如何在kubernetes yaml文件中使用环境值

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
    - name: my-container
      image: my-image
      env:
        - name: ENV_VAR_NAME
          value: ENV_VAR_VALUE

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
    - name: my-container
      image: my-image
      envFrom:
        - configMapRef:
            name: my-configmap
        - secretRef:
            name: my-secret

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
    - name: my-container
      image: my-image
      env:
        - name: ENV_VAR_NAME
          valueFrom:
            configMapKeyRef:
              name: my-configmap
              key: config-key
        - name: SECRET_VAR_NAME
          valueFrom:
            secretKeyRef:
              name: my-secret
              key: secret-key