High Availability

The author selected the Open Source Initiative to receive a donation as part of the Write for DOnations program. Introduction> Introduction # Zabbix is open-source monitoring software for networks and applications.

Introduction> Introduction # This tutorial will demonstrate how you can use Corosync and Pacemaker with a Reserved IP to create a high availability (HA) server infrastructure on DigitalOcean. Corosync is an open source program that provides cluster membership and messaging capabilities, often referred to as the messaging layer, to client servers.

Introduction> Introduction # High availability is a function of system design that allows an application to automatically restart or reroute work to another capable system in the event of a failure.

Introduction> Introduction # High availability is a function of system design that allows an application to automatically restart or reroute work to another capable system in the event of a failure.

Introduction> Introduction # Heartbeat is an open source program that provides cluster infrastructure capabilities—cluster membership and messaging—to client servers, which is a critical component in a high availability (HA) server infrastructure.

Introduction> Introduction # Zabbix is open-source monitoring software for networks and applications. It offers real-time monitoring of thousands of metrics collected from servers, virtual machines, and any other kind of network device.

Introduction> Introduction # Once your application is up and running in a cloud server environment, you may be wondering how you can improve your server environment to make the leap from “it works” to a full-fledged production environment.

Introduction> Introduction # With an increased demand for reliable and performant infrastructures designed to serve critical systems, the terms scalability and high availability couldn’t be more popular. While handling increased system load is a common concern, decreasing downtime and eliminating single points of failure are just as important.

Introduction> Introduction # Any application or website that sees significant growth will eventually need to scale in order to accommodate increases in traffic. For data-driven applications and websites, it’s critical that scaling is done in a way that ensures the security and integrity of their data.

Introduction> Introduction # Albeit one of the more controversial techniques, a good method to geographically distribute your application by taking advantage of your provider’s global presence is to use and manage DNS responses (i.