Bash script for backup Postgresql cluster

gistfile1.sh

#!/usr/bin/env bash

PG_USER="postgres"

TIMESTAMP=$(date +%Y_%m_%d)
WORKING_DIR="/home/usgene/db_backup"
BACKUP_NAME="${TIMESTAMP}_pg_basebackup"
ARCHIVE_NAME="$BACKUP_NAME.tar.gz"
SPLIT_NAME_PREFIX="${ARCHIVE_NAME}_"
SPLIT_SIZE="10G"

log() {
    echo "[$(date)] $1"
}

exit_unless_success() {
    exit_code=$?
    if [ $exit_code -ne 0 ]; then
        exit $exit_code
    fi
}

if [ ! -d "$WORKING_DIR" ]; then
    mkdir -p "$WORKING_DIR"
    exit_unless_success
fi

cd $WORKING_DIR

log "Creating basebackup..."
pg_basebackup -U $PG_USER --pgdata=$BACKUP_NAME --xlog-method=stream
exit_unless_success

log "Compressing backup..."
tar -czf $ARCHIVE_NAME $BACKUP_NAME
exit_unless_success

log "Splitting archive by parts of $SPLIT_SIZE..."
split -b $SPLIT_SIZE $ARCHIVE_NAME $SPLIT_NAME_PREFIX
exit_unless_success

log "Removing uncompressed basebackup..."
rm -rf $BACKUP_NAME
exit_unless_success