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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 ...

Redis Replication Fundamentals Redis replication enables automatic data synchronization from a primary node (master) to replica nodes (slaves). The master handles write operations while replicas serve read requests. Replicatino Mechanism Replicas initiate synchronization by sending a SYNC command to the master The master starts a background sa ...

Introduction to Distributed Storage In the era of big data, traditional file systems limited by physical hardware boundaries oftan fail to meet growing capacity and throughput requirements. Distributed File Systems (DFS) address these challenges by aggregating resources from multiple physical servers into a unified network-accessible storage po ...

Infrastructure Architecture Operating System Kernel IP Address Hostname Role Ubuntu 22.04 LTS 5.15.0 10.0.50.11 control-plane-1 Control Plane Ubuntu 22.04 LTS 5.15.0 10.0.50.12 control-plane-2 Control Plane Ubuntu 22.04 LTS 5.15.0 10.0.50.13 control-plane-3 Control Plane Ubuntu 22.04 LTS 5.15.0 10.0.50.21 worker-1 Worker Ubuntu 2 ...

To establish a RabbitMQ mirror cluster, it is essential to first configure a standard RabbitMQ cluster. In a standard cluster setup, metadata such as exchanges, bindings, and queues are replicated across all nodes in the cluster. However, the actual contents of a queue reside only on its designated node. Clients can connect to any node in the c ...

Practical Example: Highly Available Apache Web Service with Heartbeat 1. Lab Environment Two RHEL/CentOS hosts: node-a – 192.168.1.130 node-b – 192.168.1.129 A floating virtual IP (VIP) 192.168.1.131/24 will be managed by Heartbeat and bound to whichever node is active. 2. Install Apache on Both Nodes sudo yum install -y httpd 3. Prepare the ...

Redis offers three main clustering solutions: Redis Cluster, master/slave replication, and Sentinel mode for automatic failover and fault recovery. Sentinel Mode Overview Sentinel mode builds upon the master/slave replication model by introducing monitoring agents that automatically handle failures. Traditional master/slave setups require manua ...

ZooKeeper is an open-source distributed coordination service designed for high availability, performance, and consistency in distributed applications. It provides a fundamental service: distributed locking. Distributed applications can build more advanced services on top of it, such as synchronization services, configuration maintenance, cluste ...

Cluster Architecture and Prerequisites To establish a robust High Availability (HA) environment using Heartbeat, a two-node architecture is configured on CentOS 6.8 (x86_64). The setup requires distinct network interfaces for management traffic and heartbeat signals to ensure reliable failover mechanisms. Primary Node (ha-node-primary): Menag ...