services/roles/backup/templates/backup.sh.j2

#!/usr/bin/env bash

set -e

set -a
. "{{ service_path }}/service.env"
set +a

duration_start=$(date +%s)
_duration_get () {
	duration_end=$(date +%s)
	duration=$((duration_end - duration_start))
}

hc_url="https://hc-ping.com/$HC_UID"
uptime_kuma_url="https://status.serguzim.me/api/push/$UPTIME_KUMA_TOKEN"
_hc_ping () {
	curl -fsSL --retry 3 "$hc_url$1" >/dev/null
}
_uptime_kuma_ping () {
	duration=_duration_get
	curl -fsSL --retry 3 \
		--url-query "status=$1" \
		--url-query "msg=$2" \
		--url-query "ping=${duration}000" \
		"$uptime_kuma_url" >/dev/null
}

_fail () {
	_hc_ping "/fail"
	_uptime_kuma_ping "down" "$1"
	exit 1
}
_success () {
	_hc_ping
	_uptime_kuma_ping "up" "backup successful"
}

_hc_ping "/start"

BACKUP_LOCATION="$(mktemp -d)"
export BACKUP_LOCATION
cd "$BACKUP_LOCATION" || exit

shopt -s nullglob
for file in "{{ service_path }}/backup.d/"*
do
	echo ""
	echo "running $file"
	time "$file" || _fail "fail while running $file"
done || true

cd "{{ service_path }}"
docker compose run --rm -v "$BACKUP_LOCATION:/backup/misc" app backup /backup || _fail "fail during restic backup"

_success

rm -rf "$BACKUP_LOCATION"

echo "forgetting old backups for $(hostname)"
docker compose run --rm app forget --host "$(hostname)" --prune \
	--keep-last 7 \
	--keep-daily 14 \
	--keep-weekly 16 \
	--keep-monthly 12 \
	--keep-yearly 2