy 东西放在哪里？有人能帮助我吗。谢谢你们:)

Answer 1

externalTrafficPolicy 属于服务规范：

kind: Service
...
spec:
  externalTrafficPolicy: Local

请参阅 Kubernetes documentation 中有关保留客户端源 IP 地址和示例的更多详细文档。

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