Execute rustic and sends a notification upon successful completion.

install-irustic.sh

#!/bin/sh
# irustic.sh - Execute rustic and sends a notification upon successful completion.
# SPDX-License-Identifier: MIT (https://ncurl.xyz/s/Kkn2DQsNR)

set -e

# rustic-rs/rustic
# https://github.com/rustic-rs/rustic

DIR_RUSTIC="/root/.config/rustic"
DIR_IRUSTIC="/root/.local/bin"

FILE_RUSTIC_CFG="$DIR_RUSTIC/rustic.toml"
FILE_IRUSTIC_SH="$DIR_IRUSTIC/irustic.sh"

# setup rustic
mkdir -p "$DIR_RUSTIC"
touch "$FILE_RUSTIC_CFG"
chmod 0600 "$FILE_RUSTIC_CFG"
chown root:root "$FILE_RUSTIC_CFG"

# setup irustic
mkdir -p "$DIR_IRUSTIC"
touch "$FILE_IRUSTIC_SH"
chmod 0700 "$FILE_IRUSTIC_SH"
chown root:root "$FILE_IRUSTIC_SH"

# generate password
# "_" prefix is used for marking it's auto generated.
IRUSTIC_PASSWORD="_$(openssl rand -hex 18)"

# setup rustic.toml
tee "$FILE_RUSTIC_CFG" <<EOF
[repository]
repository = "/root/.irustic"
password = "$IRUSTIC_PASSWORD" # openssl rand -hex 18

[forget]
keep-hourly = 20
keep-daily = 14
keep-weekly = 8
keep-monthly = 24
keep-yearly = 10

[[backup.snapshots]]
sources = ["/root"]

[[backup.snapshots]]
sources = ["/home"]

[[backup.snapshots]]
sources = ["/srv"]

[[backup.snapshots]]
sources = ["/opt"]

[[backup.snapshots]]
sources = ["/var/mail"]

[[backup.snapshots]]
sources = ["/var/www"]
EOF

echo "Please run init manually after set rustic.toml up:"
echo "rustic init"

irustic.sh

#!/bin/bash
# irustic.sh - Execute rustic and sends a notification upon successful completion.
# SPDX-License-Identifier: MIT (https://ncurl.xyz/s/Kkn2DQsNR)

set -Eeuo pipefail

# Setup irustic crontab:
# crontab -e
# 0 */2 * * * /root/.local/bin/irustic.sh >/dev/null 2>&1 # execute silently every 2 hours

# define notify destination
WEBHOOK_DISCORD="https://discordapp.com/api/webhooks/..."

# define notify function
NOTIFY() {
    local MESSAGE="$1"
    local DATE_NOW="$(date)"
    curl \
        -X POST \
        -H "Content-Type: application/json" \
        -d "{\"content\":\"iRustic has been executed at \`$DATE_NOW\`:\n$MESSAGE\"}" \
        "$WEBHOOK_DISCORD"
}

# trap 'RAISE $LINENO' ERR
RAISE() {
    local MESSAGE="\`$0\` exits with code \`$1\` on line number \`$2\`"
    NOTIFY "$MESSAGE"
    exit "$1"
}

# capture errors
trap 'RAISE "$?" "$LINENO"' ERR

# run the task
rustic backup

# run the notify
NOTIFY "Successful"