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Tweak zfs options

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This commit is contained in:
Tibo De Peuter 2023-10-07 11:20:27 +02:00
parent 33b1bd70f2
commit 8fc130d0a9
1 changed files with 24 additions and 13 deletions
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37
scripts/backup-zfs-dataset.sh
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@ -1,14 +1,15 @@
#!/bin/bash #!/bin/bash
# Create archived backups of zfs datasets, with support for incremental backups from automated snapshots. # Create archived backups of zfs datasets, with support for incremental backups from automated snapshots.
# Usage: backup-zfs-dataset [OPTIONS] <dataset> # Usage: backup-zfs-dataset [OPTIONS] <dataset> <destination>
usage() { usage() {
>&2 printf "Usage: %s [OPTIONS] <dataset>\n" "$0" >&2 printf "Usage: %s [OPTIONS] [<dataset> <destination>]\n" "$0"
>&2 printf "Options:\n" >&2 printf "Options:\n"
>&2 printf "\t-c --compression-level <level> \t Specify compression level (integer)\n" >&2 printf "\t-c --compression-level <level> \t Specify compression level (integer)\n"
>&2 printf "\t-s --dataset <dataset name> \t Specify dataset name\n" >&2 printf "\t-s --dataset <dataset name> \t Specify dataset name\n"
>&2 printf "\t-d --destination <path to directory> \t Specify destination\n" >&2 printf "\t-d --destination <path to directory> \t Specify destination\n"
>&2 printf "\t-m --max-size <size> \t Specify maximum size of archive parts\n" >&2 printf "\t-m --max-size <size> \t Specify maximum size of archive parts\n"
>&2 printf "\t-f --force \t Force overwriting existing backups if the backup already exists\n"
exit "${1:-1}" exit "${1:-1}"
} }
@ -16,40 +17,44 @@ usage() {
while [[ $# -gt 0 ]]; do while [[ $# -gt 0 ]]; do
case "${1}" in case "${1}" in
--compression_level | -c) -c | --compression_level)
if ! [[ "${2}" =~ -[[:digit:]] ]]; then if ! [[ "${2}" =~ -[[:digit:]] ]]; then
>&2 printf "Error: Invalid compression level: %s\n" "${2}" >&2 printf "Error: Invalid compression level: '%s'\n" "${2}"
usage usage
fi fi
compression_level="${2}" compression_level="${2}"
shift 2 shift 2
;; ;;
--dataset | -s) -s | --dataset)
if ! [ -n "${2}" ]; then if ! [ -n "${2}" ]; then
>&2 printf "Error: Invalid dataset: %s\n" "${2}" >&2 printf "Error: Invalid dataset: '%s'\n" "${2}"
usage usage
fi fi
dataset="${2}" dataset="${2}"
shift 2 shift 2
;; ;;
--destination | -d) -d | --destination)
if ! [ -d "${2}" ]; then if ! [ -d "${2}" ]; then
>&2 printf "Error: Destination directory does not exist: %s\n" "${2}" >&2 printf "Error: Specified destination does not exist: '%s'\n" "${2}"
usage usage
fi fi
destination="${2}" destination="${2}"
shift 2 shift 2
;; ;;
--max-size | -m) -m | --max-size)
if ! [[ "${2}" =~ [[:digit:]](K|M|G) ]]; then if ! [[ "${2}" =~ [[:digit:]](K|M|G) ]]; then
>&2 printf "Error: Invalid maximum size: %s\n" "${2}" >&2 printf "Error: Invalid maximum size: '%s'\n" "${2}"
usage usage
fi fi
max_size="${2}" max_size="${2}"
shift 2 shift 2
;; ;;
-f | --force)
force_create_manual_backup=1
shift 1
;;
*) *)
>&2 printf "Error: Invalid option: %s\n" "${1}" >&2 printf "Error: Invalid option: '%s'\n" "${1}"
usage usage
;; ;;
esac esac
@ -57,8 +62,14 @@ done
# Check arguments. # Check arguments.
if [ -z "${dataset}" ]; then if [[ -z "${dataset:=${1}}" || -z "${destination:=${2}}" ]]; then
>&2 printf "Error: You need to specify a dataset.\n" >&2 printf "Error: You need to specify a dataset and a destination.\n"
usage
elif [ -z "${dataset}" ]; then
>&2 printf "Error: Invalid dataset: '%s'\n" "${1}"
usage
elif ! [ -d "${destination}" ]; then
>&2 printf "Error: Specified destination does not exist: '%s'\n" "${2}"
usage usage
fi fi