Am 21.07.2015 um 18:01 schrieb Matt Schuckmann:
If you are using systemd you can simply create a separate writeable partition
and then use the volatile_binds.bb recipe to map files or directories from the
read only rootfs to the writable partition via bind mounts.
How should one use the volatile-binds.bb recipe? How can I configure which
files, directories shall be bind mounted?
Thanks
If you are not using systemd you can do the same thing with sysVinit you'll
just have to write your own recipe equivalent to volatile_binds.bb
This method works and the way volatile_binds is written it takes the default
settings from the read only rootfs which is nice.
The only problem I've found is if you have a bind mount to a file you have to
be careful not to delete the file or it will break the mount link.You'd be
surprised how often you want to delete the file when you go to update it.
Therefore I tend to use directories with volatile_binds.bb instead of
individual files.
Matt S.
-----Original Message-----
From: yocto-boun...@yoctoproject.org [mailto:yocto-
boun...@yoctoproject.org] On Behalf Of Gary Thomas
Sent: Thursday, July 16, 2015 4:37 AM
To: Yocto Project
Subject: [yocto] Read-only file system with persistent storage
I'd like to set up a system with a read-only root file system along with some
persistent read-write storage. What are the [best] options in Poky/Yocto for
this? Is there any support for some type of overlay file system?
Thanks for any ideas/pointers
--
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Gary Thomas | Consulting for the
MLB Associates | Embedded world
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