Importing and mounting ZFS pools at boot time on Fedora servers

If you read my blog you know I am a huge fan of the ZFS file system. Now that the ZFS on Linux project is shipping with Ubuntu I hope it gets more use in the real world. Installing ZFS on a Fedora server is relatively easy though I haven’t found a good guide describing how to import pools and mount file systems at boot. After a bit of digging in /usr/lib/systemd/system/ it turns out this is super easy. On my Fedora 24 server I needed to enable a couple of systemd unit files to get my pool imported at boot time:

$ systemctl enable zfs-mount.service
$ systemctl enable zfs-import-cache.service
$ systemctl enable zfs-import-scan.service

Once these were enabled I rebooted my server and my pool was up and operational:

$ zpool status -v
  pool: bits
 state: ONLINE
  scan: none requested

	NAME                                           STATE     READ WRITE CKSUM
	bits                                           ONLINE       0     0     0
	  raidz1-0                                     ONLINE       0     0     0
	    ata-WDC_WD7500AACS-00D6B1_WD-WCAU47102921  ONLINE       0     0     0
	    ata-WDC_WD7500AACS-00D6B1_WD-WCAU47306478  ONLINE       0     0     0
	    ata-WDC_WD7500AACS-00D6B1_WD-WCAU47459778  ONLINE       0     0     0
	    ata-WDC_WD7500AACS-00D6B1_WD-WCAU47304342  ONLINE       0     0     0

errors: No known data errors

$ df -h /bits
Filesystem      Size  Used Avail Use% Mounted on
bits            2.0T  337G  1.7T  17% /bits

The future is looking bright for ZFS and I hope the Linux port will become rock solid as more people use it.

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