How to reuse filesystem subtree amongst multiple jails?

Question

I have a FreeBSD 11 host, and I want to setup multiple jails in it. Official guide suggests hard copying /usr/bin into each of the containers. Having that my jails shall be nearly identical, this seems wasteful for me.

It would be nice if I could reuse the same part of filesystem inside all of the jails, in the same manner as with Linux's mount --bind -o ro <host /usr/bin> <jailed /usr/bin>. It it possible?

The filesystem you are looking for is `nullfs` – Richard Smith Sep 01 '16 at 16:23 — Richard Smith, Sep 01 '16 at 16:23

score 2 · Accepted Answer · answered Sep 01 '16 at 19:51

2

In FreeBSD your can use nullfs to mount subtree of filesystem.

There are several tools to make jail creating/updating more easy (listed in the Freebsd Wiki). One of them ezjail and ezjail uses nullfs to mount one basejail inside several jails.

answered Sep 01 '16 at 19:51

citrin

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How to reuse filesystem subtree amongst multiple jails?

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