22 lines
624 B
Bash
22 lines
624 B
Bash
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#!/bin/sh
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# Snapshot the current state of an HA Docker volume.
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# Usage: snapshot.sh <volume_name> [output_dir]
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#
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# Saves a tar.gz of the entire volume to output_dir (default: ./snapshots/).
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# Use reset.sh to restore.
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VOLUME="${1:?Usage: snapshot.sh <volume_name> [output_dir]}"
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OUTPUT_DIR="${2:-./snapshots}"
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SNAPSHOT_FILE="$OUTPUT_DIR/$VOLUME-$(date +%Y%m%d-%H%M%S).tar.gz"
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mkdir -p "$OUTPUT_DIR"
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printf 'Snapshotting volume %s -> %s\n' "$VOLUME" "$SNAPSHOT_FILE"
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docker run --rm \
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-v "$VOLUME":/data:ro \
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alpine \
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tar czf - -C / data \
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> "$SNAPSHOT_FILE"
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printf 'Snapshot saved: %s\n' "$SNAPSHOT_FILE"
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