optional 示例
optional 示例
env:
- name: EXTRA_FLAG
valueFrom:
configMapKeyRef:
name: feature-flags
key: enabled
optional: true
volumes:
- name: optional-conf
configMap:
name: maybe-missing
optional: true观察失败形态
观察失败形态
kubectl describe pod web-x | grep -A3 Events
# 报错示例：configmap "app-config" not found / key "X" not found「引用但不要求存在」适合灰度开关类配置；核心配置建议显式缺失即失败，尽早暴露问题。