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#!/bin/sh
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#This script is used to move the data of a postgresql 8.4 instance to the
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#new installed postgresql 9.3 instance after the os was upgraded from ubuntu 10.04 to 14.04.
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#Basically it will decompress a metacat backup file which contains a dumped-all file and
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#resotre it in a postgresql 9.3 instance.
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#You need to pass the metacat backup file to this script. We assume the backup file
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#locating at /var/metacat/metacat-backup directory.
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#This script should be run as the root user.
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#Usage: nohup ./restore-dumped-data-to-pg9.3.sh metacat_backup_file_name &
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#Check the argument of the script. It only can have one - the metacat backup file name.
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METACAT_BACKUP_DIR=/var/metacat/metacat-backup
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SQL_FILE=metacat-postgres-backup.gz
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METACAT_BACKUP_FILE_SUFFIX=.tgz
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DB_BASE=/var/lib/postgresql
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OLD_DB_VERSION=8.4
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ANOTHER_OLD_DB_VERSION=9.1
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NEW_DB_VERSION=9.3
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NEW_DB_CONFIG=/etc/postgresql/$NEW_DB_VERSION/main/postgresql.conf
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OLD_DB_CONFIG=/etc/postgresql/$OLD_DB_VERSION/main/postgresql.conf
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OLD_DB_DATA_DIR=$DB_BASE/$OLD_DB_VERSION
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OLD_DB_BACKUP_FILE=postgresql-$OLD_DB_VERSION.tar.gz
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POSTGRES_USER=postgres
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PORT=5432
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PORT1=5435
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echo "start to move database from $OLD_DB_VERSION to $NEW_DB_VERSION at"
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echo `date`
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echo "the length of argument is $#"
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#echo $@
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if [ $# -ne 1 ]; then
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echo "This script should take one and only one parameter as the metacat backup file name.";
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exit 1;
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fi
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METACAT_BACKUP_FILE_NAME=$1
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echo "the backup file name is $METACAT_BACKUP_FILE_NAME"
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if [ -f $METACAT_BACKUP_DIR/$METACAT_BACKUP_FILE_NAME ]; then
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echo "the metacat backup file $METACAT_BACKUP_DIR/$METACAT_BACKUP_FILE_NAME exists.";
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else
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echo "the metacat backup file $METACAT_BACKUP_DIR/$METACAT_BACKUP_FILE_NAME doesn't exist, please double check the name.";
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exit 1;
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fi
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echo "stop apache"
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/etc/init.d/apache2 stop
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echo "stop tomcat"
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/etc/init.d/tomcat6 stop
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echo "stop postgresql"
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/etc/init.d/postgresql stop
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DECOMPRESS_DIR_NAME=${METACAT_BACKUP_FILE_NAME%%.*}
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echo "the decmporessed dir is $DECOMPRESS_DIR_NAME"
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if [ -f "$DB_BASE/$OLD_DB_BACKUP_FILE" ]; then
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echo "$DB_BASE/$OLD_DB_BACKUP_FILE does exist and we don't need to backup it again"
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else
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echo "back up the old db data at $OLD_DB_DATA_DIR"
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su - $POSTGRES_USER -c "tar -zcvf $DB_BASE/$OLD_DB_BACKUP_FILE $OLD_DB_DATA_DIR"
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#echo "delete the data directory - $OLD_DB_DATA_DIR"
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#rm -rf $OLD_DB_DATA_DIR/main/*
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fi
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#echo "remove postgresql 8.4 and 9.1"
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#apt-get -y remove postgresql-$OLD_DB_VERSION
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#apt-get -y remove postgresql-$ANOTHER_OLD_DB_VERSION
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echo "modify the port to 5435 in the old new db configuraiton file"
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sed -i.bak --regexp-extended "s/(port =).*/\1${PORT1}/;" $OLD_DB_CONFIG
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echo "modify the port to 5432 in the new db configuration file"
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sed -i.bak --regexp-extended "s/(port =).*/\1${PORT}/;" $NEW_DB_CONFIG
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if [ -d "$METACAT_BACKUP_DIR/$DECOMPRESS_DIR_NAME" ]; then
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echo "$METACAT_BACKUP_DIR/$DECOMPRESS_DIR_NAME does exist and we don't need to decompress the metacat backup file again"
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else
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echo "decompress the metacat backup file"
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tar zxvf $METACAT_BACKUP_DIR/$METACAT_BACKUP_FILE_NAME -C $METACAT_BACKUP_DIR
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fi
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echo "restart postgresql"
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/etc/init.d/postgresql start
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echo "change the groupship of $METACAT_BACKUP_DIR"
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chown -R :$POSTGRES_USER $METACAT_BACKUP_DIR
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echo "restore database"
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su - $POSTGRES_USER -c "gunzip -c $METACAT_BACKUP_DIR/$DECOMPRESS_DIR_NAME/$SQL_FILE | psql postgres"
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echo "end to move database from $OLD_DB_VERSION to $NEW_DB_VERSION at"
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echo `date`
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echo "start to vacuum the db at"
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echo `date` >> /tmp/vacuumdb.out
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su - postgres -c "/usr/lib/postgresql/$NEW_DB_VERSION/bin/vacuumdb --all"
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echo "end to vacuum the db at "
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echo `date`
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exit 0
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