Ubuntu 16.04 on ZFS Root
https://github.com/zfsonlinux/zfs/wiki/Ubuntu-16.04-Root-on-ZFS に書いてある通りにやれば概ねうまく行きます…が、ハマりポイントが。
問題と対処方法
# grub-probe /
grub-probe: error: failed to get canonical path of `/dev/nvme-SAMSUNG_MZVKW512HMJP-00000_S316NA0HA02470'.
ググったところ、これと同じ現象だった。 https://askubuntu.com/questions/827126/zfs-grub-probe-error-failed-to-get-canonical-path-of-dev-disk-name/943425#943425
export ZPOOL_VDEV_NAME_PATH=1 してから続行すればOK。
2017-10-25追記
apt upgrade してkernel等が更新される時にも同じ現象が発生するので /etc/environment に書いておいた方がいいかも知れない。
export ZPOOL_VDEV_NAME_PATH=1
あとがき
入力コマンド多くてめんどすぎるのでインストーラが対応してくれると嬉しいと思ったが、ともかくZFSがUbuntuでも使えて幸せ。ZFSはいいぞ。
あと、なんか /var/lib/docker をZFSにしてるとDockerさんがZFS storage driverのおかげでうまいこと使ってくれてるらしい。ステキ。
$ sudo zfs list
NAME USED AVAIL REFER MOUNTPOINT
rpool 6.67G 454G 96K /
rpool/ROOT 730M 454G 96K none
rpool/ROOT/ubuntu 730M 454G 596M /
rpool/home 1.15G 454G 1.15G /home
rpool/home/root 116K 454G 116K /root
rpool/swap 4.25G 459G 64K -
rpool/var 565M 454G 96K /var
rpool/var/cache 127M 454G 127M /var/cache
rpool/var/docker 437M 454G 2.44M /var/lib/docker
rpool/var/docker/0aaacb3138f365e1d4c9d964a1b4a10492f83ec443ca87b9c6d0764f272daa4e 144K 454G 177M legacy
rpool/var/docker/109ae97aed9f6a3c2206b69bb6c8e47501fd81055bba01d46da683f5b98c928a 91.1M 454G 402M legacy
rpool/var/docker/369076459d433adc3864d6f8fc25939b5155220f434456e78b721f0170ffd756 136K 454G 177M legacy
rpool/var/docker/3d97fe01e33c6b131875009213dc48062e55761298c5064c587703fbd5d38ca9 336K 454G 402M legacy
rpool/var/docker/45f269bd976694049e6bc6de384a2ecee04cbf1fac0a1cf4b2b36b5e279f26fe 112K 454G 310M legacy
rpool/var/docker/4a2fcd050b468dae60876722da2ce32417c6db3feb9518d00ddc1c96af6ead25 120K 454G 102M legacy
rpool/var/docker/59bb8f36e8a3b79187a7b614031d603e7496f54071471860f1dba6bb0838b945 544K 454G 403M legacy
rpool/var/docker/6c64c52e51fea90aaf3348389f5211033d48c567df7d614a8f6f7a96ca5f8b26 124K 454G 177M legacy
rpool/var/docker/76f0d5d1c90273ae2cc66804cf76d7dabdc258982d77e0148b05651fb8870f7b 112K 454G 402M legacy
rpool/var/docker/81d8a1fdfac94e536022daf5bfdd2e97e79de9f20ca9c835b6397ed929de51ef 64K 454G 116K legacy
rpool/var/docker/81d8a1fdfac94e536022daf5bfdd2e97e79de9f20ca9c835b6397ed929de51ef-init 96K 454G 116K legacy
rpool/var/docker/8b4c060de084290d631cf3cc23e472b4a5996023844cf7f1991d0227363385f6 116K 454G 310M legacy
rpool/var/docker/924cef4f8b52d6dff39e22de47f73813bbd86bd87e9d11ee248d23bef7ba74ed 76.7M 454G 177M legacy
rpool/var/docker/95bfeb74816304f20cb37ed58c261c75cc062fbe3cc52871885ad884cc4b79d1 100K 454G 100K legacy
rpool/var/docker/994e42058dbb89c7b9f54ce08f0373434bc0a3fa8e75daf0054c376014d2ef90 168K 454G 102M legacy
rpool/var/docker/ad974f4b93c83cdd16daa580c42c294f25083ad828fd4c89c7d6a3f0e9d4157b 116K 454G 310M legacy
rpool/var/docker/ae2cdec0dacb92dfcf36060601f88dbc7c41089c18afadc04d145f48c6d39553 232K 454G 90.3M legacy
rpool/var/docker/af7685f0366cde61798c189da6c806f3e09e187458cf32d51c98b34905479306 90.3M 454G 90.3M legacy
rpool/var/docker/b3ede8363841c8c0344e5d7e61078c1f6d79606f9ad1cce0518dffae5b38d5c6 104K 454G 177M legacy
rpool/var/docker/ba9e8732c0c14341a1f20a01d44b43237fa8a4f2dd9abfc4b5c17061182f4198 158M 454G 310M legacy
rpool/var/docker/c25bcbd9be4a1467fb790a3b2a55ab2722ce0ac0e802a69849797bc14e1b06f4 824K 454G 402M legacy
rpool/var/docker/d91dd9229ca9c1f5f3abca276e64d5d9dd338c1cbf57dcca57b72fa9860100c6 1.98M 454G 91.1M legacy
rpool/var/docker/dde1751b5f2dc92c16bc14eb49845d20d5afc79c5e802a4f689e4fc0549a96c4 12.7M 454G 102M legacy
rpool/var/docker/e172e784d8125cf9d12e7caa228f175d356dc63c6f3716f413d4c623ee8d71bc 164K 454G 177M legacy
rpool/var/log 1.42M 454G 1.42M legacy
rpool/var/nfs 96K 454G 96K /var/lib/nfs
rpool/var/spool 96K 454G 96K /var/spool
rpool/var/tmp 128K 454G 128K legacy
$ sudo zfs list -t snapshot
NAME USED AVAIL REFER MOUNTPOINT
rpool/ROOT/ubuntu@install 134M - 428M -
rpool/var/docker/0aaacb3138f365e1d4c9d964a1b4a10492f83ec443ca87b9c6d0764f272daa4e@527162310 0 - 177M -
rpool/var/docker/109ae97aed9f6a3c2206b69bb6c8e47501fd81055bba01d46da683f5b98c928a@609333623 0 - 402M -
rpool/var/docker/369076459d433adc3864d6f8fc25939b5155220f434456e78b721f0170ffd756@297918631 0 - 177M -
rpool/var/docker/3d97fe01e33c6b131875009213dc48062e55761298c5064c587703fbd5d38ca9@852818813 0 - 402M -
rpool/var/docker/45f269bd976694049e6bc6de384a2ecee04cbf1fac0a1cf4b2b36b5e279f26fe@509857509 0 - 310M -
rpool/var/docker/4a2fcd050b468dae60876722da2ce32417c6db3feb9518d00ddc1c96af6ead25@235067456 0 - 102M -
rpool/var/docker/5d3515381e591ced9cc8eaa04e90fb59b06f817c381b5640c91aa2d3b26a9fd4@481486000 0 - 79.3M -
rpool/var/docker/6c64c52e51fea90aaf3348389f5211033d48c567df7d614a8f6f7a96ca5f8b26@748012719 0 - 177M -
rpool/var/docker/76f0d5d1c90273ae2cc66804cf76d7dabdc258982d77e0148b05651fb8870f7b@208507973 0 - 402M -
rpool/var/docker/81d8a1fdfac94e536022daf5bfdd2e97e79de9f20ca9c835b6397ed929de51ef-init@886456240 0 - 116K -
rpool/var/docker/8b4c060de084290d631cf3cc23e472b4a5996023844cf7f1991d0227363385f6@436875356 0 - 310M -
rpool/var/docker/91e9d8907939e828a3125b1191d29cce9c780b71e016a9d261a0fbef728980b0@23615240 0 - 72.2M -
rpool/var/docker/924cef4f8b52d6dff39e22de47f73813bbd86bd87e9d11ee248d23bef7ba74ed@969024219 0 - 177M -
rpool/var/docker/95bfeb74816304f20cb37ed58c261c75cc062fbe3cc52871885ad884cc4b79d1@809046251 0 - 100K -
rpool/var/docker/994e42058dbb89c7b9f54ce08f0373434bc0a3fa8e75daf0054c376014d2ef90@445200769 0 - 102M -
rpool/var/docker/a6b14f4ab9d7345dcd7bd5f9a43ffe1ecdabd0aaec72517b6f42b781dc7dc518@594635060 0 - 79.3M -
rpool/var/docker/ad974f4b93c83cdd16daa580c42c294f25083ad828fd4c89c7d6a3f0e9d4157b@93431459 0 - 310M -
rpool/var/docker/ae2cdec0dacb92dfcf36060601f88dbc7c41089c18afadc04d145f48c6d39553@456453904 0 - 90.3M -
rpool/var/docker/af7685f0366cde61798c189da6c806f3e09e187458cf32d51c98b34905479306@331942715 0 - 90.3M -
rpool/var/docker/b3ede8363841c8c0344e5d7e61078c1f6d79606f9ad1cce0518dffae5b38d5c6@499943365 0 - 177M -
rpool/var/docker/b90b20699bb19211ea0f9e00cfafd3a7d0a258a10a209d09b661b9d207d1ac4b@809108571 0 - 72.2M -
rpool/var/docker/ba9e8732c0c14341a1f20a01d44b43237fa8a4f2dd9abfc4b5c17061182f4198@523936063 0 - 310M -
rpool/var/docker/c25bcbd9be4a1467fb790a3b2a55ab2722ce0ac0e802a69849797bc14e1b06f4@765601723 0 - 402M -
rpool/var/docker/d91dd9229ca9c1f5f3abca276e64d5d9dd338c1cbf57dcca57b72fa9860100c6@729483018 0 - 91.1M -
rpool/var/docker/dde1751b5f2dc92c16bc14eb49845d20d5afc79c5e802a4f689e4fc0549a96c4@102507222 0 - 102M -
rpool/var/docker/e172e784d8125cf9d12e7caa228f175d356dc63c6f3716f413d4c623ee8d71bc@82883823 0 - 177M -