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Reorder zfs-* services to allow /var on separate dataset

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ZED depends on /var.  When /var is a separate dataset, it must be
mounted before starting ZED.  This change moves the zfs-zed service
from starting first, to starting after zfs-mount, but before zfs-share.

As discussed in issue #3513, ZED does not need to start first in order
to consume events made during the zfs-import and zfs-mount services.
The events will be queued and can be handled later in the boot process.

ZED may, however, handle sharing in the future, so it should be started
before the zfs-share service.

This commit also stops the zfs-import service from writing temp files
to /var/tmp on shutdown and it corrects the return code for the OpenRC
service.

Other OpenRC-specific changes noted in issue #3513 were reitereated in
issue #3715 and committed in da619f3.

Signed-off-by: James Lee <jlee@thestaticvoid.com>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3513
This commit is contained in:
James Lee
2015-08-30 14:36:41 -04:00
committed by Brian Behlendorf
parent fb40095f5f
commit 3f1cc17c90
5 changed files with 45 additions and 46 deletions
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etc/init.d/README.md
+12 -17
View File
@@ -42,36 +42,31 @@ INSTALLING INIT SCRIPT LINKS
To setup the init script links in /etc/rc?.d manually on a Debian GNU/Linux
(or derived) system, run the following commands (the order is important!):
update-rc.d zfs-zed start 07 S . stop 08 0 1 6 .
update-rc.d zfs-import start 07 S . stop 07 0 1 6 .
update-rc.d zfs-mount start 02 2 3 4 5 . stop 06 0 1 6 .
update-rc.d zfs-import start 07 S . stop 08 0 1 6 .
update-rc.d zfs-mount start 02 2 3 4 5 . stop 07 0 1 6 .
update-rc.d zfs-zed start 26 2 3 4 5 . stop 06 0 1 6 .
update-rc.d zfs-share start 27 2 3 4 5 . stop 05 0 1 6 .
To do the same on RedHat, Fedora and/or CentOS:
chkconfig zfs-zed
chkconfig zfs-import
chkconfig zfs-mount
chkconfig zfs-zed
chkconfig zfs-share
On Gentoo:
rc-update add zfs-zed boot
rc-update add zfs-import boot
rc-update add zfs-mount boot
rc-update add zfs-zed default
rc-update add zfs-share default
The idea here is to make sure all of the ZFS filesystems, including possibly
separate datasets like /var, are mounted before anything else is started.
The idea here is to make sure ZED is started before the imports (so that
we can start consuming pool events before pools are imported).
Then, ZED, which depends on /var, can be started. It will consume and act
on events that occurred before it started. ZED may also play a role in
sharing filesystems in the future, so it is important to start before the
'share' service.
Then import any/all pools (except the root pool which is mounted in the
initrd before the system even boots - basically before the S (single-user)
mode).
Then we mount all filesystems before we start any network service (such as
NFSd, AFSd, Samba, iSCSI targets and what not). Even if the share* in ZFS
isn't used, the filesystem must be mounted for the service to start properly.
Then, at almost the very end, we share filesystems configured with the
share* property in ZFS.
Finally, we share filesystems configured with the share\* property.