After some experimenting and basic research I found the following seemed to work:

sudo mount -t overlay -o lowerdir=/media/Disk2/backup,upperdir=/media/Disk1/backup,workdir=/media/Disk1/.backup overlay /media/Disk1/backup

The syntax is reasonably evident from the command. The workdir is a directory on the same media as the upperdir, and is where the working files for overlayfs are kept.

Overlayfs is not what I wish to use for my back-up server.

Mergerfs looks more like what I wish to achieve it is a way to pool drive into a common mount point. Below are some links with information and and possible setups.

• Combining Different Sized Drives with mergerfs and SnapRAID
• Mergerfs – another good option to pool your SnapRAID disks
• https://zackreed.me/mergerfs-neat-tricks/
• trapexit / mergerfs
• Disk Pooling in Linux with mergerFS
• The Perfect Media Server - 2019 Edition
• Systemd startup Mergerfs Union Filesystem on Arch Linux
• Ubuntu Manuals mergerfs

Down load the current correct version of mergerfs from: https://github.com/trapexit/mergerfs/releases/, hint look at the link of the file of interest….: wget https://github.com/trapexit/mergerfs/releases/download/2.29.0/mergerfs_2.29.0.ubuntu-xenial_amd64.deb

Then load it into linux: sudo dpkg -i mergerfs_2.29.0.ubuntu-xenial_amd64.deb

Then create a mount point directory, e.g. /srv/storage, sudo mkdir /srv/storage sudo vim /etc/fstab

UUID=d426f5e0-7fbd-4e7f-915e-b7c78eb70877 /                   ext4    errors=remount-ro 0       1
# swap was on /dev/sdd5 during installation
UUID=e3442da3-4eaf-477d-94af-6ace66097a54        none           swap    sw              0       0
UUID=2fedae7e-8214-4fec-a6dd-85d7026d474f       /media/Disk1    ext4    defaults        0       0
UUID=38f52a66-fe96-4eb4-a794-6fe1d02bab4a       /media/Disk2    ext4    defaults        0       0
UUID=1cb1509c-ec09-46cd-ab30-23f3be5b554e       /media/Disk3    ext4    defaults        0       0
UUID=2ba18a1e-d48d-4122-bff8-30c2bc359749       /media/Disk4    ext4    defaults        0       0
/media/Disk1:/media/Disk2 /srv/storage fuse.mergerfs use_ino,defaults,allow_other,minfreespace=50G,fsname=mergerfs 0 0
#/media/Disk1           /export/Disk1   bind    bind    0       0
#/media/Disk2           /export/Disk2   bind    bind    0       0
/media/Disk4            /export/Disk4   bind    bind    0       0
/home/shared            /export/shared  bind    bind    0       0

Directly mount from CLI: sudo mergerfs -o defaults,allow_other,use_ino,fsname=mergerFS /media/Disk1:/media/Disk2 /srv/storage

To unmount: sudo umount /srv/storage

To check mounted disks df -Th

Filesystem     Type           Size  Used Avail Use% Mounted on
udev           devtmpfs        16G     0   16G   0% /dev
tmpfs          tmpfs          3.2G  2.7M  3.2G   1% /run
/dev/sdd1      ext4           443G  161G  260G  39% /
tmpfs          tmpfs           16G     0   16G   0% /dev/shm
tmpfs          tmpfs          5.0M     0  5.0M   0% /run/lock
tmpfs          tmpfs           16G     0   16G   0% /sys/fs/cgroup
mergerfs       fuse.mergerfs   11T  177M   11T   1% /srv/storage
/dev/sdb1      ext4           5.5T   89M  5.2T   1% /media/Disk2
/dev/sda1      ext4           5.5T   89M  5.2T   1% /media/Disk3
/dev/sdc1      ext4           5.5T   89M  5.2T   1% /media/Disk1
/dev/sde1      ext4           9.1T  1.2T  7.5T  14% /media/Disk4
tmpfs          tmpfs          3.2G     0  3.2G   0% /run/user/1000

#!/bin/bash
 
#input 1 is the proposed mount point
 
if [ -z "$1" ]
then 
   exit 11  #no mount point input, exit with error
else
   mount1=$1 #Use mount point input
fi
 
if grep -qs "$mount1" /proc/mounts; then
  exit 0  #Already mounted, exit with success
else
  mount "$mount1"
  if [ $? -eq 0 ]; then
   exit 0  # Successfully mounted, exit with success
  else
   exit 12 # mount failed, exit with error
  fi
fi

#!/bin/bash
#Script to mount NFS remote Disk1 to local /mnt/backup1
 
if grep -qs "/mnt/backup1" /proc/mounts; then
  exit 0  #Already mounted, exit with success
else
  mount -t nfs -o rw,vers=4 192.168.1.5:/export/Disk1 /mnt/backup1
  if [ $? -eq 0 ]; then
   exit 0  # Successfully mounted, exit with success
  else
   exit 12 # mount failed, exit with error
  fi
fi

#!/bin/bash
#Script to mount NFS remote Disk2 to local /mnt/backup2
 
if grep -qs "/mnt/backup2" /proc/mounts; then
  exit 0  #Already mounted, exit with success
else
  mount -t nfs -o rw,vers=4 192.168.1.5:/export/Disk2 /mnt/backup2
  if [ $? -eq 0 ]; then
   exit 0  # Successfully mounted, exit with success
  else
   exit 12 # mount failed, exit with error
  fi
fi

#!/bin/bash
#Script to mount NFS remote Disk2 to local /mnt/backup2
 
if grep -qs "/mnt/backup1" /proc/mounts; then
  umount /mnt/backup1
  if [ $? -eq 0 ]; then
   exit 0  # Successfully unmounted, exit with success
  else
   exit 12 # umount failed, exit with error
  fi
else
  exit 0 # Not actually mounted, exit with success
fi

#!/bin/bash
#Script to mount NFS remote Disk2 to local /mnt/backup2
 
if grep -qs "/mnt/backup2" /proc/mounts; then
  umount /mnt/backup2
  if [ $? -eq 0 ]; then
   exit 0  # Successfully unmounted, exit with success
  else
   exit 12 # umount failed, exit with error
  fi
else
  exit 0 # Not actually mounted, exit with success
fi

I do not use Rsnapshot anymore. I just do not feel comfortable using it.
The following is the command I use to backup my main media drive: sudo rsync -av -u --delete /media/disk2/Media/ baumkp@192.168.1.5::all/media/Disk4/disk2 --exclude=snapraid.* --exclude=.Trash* --exclude=lost* >tmp.txt

I have rsync setup running as a daemon on 192.168.1.5 with login details for baumkp setup on the sever accepting input from the local area network to just the one address 192.168.1.10. On the remote machine 192.168.1.5: sudo vim /etc/rsyncd.conf

# create new
  
# any name you like
[all]
# destination directory to copy
path = /
# hosts you allow to access
hosts allow = 192.168.1.10
#hosts deny = *
list = true
uid = root
gid = root
read only = false
#auth users = baumkp
#secrets file = /etc/rsyncd.secrets

sudo vim /etc/rsyncd.secrets

username:userpassword

Use systemd systemctl from control of the deamon: sudo systemctl status rsync.service [status, start, stop, restart, reload, disable, enable] I have enabled so the rsync deamon this normally running.

The local directory /media/disk2/Media/ contents are to be backed up.

#################################################
# rsnapshot.conf - rsnapshot configuration file #
#################################################
#                                               #
# PLEASE BE AWARE OF THE FOLLOWING RULE:        #
#                                               #
# This file requires tabs between elements      #
#                                               #
#################################################
 
#######################
# CONFIG FILE VERSION #
#######################
 
config_version  1.2
 
###########################
# SNAPSHOT ROOT DIRECTORY #
###########################
 
# All snapshots will be stored under this root directory.
#
# snapshot_root /var/cache/rsnapshot/ #default 
snapshot_root   /mnt/backup1
 
# If no_create_root is enabled, rsnapshot will not automatically create the
# snapshot_root directory. This is particularly useful if you are backing
# up to removable media, such as a FireWire or USB drive.
#
#no_create_root 1
 
#################################
# EXTERNAL PROGRAM DEPENDENCIES #
#################################
 
# LINUX USERS:   Be sure to uncomment "cmd_cp". This gives you extra features.
# EVERYONE ELSE: Leave "cmd_cp" commented out for compatibility.
#
# See the README file or the man page for more details.
#
cmd_cp          /bin/cp
 
# uncomment this to use the rm program instead of the built-in perl routine.
#
cmd_rm          /bin/rm
 
# rsync must be enabled for anything to work. This is the only command that
# must be enabled.
#
cmd_rsync       /usr/bin/rsync
 
# Uncomment this to enable remote ssh backups over rsync.
#
#cmd_ssh        /usr/bin/ssh
 
# Comment this out to disable syslog support.
#
cmd_logger      /usr/bin/logger
 
# Uncomment this to specify the path to "du" for disk usage checks.
# If you have an older version of "du", you may also want to check the
# "du_args" parameter below.
#
cmd_du          /usr/bin/du
 
# Uncomment this to specify the path to rsnapshot-diff.
#
cmd_rsnapshot_diff      /usr/bin/rsnapshot-diff
 
# Specify the path to a script (and any optional arguments) to run right
# before rsnapshot syncs files
#
#cmd_preexec    /path/to/preexec/script
 
# Specify the path to a script (and any optional arguments) to run right
# after rsnapshot syncs files
#
#cmd_postexec   /path/to/postexec/script
 
# Paths to lvcreate, lvremove, mount and umount commands, for use with
# Linux LVMs.
#
#linux_lvm_cmd_lvcreate /sbin/lvcreate
#linux_lvm_cmd_lvremove /sbin/lvremove
#linux_lvm_cmd_mount    /bin/mount
#linux_lvm_cmd_umount   /bin/umount
#########################################
#     BACKUP LEVELS / INTERVALS         #
# Must be unique and in ascending order #
# e.g. alpha, beta, gamma, etc.         #
#########################################
 
#retain alpha   6
#retain beta    7
#retain gamma   4
#retain delta   3
 
#retain hourly  6
retain  daily   7
retain  weekly  4
retain  monthly 3
 
 
############################################
#              GLOBAL OPTIONS              #
# All are optional, with sensible defaults #
############################################
 
# Verbose level, 1 through 5.
# 1     Quiet           Print fatal errors only
# 2     Default         Print errors and warnings only
# 3     Verbose         Show equivalent shell commands being executed
# 4     Extra Verbose   Show extra verbose information
# 5     Debug mode      Everything
#
verbose         2
 
# Same as "verbose" above, but controls the amount of data sent to the
# logfile, if one is being used. The default is 3.
# If you want the rsync output, you have to set it to 4
#
loglevel        3
 
# If you enable this, data will be written to the file you specify. The
# amount of data written is controlled by the "loglevel" parameter.
#
logfile         /var/log/rsnapshot.log
 
# If enabled, rsnapshot will write a lockfile to prevent two instances
# from running simultaneously (and messing up the snapshot_root).
# If you enable this, make sure the lockfile directory is not world
# writable. Otherwise anyone can prevent the program from running.
#
lockfile        /var/run/rsnapshot.pid
 
# By default, rsnapshot check lockfile, check if PID is running
# and if not, consider lockfile as stale, then start
# Enabling this stop rsnapshot if PID in lockfile is not running
#
#stop_on_stale_lockfile         0
 
# Default rsync args. All rsync commands have at least these options set.
#
rsync_short_args        -av
rsync_long_args --delete        --numeric-ids   --relative      --delete-excluded
 
# ssh has no args passed by default, but you can specify some here.
#
#ssh_args       -p 22
 
# Default arguments for the "du" program (for disk space reporting).
# The GNU version of "du" is preferred. See the man page for more details.
# If your version of "du" doesn't support the -h flag, try -k flag instead.
#
du_args         -csh
 
# If this is enabled, rsync won't span filesystem partitions within a
# backup point. This essentially passes the -x option to rsync.
# The default is 0 (off).
#
#one_fs         0
 
# The include and exclude parameters, if enabled, simply get passed directly
# to rsync. If you have multiple include/exclude patterns, put each one on a
# separate line. Please look up the --include and --exclude options in the
# rsync man page for more details on how to specify file name patterns. 
# 
#include        ???
#include        ???
exclude         /lost+found
exclude         snapraid.*
exclude         lost*
exclude         .Trash*
exclude         /proc/*
exclude         /run/*
exclude         /tmp/*
exclude         /VMs/*
 
# The include_file and exclude_file parameters, if enabled, simply get
# passed directly to rsync. Please look up the --include-from and
# --exclude-from options in the rsync man page for more details.
#
#include_file   /path/to/include/file
#exclude_file   /path/to/exclude/file
 
# If your version of rsync supports --link-dest, consider enabling this.
# This is the best way to support special files (FIFOs, etc) cross-platform.
# The default is 0 (off).
#
#link_dest      0
 
# When sync_first is enabled, it changes the default behaviour of rsnapshot.
# Normally, when rsnapshot is called with its lowest interval
# (i.e.: "rsnapshot alpha"), it will sync files AND rotate the lowest
# intervals. With sync_first enabled, "rsnapshot sync" handles the file sync,
# and all interval calls simply rotate files. See the man page for more
# details. The default is 0 (off).
#
#sync_first     0
 
# If enabled, rsnapshot will move the oldest directory for each interval
# to [interval_name].delete, then it will remove the lockfile and delete
# that directory just before it exits. The default is 0 (off).
#
#use_lazy_deletes       0
 
# Number of rsync re-tries. If you experience any network problems or
# network card issues that tend to cause ssh to fail with errors like
# "Corrupted MAC on input", for example, set this to a non-zero value
# to have the rsync operation re-tried.
#
#rsync_numtries 0
 
# LVM parameters. Used to backup with creating lvm snapshot before backup
# and removing it after. This should ensure consistency of data in some special
# cases
#
# LVM snapshot(s) size (lvcreate --size option).
#
#linux_lvm_snapshotsize 100M
 
# Name to be used when creating the LVM logical volume snapshot(s).
#
#linux_lvm_snapshotname rsnapshot
 
# Path to the LVM Volume Groups.
#
#linux_lvm_vgpath       /dev
 
# Mount point to use to temporarily mount the snapshot(s).
#
#linux_lvm_mountpath    /path/to/mount/lvm/snapshot/during/backup
 
###############################
### BACKUP POINTS / SCRIPTS ###
###############################
 
# LOCALHOST
backup  /media/disk1/KarlData   KarlData/
backup  /home/                  home/
#backup /home/          localhost/
#backup /etc/           localhost/
#backup /usr/local/     localhost/
#backup /var/log/rsnapshot              localhost/
#backup /etc/passwd     localhost/
#backup /home/foo/My Documents/         localhost/
#backup /foo/bar/       localhost/      one_fs=1, rsync_short_args=-urltvpog
#backup_script  /usr/local/bin/backup_pgsql.sh  localhost/postgres/
# You must set linux_lvm_* parameters below before using lvm snapshots
#backup lvm://vg0/xen-home/     lvm-vg0/xen-home/
 
# EXAMPLE.COM
#backup_exec    /bin/date "+ backup of example.com started at %c"
#backup root@example.com:/home/ example.com/    +rsync_long_args=--bwlimit=16,exclude=core
#backup root@example.com:/etc/  example.com/    exclude=mtab,exclude=core
#backup_exec    ssh root@example.com "mysqldump -A > /var/db/dump/mysql.sql"
#backup root@example.com:/var/db/dump/  example.com/
#backup_exec    /bin/date "+ backup of example.com ended at %c"
 
# CVS.SOURCEFORGE.NET
#backup_script  /usr/local/bin/backup_rsnapshot_cvsroot.sh      rsnapshot.cvs.sourceforge.net/
 
# RSYNC.SAMBA.ORG
#backup rsync://rsync.samba.org/rsyncftp/       rsync.samba.org/rsyncftp/

config_version  1.2

snapshot_root   /mnt/backup1
cmd_cp          /bin/cp

cmd_rm          /bin/rm

cmd_rsync       /usr/bin/rsync

cmd_logger      /usr/bin/logger

cmd_du          /usr/bin/du

cmd_rsnapshot_diff      /usr/bin/rsnapshot-diff

retain  daily   7
retain  weekly  4
retain  monthly 3

verbose         2

loglevel        3

logfile         /var/log/rsnapshot.log

lockfile        /var/run/rsnapshot.pid

rsync_short_args        -av
rsync_long_args --delete        --numeric-ids   --relative      --delete-excluded

exclude         /lost+found
exclude         snapraid.*
exclude         lost*
exclude         .Trash*
exclude         /proc/*
exclude         /run/*
exclude         /tmp/*
exclude         /VMs/*

backup  /media/disk1/KarlData   KarlData/
backup  /home/                  home/

Remember! !The rsnapshot configuration file separates with tabs not spaces!

#################################################
# rsnapshot.conf - rsnapshot configuration file #
#################################################
#                                               #
# PLEASE BE AWARE OF THE FOLLOWING RULE:        #
#                                               #
# This file requires tabs between elements      #
#                                               #
#################################################
 
#######################
# CONFIG FILE VERSION #
#######################
 
config_version  1.2
 
###########################
# SNAPSHOT ROOT DIRECTORY #
###########################
 
# All snapshots will be stored under this root directory.
#
# snapshot_root /var/cache/rsnapshot/ #default 
snapshot_root   /mnt/backup2
 
# If no_create_root is enabled, rsnapshot will not automatically create the
# snapshot_root directory. This is particularly useful if you are backing
# up to removable media, such as a FireWire or USB drive.
#
#no_create_root 1
 
#################################
# EXTERNAL PROGRAM DEPENDENCIES #
#################################
 
# LINUX USERS:   Be sure to uncomment "cmd_cp". This gives you extra features.
# EVERYONE ELSE: Leave "cmd_cp" commented out for compatibility.
#
# See the README file or the man page for more details.
#
cmd_cp          /bin/cp
 
# uncomment this to use the rm program instead of the built-in perl routine.
#
cmd_rm          /bin/rm
 
# rsync must be enabled for anything to work. This is the only command that
# must be enabled.
#
cmd_rsync       /usr/bin/rsync
 
# Uncomment this to enable remote ssh backups over rsync.
#
#cmd_ssh        /usr/bin/ssh
 
# Comment this out to disable syslog support.
#
cmd_logger      /usr/bin/logger
 
# Uncomment this to specify the path to "du" for disk usage checks.
# If you have an older version of "du", you may also want to check the
# "du_args" parameter below.
#
cmd_du          /usr/bin/du
 
# Uncomment this to specify the path to rsnapshot-diff.
#
cmd_rsnapshot_diff      /usr/bin/rsnapshot-diff
 
# Specify the path to a script (and any optional arguments) to run right
# before rsnapshot syncs files
#
#cmd_preexec    /path/to/preexec/script
 
# Specify the path to a script (and any optional arguments) to run right
# after rsnapshot syncs files
#
#cmd_postexec   /path/to/postexec/script
 
# Paths to lvcreate, lvremove, mount and umount commands, for use with
# Linux LVMs.
#
#linux_lvm_cmd_lvcreate /sbin/lvcreate
#linux_lvm_cmd_lvremove /sbin/lvremove
#linux_lvm_cmd_mount    /bin/mount
#linux_lvm_cmd_umount   /bin/umount
 
#########################################
#     BACKUP LEVELS / INTERVALS         #
# Must be unique and in ascending order #
# e.g. alpha, beta, gamma, etc.         #
#########################################
#retain alpha   6
#retain beta    7
#retain gamma   4
#retain delta   3
 
#retain hourly  6
retain  daily   7
retain  weekly  4
retain  monthly 3
 
 
############################################
#              GLOBAL OPTIONS              #
# All are optional, with sensible defaults #
############################################
 
# Verbose level, 1 through 5.
# 1     Quiet           Print fatal errors only
# 2     Default         Print errors and warnings only
# 3     Verbose         Show equivalent shell commands being executed
# 4     Extra Verbose   Show extra verbose information
# 5     Debug mode      Everything
#
verbose         2
 
# Same as "verbose" above, but controls the amount of data sent to the
# logfile, if one is being used. The default is 3.
# If you want the rsync output, you have to set it to 4
#
loglevel        3
 
# If you enable this, data will be written to the file you specify. The
# amount of data written is controlled by the "loglevel" parameter.
#
logfile         /var/log/rsnapshot.log
 
# If enabled, rsnapshot will write a lockfile to prevent two instances
# from running simultaneously (and messing up the snapshot_root).
# If you enable this, make sure the lockfile directory is not world
# writable. Otherwise anyone can prevent the program from running.
#
lockfile        /var/run/rsnapshot.pid
 
# By default, rsnapshot check lockfile, check if PID is running
# and if not, consider lockfile as stale, then start
# Enabling this stop rsnapshot if PID in lockfile is not running
#
#stop_on_stale_lockfile         0
 
# Default rsync args. All rsync commands have at least these options set.
#
rsync_short_args        -av
rsync_long_args --delete        --numeric-ids   --relative      --delete-excluded
 
# ssh has no args passed by default, but you can specify some here.
#
#ssh_args       -p 22
 
# Default arguments for the "du" program (for disk space reporting).
# The GNU version of "du" is preferred. See the man page for more details.
# If your version of "du" doesn't support the -h flag, try -k flag instead.
#
du_args         -csh
 
# If this is enabled, rsync won't span filesystem partitions within a
# backup point. This essentially passes the -x option to rsync.
# The default is 0 (off).
#
#one_fs         0
 
# The include and exclude parameters, if enabled, simply get passed directly
# to rsync. If you have multiple include/exclude patterns, put each one on a
# separate line. Please look up the --include and --exclude options in the
# rsync man page for more details on how to specify file name patterns. 
# 
#include        ???
#include        ???
exclude         /lost+found
exclude         snapraid.*
exclude         lost*
exclude         .Trash*
exclude         /proc/*
exclude         /run/*
exclude         /tmp/*
exclude         /VMs/*
 
# The include_file and exclude_file parameters, if enabled, simply get
# passed directly to rsync. Please look up the --include-from and
# --exclude-from options in the rsync man page for more details.
#
#include_file   /path/to/include/file
#exclude_file   /path/to/exclude/file
 
# If your version of rsync supports --link-dest, consider enabling this.
# This is the best way to support special files (FIFOs, etc) cross-platform.
# The default is 0 (off).
#
#link_dest      0
 
# When sync_first is enabled, it changes the default behaviour of rsnapshot.
# Normally, when rsnapshot is called with its lowest interval
# (i.e.: "rsnapshot alpha"), it will sync files AND rotate the lowest
# intervals. With sync_first enabled, "rsnapshot sync" handles the file sync,
# and all interval calls simply rotate files. See the man page for more
# details. The default is 0 (off).
#
#sync_first     0
 
# If enabled, rsnapshot will move the oldest directory for each interval
# to [interval_name].delete, then it will remove the lockfile and delete
# that directory just before it exits. The default is 0 (off).
#
#use_lazy_deletes       0
 
# Number of rsync re-tries. If you experience any network problems or
# network card issues that tend to cause ssh to fail with errors like
# "Corrupted MAC on input", for example, set this to a non-zero value
# to have the rsync operation re-tried.
#
#rsync_numtries 0
 
# LVM parameters. Used to backup with creating lvm snapshot before backup
# and removing it after. This should ensure consistency of data in some special
# cases
#
# LVM snapshot(s) size (lvcreate --size option).
#
#linux_lvm_snapshotsize 100M
 
# Name to be used when creating the LVM logical volume snapshot(s).
#
#linux_lvm_snapshotname rsnapshot
 
# Path to the LVM Volume Groups.
#
#linux_lvm_vgpath       /dev
 
# Mount point to use to temporarily mount the snapshot(s).
#
#linux_lvm_mountpath    /path/to/mount/lvm/snapshot/during/backup
 
###############################
### BACKUP POINTS / SCRIPTS ###
###############################
 
# LOCALHOST
backup  /media/disk1/Media      Media/
#backup /home/          localhost/
#backup /home/          localhost/
#backup /etc/           localhost/
#backup /usr/local/     localhost/
#backup /var/log/rsnapshot              localhost/
#backup /etc/passwd     localhost/
#backup /home/foo/My Documents/         localhost/
#backup /foo/bar/       localhost/      one_fs=1, rsync_short_args=-urltvpog
#backup_script  /usr/local/bin/backup_pgsql.sh  localhost/postgres/
# You must set linux_lvm_* parameters below before using lvm snapshots
#backup lvm://vg0/xen-home/     lvm-vg0/xen-home/
 
# EXAMPLE.COM
#backup_exec    /bin/date "+ backup of example.com started at %c"
#backup root@example.com:/home/ example.com/    +rsync_long_args=--bwlimit=16,exclude=core
#backup root@example.com:/etc/  example.com/    exclude=mtab,exclude=core
#backup_exec    ssh root@example.com "mysqldump -A > /var/db/dump/mysql.sql"
#backup root@example.com:/var/db/dump/  example.com/
#backup_exec    /bin/date "+ backup of example.com ended at %c"
 
# CVS.SOURCEFORGE.NET
#backup_script  /usr/local/bin/backup_rsnapshot_cvsroot.sh      rsnapshot.cvs.sourceforge.net/
 
# RSYNC.SAMBA.ORG
#backup rsync://rsync.samba.org/rsyncftp/       rsync.samba.org/rsyncftp/

config_version  1.2

snapshot_root   /mnt/backup2
cmd_cp          /bin/cp

cmd_rm          /bin/rm

cmd_rsync       /usr/bin/rsync

cmd_logger      /usr/bin/logger

cmd_du          /usr/bin/du

cmd_rsnapshot_diff      /usr/bin/rsnapshot-diff

retain  daily   7
retain  weekly  4
retain  monthly 3

verbose         2

loglevel        3

logfile         /var/log/rsnapshot.log

lockfile        /var/run/rsnapshot.pid

rsync_short_args        -av
rsync_long_args --delete        --numeric-ids   --relative      --delete-excluded

exclude         /lost+found
exclude         snapraid.*
exclude         lost*
exclude         .Trash*
exclude         /proc/*
exclude         /run/*
exclude         /tmp/*
exclude         /VMs/*

backup  /media/disk1/Media      Media/

Remember! !The rsnapshot configuration file separates with tabs not spaces!

Do a manual run through first:

1. Start-up Back up Computer sudo bash ./Myscripts/ipmi_start_05_40.sh ; echo $? …:… See IPMI startup script for description of this script.
2. Mount the back-up drives to the back-up server …:… See NFS
   1. Mount the first back-up drive sudo bash ~/Myscripts/mount_backup1.sh ; echo $?
   2. Mount the Second back-up drive sudo bash ~/Myscripts/mount_backup2.sh ; echo $?
3. Perform the various backup
   1. sudo rsnapshot -c /etc/rsnapshot1.conf daily
   2. sudo rsnapshot -c /etc/rsnapshot2.conf daily
   3. sudo rsync -av -u --delete /media/disk2/Media/ baumkp@192.168.5::all/media/Disk4/disk2 --exclude=snapraid.* --exclude=.Trash* --exclude=lost* >tmp.txt
4. Unmount the backup drives on the backup servers
   1. sudo bash ~/Myscripts/unmount_backup1.sh
   2. sudo bash ~/Myscripts/unmount_backup2.sh
5. Turn off the remote back-up sever, see IPMI Stop script
   1. sudo bash ~/Myscripts/ipmi_stop_05_40.sh ; echo $?

To use: sudo bash ~/Myscripts/server_backup.sh [<weekly> | monthly | quarterly]

#!/bin/bash
 
if [ "$1" != "" ]; then
    case "$1" in
        weekly | monthly | quarterly)
               period="$1"
        ;;
        *)
               period="weekly"
        ;;
    esac
else
    period="weekly"
fi
 
strf='/var/log/backup.log'
str0='/home/baumkp'
str1='/Myscripts/'
ipmi_start='ipmi_start_05_40.sh'
ipmi_stop='ipmi_stop_05_40.sh'
# $rtn  is the saved global error code from last command (failed)
# $func1 is the glabal of function name that failed 
# $period is the rsnapshot period to be used: weekly, monthly, or quarterly : default is weekly 
 
function successtype 
{
# This function performs the success response
# $rtn is the inputed return
# $strf is the log file
# function input 1:
  # 0 : return on error with error status
  # 1 : (default & not 0) exit on error with error status
 
if [ "$1" != "" ]; then
    case "$1" in
        0)
               return_type="$1"
        ;;
        *)
               return_type=1
        ;;
    esac
else
    return_type=1
fi
 
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
 
if [ "$rtn" == "0" ]
  then
    echo "Successful"  >>"$strf"
    return "$rtn"
  else
    echo "Unsuccessful" "$rtn"  >>"$strf"
    if [ "$return_type" == "0" ]
      then
        return "$rtn"
      else
        exit "$rtn"
    fi
fi
}
 
#Script to Startup remote IPMI Server
 
echo "--------------------------------------------------"  >>"$strf"
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
echo "Start Backup Server" "$period"   >>"$strf"
 
func1="Remote Backup Server Started"
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
echo "$func1" | awk '{printf "%s  ", $0}'           >>"$strf"
cmd1="${str0}${str1}${ipmi_start}"
bash "$cmd1"
rtn=$?
#rtn=10  # for error on test
successtype
 
#Script to mount remote backup drive
func1="Mount /mntbackup1"
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
echo "$func1" | awk '{printf "%s  ", $0}'           >>"$strf"
 
if grep -qs "/mnt/backup1" /proc/mounts; then
    #Already mounted, log success
    echo "already mounted"   >>"$strf"
  else
    mount -t nfs -o rw,vers=4 192.168.1.5:/export/Disk1 /mnt/backup1
    rtn=$?
    successtype
  fi
 
function run_cmd
{
  # use global $strf for log file
  # use global $cmd1 for bash command to be run
  # use global $str3 for log descriptor string
  # use global $rtn to store function return value
 
  echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
  echo "${str3}" | awk '{printf "%s ", $0}'   >>"$strf"
 
  eval "${cmd1}"
  #echo "$cmd1" | awk '{printf "%s  ", $0}'           >>"$strf" # test script
  rtn=$?
  #rtn=10 # for error on test
  successtype 0
  return "$rtn"
}
 
#Script to run Rsnapshot Karl Data 1a
cmd1="rsync -a -u --delete '/media/disk1/KarlData/Karl Data 1' 'baumkp@192.168.1.5::all/media/Disk1/Karl Data 1/.sync' --exclude=snapraid.* --exclude=.Trash* --exclude=lost*"
str3="rsync /media/disk1/KarlData/Karl Data 1"
run_cmd
cmd1="rsnapshot -c /etc/rsnapshot1a.conf ${period}"
str3="/etc/rsnapshot1a"
#backup  /media/disk1/KarlData/Karl Data 1       KarlData/Karl Data 1
run_cmd
 
 
#Script to run Rsnapshot Karl Data 1b
cmd1="rsync -a -u --delete '/media/disk1/KarlData/Karl Data 2' 'baumkp@192.168.1.5::all/media/Disk1/Karl Data 2/.sync' --exclude=snapraid.* --exclude=.Trash* --exclude=lost*"
str3="rsync /media/disk1/KarlData/Karl Data 2"
run_cmd
cmd1="rsnapshot -c /etc/rsnapshot1b.conf ${period}"
str3="/etc/rsnapshot1b"
#backup  /media/disk1/KarlData/Karl Data 2       KarlData/Karl Data 2
run_cmd
 
#Script to run Rsnapshot Karl Data 1c
cmd1="rsync -a -u --delete '/home/' 'baumkp@192.168.1.5::all/media/Disk1/home/.sync' --exclude=snapraid.* --exclude=.Trash* --exclude=lost*"
str3="rsync /home/"
run_cmd
cmd1="rsnapshot -c /etc/rsnapshot1c.conf ${period}"
str3="/etc/rsnapshot1c"
#backup  /home/      home/
run_cmd
 
#Script to unmount NFS on /mnt/backup1
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
if grep -qs "/mnt/backup1" /proc/mounts; then
  /bin/umount /mnt/backup1
  if [ $? -eq 0 ]; then
    echo "Successfully unmounted /mnt/backup1"     >>"$strf"
  else
    echo "umount /mnt/backup1 failed"     >>"$strf"
  fi
else
  echo "/mnt/backup1 not actually mounted"     >>"$strf"
fi
 
#Script to mount remote backup drive
func1="Mount /mntbackup2"
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
echo "$func1" | awk '{printf "%s  ", $0}'           >>"$strf"
 
if grep -qs "/mnt/backup2" /proc/mounts; then
    #Already mounted, log success
    echo "already mounted"   >>"$strf"
  else
    mount -t nfs -o rw,vers=4 192.168.1.5:/export/Disk2 /mnt/backup2
    rtn=$?
    successtype
  fi
 
#Script to run Rsnapshot Karl Data 2
cmd1="rsync -a -u --delete '/media/disk1/Media' 'baumkp@192.168.1.5::all/media/Disk2/Media/.sync' --exclude=snapraid.* --exclude=.Trash* --exclude=lost*"
str3="rsync /media/disk1/Media"
run_cmd
cmd1="/usr/bin/rsnapshot -c /etc/rsnapshot2.conf ${period}"
str3="rsnapshot2"
#backup  /media/disk1/Media      Media/
run_cmd
 
#Script to unmount NFS on /mnt/backup2
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
if grep -qs "/mnt/backup2" /proc/mounts; then
  /bin/umount /mnt/backup2
  if [ $? -eq 0 ]; then
    echo "Successfully unmounted /mnt/backup2"     >>"$strf"
  else
    echo "umount /mnt/backup2 failed"     >>"$strf"
  fi
else
  echo "/mnt/backup2 not actually mounted"     >>"$strf"
fi
 
#Script to mount remote Storage drive
func1="Mount /mnt/Sorage"
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
echo "$func1" | awk '{printf "%s  ", $0}'           >>"$strf"
 
if grep -qs "/mnt/Storage" /proc/mounts; then
    #Already mounted, log success
    echo "already mounted"   >>"$strf"
  else
    mount -t nfs -o rw,vers=4 192.168.1.5:/export/Disk4 /mnt/storage
    rtn=$?
    successtype
  fi
 
#rsync main media files to backup (rsync daemon is enabled service on backup server)
cmd1="rsync -a -u --delete /media/disk2/Media/ baumkp@192.168.1.5::all/media/Disk4/Media/.sync --exclude=snapraid.* --exclude=.Trash* --exclude=lost*"
str3="rsync /media/disk2/Media/"
run_cmd
cmd1="/usr/bin/rsnapshot -c /etc/rsnapshot4.conf ${period}"
str3="rsnapshot4"
#backup  /media/disk2/Media      Media/
#run_cmd # decided not to history backup this one.
 
#Script to unmount NFS on /mnt/storage
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
if grep -qs "/mnt/storage" /proc/mounts; then
  /bin/umount /mnt/storage
  if [ $? -eq 0 ]; then
     echo "Successfully unmounted /mnt/storage"     >>"$strf"
  else
     echo "umount /mnt/storage failed"     >>"$strf"
  fi
else
  echo "/mnt/storage not actually mounted"     >>"$strf"
fi
 
#Script to shutdown 
 
func1="Remote Backup Server Stop"
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
echo "$func1" | awk '{printf "%s  ", $0}'           >>"$strf"
cmd1="${str0}${str1}${ipmi_stop}"
bash "$cmd1"
rtn=$?
#rtn=10  # for error on test
successtype
 
 
echo $(date +"%Y-%m-%d %H:%M:%S") | awk '{printf "%s  ", $0}'           >>"$strf"
echo "Backup Server Script Ended"   >>"$strf"
 
exit 0