Restic Remote Backup Script to be called on Backup Server

_restic-remote-backup

#!/bin/bash
#
# 20231229/gj
# 20240208/gj   root user check
# 20260206/gj   add repository option

if [ -z "$1" ]; then
  cat >&2 <<-EOT
        syntax : $0 <host> [repository]
        purpose: - wol host if required
                 - do a restic backup to the ubuntu repository
                 - suspend again in case
        options:
          repository    remote repository (i.e. script extention) to use, default is `ubuntu`
        EOT
  exit -1
fi

[ "$EUID" -ne 0 ] && echo "must be run as root user!" >&2 && exit -1

REMOTE="$1"; shift
REPOSITORY="$1"; shift

[ -z "$REPOSITORY" ] && REPOSITORY="ubuntu"

IS_PINGABLE () {
   ping -c1 $1 >/dev/null
}

echo -n "pinging \"$REMOTE\" ..."
if ! IS_PINGABLE $REMOTE; then
  echo -en ", no answer.\nwaking \"$REMOTE\" ..." 
  _wakeonlan $REMOTE >/dev/null
  for i in {1..5}; do
    echo -n "[$i]"
    IS_PINGABLE $REMOTE && break        # true
  done; RC=$?
  echo -en "\nhost \"$REMOTE\""
  [ $RC -ne 0 ] && echo " don't wake up!" && exit 1
  WAKED=$i
fi
echo " is up."

echo "starting backup to \"$REPOSITORY\" ..."
ssh root@$REMOTE "/import/gateway/backup/restic/_restic.$REPOSITORY backup / $@ && [ "$WAKED" ] && echo "suspending ..." && systemctl suspend"
echo "backup finished."

if [ "$WAKED" ]; then
  echo -n "pinging \"$REMOTE\" ..."
  for i in {1..20}; do
    echo -n "[$i]"
    ! IS_PINGABLE $REMOTE && break      # true
    sleep 3
  done; RC=$?
  echo -en "\nhost \"$REMOTE\""
  [ $RC -ne 0 ] && echo " is still up!" || echo "is down again."