使用Pod字段作为环境变量的值

apiVersion: v1
kind: Pod
metadata:
  name: dapi-envars-fieldref
spec:
  containers:
    - name: test-container
      image: k8s.gcr.io/busybox
      command: [ "sh", "-c"]
      args:
      - while true; do
          echo -en '\n';
          printenv MY_NODE_NAME MY_POD_NAME MY_POD_NAMESPACE;
          printenv MY_POD_IP MY_POD_SERVICE_ACCOUNT;
          sleep 10;
        done;
      env:
        - name: MY_NODE_NAME
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
        - name: MY_POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: MY_POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: MY_POD_IP
          valueFrom:
            fieldRef:
              fieldPath: status.podIP
        - name: MY_POD_SERVICE_ACCOUNT
          valueFrom:
            fieldRef:
              fieldPath: spec.serviceAccountName
  restartPolicy: Never

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https://kubernetes.io/docs/tasks/inject-data-application/_print/也许上面的例子会对你有帮助。

试试这个：

kubectl create configmap react-config --from-literal=REACT_APP_PORT=3000

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然后：

spec:
       containers:
       - name: create-react-app
         image: gcr.io/google-samples/node-hello:1.0
         envFrom:
         - configMapRef:
             name: react-config

型
现在您从Pod的“外部”配置了env
另请参阅文档：https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/#configure-all-key-value-pairs-in-a-configmap-as-container-environment-variables

尝试跟随

spec:
       containers:
       - name: create-react-app
         image: gcr.io/google-samples/node-hello:1.0
         env:
         - name: REACT_APP_PORT
           value: "3000"

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