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---
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icon: edit
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date: 2023-03-02
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category:
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- Kubernetes
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headerDepth: 5
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---
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# kubernetes 挂载单个文件的方式 configMap 及挂载注意事项
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**问题现象**
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默认挂载 configMap 时，kubernetes 会覆盖掉挂载的整个目录，哪怕使用 items 也会导致整个目录被覆盖，那么如何实现挂在单个文件而不覆盖整个目录呢。下面说一下 kubernetes 中如何挂载单个文件而不是整个目录。
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**解决方案**
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使用 subPath
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实际上 kubernets 本身提供了 volumeMounts.subPath 属性用于挂在单个文件而不是整个目录。
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下面是一个示例：
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```
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apiVersion: v1
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kind: Pod
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metadata:
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name: my-lamp-site
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spec:
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containers:
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- name: php
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image: php:7.0-apache
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volumeMounts:
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- mountPath: /var/www/html/index.php
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name: index
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subPath: index.php
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volumes:
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- name: index
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configMap:
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name: php-index
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items:
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- key: index.php
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path: index.php
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```
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kubesphere
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注意事项
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需要注意的是：
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如果使用ConfigMap的subPath挂载为Container的Volume，Kubernetes不会做自动热更新
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ConfigMap 哪怕不使用subPath的挂载方式 C# 文件修改监听功能也没有触发，Golang 的正常，怀疑可能和自己的实现有关.
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