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This guide outlines the implementation of a highly available MySQL dual-master replication cluster protected by Keepalived for automatic VIP failover. The setup ensures continuous database service despite node failures. Prerequisites Two Linux servers: 192.168.199.49 (Node A) and 192.168.199.50 (Node B) Shared virtual IP (VIP): 192.168.199.52 ...

Starting the Service and Enabling Auto-Start On lb01: [root@lb01 nginx]# systemctl start keepalived.service [root@lb01 nginx]# systemctl enable keepalived.service On lb02: [root@lb02 ~]# systemctl start keepalived.service [root@lb02 ~]# systemctl enable keepalived.service Packet Capture Analysis with Wireshark Once the service is running, cap ...

Keepalived Fundamentals Keepalived is an open-source software solution designed to monitor server health and manage failover scenarios. When a web node encounters downtime or errors, Keepalived automatically removes the affected node from the cluster and redistributes traffic to healthy servers. Once repairs are completed, the original node rej ...

This article outlines a functional, multi-tier network architecture simulating a small-to-medium business (SMB) environment with geographically distributed sites. The design emphasizes redundancy, segmentation, dynamic routing, and perimeter security—implemented using Cisco IOS and ASA 5506-X firewall semantics. Architecture Overview The tooplo ...

Virtual IP Configuration virtual_ipaddress { 10.0.0.3/24 dev eth0 label eth0:1 } track_script { health_check } Failover Testing [root@lb01 ~]# systemctl is-active nginx active [root@lb01 ~]# ip a | grep 0.3 inet 10.0.0.3/24 scope global secondary eth0:1 [root@lb01 ~]# systemctl stop nginx [root@lb01 ~]# ip a | grep 0.3 # VIP migrated after ...