Como hacer una copia integra del HA y de Raspbian, desde terminal…

Tal y como os prometimos, toca hacer un pequeño manual de como podemos hacer una copia de nuestra tarjeta MicroSD, sin tener que sacarla a otra tarjeta os USB, si en su momento decidimos instalar el Raspbian Lite, Hassbian o simplemente no queremos usar la aplicación de escritorio.

Para ello, os pasaremos un script, con el que se realizará todo de forma automática. Como ya comentamos en el manual anterior, necesitaremos introducir otra MicroSD, con un adaptador USB en uno de los puertos de la Pi.

Nos conectamos por SSH o abrimos un terminal desde la misma Pi, vamos a crear el siguiente script, con el comando:

[bash]

sudo nano Raspberry_Pi_Backup_Script.sh

[/bash]

En el que copiaremos las siguientes líneas:

[bash]
#!/bin/bash

# Usage instructions at http://www.megaleecher.net/Best_Raspberry_Pi_Hot_Backup_Shell_Script
# This version disables backup image compression as it takes too much time on Pi, to enable uncomment the relavent lines
# Setting up directories, Just change SUBDIR and DIR varibales below to get going

SUBDIR=raspberrypi_backups
DIR=/media/ExternalHd/$SUBDIR

echo “Starting RaspberryPI backup process!”

# First check if pv package is installed, if not, install it first
PACKAGESTATUS=`dpkg -s pv | grep Status`;

if [[ $PACKAGESTATUS == S* ]]
then
echo “Package ‘pv’ is installed.”
else
echo “Package ‘pv’ is NOT installed.”
echo “Installing package ‘pv’. Please wait…”
apt-get -y install pv
fi

# Check if backup directory exists
if [ ! -d “$DIR” ];
then
echo “Backup directory $DIR doesn’t exist, creating it now!”
mkdir $DIR
fi

# Create a filename with datestamp for our current backup (without .img suffix)
OFILE=”$DIR/backup_$(date +%Y%m%d_%H%M%S)”

# Create final filename, with suffix
OFILEFINAL=$OFILE.img

# First sync disks
sync; sync

# Shut down some services before starting backup process
echo “Stopping some services before backup.”
service apache2 stop
service mysql stop
service cron stop

# Begin the backup process, should take about 1 hour from 8Gb SD card to HDD
echo “Backing up SD card to USB HDD.”
echo “This will take some time depending on your SD card size and read performance. Please wait…”
SDSIZE=`blockdev –getsize64 /dev/mmcblk0`;
pv -tpreb /dev/mmcblk0 -s $SDSIZE | dd of=$OFILE bs=1M conv=sync,noerror iflag=fullblock

# Wait for DD to finish and catch result
RESULT=$?

# Start services again that where shutdown before backup process
echo “Start the stopped services again.”
service apache2 start
service mysql start
service cron start

# If command has completed successfully, delete previous backups and exit
if [ $RESULT = 0 ];
then
echo “Successful backup, previous backup files will be deleted.”
rm -f $DIR/backup_*.tar.gz
mv $OFILE $OFILEFINAL
echo “Backup is being tarred. Please wait…”
#tar zcf $OFILEFINAL.tar.gz $OFILEFINAL
# rm -rf $OFILEFINAL
echo “RaspberryPI backup process completed! FILE: $OFILEFINAL”
exit 0
# Else remove attempted backup file
else
echo “Backup failed! Previous backup files untouched.”
echo “Please check there is sufficient space on the HDD.”
rm -f $OFILE
echo “RaspberryPI backup process failed!”
exit 1
fi
[/bash]

 

Una vez creado el script, para ejecutarlo escribiremos:

[bash]

sudo ./Raspberry_Pi_Backup_Script.sh

[/bash]

…veremos el progreso de la copia y nos avisará cuando finalice.

Y eso es todo.

 

Fuente y Fuente GitHub

 

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