diff options
Diffstat (limited to 'zb-pull')
| -rwxr-xr-x | zb-pull | 57 |
1 files changed, 57 insertions, 0 deletions
@@ -1,2 +1,59 @@ #!/bin/sh +if [[ -z "$1" || -z "$2" || -z "$3" ]] ; then + echo "usage: $0 <ssh_remote> <remote_zfs_object> <local_zfs_object>" >&2 + exit 1 +fi + +timestamp () { + t="`echo \"$1\" |sed -ne 's/^.*@zb-//p' |tr 'p_' '+ '`" + [[ -z "$t" ]] && return 1 + date --date="$t" +%s + return $? +} + + +ssh_remote="$1" +remote_zfs="$2" +local_zfs="$3" + +# find newest available and newest common snapshot +newest="N/A" +newest_common="N/A" + +ssh $ssh_remote "zfs list -t snapshot -r -d 1 -H \"${remote_zfs}\" " | while read l ; do + #link unix timestamps + unixtime=`timestamp "$l"` || continue + echo "$unixtime" "$l" +done | sort -n | while read l ; do + curtime=${l%% *} + snapname=${l#* } + + newest="$snapname" + + if zfs list -t snapshot -H "${local_zfs}@zb-${snapname}" >/dev/null ; then + newest_common="$snapname" + fi +done + +# some checks + +if [ "$newest" = "N/A" ] ; then + echo "$0: no remote snapshots available to pull" >&2 + exit 2 +fi + +if [ "$newest" = "$newest_common" ] ; then + echo "$0: nothing new to pull" >&2 + exit 0 +fi + +if [ "$newest_common" = "N/A" ] ; then + #do a full send + ssh $ssh_remote "zfs send \"${remote_zfs}@zb-${newest}\"" | zfs recv -F "${local_zfs}" + exit $? +else + #do incremental send + ssh $ssh_remote "zfs send -I \"${remote_zfs}@zb-${newest_common}\" \"${remote_zfs}@zb-${$newest}\"" | zfs recv -F "${local_zfs}" + exit $? +fi |