Update backup script
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3895DD267CA11BA9
2 changed files with 52 additions and 31 deletions
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@ -1,5 +1,4 @@
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#!/usr/bin/env bash
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#!/bin/bash
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# Check for required argument
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if [ $# -ne 1 ]; then
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@ -10,6 +9,7 @@ fi
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# Configuration
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SNAPPER_CONFIG="$1"
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BACKUP_DESCRIPTION="btrfs-backup"
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# Get the actual snapshot location from snapper config
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SOURCE_PATH=$(sudo snapper -c "$SNAPPER_CONFIG" get-config | grep '^SUBVOLUME' | cut -d'=' -f2 | tr -d '"'| awk {'print $3'})
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@ -26,17 +26,22 @@ if [ ! -d "$SNAPSHOT_PATH" ]; then
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exit 1
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fi
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# Create new snapshot with backup description
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NEW_SNAPSHOT=$(sudo snapper -c "$SNAPPER_CONFIG" create --description "$BACKUP_DESCRIPTION" --print-number)
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if [ -z "$NEW_SNAPSHOT" ]; then
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echo "ERROR: Failed to create new snapshot"
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exit 1
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fi
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# Get latest snapshot number from snapper
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LATEST_SNAPSHOT=$(sudo snapper -c "$SNAPPER_CONFIG" list | tail -n 1 | awk '{print $1}')
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HOSTNME=$(hostname)
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REMOTE_HOST="root@synology"
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BASE_DEST_PATH="/volume1/BTRFS_Receives/`hostname`/${SNAPPER_CONFIG}"
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DEST_PATH="/volume1/BTRFS_Receives/`hostname`/${SNAPPER_CONFIG}/${LATEST_SNAPSHOT}"
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DEST_PATH="/volume1/BTRFS_Receives/`hostname`/${SNAPPER_CONFIG}/${NEW_SNAPSHOT}"
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STATE_FILE="/var/lib/snapper-backup-${SNAPPER_CONFIG}.state"
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LOG_FILE="/var/log/snapper-backup-${SNAPPER_CONFIG}.log"
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KEEP_SNAPSHOTS=5
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# Get latest successful transfer number
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# Get latest successful transfer number from snapshots with backup description
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LAST_TRANSFERRED=$(cat "$STATE_FILE" 2>/dev/null || echo "")
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# Ensure we exit on any error
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@ -73,24 +78,40 @@ verify_remote() {
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# Function to get remote snapshots
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get_remote_snapshots() {
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ssh "$REMOTE_HOST" "find '$BASE_DEST_PATH' -maxdepth 2 -type d -name 'snapshot*' | sort -n"
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# ssh "$REMOTE_HOST" "btrfs subvolume list /volume1/ -t | grep $HOSTNAME | grep $SNAPPER_CONFIG"
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ssh "$REMOTE_HOST" "find '$BASE_DEST_PATH' -maxdepth 1 -type d -name '[0-9]*' | sort -n"
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}
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# Function to cleanup old remote snapshots
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cleanup_remote_snapshots() {
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local snapshots=($(get_remote_snapshots))
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local count=${#snapshots[@]}
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# Function to get local backup snapshots
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get_local_snapshots() {
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sudo snapper -c "$SNAPPER_CONFIG" list | grep "$BACKUP_DESCRIPTION" | awk '{print $1}' | sort -n
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}
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# Function to cleanup old snapshots both locally and remotely
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cleanup_snapshots() {
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local local_snapshots=($(get_local_snapshots))
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local remote_snapshots=($(get_remote_snapshots))
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local count=${#local_snapshots[@]}
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if [ $count -gt $KEEP_SNAPSHOTS ]; then
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local to_delete=$((count - KEEP_SNAPSHOTS))
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log "Cleaning up $to_delete old snapshots on remote system"
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log "Cleaning up $to_delete old snapshots both locally and remotely"
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for ((i=0; i<$to_delete; i++)); do
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local snapshot="${snapshots[$i]}"
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local snapshot="${local_snapshots[$i]}"
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# Delete remote snapshot first
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if ssh "$REMOTE_HOST" "[ -d '$BASE_DEST_PATH/$snapshot' ]"; then
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log "Deleting remote snapshot: $snapshot"
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ssh "$REMOTE_HOST" "btrfs subvolume delete '$snapshot'" || \
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log "WARNING: Failed to delete snapshot $snapshot"
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ssh "$REMOTE_HOST" "btrfs subvolume delete '$BASE_DEST_PATH/$snapshot/snapshot'" || \
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log "WARNING: Failed to delete remote snapshot $snapshot"
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ssh "$REMOTE_HOST" "rm -rf '$BASE_DEST_PATH/$snapshot'" || \
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log "WARNING: Failed to cleanup remote snapshot directory $snapshot"
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fi
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# Then delete local snapshot
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log "Deleting local snapshot: $snapshot"
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sudo snapper -c "$SNAPPER_CONFIG" delete "$snapshot" || \
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log "WARNING: Failed to delete local snapshot $snapshot"
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done
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fi
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}
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@ -98,60 +119,60 @@ cleanup_remote_snapshots() {
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# Start backup process
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log "Starting backup for snapper config: $SNAPPER_CONFIG"
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log "Using snapshot path: $SNAPSHOT_PATH"
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log "Created new snapshot: $NEW_SNAPSHOT"
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# Verify remote connectivity first
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verify_remote
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# Verify snapshots exist
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verify_snapshot "$LATEST_SNAPSHOT" || exit 1
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verify_snapshot "$NEW_SNAPSHOT" || exit 1
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if [ -n "$LAST_TRANSFERRED" ]; then
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verify_snapshot "$LAST_TRANSFERRED" || exit 1
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fi
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# Exit if no new snapshots to transfer
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if [ "$LAST_TRANSFERRED" = "$LATEST_SNAPSHOT" ]; then
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log "No new snapshots to transfer"
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exit 0
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fi
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# Create destination directory if it doesn't exist
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ssh "$REMOTE_HOST" "mkdir -p '$DEST_PATH'"
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# Perform the transfer
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if [ -z "$LAST_TRANSFERRED" ]; then
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# First time backup - full send
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log "Performing full send of snapshot $LATEST_SNAPSHOT"
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sudo btrfs send "$SNAPSHOT_PATH/$LATEST_SNAPSHOT/snapshot" | \
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log "Performing full send of snapshot $NEW_SNAPSHOT"
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sudo btrfs send "$SNAPSHOT_PATH/$NEW_SNAPSHOT/snapshot" | \
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pv --bytes | \
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ssh "$REMOTE_HOST" "btrfs receive '$DEST_PATH'" && {
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sudo echo "$LATEST_SNAPSHOT" | sudo tee "$STATE_FILE"
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echo "$NEW_SNAPSHOT" | sudo tee "$STATE_FILE"
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log "Full send completed successfully"
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} || {
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log "ERROR: Full send failed"
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sudo snapper -c "$SNAPPER_CONFIG" delete "$NEW_SNAPSHOT"
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exit 1
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}
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else
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# Incremental send
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log "Performing incremental send from $LAST_TRANSFERRED to $LATEST_SNAPSHOT"
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log "Performing incremental send from $LAST_TRANSFERRED to $NEW_SNAPSHOT"
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sudo btrfs send -p "$SNAPSHOT_PATH/$LAST_TRANSFERRED/snapshot" \
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"$SNAPSHOT_PATH/$LATEST_SNAPSHOT/snapshot" | \
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"$SNAPSHOT_PATH/$NEW_SNAPSHOT/snapshot" | \
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pv --bytes | \
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ssh "$REMOTE_HOST" "btrfs receive '$DEST_PATH'" && {
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sudo echo "$LATEST_SNAPSHOT" | sudo tee "$STATE_FILE"
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echo "$NEW_SNAPSHOT" | sudo tee "$STATE_FILE"
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log "Incremental send completed successfully"
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} || {
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log "ERROR: Incremental send failed"
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sudo snapper -c "$SNAPPER_CONFIG" delete "$NEW_SNAPSHOT"
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exit 1
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}
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fi
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# Cleanup old snapshots if transfer was successful
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cleanup_remote_snapshots
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cleanup_snapshots
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# Verify remote snapshots
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log "Current remote snapshots:"
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get_remote_snapshots | sudo tee -a "$LOG_FILE"
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log "Current local snapshots:"
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get_local_snapshots | sudo tee -a "$LOG_FILE"
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# Final verification
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if ! ssh "$REMOTE_HOST" "btrfs subvolume show '$DEST_PATH/snapshot'" &>/dev/null; then
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log "WARNING: Final verification failed"
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@ -1 +1 @@
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Subproject commit 8ed82c9afaac6359cf4603196f7a5bd4b399a4b5
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Subproject commit 26552d8bade6fa39188ebf68e9ffa1a8dcd75108
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