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zfs mirror: delete old snapshots and bookmarks

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mwiegand 2022-08-09 19:59:24 +02:00
parent 3cd41adeaf
commit 706c4028f8
1 changed files with 17 additions and 4 deletions
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21
bundles/zfs-mirror/files/zfs-mirror
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@ -2,14 +2,14 @@
set -exu
ssh="ssh -o StrictHostKeyChecking=no -o ConnectTimeout=5 root@${server_ip}"
ssh="ssh -o ConnectTimeout=5 root@${server_ip}"
bookmark_prefix="auto-mirror_"
new_bookmark="$bookmark_prefix$(date +"%Y-%m-%d_%H:%M:%S")"
for dataset in $(zfs list -t filesystem -H -o name)
do
echo "MIRRORING $dataset"
if ! $ssh sudo zfs list -t filesystem -H -o name | grep -q "^$dataset$"
then
echo "CREATING PARENT DATASET..."
@ -17,11 +17,11 @@ do
fi
zfs snap "$dataset@$new_bookmark"
if zfs list -t bookmark -H -o name | grep "^$dataset#$bookmark_prefix" | wc -l | grep -q "^0$"
then
echo "INITIAL BACKUP"
# do in subshell, otherwise ctr+c will lead to 0 exitcode
# do in subshell, otherwise ctr+c will lead to 0 exitcode
$(zfs send -v "$dataset@$new_bookmark" | $ssh sudo zfs recv -F "$dataset" -o mountpoint=none)
else
echo "INCREMENTAL BACKUP"
@ -32,6 +32,19 @@ do
if [[ "$?" == "0" ]]
then
# delete old local bookmarks
for destroyable_bookmark in $(zfs list -t bookmark -H -o name "$dataset" | grep "^$dataset#$bookmark_prefix")
do
zfs destroy "$destroyable_bookmark"
done
# delete snapshots from bookmarks (except newest, even of not necessary; maybe for resuming tho)
for destroyable_snapshot in $($ssh sudo zfs list -t snapshot -H -o name "$dataset" | grep "^$dataset@$bookmark_prefix" | grep -v "$new_bookmark")
do
$ssh sudo zfs destroy "$destroyable_snapshot"
done
zfs bookmark "$dataset@$new_bookmark" "$dataset#$new_bookmark"
zfs destroy "$dataset@$new_bookmark"
echo "SUCCESS $dataset"