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Improvments logic and messages

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m8in
2026-04-18 15:46:26 +02:00
parent 74f381cc1c
commit ad7a075a6c
2 changed files with 73 additions and 37 deletions
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script/host/zfs/composition-sync/sync-send.sh
+60 -27
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@@ -1,34 +1,70 @@
#!/bin/bash
function printFoundCommonSnapshot() {
local _ZFS _COMMON_SNAPSHOT_CANDIDATE
_ZFS="${1:?"printFoundCommonSnapshot(): Missing first parameter ZFS"}"
_COMMON_SNAPSHOT_CANDIDATE="${2:?"printFoundCommonSnapshot(): Missing second parameter COMMON_SNAPSHOT_CANDIDATE"}"
readonly _ZFS _COMMON_SNAPSHOT_CANDIDATE
function printNewestOrdinarySnapshot() {
local _ZFS _RECEIVERHOST
_ZFS="${1:?"printNewestOrdinarySnapshot(): Missing first parameter ZFS"}"
_RECEIVERHOST="${2:?"printNewestOrdinarySnapshot(): Missing second parameter RECEIVERHOST"}"
readonly _ZFS _RECEIVERHOST
local _FOUND_COMMON_SNAPSHOT
_FOUND_COMMON_SNAPSHOT=""
local _RESULT
_RESULT=$(zfs list -H -o name -S creation -t snapshot "${_ZFS}" | grep -vF '@SYNC' | head -n 1 | cut -d'@' -f2)
[ -n "${_RESULT}" ] \
&& echo "@${_RESULT}" \
&& return 0
echo "none"
return 1
}
function printNewestSyncSnapshot() {
local _ZFS _RECEIVERHOST
_ZFS="${1:?"printNewestSyncSnapshot(): Missing first parameter ZFS"}"
_RECEIVERHOST="${2:?"printNewestSyncSnapshot(): Missing second parameter RECEIVERHOST"}"
readonly _ZFS _RECEIVERHOST
local _RESULT
_RESULT=$(zfs list -H -o name -S creation -t snapshot "${_ZFS}" | grep -E "^${_ZFS}@SYNC_${_RECEIVERHOST}_" | head -n 1 | cut -d'@' -f2)
[ -n "${_RESULT}" ] \
&& echo "@${_RESULT}" \
&& return 0
echo "none"
return 1
}
function printFoundCommonSnapshot() {
local _ZFS _RECEIVERHOST _COMMON_SNAPSHOT_CANDIDATE
_ZFS="${1:?"printFoundCommonSnapshot(): Missing first parameter ZFS"}"
_RECEIVERHOST="${2:?"printFoundCommonSnapshot(): Missing second parameter RECEIVERHOST"}"
_COMMON_SNAPSHOT_CANDIDATE="${3:?"printFoundCommonSnapshot(): Missing third parameter COMMON_SNAPSHOT_CANDIDATE"}"
readonly _ZFS _RECEIVERHOST _COMMON_SNAPSHOT_CANDIDATE
# Nothing to do and nothing found
[ "${_COMMON_SNAPSHOT_CANDIDATE}" == "" ] \
&& return 1
while read -r _ROW
do
if [ "${_ROW}" == "${_ZFS}@${_COMMON_SNAPSHOT_CANDIDATE}" ]; then
_FOUND_COMMON_SNAPSHOT="${_ROW}"
break
echo "${_ROW}"
return 0
fi
done < <(zfs list -H -o name -S creation -t snapshot "${_ZFS}")
[ $? -eq 0 ] \
&& echo "${_FOUND_COMMON_SNAPSHOT}" \
&& return 0
echo "No common snapshot found:" >&2
echo " - snapshot candidate from receiver: @${_COMMON_SNAPSHOT_CANDIDATE}" >&2
echo " - newest ordinary snapshot of sender: $(printNewestOrdinarySnapshot "${_ZFS}" "${_RECEIVERHOST}")" >&2
echo " - newest sync snapshot of sender: $(printNewestSyncSnapshot "${_ZFS}" "${_RECEIVERHOST}")" >&2
return 1
}
function removeAllSyncSnapshotsExeptTheCommonOne() {
function removeReceiverhostsSyncSnapshotsExeptTheCommonOne() {
local _ZFS _RECEIVERHOST _COMMON_SNAPSHOT
_ZFS="${1:?"removeAllSyncSnapshotsExeptTheCommonOne(): Missing first parameter ZFS"}"
_RECEIVERHOST="${2:?"removeAllSyncSnapshotsExeptTheCommonOne(): Missing second parameter RECEIVERHOST"}"
_COMMON_SNAPSHOT="${3:?"removeAllSyncSnapshotsExeptTheCommonOne(): Missing third parameter COMMON_SNAPSHOT"}"
_ZFS="${1:?"removeReceiverhostsSyncSnapshotsExeptTheCommonOne(): Missing first parameter ZFS"}"
_RECEIVERHOST="${2:?"removeReceiverhostsSyncSnapshotsExeptTheCommonOne(): Missing second parameter RECEIVERHOST"}"
_COMMON_SNAPSHOT="${3:?"removeReceiverhostsSyncSnapshotsExeptTheCommonOne(): Missing third parameter COMMON_SNAPSHOT"}"
readonly _ZFS _RECEIVERHOST _COMMON_SNAPSHOT
while read -r _ROW
@@ -86,20 +122,16 @@ then
# Resume mode
if [ "${_RECEIVERS_SNAPSHOT}" == "RESUME" ]; then
sendResume "${_RESUME_TOKEN}"
# Exit preserving the code
exit $?
fi
# This common snapshot is the starting-point, if available.
_COMMON_SNAPSHOT="$(printFoundCommonSnapshot ${_ZFS} ${_RECEIVERS_SNAPSHOT})"
[ "${_COMMON_SNAPSHOT}" == "" ] \
&& [ "${_RECEIVERS_SNAPSHOT}" != "" ] \
&& echo "Requested snapshot '${_RECEIVERS_SNAPSHOT}' not available" \
! _COMMON_SNAPSHOT=$(printFoundCommonSnapshot "${_ZFS}" "${_RECEIVERHOST}" "${_RECEIVERS_SNAPSHOT}") \
&& echo "Failure in sync-send.sh: abort" >&2 \
&& exit 1
[ "${_COMMON_SNAPSHOT}" != "" ] \
&& removeAllSyncSnapshotsExeptTheCommonOne "${_ZFS}" "${_RECEIVERHOST}" "${_COMMON_SNAPSHOT}"
# Now create the first or a further sync-snapshot as end-point.
_NEW_SNAPSHOT="${_ZFS}@SYNC_${_RECEIVERHOST:?"RECEIVERHOST missing"}_$(date -u "+%Y-%m-%d_%H:%M:%S")"
@@ -109,14 +141,15 @@ then
&& exit 0
[ "${_COMMON_SNAPSHOT}" != "" ] \
&& removeAllSyncSnapshotsExeptTheCommonOne "${_ZFS}" "${_RECEIVERHOST}" "${_COMMON_SNAPSHOT}" \
&& removeReceiverhostsSyncSnapshotsExeptTheCommonOne "${_ZFS}" "${_RECEIVERHOST}" "${_COMMON_SNAPSHOT}" \
&& zfs snapshot "${_NEW_SNAPSHOT}" \
&& zfs send -c -R -I "${_COMMON_SNAPSHOT}" "${_NEW_SNAPSHOT}" \
&& exit 0
else
echo "Failure: At least one parameter is invalid" >&2
echo "Failure in sync-send.sh: At least one parameter is invalid." >&2
exit 1
fi
echo "Failure in sync-send.sh: Something unexpected happend." >&2
exit 1