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@wallacebrf
wallacebrf authored Nov 11, 2021
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194 changes: 194 additions & 0 deletions plex_backup.sh
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#!/bin/bash

#create a lock file in the ramdisk directory to prevent more than one instance of this script from executing at once
if ! mkdir /volume1/web/logging/notifications/plex_docker_backup.lock; then
echo "Failed to acquire lock.\n" >&2
exit 1
fi
trap 'rm -rf /volume1/web/logging/notifications/plex_docker_backup.lock' EXIT #remove the lockdir on exit

#plex variables
plex_backup_dir="/volume1/Server2/Backups/Plex"
PMS_IP='192.168.1.200'
plex_installed_volume="volume1"
log_file_location="/volume1/web/logging/notifications/plex_docker_backup.txt"

#setup log file
echo "Beginning backup of
PLEX Data" |& tee $log_file_location

#determine DSM version to ensure the DSM6 vs DSM7 version of the synology PLEX package is downloaded
DSMVersion=$( cat /etc.defaults/VERSION | grep -i 'productversion=' | cut -d"\"" -f 2)

echo "" |& tee -a $log_file_location
MinDSMVersion=7.0
/usr/bin/dpkg --compare-versions "$MinDSMVersion" gt "$DSMVersion"
if [ "$?" -eq "0" ]; then
echo "DSM version is 6.x.x"
echo "Current DSM Version Installed: $DSMVersion"
plex_library_directory_location="/$plex_installed_volume/Plex"
folder_name_to_backup="Library"
plex_package_name="Plex Media Server"
plex_Preferences_loction="Plex/Library/Application Support/Plex Media Server/Preferences.xml"
else
echo "DSM version is 7.x.x"
echo "Current DSM Version Installed: $DSMVersion"
plex_library_directory_location="/$plex_installed_volume/PlexMediaServer"
folder_name_to_backup="AppData"
plex_package_name="PlexMediaServer"
plex_Preferences_loction="PlexMediaServer/AppData/Plex Media Server/Preferences.xml"
fi

#####################################
#get current date
#####################################

DATE=$(date +%m-%d-%Y);

#####################################
#Shutdown Plex before backing up plex data directory
#####################################

now=$(date +"%T")
echo "" |& tee -a $log_file_location
echo "$now - BACKING UP PLEX" |& tee -a $log_file_location

#####################################
#first terminate any active sessions
#####################################


MSG='PLEX_Backup_Process_In_Progress'
CLIENT_IDENT='123456'
token=$(cat "/$plex_installed_volume/$plex_Preferences_loction" | grep -oP 'PlexOnlineToken="\K[^"]+')
#Start by getting the active sessions

sessionURL="http://$PMS_IP:32400/status/sessions?X-Plex-Client-Identifier=$CLIENT_IDENT&X-Plex-Token=$token"
response=$(curl -i -k -L -s $sessionURL)
sessions=$(printf %s "$response"| grep '^<Session*'| awk -F= '$1=="id"{print $2}' RS=' '| cut -d '"' -f 2)

# Active sessions id's now stored in sessions variable, so convert to an array
set -f # avoid globbing (expansion of *).
array=(${sessions//:/ })
for i in "${!array[@]}"
do
echo "PLEX Active - Need to kill session: ${array[i]}" |& tee -a $log_file_location
killURL="http://$PMS_IP:32400/status/sessions/terminate?sessionId=${array[i]}&reason=$MSG&X-Plex-Client-Identifier=$CLIENT_IDENT&X-Plex-Token=$token"
# Kill it
response=$(curl -i -k -L -s $killURL)
# Get response
http_status=$(echo "$response" | grep HTTP | awk '{print $2}')
#echo $killURL |& tee -a $log_file_location
if [ $http_status -eq "200" ]
then
echo "Success with killing of stream ${array[i]}" |& tee -a $log_file_location
else
echo "Something went wrong here" |& tee -a $log_file_location
exit
fi
done
sleep 1
#####################################
#Stop plex package
#####################################
plex_status=$(/usr/syno/bin/synopkg is_onoff "$plex_package_name")
if [ -f "$plex_backup_dir/Library_$DATE.tar" ]; then
echo "Backup File $plex_backup_dir/Library_$DATE.tar already exists, PLEX shutdown aborting" |& tee -a $log_file_location
else
if [ "$plex_status" = "package $plex_package_name is turned on" ]; then
echo |& tee -a $log_file_location
echo "Stopping PLEX Media Server...." |& tee -a $log_file_location
/usr/syno/bin/synopkg stop "$plex_package_name" |& tee -a $log_file_location
sleep 1
else
echo "PLEX Media Server Already Shutdown" |& tee -a $log_file_location
fi
fi


#####################################
#Backup plex data directory
#####################################
plex_status=$(/usr/syno/bin/synopkg is_onoff "$plex_package_name")

if [ "$plex_status" = "package $plex_package_name is turned on" ]; then
echo "PLEX Media Server Shutdown Failed, Skipping PLEX Data Backup Process" |& tee -a $log_file_location
else
echo "PLEX Media Server Shutdown Successfuly" |& tee -a $log_file_location
if [ -f "$plex_backup_dir/Library_$DATE.tar" ]; then
echo "Backup File $plex_backup_dir/Library_$DATE.tar already exists, Skipping PLEX Data Backup Process" |& tee -a $log_file_location
else
cd $plex_library_directory_location
current_dir=$(pwd)
if [ "$current_dir" = "$plex_library_directory_location" ]; then
now=$(date +"%T")
echo "$now - Backing up PLEX \"$folder_name_to_backup\" Directory.... This may take a while" |& tee -a $log_file_location
tar cf Library_$DATE.tar "$folder_name_to_backup" |& tee -a $log_file_location
if [ -f "$plex_library_directory_location/Library_$DATE.tar" ]; then
now=$(date +"%T")
echo "$now - Backup of PLEX Data Directory Complete. Moving Library_$DATE.tar to $plex_backup_dir" |& tee -a $log_file_location
mv Library_$DATE.tar $plex_backup_dir/Library_$DATE.tar |& tee -a $log_file_location
if [ -f "$plex_backup_dir/Library_$DATE.tar" ]; then
now=$(date +"%T")
echo "$now - Moving Library_$DATE.tar Complete" |& tee -a $log_file_location
else
echo "Moving Library_$DATE.tar Failed, file does not exist in the destination directory" |& tee -a $log_file_location
fi
else
echo "backup file Library_$DATE.tar does not exist, something went wrong" |& tee -a $log_file_location
fi
else
echo "Could not change directory to $plex_library_directory_location, Skipping PLEX Data Backup Process" |& tee -a $log_file_location
fi
fi
fi

sleep 1


#####################################
#start PLEX Media Server Package
#####################################
plex_status=$(/usr/syno/bin/synopkg is_onoff "$plex_package_name")
if [ "$plex_status" = "package $plex_package_name is turned on" ]; then
echo "PLEX already active, skipping PLEX restart" |& tee -a $log_file_location
else
echo |& tee -a $log_file_location
echo "Starting PLEX Media Server...." |& tee -a $log_file_location
/usr/syno/bin/synopkg start "$plex_package_name" |& tee -a $log_file_location
sleep 1
fi

#####################################
#Cleanup activities
#####################################
#delete older un-needed backups. this will keep the last two backup files and delete all others

echo "" |& tee -a $log_file_location
cd $plex_backup_dir
current_dir=$(pwd)
if [ "$current_dir" = "$plex_backup_dir" ]; then
echo ""
echo "Cleaning up PLEX backup directory $plex_backup_dir" |& tee -a $log_file_location
ls -1t | tail -n +3 | xargs rm -f
else
echo "Could not change directory to $plex_backup_dir, canceling cleaning of PLEX backup directory $plex_backup_dir" |& tee -a $log_file_location
fi

now=$(date +"%T")
echo "" |& tee -a $log_file_location
echo "" |& tee -a $log_file_location
echo "$now - Backup Process Complete" |& tee -a $log_file_location

exit


#cleanup command explanation
#ls : List directory contents.
#-1t : 1(Number one) indicates that the output of ls should be one file per line. t indicates sort contents by modification time, newest first.
#tail : Output the last part of files.
#-n +x : output the last x NUM lines, instead of the last 10; or use -n +NUM to output starting with line NUM
#xargs : Build and execute command lines from standard input.
#rm -f : Remove files or directories. f indicates ignore nonexistent files and arguments, never prompt. It means that this command won't display any error messages if there are less than 10 files.
#| - It is a pipeline. It is generally a sequence of one or more commands separated by one of the control operators | or |&.
#So, the above command will delete the oldest files if there are more than 10 files in the current working directory. To verify how many files are in the directory after deleting the oldest file(s), just run:

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