Keepalived

keepalived.conf

global_defs {
  enable_script_security
  script_user root
}

vrrp_instance VI_1 {
    state MASTER
    interface eno1
    virtual_router_id 42
    priority 64
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass sxdsC66K
    }
    virtual_ipaddress {
        10.10.10.10/24
    }    
    notify /opt/slg/broadcastsuite/samples/keepalived_notify.sh
}

On the secondary server, the priority value must be lower than the primary server's value. The higher the value, the higher the priority.

keepalived_notify.sh

#!/bin/bash

ENDSTATE=$3
NAME=$2
TYPE=$1

NODESTATE=2

case $ENDSTATE in
    "BACKUP")   # Transition to BACKUP state
                echo "Setting Broadcast Suite role to SECONDARY"
                NODESTATE=2
                ;;
    "FAULT")    # Transition to FAULT state
                echo "Setting Broadcast Suite role to SECONDARY"
                NODESTATE=2
                ;;
    "MASTER")   # Transition to MASTER state
                echo "Setting Broadcast Suite role to PRIMARY"
                NODESTATE=1
                ;;
    *)          echo "Unknown state ${ENDSTATE} for VRRP ${TYPE} ${NAME}"
                exit 1
                ;;
esac

curl -X POST -H "Content-Type: application/json" \
    -d '{}' \
    http://127.0.0.1:8085/api/v1/system/NodeState?NodeState=$NODESTATE

exit 0;

SELinux

If your server has SELinux enabled, the script execution must be permitted with the following command: chcon -t keepalived_unconfined_script_exec_t /opt/slg/broadcastsuite/samples/keepalived_notify.sh