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33df62d052
This change modifies the import service to use the default cache file
to perform a verbatim import of pools at boot. This fixes code that
searches all devices and imported all visible pools.
Using the cache file is in keeping with the way ZFS has always worked,
how Solaris, Illumos, FreeBSD, and systemd performs imports, and is how
it is written in the man page (zpool(1M,8)):
All pools in this cache are automatically imported when the
system boots.
Importantly, the cache contains important information for importing
multipath devices, and helps control which pools get imported in more
dynamic environments like SANs, which may have thousands of visible
and constantly changing pools, which the ZFS_POOL_EXCEPTIONS variable
is not equipped to handle. Verbatim imports prevent rogue pools from
being automatically imported and mounted where they shouldn't be.
The change also stops the service from exporting pools at shutdown.
Exporting pools is only meant to be performed explicitly by the
administrator of the system.
The old behavior of searching and importing all visible pools is
preserved and can be switched on by heeding the warning and toggling
the ZPOOL_IMPORT_ALL_VISIBLE variable in /etc/default/zfs.
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 #3777
Closes #3526
133 lines
5.4 KiB
Plaintext
133 lines
5.4 KiB
Plaintext
# ZoL userland configuration.
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# To enable a boolean setting, set it to yes, on, true, or 1.
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# Anything else will be interpreted as unset.
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# Run `zfs mount -a` during system start?
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ZFS_MOUNT='yes'
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# Run `zfs unmount -a` during system stop?
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ZFS_UNMOUNT='yes'
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# Run `zfs share -a` during system start?
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# nb: The shareiscsi, sharenfs, and sharesmb dataset properties.
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ZFS_SHARE='yes'
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# Run `zfs unshare -a` during system stop?
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ZFS_UNSHARE='yes'
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# By default, a verbatim import of all pools is performed at boot based on the
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# contents of the default zpool cache file. The contents of the cache are
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# managed automatically by the 'zpool import' and 'zpool export' commands.
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#
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# By setting this to 'yes', the system will instead search all devices for
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# pools and attempt to import them all at boot, even those that have been
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# exported. Under this mode, the search path can be controlled by the
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# ZPOOL_IMPORT_PATH variable and a list of pools that should not be imported
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# can be listed in the ZFS_POOL_EXCEPTIONS variable.
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#
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# Note that importing all visible pools may include pools that you don't
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# expect, such as those on removable devices and SANs, and those pools may
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# proceed to mount themselves in places you do not want them to. The results
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# can be unpredictable and possibly dangerous. Only enable this option if you
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# understand this risk and have complete physical control over your system and
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# SAN to prevent the insertion of malicious pools.
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ZPOOL_IMPORT_ALL_VISIBLE='no'
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# Specify specific path(s) to look for device nodes and/or links for the
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# pool import(s). See zpool(8) for more information about this variable.
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# It supersedes the old USE_DISK_BY_ID which indicated that it would only
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# try '/dev/disk/by-id'.
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# The old variable will still work in the code, but is deprecated.
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#ZPOOL_IMPORT_PATH="/dev/disk/by-vdev:/dev/disk/by-id"
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# List of pools that should NOT be imported at boot
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# when ZPOOL_IMPORT_ALL_VISIBLE is 'yes'.
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# This is a space separated list.
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#ZFS_POOL_EXCEPTIONS="test2"
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# List of pools that SHOULD be imported at boot by the initramfs
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# instead of trying to import all available pools. If this is set
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# then ZFS_POOL_EXCEPTIONS is ignored.
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# Only applicable for Debian GNU/Linux {dkms,initramfs}.
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# This is a semi-colon separated list.
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#ZFS_POOL_IMPORT="pool1;pool2"
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# Should the datasets be mounted verbosely?
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# A mount counter will be used when mounting if set to 'yes'.
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VERBOSE_MOUNT='no'
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# Should we allow overlay mounts?
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# This is standard in Linux, but not ZFS which comes from Solaris where this
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# is not allowed).
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DO_OVERLAY_MOUNTS='no'
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# Any additional option to the 'zfs import' commandline?
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# Include '-o' for each option wanted.
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# You don't need to put '-f' in here, unless you want it ALL the time.
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# Using the option 'zfsforce=1' on the grub/kernel command line will
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# do the same, but on a case-to-case basis.
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ZPOOL_IMPORT_OPTS=""
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# Full path to the ZFS cache file?
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# See "cachefile" in zpool(8).
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# The default is "@sysconfdir@/zfs/zpool.cache".
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#ZPOOL_CACHE="@sysconfdir@/zfs/zpool.cache"
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#
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# Setting ZPOOL_CACHE to an empty string ('') AND setting ZPOOL_IMPORT_OPTS to
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# "-c @sysconfdir@/zfs/zpool.cache" will _enforce_ the use of a cache file.
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# This is needed in some cases (extreme amounts of VDEVs, multipath etc).
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# Generally, the use of a cache file is usually not recommended on Linux
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# because it sometimes is more trouble than it's worth (laptops with external
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# devices or when/if device nodes changes names).
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#ZPOOL_IMPORT_OPTS="-c @sysconfdir@/zfs/zpool.cache"
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#ZPOOL_CACHE=""
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# Any additional option to the 'zfs mount' command line?
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# Include '-o' for each option wanted.
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MOUNT_EXTRA_OPTIONS=""
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# Build kernel modules with the --enable-debug switch?
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# Only applicable for Debian GNU/Linux {dkms,initramfs}.
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ZFS_DKMS_ENABLE_DEBUG='no'
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# Build kernel modules with the --enable-debug-dmu-tx switch?
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# Only applicable for Debian GNU/Linux {dkms,initramfs}.
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ZFS_DKMS_ENABLE_DEBUG_DMU_TX='no'
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# Keep debugging symbols in kernel modules?
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# Only applicable for Debian GNU/Linux {dkms,initramfs}.
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ZFS_DKMS_DISABLE_STRIP='no'
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# Wait for this many seconds in the initrd pre_mountroot?
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# This delays startup and should be '0' on most systems.
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# Only applicable for Debian GNU/Linux {dkms,initramfs}.
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ZFS_INITRD_PRE_MOUNTROOT_SLEEP='0'
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# Wait for this many seconds in the initrd mountroot?
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# This delays startup and should be '0' on most systems. This might help on
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# systems which have their ZFS root on a USB disk that takes just a little
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# longer to be available
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# Only applicable for Debian GNU/Linux {dkms,initramfs}.
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ZFS_INITRD_POST_MODPROBE_SLEEP='0'
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# List of additional datasets to mount after the root dataset is mounted?
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#
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# The init script will use the mountpoint specified in the 'mountpoint'
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# property value in the dataset to determine where it should be mounted.
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#
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# This is a space separated list, and will be mounted in the order specified,
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# so if one filesystem depends on a previous mountpoint, make sure to put
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# them in the right order.
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#
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# It is not necessary to add filesystems below the root fs here. It is
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# taken care of by the initrd script automatically. These are only for
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# additional filesystems needed. Such as /opt, /usr/local which is not
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# located under the root fs.
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# Example: If root FS is 'rpool/ROOT/rootfs', this would make sense.
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#ZFS_INITRD_ADDITIONAL_DATASETS="rpool/ROOT/usr rpool/ROOT/var"
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# Optional arguments for the ZFS Event Daemon (ZED).
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# See zed(8) for more information on available options.
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#ZED_ARGS="-M"
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