On Tuesday 2011-04-12 09:55, Ed W wrote:
>On 12/04/2011 07:35, sf...@users.sourceforge.net wrote:
>> Hi Ed,
>>
>> Ed W:
>>> - Assume /ro and /rw, where /ro is a base installation, and /rw contains
>>> directories /home/ and /var/
>>> - Desired end result is that /union should become an aufs mount with /ro
>>> readonly at the bottom, rw/{home,var} writeable and next up, and
>>> readonly further up.
>>> - The only writeable dirs on /union are /home and /var
>>>
>>> What is the most efficient configuration to achieve this?
>>
>> If the filesystem type of your ro and rw are not special, I'd suggest to
>> use the default configuration.
>
>Apologies, but that's the bit I'm missing...
>
>If I stack /ro, then /rw, then the resulting union becomes completely
>writable? How to stack only (say /home, /var) a part of the filesystem
>as writable?
mount -t aufs -o br:/home=ro:/var=ro none /mnt
mount -t aufs -o br:sometmpfs=rw:/mnt/foo=ro none /mnt/foo
would seem to be the logical step, though I can't say whether aufs
properly takes a reference on the old /mnt/foo before adding the
vfsmount.
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