Veeam Backup & Replication - Re-IP Rule on Linux VM - Example 3

VeeamBR_IPRule_Linux.sh

#!/bin/bash
# The script will be worked on RHEL/Fedora/CentOS.
# Set logging options
# Variables.
primary_ip_check="192.168.1.254"
replica_ip_check="192.168.2.254"
primary_net="192.168.1"
replica_net="192.168.2"
keep_alive_file="/etc/keepalived/keepalived.conf"
hosts_file="/etc/hosts"
fstab_file="/etc/fstab"
exports_file="/etc/exports"
# Logging function
readonly SCRIPT_NAME=$(basename $0)
log() {
  echo "$(date) $@"
# logger -p user.error -t $SCRIPT_NAME "$@"
  logger -s "$(date) $@" 2>> /var/log/dr.log
}
err() {
  echo "$(date) $@" >&2
# logger -p user.error -t $SCRIPT_NAME "$@"
  logger -s "$(date) $@" 2>> /var/log/dr.log
}
# First Step: Checking defined IP from primary site by sending ICMP requests to the IP.
# Ping the primary default gateway.
log "Start to send ICMP requests to $primary_ip_check."
ping -c 1 -t 1 $primary_ip_check > /dev/null
if [ $? -eq 0 ]; then
               # Ping successful, no change is needed.
               log "$primary_ip_check is reachable in primary site and no disaster has been occurred. So no change will be applied on configurations."
               exit 0
# Ping unsuccessful and IP address should change to DR site IP range.
else
               # Changing address to DR site IP range and change default gateway as well.
               log "$primary_ip_check is not reachable, script is going to changing IP address and anyother configuration by using replica site IP addresses."
               #Collecting all network script files
               log "Collecting network script files."
               ifcfg_files=($(ls /etc/sysconfig/network-scripts/ifcfg-*))
               for ((i=0; i<${#ifcfg_files[@]}; i++)); do
                              #change IP range according to each array elements
                              log "Changing IP range to $replica_net on ${ifcfg_files[i]} ."
                              sed -i "s@$primary_net@$replica_net@" ${ifcfg_files[i]}
               done
               log "Apply the new configuration on ethernet devices."
               OS_ver=$(lsb_release -a | grep Release | awk '{print $2}'| cut -d '.' -f1)
               if [ $OS_ver -eq 6 ]; then
                              service network restart
               fi
               if [ $OS_ver -eq 7 ]; then
                              systemctl restart network.service
               fi
fi
# Ping the replica gateway (DR Site) to make sure about network connectivity.
log "Testing new IP configurations in DR site by sending ICMP requests to $replica_ip_check"
ping -c 1 -t 1 $replica_ip_check > /dev/null
if [ $? -eq 0 ]; then
               # Ping successful and disaster recovery has been performed successfully.
               log "$replica_ip_check is reachable and there is no problem. This is replica virtual machine."
               #Change IP range to $replica_net in /etc/fstab, /etc/keepalived/keepalived.conf, /etc/exports, /etc/hosts
               if [ -f "$keep_alive_file" ]
               then
                              log "IP range has been change to $replica_net in $keep_alive_file ."
                              sed -i "s@$primary_net@$replica_net@" $keep_alive_file
               else
                              log "$keep_alive_file was not found."
                              echo "$keep_alive_file was not found."
               fi
               if [ -f "$exports_file" ]
               then
                              log "IP range has been changed to $replica_net in $exports_file ."
                              sed -i "s@$primary_net@$replica_net@" $exports_file
               else
                              log "$exports_file was not found, seems NFS service has not configured."
                              echo "$exports_file was not found."
               fi
               sed -i "s@$primary_net@$replica_net@" $fstab_file
               log "IP range has been changed to $replica_net in $fstab_file (If there was any IP with the specified IP range) ."
               sed -i "s/1.237/2.201/g" $hosts_file
               sed -i "s/1.238/2.202/g" $hosts_file
               sed -i "s/1.239/2.203/g" $hosts_file
               sed -i "s@$primary_net@$replica_net@" $hosts_file
               log "IP range has been changed to $replica_net in $hosts_file ."
               exit 0
else
               # Ping unsuccessful, so there is wrong DR detection and IP configuration should revert to primary site IP range.
               log "Primary and replica addresses are not reachable, so there is something wrong!!!"
               log "Script is going to configure primary site configuration on machine."
               #Collecting all network script files
               log "Collecting network script files."
               ifcfg_files=($(ls /etc/sysconfig/network-scripts/ifcfg-*))
               for ((i=0; i<${#ifcfg_files[@]}; i++)); do
                              #change IP range according to each array elements
                              log "Changing IP range to $primary_net on ${ifcfg_files[i]} ."
                              sed -i "s@$replica_net@$primary_net@" ${ifcfg_files[i]}
               done
               #Change IP range to $primary_net in /etc/fstab, /etc/keepalived/keepalived.conf, /etc/exports, /etc/hosts
               if [ -f "$keep_alive_file" ]
               then
                              log "IP range has been change to $primary_net in $keep_alive_file ."
                              sed -i "s@$replica_net@$primary_net@" $keep_alive_file
               else
                              log "$keep_alive_file was not found."
                              echo "$keep_alive_file was not found."
               fi
               if [ -f "$exports_file" ]
               then
                              log "IP range has been changed to $primary_net in $exports_file ."
                              sed -i "s@$replica_net@$primary_net@" $exports_file
               else
                              log "$exports_file was not found, seems NFS service has not configured."
                              echo "$exports_file was not found."
               fi
               sed -i "s@$replica_net@$primary_net@" $fstab_file
               log "IP range has been changed to $primary_net in $fstab_file (If there was any IP with the specified IP range) ."
               sed -i "s/2.201/1.237/g" $hosts_file
               sed -i "s/2.202/1.238/g" $hosts_file
               sed -i "s/2.203/1.239/g" $hosts_file
               sed -i "s@$replica_net@$primary_net@" $hosts_file
               log "IP range has been changed to $primary_net in $hosts_file ."
               log "Apply the new configuration on ethernet devices."
               OS_ver=$(lsb_release -a | grep Release | awk '{print $2}'| cut -d '.' -f1)
               if [ $OS_ver -eq 6 ]; then
                              service network restart
               fi
               if [ $OS_ver -eq 7 ]; then
                              systemctl restart network.service
               fi
fi