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NorbertM's questions

Martin Hope
NorbertM
Asked: 2020-02-20 17:46:36 +0800 CST
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Using bpipe plugin with Bareos Backup I get an error:

Fatal error: bpipe-fd: Pipe read error: ERR=Error 0

after

zfs send -R dpool/some_dataset

finished, executed from bash script.
But only iff dpool/some_dataset has child datasets (there is dpool/some_dataset/child1 for example). The -R option includes the child within the zfs send. This is my script zfs_create_send_snapshot.sh:

#!/bin/sh
#
# create recursive ZFS snapshot for given dataset and pipe
# replication stream to stdout, then delete snapshot

if [ -z "$1" ]; then
  (>&2 echo "ERROR: missing dataset name argument")
  exit 1
fi

DDD=`date +%y%m%d%H%M`
SNAPNAME=$1@bareos_${DDD}
(>&2 echo "creating ZFS snapshot ${SNAPNAME}")

zfs snapshot -r ${SNAPNAME}
(>&2 echo "sending ZFS snapshot ${SNAPNAME}")
zfs send -R ${SNAPNAME}
RC=$?
(>&2 echo "deleting ZFS snapshot ${SNAPNAME}")
(>&2 zfs destroy -r ${SNAPNAME})
exit ${RC}

It's executed by bareos fileset like this:

Plugin = "bpipe:file=/tmp/zfs_snap.bin:reader=/etc/bareos zfs_create_send_snapshot.sh dpool/some_dataset:writer=/etc/bareos/writer.sh /tmp/zfs_snap.bin"

The job fails with broken pipe error only if dpool/some_dataset has child zfs datasets. Otherwise everything is fine. And it seems to be only a side-effect: The backup job writes complete zfs snapshot stream to tape until -- just erroneously finishing by error. It happens on openindiana/illumos. Recent Bareos client 17.2 compiled from git sources.

illumos bareos openindiana