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Didier Roche 8ae8b2a144 Workaround to avoid a race when /var/lib is a persistent dataset 
If /var/lib is a dataset not under <pool>/ROOT/<root_dataset>, as
proposed in the ubuntu root on zfs upstream guide
(https://github.com/zfsonlinux/zfs/wiki/Ubuntu-18.04-Root-on-ZFS),
we end up with a race where some services, like systemd-random-seed
are writing under /var/lib, while zfs-mount is called. zfs mount will
then potentially fail because of /var/lib isn't empty and so, can't be
mounted.
Order those 2 units for now (more may be needed) as we can't declare
virtually a provide mount point to match
"RequiresMountsFor=/var/lib/systemd/random-seed" from
systemd-random-seed.service.
The optional generator for zfs 0.8 fixes it, but it's not enabled
by default nor necessarily required.

Example:
- rpool/ROOT/ubuntu (mountpoint = /)
- rpool/var/ (mountpoint = /var)
- rpool/var/lib  (mountpoint = /var/lib)

Both zfs-mount.service and systemd-random-seed.service are starting
After=systemd-remount-fs.service. zfs-mount.service should be done
before local-fs.target while systemd-random-seed.service should finish
before sysinit.target (which is a later target).
Ideally, we would have a way for zfs mount -a unit to declare all paths
or move systemd-random-seed after local-fs.target.

Reviewed-by: Antonio Russo <antonio.e.russo@gmail.com>
Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Didier Roche <didrocks@ubuntu.com>
Closes #9360
2019-10-02 10:51:55 -07:00
.github Fix typos 2019-09-02 18:17:39 -07:00
cmd OpenZFS restructuring - libspl 2019-10-02 10:39:48 -07:00
config OpenZFS restructuring - libspl 2019-10-02 10:39:48 -07:00
contrib Fix for zfs-dracut regression 2019-10-01 12:54:27 -07:00
etc Workaround to avoid a race when /var/lib is a persistent dataset 2019-10-02 10:51:55 -07:00
include Add inode accessors to common code 2019-10-02 09:15:12 -07:00
lib OpenZFS restructuring - libspl 2019-10-02 10:39:48 -07:00
man Add warning for zfs_vdev_elevator option removal 2019-09-25 09:23:29 -07:00
module Add inode accessors to common code 2019-10-02 09:15:12 -07:00
rpm Canonicalize Python shebangs 2019-09-12 13:32:32 -07:00
scripts kmodtool: depmod path 2019-09-11 11:14:50 -07:00
tests OpenZFS restructuring - libspl 2019-10-02 10:39:48 -07:00
udev Restore :: in Makefile.am 2019-08-26 11:48:31 -07:00
.gitignore Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
.travis.yml Add .travis.yml 2017-11-13 09:18:18 -08:00
AUTHORS Update build system and packaging 2018-05-29 16:00:33 -07:00
autogen.sh Cause autogen.sh to fail if autoreconf fails 2018-07-06 09:27:37 -07:00
CODE_OF_CONDUCT.md Add CODE_OF_CONDUCT.md 2019-04-30 10:58:45 -07:00
configure.ac OpenZFS restructuring - libspl 2019-10-02 10:39:48 -07:00
copy-builtin copy-builtin: SPL must be in Kbuild first (again) 2019-09-11 11:09:50 -07:00
COPYRIGHT OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
META Tag 0.8.0 2019-05-21 11:11:41 -07:00
NEWS Add NEWS file 2018-09-18 12:03:47 -07:00
NOTICE Update build system and packaging 2018-05-29 16:00:33 -07:00
README.md Explicitly state supported Linux versions 2018-05-30 20:11:19 -07:00
TEST Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.md

img

ZFS on Linux is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.

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Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.

Release

ZFS on Linux is released under a CDDL license.
For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197

Supported Kernels

  • The META file contains the officially recognized supported kernel versions.