RMAN Script to Take Full Database Backup Plus Archivelog

#!/bin/bash
 
# Define backup base path
BACKUP_BASE_PATH="/home/oracle/backup" # Replace this with your path

# Provided Oracle SID
export ORACLE_SID=oradb # Replace this with your database SID

# Determine the backup path for this specific Oracle SID
BACKUP_PATH="${BACKUP_BASE_PATH}/${ORACLE_SID}"

# Create the backup directory if it doesn't exist
if [ ! -d "$BACKUP_PATH" ]; then
    mkdir -p "$BACKUP_PATH"
    if [ $? -ne 0 ]; then
        echo "Failed to create backup directory: $BACKUP_PATH"
        exit 1
    fi
fi

# Automatically determine ORACLE_HOME based on ORACLE_SID from /etc/oratab
# Assumes the oratab entry is in the format: <sid>:<oracle_home>:<start_options>
export ORACLE_HOME=$(grep "^$ORACLE_SID:" /etc/oratab | cut -d: -f2)
 
if [ -z "$ORACLE_HOME" ]; then
    echo "ORACLE_HOME could not be determined from /etc/oratab"
    exit 1
fi
 
export PATH=$ORACLE_HOME/bin:$PATH
 
# Define timestamp
TIMESTAMP=$(date +%Y%m%d_%H%M%S) # Generates a timestamp in 'YYYYMMDD_HHMMSS' format
 
# Define tags based on ORACLE_SID
DATABASE_TAG="${ORACLE_SID}_DB"
CONTROLFILE_TAG="${ORACLE_SID}_CTL"
SPFILE_TAG="${ORACLE_SID}_SPFILE"
ARCHIVELOG_TAG="${ORACLE_SID}_ARC"

# Define the RMAN script file
RMAN_SCRIPT="${BACKUP_BASE_PATH}/rman_backup_${TIMESTAMP}.rcv"

# Define the log file
LOG_FILE="${BACKUP_BASE_PATH}/rman_backup_${TIMESTAMP}.log"

# Create the RMAN script file
cat <<EOF > ${RMAN_SCRIPT}
RUN {
    BACKUP AS COMPRESSED BACKUPSET
    DATABASE TAG '${DATABASE_TAG}' FORMAT '${BACKUP_PATH}/${ORACLE_SID}_DB_${TIMESTAMP}_%U.bkp'
    CURRENT CONTROLFILE TAG '${CONTROLFILE_TAG}' FORMAT '${BACKUP_PATH}/${ORACLE_SID}_CTL_${TIMESTAMP}_%U.bkp'
    SPFILE TAG '${SPFILE_TAG}' FORMAT '${BACKUP_PATH}/${ORACLE_SID}_SPFILE_${TIMESTAMP}_%U.bkp'
    PLUS ARCHIVELOG TAG '${ARCHIVELOG_TAG}' FORMAT '${BACKUP_PATH}/${ORACLE_SID}_ARC_${TIMESTAMP}_%U.bkp';
}
EOF

# Execute the RMAN script with nohup and tee to capture output in a log file
nohup rman target / @${RMAN_SCRIPT} | tee ${LOG_FILE} &

SQL "ALTER DATABASE BACKUP CONTROLFILE TO TRACE AS ''${BACKUP_PATH}/controlfile_${TIMESTAMP}.trc'' ";
SQL "CREATE PFILE=''${BACKUP_PATH}/init${ORACLE_SID}_${TIMESTAMP}.ora'' FROM SPFILE";