ZFS 數據集在重新啟動時消失
我已經在我的 Centos 7 中安裝了 ZFS(0.6.5)，並且我還創建了一個 zpool，除了我的數據集在重啟時消失之外，一切都執行良好。
我一直在嘗試借助各種線上資源和部落格來調試此問題，但無法獲得預期的結果。
重新啟動後，當我發出zfs list命令時，我得到**“no datasets available”，並zpool list給出“no pools available”** 經過大量線上研究後，我可以通過使用zpool import -c cachefile手動導入記憶體文件來使其工作，但是我仍然必須在重新啟動之前執行zpool set cachefile=/etc/zfs/zpool.cache Pool以便稍後在重新啟動後導入它。這是什麼
systemctl status zfs-import-cache好像，
zfs-import-cache.service - Import ZFS pools by cache file Loaded: loaded (/usr/lib/systemd/system/zfs-import-cache.service; static) Active: inactive (dead)
cat /etc/sysconfig/zfs# ZoL userland configuration. # Run `zfs mount -a` during system start? ZFS_MOUNT='yes' # Run `zfs unmount -a` during system stop? ZFS_UNMOUNT='yes' # Run `zfs share -a` during system start? # nb: The shareiscsi, sharenfs, and sharesmb dataset properties. ZFS_SHARE='yes' # Run `zfs unshare -a` during system stop? ZFS_UNSHARE='yes' # Specify specific path(s) to look for device nodes and/or links for the # pool import(s). See zpool(8) for more information about this variable. # It supersedes the old USE_DISK_BY_ID which indicated that it would only # try '/dev/disk/by-id'. # The old variable will still work in the code, but is deprecated. #ZPOOL_IMPORT_PATH="/dev/disk/by-vdev:/dev/disk/by-id" # Should the datasets be mounted verbosely? # A mount counter will be used when mounting if set to 'yes'. VERBOSE_MOUNT='no' # Should we allow overlay mounts? # This is standard in Linux, but not ZFS which comes from Solaris where this # is not allowed). DO_OVERLAY_MOUNTS='no' # Any additional option to the 'zfs mount' command line? # Include '-o' for each option wanted. MOUNT_EXTRA_OPTIONS="" # Build kernel modules with the --enable-debug switch? # Only applicable for Debian GNU/Linux {dkms,initramfs}. ZFS_DKMS_ENABLE_DEBUG='no' # Build kernel modules with the --enable-debug-dmu-tx switch? # Only applicable for Debian GNU/Linux {dkms,initramfs}. ZFS_DKMS_ENABLE_DEBUG_DMU_TX='no' # Keep debugging symbols in kernel modules? # Only applicable for Debian GNU/Linux {dkms,initramfs}. ZFS_DKMS_DISABLE_STRIP='no' # Wait for this many seconds in the initrd pre_mountroot? # This delays startup and should be '0' on most systems. # Only applicable for Debian GNU/Linux {dkms,initramfs}. ZFS_INITRD_PRE_MOUNTROOT_SLEEP='0' # Wait for this many seconds in the initrd mountroot? # This delays startup and should be '0' on most systems. This might help on # systems which have their ZFS root on a USB disk that takes just a little # longer to be available # Only applicable for Debian GNU/Linux {dkms,initramfs}. ZFS_INITRD_POST_MODPROBE_SLEEP='0' # List of additional datasets to mount after the root dataset is mounted? # # The init script will use the mountpoint specified in the 'mountpoint' # property value in the dataset to determine where it should be mounted. # # This is a space separated list, and will be mounted in the order specified, # so if one filesystem depends on a previous mountpoint, make sure to put # them in the right order. # # It is not necessary to add filesystems below the root fs here. It is # taken care of by the initrd script automatically. These are only for # additional filesystems needed. Such as /opt, /usr/local which is not # located under the root fs. # Example: If root FS is 'rpool/ROOT/rootfs', this would make sense. #ZFS_INITRD_ADDITIONAL_DATASETS="rpool/ROOT/usr rpool/ROOT/var" # List of pools that should NOT be imported at boot? # This is a space separated list. #ZFS_POOL_EXCEPTIONS="test2" # Optional arguments for the ZFS Event Daemon (ZED). # See zed(8) for more information on available options. #ZED_ARGS="-M"我不確定這是否是一個已知問題，.. 如果是，是否有任何解決方法？也許是重新啟動後保留我的數據集的一種簡單方法，最好沒有記憶體文件的成本。
請確保 zfs 服務（目標）已啟用。這就是在啟動/關閉時處理池導入/導出的原因。
zfs.target loaded active active ZFS startup target你永遠不必為此掙扎。如果您有機會，請在您的 zfs 發行版上執行更新，因為我知道啟動服務在最近幾個版本中得到了改進：
[root@zfs2 ~]# rpm -qi zfs Name : zfs Version : 0.6.5.2 Release : 1.el7.centos
好的，所以池在那裡，這意味著問題出在您的 zfs.cache 上，它不是持久的，這就是為什麼它在您重新啟動時會失去其配置。我建議做的是執行：
zpool import zfsPool zpool list並檢查它是否可用。重新啟動伺服器並查看它是否恢復，如果沒有，則執行相同的步驟並執行：
zpool scrub只是為了確保您的游泳池等一切正常。
請同時發布以下內容：
/etc/default/zfs.conf /etc/init/zpool-import.conf或者，如果您正在尋找解決此問題的方法，您當然可以按如下方式進行設置。
將值從 1 更改為 0：
/etc/init/zpool-import.conf並將以下內容添加到您的 /etc/rc.local 中：
zfs mount -a那會成功的。