Init backup_incus_volumes.sh

incus/backup_incus_volumes.sh

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+#!/usr/bin/env bash
+# vim: set tabstop=2 softtabstop=2 shiftwidth=2 expandtab:
+#
+# Script Name: backup_incus_volumes.sh
+# Description: This script backs up all Incus storage volumes
+#              listed in the 'default' storage pool to a specified
+#              backup directory. It is designed to be invoked by
+#              Borgmatic hooks.
+# Author: Benoit <forgejo@benoit.jp.net>
+# Website: benoit.jp.net
+# License: MIT
+#
+# Dependencies: incus
+# Written with the help of ChatGPT
+#
+
+# Strict mode
+set -euo pipefail
+
+# Set the backup directory
+BACKUP_DIR="/var/backups/incus"
+
+# Create the backup directory if it doesn't exist
+mkdir -p "$BACKUP_DIR"
+
+# Get the list of volumes and check for errors
+volumes=$(incus storage volume list default -f csv -c t,n,u 2>/dev/null)
+if [ $? -ne 0 ]; then
+  echo "Error: Failed to list storage volumes." >&2
+  exit 1
+fi
+
+# Check if there are any volumes to back up
+if [ -z "$volumes" ]; then
+  echo "No volumes found to back up."
+  exit 0
+fi
+
+# Initialize a success flag
+all_backups_successful=true
+
+# Loop through each volume and back it up
+while IFS=, read -r type name used; do
+  # Ignore images, containers, and unused volumes
+  if [[ "$type" == "image" || "$type" == "container" \
+    || "$type" == "virtual-machine" || "$used" -eq 0 ]]; then
+
+    continue
+  fi
+
+  echo "Backing up volume: $name"
+
+  if incus storage volume export default "$name" \
+    --compression=none --optimized-storage --volume-only \
+    "$BACKUP_DIR/${name}.tar" &> /dev/null; then
+
+    echo "Successfully backed up: $name"
+  else
+    echo "Error backing up volume: $name" >&2
+    all_backups_successful=false
+  fi
+done <<< "$volumes"
+
+# Final message based on backup success
+if $all_backups_successful; then
+  echo "Backup completed successfully. All volumes have been backed up to $BACKUP_DIR."
+else
+  echo "Backup completed with errors. Some volumes may not have been backed up."
+fi
+