[OE-core] [RFC PATCH] bind: add support for read-only rootfs

[Phil Blundell]

On Thu, 2013-11-21 at 00:59 -0600, Mark Hatle wrote:
> +# When using a read-only rootfs additional setup may be required
> +# uncomment the following line to make bind start in read-only rootfs
> +#ALLOW_ROOTFS_READ_ONLY="yes"

If the filesystem is read-only then it's going to be fairly difficult
for the user to uncomment this line on the target.

Why would you ever want this variable to be set to anything other than
"yes"?  If your filesystem is not in fact read-only then it isn't going
to have any effect, and if your filesystem is read-only then bind won't
work without it.

> ++	[ `is_on_read_only_partition /etc/bind` = "yes" ] && bind_mount /var/volatile/bind/etc /etc/bind
> ++	[ `is_on_read_only_partition /var/named` = "yes" ] && bind_mount /var/volatile/bind/named /var/named

Is it really necessary to mount a tmpfs at /etc/bind?  Can't those files
just be relocated somewhere else?

p.