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Merge pull request 'dev' (#1) from dev into main

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Reviewed-on: https://git.bashclub.org/bashclub/zsync/pulls/1
This commit is contained in:
thorsten.spille 2023-11-29 19:55:08 +01:00
commit 1ed851a388
2 changed files with 44 additions and 29 deletions
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2
README.md
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@ -17,7 +17,7 @@ ZFS replication script by Thorsten Spille <thorsten@spille-edv.de>
#### Download and make executable
~~~
wget -q --no-cache -O /usr/bin/bashclub-zsync https://git.bashclub.org/bashclub/zsync/raw/branch/main/bashclub-zsync/usr/bin/bashclub-zsync
wget -q --no-cache -O /usr/bin/bashclub-zsync https://git.bashclub.org/bashclub/zsync/raw/branch/dev/bashclub-zsync/usr/bin/bashclub-zsync
chmod +x /usr/bin/bashclub-zsync
bashclub-zsync
~~~

59
bashclub-zsync/usr/bin/bashclub-zsync
View File

@ -16,6 +16,7 @@ wc=$(which wc)
tr=$(which tr)
sed=$(which sed)
zfs_auto_snapshot=$(which zfs-auto-snapshot)
rc=0
debug=
#### default config file, can be changed with parameter -c
@ -40,7 +41,7 @@ snapshot_filter="hourly|daily|weekly|monthly"
# minimum count of snapshots per filter to keep
min_keep=3
# number of zfs snapshots to keep on source (0 = snapshot function disabled)
# number of zfs snapshots to keep on source (0 or 1 = snapshot function disabled)
zfs_auto_snapshot_keep=0
# make snapshot via zfs-auto-snapshot before replication
@ -76,7 +77,7 @@ function log() {
# load config file
if [ -f $conf ]; then
log "Reading configuration $conf"
log "[INFO] Reading configuration $conf"
source $conf
else
mkdir -p $(dirname $conf)
@ -90,18 +91,18 @@ min_keep=$min_keep
zfs_auto_snapshot_keep=$zfs_auto_snapshot_keep
zfs_auto_snapshot_label=$zfs_auto_snapshot_label
EOF
log "Initial config file created. Please adjust and restart script. Exiting..."
log "[INFO] Initial config file created. Please adjust and restart script. Exiting..."
usage 0
fi
if [[ $source == "" ]]; then
log "source is empty, switching to local mode."
log "[INFO] source is empty, switching to local mode."
ssh=
sshport=
log "Configuration:\n\ttarget=$target\n\ttag=$tag\n\tsnapshot_filter=$snapshot_filter\n\tmin_keep=$min_keep\n"
log "[INFO] Configuration:\n\ttarget=$target\n\ttag=$tag\n\tsnapshot_filter=$snapshot_filter\n\tmin_keep=$min_keep\nzfs_auto_snapshot_keep=$zfs_auto_snapshot_keep\nzfs_auto_snapshot_label=$zfs_auto_snapshot_label\n"
else
sshport=-p$sshport
log "Configuration:\n\ttarget=$target\n\tsource=$source\n\tsshport=$sshport\n\ttag=$tag\n\tsnapshot_filter=$snapshot_filter\n\tmin_keep=$min_keep\n"
log "[INFO] Configuration:\n\ttarget=$target\n\tsource=$source\n\tsshport=$sshport\n\ttag=$tag\n\tsnapshot_filter=$snapshot_filter\n\tmin_keep=$min_keep\nzfs_auto_snapshot_keep=$zfs_auto_snapshot_keep\nzfs_auto_snapshot_label=$zfs_auto_snapshot_label\n"
fi
local_os_id=$($grep -E "^ID=" /etc/os-release | $cut -d'=' -f2)
@ -127,8 +128,8 @@ else
sshcipher=-cchacha20-poly1305@openssh.com
fi
include_list="Included datasets:\n"
exclude_list="Excluded datasets:\n"
include_list="[INFO] Included datasets:\n"
exclude_list="[INFO] Excluded datasets:\n"
IFS=$'\n'
for zvol in $($ssh $sshcipher $sshport $source "zfs get -H -o name,value,source -t filesystem,volume $tag"); do
name=$(echo $zvol | $cut -f1)
@ -155,7 +156,7 @@ else
fi
fi
if [ $zfs_auto_snapshot_keep -gt 0 ]; then
if [ $zfs_auto_snapshot_keep -gt 1 ]; then
log "[DEBUG] Running zfs-auto-snapshot"
$ssh $sshcipher $sshport $source "which zfs-auto-snapshot > /dev/null || exit 0 ; zfs-auto-snapshot --quiet --syslog --label=$zfs_auto_snapshot_label --keep=$zfs_auto_snapshot_keep //"
if [[ $snapshot_filter == "" ]]; then
@ -166,8 +167,9 @@ if [ $zfs_auto_snapshot_keep -gt 0 ]; then
fi
for name in "${syncvols[@]}"; do
log "Replicate $name"
if [[ $($ssh $sshcipher $sshport $source zfs get -H -o value type $name) == "filesystem" ]]; then
log "[INFO] Replicate $name"
fstype=$($ssh $sshcipher $sshport $source zfs get -H -o value type $name)
if [[ $fstype == "filesystem" ]]; then
mp=-xmountpoint
cm=-ocanmount=noauto
else
@ -175,7 +177,7 @@ for name in "${syncvols[@]}"; do
cm=
fi
if [[ $($ssh $sshcipher $sshport $source "zfs list -H -t snapshot -o name -S creation $name 2>/dev/null | grep -E \"$snapshot_filter\" | wc -l | tr -d ' '") -gt 0 ]]; then
if [[ $($ssh $sshcipher $sshport $source "zfs list -H -t snapshot -o name -S creation $name 2>/dev/null | grep -E \"@.*($snapshot_filter)\" | wc -l | tr -d ' '") -gt 0 ]]; then
IFS=$' '
if ! $zfs list -H $target/$name > /dev/null 2>&1 ; then
if [[ $debug == "-v" ]]; then log "[DEBUG] $target/$name does not exist"; fi
@ -183,7 +185,7 @@ for name in "${syncvols[@]}"; do
for part in $(echo $target/$(echo $name | $cut -d'/' -f1) | $sed "s/\// /g"); do
if [ $($zfs list $prefix$part > /dev/null 2>&1 ; echo $?) -gt 0 ]; then
if [[ $debug == "-v" ]]; then log "[DEBUG] $prefix$part does not exist"; fi
log "Creating $prefix$part"
log "[INFO] Creating $prefix$part"
$zfs create -o canmount=noauto $autosnap -p $prefix$part
fi
prefix="$prefix$part/"
@ -191,38 +193,50 @@ for name in "${syncvols[@]}"; do
if [[ $debug == "-v" ]]; then log "[DEBUG] $name - Start initial replication"; fi
IFS=$'\n'
for snap in $($ssh $sshcipher $sshport $source "zfs list -H -t snapshot -o name -S creation $name | grep -E \"$snapshot_filter\" | tail -1"); do
log "Start initial replication: $snap => $target/$(echo $name | $cut -d'/' -f1)"
for snap in $($ssh $sshcipher $sshport $source "zfs list -H -t snapshot -o name -S creation $name | grep -E \"@.*($snapshot_filter)\" | tail -1"); do
log "[INFO] Start initial replication: $snap => $target/$(echo $name | $cut -d'/' -f1)"
$ssh $sshcipher $sshport $source "zfs send -w -p $debug $snap" | $zfs receive $mp $cm -x $tag -x com.sun:auto-snapshot $debug -dF $target/$(echo $name | $cut -d'/' -f1)
if [ $? -gt $rc ]; then rc=1; log "[ERROR] initial replication to $target/$name failed."; fi
done
fi
if [[ $debug == "-v" ]]; then log "[DEBUG] $name - Start incremental replication"; fi
guid=$($zfs list -H -o guid -s creation -t snapshot $target/$name | $tail -1)
if [[ $guid != "" ]]; then
last=$($ssh $sshcipher $sshport $source "zfs list -H -o name,guid -t snapshot $name | grep $guid | tail -1 | cut -f1")
if [[ $last != "" ]]; then
IFS=$'\n'
if [[ $($zfs get -H -o value canmount $target/$name) != "noauto" ]]; then
if [[ $fstype == "filesystem" ]] && [[ $($zfs get -H -o value canmount $target/$name) != "noauto" ]]; then
$zfs set canmount=noauto $target/$name
fi
for snap in $($ssh $sshcipher $sshport $source "zfs list -H -o name,guid -s creation -t snapshot $name | grep -E \"$snapshot_filter\" | grep --after-context=200 $guid | grep -v $guid | cut -f1"); do
log "Replicating delta of $last => $snap to $target/$name"
for snap in $($ssh $sshcipher $sshport $source "zfs list -H -o name,guid -s creation -t snapshot $name | grep -E \"@.*($snapshot_filter)\" | grep --after-context=200 $guid | grep -v $guid | cut -f1"); do
log "[INFO] Replicating delta of $last => $snap to $target/$name"
$ssh $sshcipher $sshport $source "zfs send -w $debug -i $last $snap" | zfs receive -x $tag -x com.sun:auto-snapshot -F $debug $target/$name
if [ $? -gt $rc ]; then rc=1; log "[ERROR] incremental replication to $target/$name failed."; fi
last=$snap
done
else
log "[ERROR] No matching snapshot (guid: $guid) found on source filesystem. This can be outdated snapshots on target or a previously deleted and new created dataset $name on the source filesystem."
if [ $rc -eq 0 ]; then rc=1; fi
fi
else
log "[ERROR] No snapshot found on $target/$name to add incremental snapshots to. The target dataset (with all children) needs to be deleted and recreated via replication."
if [ $rc -eq 0 ]; then rc=1; fi
fi
if [[ $debug == "-v" ]]; then log "[DEBUG] $name - Start deletion of old snapshots"; fi
filter=$(echo -e $snapshot_filter | sed "s/|/\n/g")
IFS=$'\n'
for interval in $filter ; do
if [[ $debug == "-v" ]]; then log "[DEBUG] $name - Checking interval $interval"; fi
guid=$($ssh $sshcipher $sshport $source "zfs list -H -o guid,name -S creation -t snapshot $name | grep -E \"(.*)@(.*)$interval\" | cut -f1 | tail -1")
guid=$($ssh $sshcipher $sshport $source "zfs list -H -o guid,name -S creation -t snapshot $name | grep -E \"@.*$interval\" | cut -f1 | tail -1")
if [[ "$(echo -e "$guid" | sed 's/\n//g')" != "" ]]; then
snaps_to_delete=$($zfs list -H -o name,guid -S creation -t snapshot $target/$name | $grep -E "(.*)@(.*)$interval" | $grep --after-context=200 $guid | $grep -v $guid | $cut -f1)
snap_count=$($zfs list -H -o name,guid -S creation -t snapshot $target/$name | $grep -E "(.*)@(.*)$interval" | $wc -l | $tr -d ' ')
snaps_to_delete=$($zfs list -H -o name,guid -S creation -t snapshot $target/$name | $grep -E "@.*$interval" | $grep --after-context=200 $guid | $grep -v $guid | $cut -f1)
snap_count=$($zfs list -H -o name,guid -S creation -t snapshot $target/$name | $grep -E "@.*$interval" | $wc -l | $tr -d ' ')
for snap in $snaps_to_delete; do
if [[ $snap_count -gt $min_keep ]]; then
log "Deleting $snap"
log "[INFO] Deleting $snap"
if [[ $debug == "-v" ]]; then log "[DEBUG] $name - snap_count=$snap_count, min_keep=$min_keep"; fi
$zfs destroy $debug $snap
snap_count=$(expr $snap_count - 1)
@ -236,3 +250,4 @@ for name in "${syncvols[@]}"; do
if [[ $debug == "-v" ]]; then log "[DEBUG] $name - No snapshots found with filter $snapshot_filter"; fi
fi
done
exit $rc