Hello everybody
I am trying to understand the recommanded way to deal with read-only
rootfs...
my understanding is that (slightly simplified)
* /run must be a tmpfs
* /var must be writable, and will usually be persistant (can be a tmpfs too)
* everything else can be read-only
My problem comes with populating an empty /var. There seems to be hints
to a systemd-provided mechanism to do that, but I can't find any
documentation for it
Apparently, tmpfiles.d should copy the content from /usr/share/factory
to /var when /var is empty, but I can't find what actually implements that
* is it dynamically added in /run ?
* is it just a recommanded way, and I have to implemented myself ? if
yes, is the directory /usr/share/factory documented anywhere ?
* what qualifies as "empty /var" ? (this is mostly about being robust to
power-loss during the copying of /var)
Any hints would be welcomed
thx
Jeremy
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