Master PBX High Availability in 2023 with VitalPBX: Unlock Uninterrupted Communication

				
					#!/bin/bash
# This code is the property of VitalPBX LLC Company
# License: Proprietary
# Date: 1-Agu-2023
# Change the status of the servers, the Master goes to Stanby and the Standby goes to Master.
#funtion for draw a progress bar
#You must pass as argument the amount of secconds that the progress bar will run
#progress-bar 10 --> it will generate a progress bar that will run per 10 seconds
set -e
progress-bar() {
        local duration=${1}
        already_done() { for ((done=0; done<$elapsed; done++)); do printf ">"; done }
        remaining() { for ((remain=$elapsed; remain<$duration; remain++)); do printf " "; done }
        percentage() { printf "| %s%%" $(( (($elapsed)*100)/($duration)*100/100 )); }
        clean_line() { printf "\r"; }
        for (( elapsed=1; elapsed<=$duration; elapsed++ )); do
                already_done; remaining; percentage
                sleep 1
                clean_line
        done
        clean_line
}
server_a=`pcs status | awk 'NR==11 {print $4}'`
server_b=`pcs status | awk 'NR==11 {print $5}'`
server_master=`pcs status resources | awk 'NR==1 {print $5}'`
#Perform some validations
if [ "${server_a}" = "" ] || [ "${server_b}" = "" ]
then
    echo -e "\e[41m There are problems with high availability, please check with the command *pcs status* (we recommend applying the command *pcs cluster unstandby* in both servers) \e[0m"
    exit;
fi
if [[ "${server_master}" = "${server_a}" ]]; then
        host_master=$server_a
        host_standby=$server_b
else
        host_master=$server_b
        host_standby=$server_a
fi
arg=$1
if [ "$arg" = 'yes' ] ;then
        perform_bascul='yes'
fi
# Print a warning message and ask to the user if he wants to continue
echo -e "************************************************************"
echo -e "*     Change the roles of servers in high availability     *"
echo -e "*\e[41m WARNING-WARNING-WARNING-WARNING-WARNING-WARNING-WARNING  \e[0m*"
echo -e "*All calls in progress will be lost and the system will be *"
echo -e "*     be in an unavailable state for a few seconds.        *"
echo -e "************************************************************"
#Perform a loop until the users confirm if wants to proceed or not
while [[ $perform_bascul != yes && $perform_bascul != no ]]; do
        read -p "Are you sure to switch from $host_master to $host_standby? (yes,no) > " perform_bascul
done
if [[ "${perform_bascul}" = "yes" ]]; then
        #Unstandby both nodes
        pcs node unstandby $host_master
        pcs node unstandby $host_standby
        #Do a loop per resource
        pcs status resources | awk '{print $2}' | while read -r resource ; do
                #Skip moving the ClusterIP resource, it will be moved at the end
                if [[ "${resource}" != "ClusterIP" ]] && [[ "${resource}" != "Clone" ]] && [[ "${resource}" != "Masters:" ]] && [[ "${resource}" != "Slaves:" ]]; then
                        echo "Moving ${resource} from ${host_master} to ${host_standby}"
                        pcs resource move ${resource} ${host_standby}
                fi
        done
        sleep 5 && pcs node standby $host_master & #Standby current Master node after five seconds
        sleep 20 && pcs node unstandby $host_master & #Automatically Unstandby current Master node after$
        #Move the ClusterIP resource to standby node
        echo "Moving ClusterIP from ${host_master} to ${host_standby}"
        pcs resource move ClusterIP ${host_standby}
        #End the script
        echo "Becoming ${host_standby} to Master"
        progress-bar 10
        echo "Done"
else
        echo "Nothing to do, bye, bye"
fi
sleep 15
role