homelab/roles/matrix/files/matrix.backup.sh

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#!/usr/bin/env bash
# Conduit
data_dir='/mnt/data1/matrix/conduit'
snapshot_dir="${data_dir}.snapshot"
# Read-only snapshot for atomic backup
btrfs subvolume snapshot -r "$data_dir" "$snapshot_dir" || exit $?
/usr/local/bin/restic backup "$snapshot_dir"
# Always remove snapshot subvolume, even if restic fails
btrfs subvolume delete "$snapshot_dir"