NextcloudBackup.sh

   1 #!/bin/bash
   2
   3 #
   4 # Bash script for creating backups of Nextcloud.
   5 #
   6 # Version 1.0.0
   7 #
   8 # Usage:
   9 #       - With backup directory specified in the script:  ./NextcloudBackup.sh
  10 #       - With backup directory specified by parameter: ./NextcloudBackup.sh <BackupDirectory> (e.g. ./NextcloudBackup.sh /media/hdd/nextcloud_backup)
  11 #
  12 # The script is based on an installation of Nextcloud using nginx and MariaDB, see https://decatec.de/home-server/nextcloud-auf-ubuntu-server-18-04-lts-mit-nginx-mariadb-php-lets-encrypt-redis-und-fail2ban/
  13 #
  14
  15 #
  16 # IMPORTANT
  17 # You have to customize this script (directories, users, etc.) for your actual environment.
  18 # All entries which need to be customized are tagged with "TODO".
  19 #
  20
  21 # Variables
  22 backupMainDir=$1
  23
  24 if [ -z "$backupMainDir" ]; then
  25         # TODO: The directory where you store the Nextcloud backups (when not specified by args)
  26     backupMainDir='/media/hdd/nextcloud_backup'
  27 fi
  28
  29 echo "Backup directory: $backupMainDir"
  30
  31 currentDate=$(date +"%Y%m%d_%H%M%S")
  32
  33 # The actual directory of the current backup - this is a subdirectory of the main directory above with a timestamp
  34 backupdir="${backupMainDir}/${currentDate}/"
  35
  36 # TODO: The directory of your Nextcloud installation (this is a directory under your web root)
  37 nextcloudFileDir='/var/www/nextcloud'
  38
  39 # TODO: The directory of your Nextcloud data directory (outside the Nextcloud file directory)
  40 # If your data directory is located under Nextcloud's file directory (somewhere in the web root), the data directory should not be a separate part of the backup
  41 nextcloudDataDir='/var/nextcloud_data'
  42
  43 # TODO: The directory of your Nextcloud's local external storage.
  44 # Uncomment if you use local external storage.
  45 #nextcloudLocalExternalDataDir='/var/nextcloud_external_data'
  46
  47 # TODO: The service name of the web server. Used to start/stop web server (e.g. 'systemctl start <webserverServiceName>')
  48 webserverServiceName='nginx'
  49
  50 # TODO: Your web server user
  51 webserverUser='www-data'
  52
  53 # TODO: The name of the database system (ome of: mysql, mariadb, postgresql)
  54 databaseSystem='mariadb'
  55
  56 # TODO: Your Nextcloud database name
  57 nextcloudDatabase='nextcloud_db'
  58
  59 # TODO: Your Nextcloud database user
  60 dbUser='nextcloud_db_user'
  61
  62 # TODO: The password of the Nextcloud database user
  63 dbPassword='mYpAsSw0rd'
  64
  65 # TODO: The maximum number of backups to keep (when set to 0, all backups are kept)
  66 maxNrOfBackups=0
  67
  68 # File names for backup files
  69 # If you prefer other file names, you'll also have to change the NextcloudRestore.sh script.
  70 fileNameBackupFileDir='nextcloud-filedir.tar.gz'
  71 fileNameBackupDataDir='nextcloud-datadir.tar.gz'
  72
  73 # TOOD: Uncomment if you use local external storage
  74 #fileNameBackupExternalDataDir='nextcloud-external-datadir.tar.gz'
  75
  76 fileNameBackupDb='nextcloud-db.sql'
  77
  78 # Function for error messages
  79 errorecho() { cat <<< "$@" 1>&2; }
  80
  81 function DisableMaintenanceMode() {
  82         echo "Switching off maintenance mode..."
  83         sudo -u "${webserverUser}" php ${nextcloudFileDir}/occ maintenance:mode --off
  84         echo "Done"
  85         echo
  86 }
  87
  88 # Capture CTRL+C
  89 trap CtrlC INT
  90
  91 function CtrlC() {
  92         read -p "Backup cancelled. Keep maintenance mode? [y/n] " -n 1 -r
  93         echo
  94
  95         if ! [[ $REPLY =~ ^[Yy]$ ]]
  96         then
  97                 DisableMaintenanceMode
  98         else
  99                 echo "Maintenance mode still enabled."
 100         fi
 101
 102         exit 1
 103 }
 104
 105 #
 106 # Check for root
 107 #
 108 if [ "$(id -u)" != "0" ]
 109 then
 110         errorecho "ERROR: This script has to be run as root!"
 111         exit 1
 112 fi
 113
 114 #
 115 # Check if backup dir already exists
 116 #
 117 if [ ! -d "${backupdir}" ]
 118 then
 119         mkdir -p "${backupdir}"
 120 else
 121         errorecho "ERROR: The backup directory ${backupdir} already exists!"
 122         exit 1
 123 fi
 124
 125 #
 126 # Set maintenance mode
 127 #
 128 echo "Set maintenance mode for Nextcloud..."
 129 sudo -u "${webserverUser}" php ${nextcloudFileDir}/occ maintenance:mode --on
 130 echo "Done"
 131 echo
 132
 133 #
 134 # Stop web server
 135 #
 136 echo "Stopping web server..."
 137 systemctl stop "${webserverServiceName}"
 138 echo "Done"
 139 echo
 140
 141 #
 142 # Backup file directory
 143 #
 144 echo "Creating backup of Nextcloud file directory..."
 145 tar -cpzf "${backupdir}/${fileNameBackupFileDir}" -C "${nextcloudFileDir}" .
 146 echo "Done"
 147 echo
 148
 149 #
 150 # Backup data directory
 151 #
 152 echo "Creating backup of Nextcloud data directory..."
 153 tar -cpzf "${backupdir}/${fileNameBackupDataDir}"  -C "${nextcloudDataDir}" .
 154 echo "Done"
 155 echo
 156
 157 # Backup local external storage.
 158 # Uncomment if you use local external storage
 159 #echo "Creating backup of Nextcloud local external storage directory..."
 160 #tar -cpzf "${backupdir}/${fileNameBackupExternalDataDir}"  -C "${nextcloudLocalExternalDataDir}" .
 161 #echo "Done"
 162 #echo
 163
 164 #
 165 # Backup DB
 166 #
 167 if [ "${databaseSystem,,}" = "mysql" ] || [ "${databaseSystem,,}" = "mariadb" ]; then
 168         echo "Backup Nextcloud database (MySQL/MariaDB)..."
 169
 170         if ! [ -x "$(command -v mysqldump)" ]; then
 171                 errorecho "ERROR: MySQL/MariaDB not installed (command mysqldump not found)."
 172                 errorecho "ERROR: No backup of database possible!"
 173         else
 174                 mysqldump --single-transaction -h localhost -u "${dbUser}" -p"${dbPassword}" "${nextcloudDatabase}" > "${backupdir}/${fileNameBackupDb}"
 175         fi
 176
 177         echo "Done"
 178         echo
 179 elif [ "${databaseSystem,,}" = "postgresql" ]; then
 180         echo "Backup Nextcloud database (PostgreSQL)..."
 181
 182         if ! [ -x "$(command -v pg_dump)" ]; then
 183                 errorecho "ERROR:PostgreSQL not installed (command pg_dump not found)."
 184                 errorecho "ERROR: No backup of database possible!"
 185         else
 186                 PGPASSWORD="${dbPassword}" pg_dump "${nextcloudDatabase}" -h localhost -U "${dbUser}" -f "${backupdir}/${fileNameBackupDb}"
 187         fi
 188
 189         echo "Done"
 190         echo
 191 fi
 192
 193 #
 194 # Start web server
 195 #
 196 echo "Starting web server..."
 197 systemctl start "${webserverServiceName}"
 198 echo "Done"
 199 echo
 200
 201 #
 202 # Disable maintenance mode
 203 #
 204 DisableMaintenanceMode
 205
 206 #
 207 # Delete old backups
 208 #
 209 if [ ${maxNrOfBackups} != 0 ]
 210 then
 211         nrOfBackups=$(ls -l ${backupMainDir} | grep -c ^d)
 212
 213         if [[ ${nrOfBackups} > ${maxNrOfBackups} ]]
 214         then
 215                 echo "Removing old backups..."
 216                 ls -t ${backupMainDir} | tail -$(( nrOfBackups - maxNrOfBackups )) | while read -r dirToRemove; do
 217                         echo "${dirToRemove}"
 218                         rm -r "${backupMainDir}/${dirToRemove:?}"
 219                         echo "Done"
 220                         echo
 221                 done
 222         fi
 223 fi
 224
 225 echo
 226 echo "DONE!"
 227 echo "Backup created: ${backupdir}"