From f85b323f5291b4981751f5cc56fb582b5c7590bf Mon Sep 17 00:00:00 2001
From: Stefan Heinrichsen <github@stefan.heinrichsen.net>
Date: Thu, 20 Apr 2017 12:20:52 +0200
Subject: [PATCH] First Version

---
 do_full_backup.sh | 161 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100755 do_full_backup.sh

diff --git a/do_full_backup.sh b/do_full_backup.sh
new file mode 100755
index 0000000..7a96335
--- /dev/null
+++ b/do_full_backup.sh
@@ -0,0 +1,161 @@
+#!/bin/bash
+
+# ToDos
+#
+# 
+
+SOURCE_FOLDER="/opt/data/backup/backup_folders"
+LTO_DEV="/dev/st0"
+BACKUP_NAME="full_backup"
+TAPE_FOLDER="/opt/data/backup/tape_info"
+TAPE_CHECK="1440"
+TAPE_DELAY="30s"
+MAIL="backup_phex@stefan.heinrichsen.net"
+MAX_TAPE_SIZE="500G"
+
+DATE="$(date +%Y-%m-%d)" 
+TIME="$(date +%H-%M)"
+LOGFILE="$(mktemp -t tar_output_XXX.txt)"
+MESSAGE=""
+TAPE_OLDFILE="$(ls -tC1 ${TAPE_FOLDER} | tail -n 1)"
+
+
+if [ ! -r $SOURCE_FOLDER ]; then
+   MESSAGE="ERROR: Source folder does not exist or is not readable."
+fi
+
+if [ ! -w $LTO_DEV ]; then
+   MESSAGE="ERROR: Output file/device does not exist or is not writeable."
+fi
+
+if [ ! -w $TAPE_FOLDER ]; then
+   MESSAGE="ERROR: Tape info-folder does not exist or is not writeable."
+fi
+
+if [ ! -z "$MESSAGE" ]; then
+   echo $MESSAGE; exit 1
+fi
+
+
+# loop to wait for valid tape (check for 24h (288 time with 5 minutes delay), then give up
+# Format der Serieal ist: C140604093
+
+COUNTER=0
+
+TAPE_SERIAL="$(sg_rmsn -r /dev/st0 2> /dev/null)" 
+EXIT_CODE=$?
+
+while [ $COUNTER -lt $TAPE_CHECK -a $EXIT_CODE -ne 0 ]; do
+   # above check was negativ: send mail, wait and recheck
+
+   echo $TAPE_SERIAL
+   if [ $EXIT_CODE -ne 0 -a $COUNTER -eq 0 ]; then
+      mail -s "Backup - ${BACKUP_NAME} - no tape found" $MAIL <<EOM
+      Hi Admin,
+
+      it seems there is currently no tape insert into the tape drive.
+      Please insert a tape into the drive to store the backup. It should be
+      a new one or the oldest of the backup-set.
+
+      Currently the oldest tape file seems to be:
+      $TAPE_OLDFILE
+
+      Best regards,
+        backup-script
+EOM
+   fi
+   sleep $TAPE_DELAY
+   TAPE_SERIAL="$(sg_rmsn -r /dev/st0 2> /dev/null)" 
+   EXIT_CODE=$?
+
+   let COUNTER=COUNTER+1
+done
+
+echo Tape suche abgeschlossen
+
+# Check if we had a timeout. If so we send a mail an exit
+if [ $COUNTER -eq $TAPE_CHECK ]; then
+   # Timeout!
+
+   mail -s "Backup - ${BACKUP_NAME} - tape-timeout" $MAIL <<EOM
+      Hi Admin,
+
+      even after waiting for the defined timout values: ${TAPE_CHECK} time ${TAPE_DELAY}
+      no tape was inserted. I gave up...
+
+      Best regards,
+        backup-script
+EOM
+   echo timeout
+   exit 1;
+fi
+
+# For development only
+# TAPE_SERIAL="C140604093"
+
+TAPE_FILE="${TAPE_FOLDER}/${TAPE_SERIAL}.log"
+# So we should have a tape serial now, will check existing tape infos now
+
+# First check if it is a new tape; this will be ok to use
+# Else check if it is the oldest tape we used previously; this will be ok as well
+# Else we will abort and send a mail...
+
+if [ "$(ls -A ${TAPE_FILE} 2> /dev/null)" ]; then
+# We found an existing file. Now we check if it is the oldest file in our log-folder.
+
+   if [ $TAPE_OLDFILE != $TAPE_SERIAL.log ]; then
+
+      mail -s "Backup - ${BACKUP_NAME} - invalid tape" $MAIL <<EOM
+         Hi Admin,
+
+         the inserted tape is not a valid one because it was used before and is not the oldest
+         tape in the current backup-set.
+
+         inserted serial   : ${TAPE_SERIAL}
+         oldest used serial: ${TAPE_OLDFILE%.log}
+
+         Please remove the old serial logfile or use another tape.
+
+         Best regards,
+           backup-script
+EOM
+      exit 1
+   fi
+fi
+
+touch $TAPE_FILE
+
+# rewind this tape (just to be sure)
+MESSAGE="$(mt -f /dev/nst0 rewind)"
+
+# do the backup
+# Something wrong here... MESSAGE="$(tar -c -f - ${SOURCE_FOLDER} &> ${LOGFILE} | mbuffer -q -L -s 256k -m 1G -P 95 -o ${LTO_DEV})"
+MESSAGE="$(tar -c -f - ${SOURCE_FOLDER} | mbuffer -q -L -s 256k -m 1G -P 95 -o ${LTO_DEV})"
+#echo       "tar -c -f - ${SOURCE_FOLDER} | mbuffer -L -s 256k -m 1G -P 95 -o ${LTO_DEV}"
+
+ERROR_CODE=$?
+
+if [ $ERROR_CODE -ne 0 ]; then
+   mail -s "Backup -${BACKUP_NAME}- exited with error(s)" -a $LOGFILE $MAIL <<EOM
+   Hi Admin,
+   the backup for $SOURCE_FOLDER exited with error code $ERROR_CODE. Please check on addtional actions. Detailed output:
+
+   $MESSAGE
+
+   Best regards,
+     your backup-script
+EOM
+
+else
+   mail -s "Backup -${BACKUP_NAME}- was successful" -a $LOGFILE $MAIL <<EOM
+   Hi Admin,
+   the backup for $SOURCE_FOLDER went fine. Details at the of the mail.
+   Please make sure to savely store the tape.
+
+   Best regards, 
+     your backup-script
+
+   ---------
+   $MESSAGE
+EOM
+fi