45 lines
1.9 KiB
Bash
45 lines
1.9 KiB
Bash
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#! /bin/sh
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# vim:ts=4:sw=4:
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set -e
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HOSTS="backup.niet.verweg.com"
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POOLS="system"
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BACKUP_PATH="${1}"
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for backup_host in $HOSTS; do
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if nc -w 5 $backup_host 22 2>&1 > /dev/null; then
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for pool in $POOLS; do
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last_snapshot=$(zfs list -H -o name -t snap -r -d 1 $pool | tail -1)
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last_send_snapshot_file="/var/db/backup/last-${backup_host}-${pool}"
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test -f ${last_send_snapshot_file} && last_send_snapshot=$(cat ${last_send_snapshot_file}) || last_send_snapshot=""
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if [ "${last_snapshot}" != "${pool}@${last_send_snapshot}" ]; then
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test -n "${last_send_snapshot}" && incremental_opt="-I ${pool}@${last_send_snapshot}"
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echo zfs send -n -vR ${incremental_opt} ${last_snapshot}
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zfs send -n -vR ${incremental_opt} ${last_snapshot} 2>&1 | \
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tail -1 | \
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tee /var/tmp/backup-${backup_host}-$$.log
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if [ -n "${BACKUP_PATH}" -a -d "${BACKUP_PATH}" ]; then
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zfs send -vR ${incremental_opt} ${last_snapshot} | \
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zstd -v -6 --long > ${BACKUP_PATH}/${pool}-${backup_host}-${last_snapshot}.zstd | \
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tee -a /var/tmp/backup-${backup_host}-$$.log
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echo "Stored backup in ${BACKUP_PATH}/${pool}-${backup_host}-${last_snapshot}.zstd"
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echo "rsync this to the other server and use as input"
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else
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zfs send -vR ${incremental_opt} ${last_snapshot} | \
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zstd -v -6 --long | \
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ssh ${backup_host} $pool | \
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tee -a /var/tmp/backup-${backup_host}-$$.log
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fi
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status=$(tail -1 /var/tmp/backup-${backup_host}-$$.log)
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echo ${last_snapshot} | sed -e "s/${pool}@//"
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if [ "${status}" = "OK" ]; then
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echo ${last_snapshot} | sed -e "s/${pool}@//" > ${last_send_snapshot_file}
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mv /var/tmp/backup-${backup_host}-$$.log /var/log/zfs-backup-${backup_host}-${pool}-$(date +%a).log
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fi
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else
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echo "Backup for $pool up to date for ${backup_host}"
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fi
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done
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else
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echo "WARNING: $backup_host not reachable over IPv6"
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fi
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done
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