[Fix] The zfs binary not found

[jmauro]

Hello,

I am using a vanilla Debian testing distribution and trying to sync dataset between servers with different none root user. When trying to do it here is the problem:

root@XXXX:~# /data/repository/sanoid/syncoid --debug  --no-privilege-elevation  --sshkey=.ssh/backuser data_pool/data username@backup.server.net:zfs_pool/backup/homeland
DEBUG: SSHCMD: ssh    -i .ssh/backuser
DEBUG: checking availability of lzop on source...
DEBUG: checking availability of lzop on target...
DEBUG: checking availability of lzop on local machine...
DEBUG: checking availability of mbuffer on source...
DEBUG: checking availability of mbuffer on target...
DEBUG: checking availability of pv on local machine...
DEBUG: checking availability of zfs resume feature on source...
DEBUG: checking availability of zfs resume feature on target...
WARN: ZFS resume feature not available on target machine - sync will continue without resume support.
DEBUG: syncing source data_pool/data to target zfs_pool/backup/homeland.
DEBUG: getting current value of syncoid:sync on data_pool/data...
  zfs get -H syncoid:sync 'data_pool/data'
DEBUG: checking to see if zfs_pool/backup/homeland on ssh    -i .ssh/backuser -S /tmp/syncoid-username@backup.server.net-1619096918 username@backup.server.net is already in zfs receive using ssh    -i .ssh/backuser -S /tmp/syncoid-username@backup.server.net-1619096918 username@backup.server.net ps -Ao args= ...
DEBUG: checking to see if target filesystem exists using "ssh    -i .ssh/backuser -S /tmp/syncoid-username@backup.server.net-1619096918 username@backup.server.net  zfs get -H name ''"'"'zfs_pool/backup/homeland'"'"'' 2>&1 |"...
DEBUG: getting list of snapshots on data_pool/data using   zfs get -Hpd 1 -t snapshot guid,creation 'data_pool/data' |...
DEBUG: creating sync snapshot using "  zfs snapshot 'data_pool/data'@syncoid_XXXX_2021-04-22:13:08:41-GMT00:00
"...
DEBUG: target zfs_pool/backup/homeland does not exist.  Finding oldest available snapshot on source data_pool/data ...
DEBUG: getting estimated transfer size from source  using "  zfs send  -nvP 'data_pool/data@syncoid_XXXX_2021-04-20:23:10:22' 2>&1 |"...
DEBUG: sendsize = 90135876864
INFO: Sending oldest full snapshot data_pool/data@syncoid_XXXX_2021-04-20:23:10:22 (~ 83.9 GB) to new target filesystem:
DEBUG:  zfs send  'data_pool/data'@'syncoid_XXXX_2021-04-20:23:10:22' | pv -p -t -e -r -b -s 90135876864 | lzop  | mbuffer  -q -s 128k -m 16M 2>/dev/null | ssh    -i .ssh/backuser -S /tmp/syncoid-username@backup.server.net-1619096918 username@backup.server.net ' mbuffer  -q -s 128k -m 16M 2>/dev/null | lzop -dfc |  zfs receive   -F '"'"'zfs_pool/backup/homeland'"'"''
DEBUG: checking to see if zfs_pool/backup/homeland on ssh    -i .ssh/backuser -S /tmp/syncoid-username@backup.server.net-1619096918 username@backup.server.net is already in zfs receive using ssh    -i .ssh/backuser -S /tmp/syncoid-username@backup.server.net-1619096918 username@backup.server.net ps -Ao args= ...
bash: line 1: zfs: command not found
mbuffer: error: outputThread: error writing to <stdout> at offset 0x218000: Broken pipe
mbuffer: warning: error during output to <stdout>: Broken pipe
23.8MiB 0:00:00 [40.3MiB/s] [>                                                                                                                                                         ]  0%            CRITICAL ERROR:  zfs send  'data_pool/data'@'syncoid_XXXX_2021-04-20:23:10:22' | pv -p -t -e -r -b -s 90135876864 | lzop  | mbuffer  -q -s 128k -m 16M 2>/dev/null | ssh    -i .ssh/backuser -S /tmp/syncoid-username@backup.server.net-1619096918 username@backup.server.net ' mbuffer  -q -s 128k -m 16M 2>/dev/null | lzop -dfc |  zfs receive   -F '"'"'zfs_pool/backup/homeland'"'"'' failed: 32512 at /data/repository/sanoid/syncoid line 496.

And here is the environment I am using:

root@hyoga:~# cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux bullseye/sid"
NAME="Debian GNU/Linux"
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
root@hyoga:~# dpkg -l sanoid
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-==========================================================
ii  sanoid         2.0.3-4      all          Policy-driven ZFS snapshot management and replication tool