Whole linux server offsite backup using rclone (Ubuntu 22.04)

server-rclone.sh

#!/usr/bin/env bash
# Copyright (c) 2023, CaseSolved.co.uk

# Whole linux server offsite backup using rclone (Ubuntu 22.04)
# tar should achieve roughly 50% compression

read -r -d "" usage << EOM
arg1: rclone remote
arg2: remote directory
optional:
  -R  remove everything in remote dir first    !! be careful !!
EOM

exit_msg () {
  # $1 code, $2 msg
  >&2 echo "Error: '$2', code: $1"
  exit $1
}

exec_exit () {
  # command to run
  "$@"
  code=$?
  if [ $code != 0 ]; then
    exit_msg $code "$@"
  fi
}

if [ $# -lt 2 ]; then
  echo "$usage"
  exit_msg 1 "Illegal number of parameters"
fi

for arg in "$@"; do
  if [ "$arg" == "-R" ]; then
    remove_first="true"
    echo "WARNING: Removing content of remote directory first!!"
  elif [ -z ${remote+x} ]; then
    remote="$arg"
  elif [ -z ${root+x} ]; then
    root="$arg"
  fi
done

if [ -z ${root+x} ]; then
  echo "$usage"
  exit_msg 2 "remote directory not supplied"
fi

rclonex="rclone"
local_dir="/opt/backup"
remote_dir="$remote:$root"
backup_file="$(hostname)__$(date +%Y-%m-%d_%H-%M-%S).tar.gz"

excludes=(--exclude={lost+found,dev/*,proc/*,run/*,sys/*,tmp/*,cdrom/*,swap*,mnt/*,media/*,opt/backup/*})
# for testing:
#excludes=(--exclude={lost+found,dev/*,proc/*,run/*,sys/*,tmp/*,cdrom/*,swap*,mnt/*,media/*,opt/backup/*,var/*,usr/*,home/*})

echo "Remote: $remote_dir, file: $backup_file, excluding: ${excludes[@]}"

# Create backup dir
exec_exit mkdir -p "$local_dir"

# Check rclone remote dir is okay
# 0 ok, 3 dir not exist, else fail
$rclonex ls --human-readable "$remote_dir"
code=$?
if [ $code == 3 ]; then
  exec_exit $rclonex mkdir "$remote_dir"
  exec_exit $rclonex ls --human-readable "$remote_dir"
elif [ $code != 0 ]; then
  exit_msg $code "Remote connection failed"
fi

# sync mysql & wait
exec_exit service mysql restart
exec_exit sleep 60

# sync filesystem
exec_exit sync

# create backup
exec_exit cd "$local_dir" && tar --totals -czf "$backup_file" --directory=/ "${excludes[@]}" .

# print file size
exec_exit ls -lh "$local_dir/$backup_file"

# remove remote contents first
if [ "$remove_first" == "true" ]; then
  exec_exit $rclonex delete "$remote_dir"
fi

# move backup via rclone
exec_exit $rclonex --stats-log-level NOTICE --stats 30m move "$local_dir/$backup_file" "$remote_dir"