Initial readonly root support will be in tomorrow's initscripts-8.33-1.
How to use:
- Edit /etc/sysconfig/readonly-root. Set 'READONLY' to 'yes'.
- Add any exceptions that need to be writable that aren't in the
stock /etc/rwtab to an /etc/rwtab.d file. (See below)
** NOTE: This does not currently work with SELinux. We're working on it. **
How it works:
- On boot, we mount a tmpfs (by default, at /var/lib/stateless/writable),
and then parse /etc/rwtab and /etc/rwtab.d/* for things to put there.
These files have the format:
<type> <path>
Types are as follows:
empty: An empty path. Example:
'empty /tmp'
dirs: A directory tree that is copied, empty. Example:
'dirs /var/run'
files: A file or directory tree that is copied intact. Example:
'files /etc/resolv.conf'
A stock rwtab is shipped with common things that need mounted. We're
currently investigating other things. If you come up with new ones,
please file a bug.
Problems should be filed in bugzilla at https://bugzilla.redhat.com/,
product Fedora Core, release devel, component initscripts.
Things we know need work:
- a simple 'prepare' script for a filesystem that is intended to
be mounted read-only - it will update various caches (beagle,
locate), clean out extraneous temporary files, and build the
SELinux policy module.
- using local storage automatically for swap, etc.
- the rest of http://fedoraproject.org/wiki/StatelessLinux :)
Bill
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