如何在kubernetes容器命令中使用环境变量？

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
      env:
        - name: ENV_VAR_NAME
          valueFrom:
            configMapKeyRef:
              name: my-configmap
              key: ENV_VAR_KEY

kubectl run my-pod --image=my-image --env="ENV_VAR_NAME=ENV_VAR_VALUE"