98 lines
3.6 KiB
Bash
Executable file
98 lines
3.6 KiB
Bash
Executable file
#!/bin/bash
|
|
#
|
|
# backs up home using restic and encryption
|
|
# passphrases protected by GPG/Trezor hardware wallet
|
|
|
|
function do_backup() {
|
|
RUN_TIME="$(date +'%H:%M on %Y-%m-%d')"
|
|
echo "Starting on-login backup at ${RUN_TIME}"
|
|
echo ""
|
|
restic -r "${BACKUP_DEST}" backup \
|
|
--compression "${COMPRESSION}" \
|
|
--exclude-file="${EXCLUDES_FILE}" \
|
|
--one-file-system \
|
|
"${BACKUP_SOURCE}"
|
|
return $?
|
|
}
|
|
|
|
function read_enter() {
|
|
# used in cases where we require input before continuing/exiting
|
|
# ... but don't care what the input is
|
|
echo "Please press Enter to exit..."
|
|
read -r
|
|
}
|
|
|
|
set -x -o nounset -o pipefail
|
|
# start vars, what to backup/exclude and where to log
|
|
EXCLUDES_FILE="${HOME}/.restic_excludes"
|
|
BACKUP_SOURCE="${HOME}"
|
|
|
|
# misc options; compression / exit delay / retention period
|
|
COMPRESSION="${COMPRESSION:-auto}" # default auto, one of [auto, off, max]
|
|
EXIT_DELAY="${EXIT_DELAY:-3}"
|
|
KEEP="${KEEP:-7d}"
|
|
|
|
# define where to write backups - one at a time
|
|
# double slashes for remote volumes are significant to separate host from path
|
|
BACKUP_DEST="${BACKUP_DEST:-/raid1-evos/backups/restic}"
|
|
PASS_NAME="${PASS_NAME:-restic/raid1-evos}"
|
|
# PASS_NAME provides the path to the 'pass' object with the repo password
|
|
# ie: 'pass restic/t7usb' would show the password; provided/backed by Trezor wallet through GPG
|
|
# alts:
|
|
# BACKUP_DEST="/mnt/t7usb/restic"
|
|
# PASS_NAME="restic/t7usb"
|
|
# BACKUP_DEST="sftp://zeta.jlay.dev//backup/restic" # uses SATA zvol
|
|
# PASS_NAME="restic/zeta"
|
|
|
|
# set restic specific vars; performance but also auth
|
|
export RESTIC_READ_CONCURRENCY=8 # default 2
|
|
export RESTIC_PACK_SIZE=32 # default 16 MiB
|
|
export RESTIC_PROGRESS_FPS=1
|
|
# export RESTIC_PASSWORD_FILE="/rust/backups/workstation/.restic_password_to_zeta_podvol"
|
|
# redundant copy at /raid1-evos/backups/.workstation_restic_password_to_zeta_podvol
|
|
set +x
|
|
|
|
# ensure Trezor GPG agent is available/used for 'pass'
|
|
export GNUPGHOME="${HOME}/.gnupg/trezor"
|
|
|
|
echo "Getting repository password with 'pass'/GPG; check hardware wallet for verification"
|
|
RESTIC_PASSWORD=$(pass "${PASS_NAME}")
|
|
export RESTIC_PASSWORD
|
|
# declare and assign separately to avoid masking rc
|
|
# https://www.shellcheck.net/wiki/SC2155
|
|
|
|
# Check repository availability/consistency
|
|
restic check -r "$BACKUP_DEST" --no-lock --quiet
|
|
RESTIC_RC_CHECK=$?
|
|
|
|
if (( RESTIC_RC_CHECK == 0 )); then
|
|
# happy path - check of the destination passed, continue w/ backup
|
|
echo -e "\nRestic repository is available and passed checks, proceeding"
|
|
echo -e "\nCleaning up caches"
|
|
restic cache --cleanup
|
|
echo -e "\nCleaning backups older than $KEEP"
|
|
restic -r "$BACKUP_DEST" forget --prune --keep-within "$KEEP" --quiet
|
|
if do_backup; then
|
|
echo -e "\nBackup succeeded!"
|
|
else
|
|
echo -e "\nBackup failed!"
|
|
# require input before continuing/exiting
|
|
read_enter
|
|
fi
|
|
else
|
|
# empty line to separate our summary from the noise
|
|
echo ""
|
|
# unhappy path - check of the destination restic repo failed, and we didn't backup
|
|
if (( RESTIC_RC_CHECK == 3 )); then
|
|
echo "The repo doesn't seem to exist - cannot backup. Is '$BACKUP_DEST' mounted/available?"
|
|
else
|
|
echo "An unknown error occurred in checking '$BACKUP_DEST'."
|
|
echo "Review output, no assurances on consistency with any backups. Storage medium failures possible."
|
|
fi
|
|
# require input before continuing/exiting
|
|
read_enter
|
|
fi
|
|
echo "Exiting in $EXIT_DELAY seconds"
|
|
sleep "${EXIT_DELAY}"
|
|
|
|
unset RESTIC_PASSWORD
|