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46 lines
1.6 KiB
Bash
46 lines
1.6 KiB
Bash
#!/bin/bash
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# @param $1 hostname from which backup should be pulled
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# error counter
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errors=0
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source_host="backup@$1"
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source_machine_id="$( (ssh "$source_host" sha256sum /etc/machine-id) | head -c 64)" || exit 1
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source_path="/Backups/$source_machine_id/"
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directories="$(ssh "$source_host" find "$source_path" -maxdepth 1 -type d)" || exit 1
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for backup_type_dir in $directories; do
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if [ "$backup_type_dir" != "$source_path" ]; then
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# folder which contains versions
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versions_dir="$backup_type_dir/versions/"
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# link name of last backup
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latest_version_link="$backup_type_dir/latest"
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# this folder contains the last backup
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latest_version_dir="$versions_dir$(date '+%Y%m%d%H%M%S')/"
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# this is the link name of the previous version
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previous_version_link="$backup_type_dir/previous"
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# source path of the backup files:
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remote_source_path="$source_host:$latest_version_link/"
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#identifiy previous version
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versions=( $(basename -a "$versions_dir"*/ | sort) )|| exit 1
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last_version="${versions[-1]}" || exit 1
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previous_version_dir="$versions_dir$last_version/"
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# create working folders:
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mkdir -vp "$latest_version_dir"
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# delete links
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rm -v "$latest_version_link"
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rm -v "$previous_version_link"
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# create links
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ln -vs "$latest_version_dir" "$latest_version_link" || exit 1
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ln -vs "$previous_version_dir" "$previous_version_link"|| exit 1
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# do backup:
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rsync -abP --delete --delete-excluded --rsync-path="sudo rsync" --link-dest="$previous_version_link" "$remote_source_path" "$latest_version_link" || ((errors+=1));
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fi
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done
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exit $errors;
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