Linux Read-Only Root FS

A few things: A kernel module that supports overlay file-system. A set of user space tools to mount writable FS overlaid on top of the read-only FS. And managing your application that resides on the overlay part of the tree other than arbitrary places in the FS.

For the overlay file-system, aufs is one of the most usable ones. You can get a specific for almost all the major Linux kernel releases, and the user-land tools is easy to port.

And the strategies of managing application locations can be described by the auroot example in the aufs user-land utility package, by this list of web pages:

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About minghuasweblog

a long time coder
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