Ansible container persistence helper for use with lesson 12, USYD CyberSecurity Bootcamp 2022

exzyle.sh

#!/usr/bin/env bash
#
# Written by ExZyle <exzyle@protonmail.com>
#
# Save this script into your VM, make sure you make it executable (chmod a+x exzyle.sh)
#
# From the same directory you save this script, run the following to get 
# some persistence out of your docker ansible container:
#
# docker run -it --rm -v `pwd`:/exzyle --entrypoint /exzyle/exzyle.sh cyberxsecurity/ansible
#

BACKUP_DIR=/exzyle/backups
BACKUP_FILE=$BACKUP_DIR/backup.tgz

                                         
echo "  ______         _______        __        "
echo " (______)       (_______)      (__)  ____ "
echo " (_)__    _   _     _(_) _   _  (_) (____)"
echo " (____)  (_)_(_)  _(_)  (_) (_) (_)(_)_(_)"
echo " (_)____   (_)   (_)____(_)_(_) (_)(__)__ "
echo " (______)(_) (_)(_______)(____)(___)(____)"
echo "                          __(_)           "
echo "                         (___)            "
echo -e "\nAnsible container persistence helper.\n"
echo -e "Written by ExZyle <exzyle@protonmail.com>"
echo -e "Use with lesson 12 with USYD CyberSecurity Bootcamp 2022.\n"
echo -e "Provided without warranty.\n"

echo "Checking if a backup already exists.."
if [ -f $BACKUP_FILE ]; then
    echo "Restoring from backup file..."
    tar -xvzpf $BACKUP_FILE -C /
    # /etc/hosts backup separately since tar extraction fails to override /etc/hosts.
    # Don't know why, don't care enough to investigate ;)
    echo "Restoring /etc/hosts..."
    cp $BACKUP_DIR/hosts /etc/hosts
else
    echo -e "No backup file found.\n\nYour first time? A backup file will be created when you 'exit' this shell."
fi

echo
bash

if [ ! -d $BACKUP_DIR ]; then
    echo "Could be your first backup, better make the directory..."
    mkdir $BACKUP_DIR
fi

echo -e "\nCreating a backup..."
tar cvzpf $BACKUP_FILE /etc/ansible ~/.ssh
echo "Backing up /etc/hosts..."
cp /etc/hosts $BACKUP_DIR/hosts 
echo "Done."