On Nov 15, 2015, at 9:16 PM, Gordan Bobic <[email protected]>
wrote:
On 15/11/15 09:57, ioan stan wrote:
Also, since the dreamplug is not that powerful, would it be
possible to
build the image based on the minimal server? If somebody wants to
add
any GUI capability, this could be done later from repository.
The images are all minimal with no GUI already.
I tried to install RSEL on my new and faster SD card. I couldn't
complete the install. zfs-fuse is running but I cannot import the
zpool.
Did you initialize the new SD card from the image, or did you dd
the content of the old card onto the new card?
What is the make/model of your new card, and where did you buy it?
pre-mount:/etc# ps -auxw | grep zfs
root 164 0.0 0.5 18656 2616 ? Ssl 00:00 0:00 @bin/zfs-fuse
root 232 0.0 0.1 2568 688 ttyS0S+ 00:06 0:00 grep zfs
pre-mount:/etc# zpool import
pre-mount:/etc# zpool status
no pools available
Are you using the internal uSD card (/dev/sda) or external full size
SD card (/dev/sdb)?
What do you get get from (assuming external full size card):
# fdisk -l /dev/sdb
Gordan
On Nov 8, 2015, at 8:04 AM, Gordan Bobic <[email protected]
<mailto:[email protected]>> wrote:
For those who share my appreciation of zfs, I will be releasing
a patch to zfs-fuse-dracut package that facilitates better
functioning when it is used for zfs-root.
Problem:
zfs-fuse relies on /proc and /dev for importing new pools.
Unfortunately, when it runs from initramfs, systemd, tears down
all of it's contents - the only file handles that remain
available to zfs-fuse are the ones it already has open at the
point the tear-down happens.
Workaround:
Don't use initramfs. The problem is that this means we need a
different pre-root environment for zfs-fuse to run in. What we
can use is squashfs running from a raw partition. That does me
we need an additional partition on the disk, but that is hardly
the end of the world.
We simply unpack the initramfs generated, and re-make it as a
squashfs.
So what we do is we pass to the kernel:
root=/dev/werever_we_put_squashfs_partition
That gets is booting the pre-root environment, but then we have
to do something for the pre-root environment to mount the real
rootfs. This is where the new zfs-fuse-dracut patch comes in.
It now understands a kernel boot paramter zfsroot=pool/fs, which
it will use in preference to root= to determine what FS to use
as the rootfs.
Effect:
Because the rootfs is read-only squashfs it doesn't get torn
down, and zfs-fuse remains fully functional, able to import
new pools (e.g. from removable media).
Side effect:
Init fs ends up showing up mounted on /mnt.
I will put together a more detailed howto on the conversion of
initramfs to squashfs for those that need it once I have
released the zfs-fuse-dracut patch.
