Tutorial Configuration FAILOVER centOS 7
Hi,today i will show you how to configuration failover in webserver.
i am using centos 7 minimal for my server,and also vmware workstation 12 for virtualization.
If you don’t know about failover,this is description from wikipedia about failover.
In computing, failover is switching to a redundant or standby computer server, system, hardware component or network upon the failure or abnormal termination of the previously active application,[1] server, system, hardware component, or network. Failover and switchover are essentially the same operation, except that failover is automatic and usually operates without warning, while switchover requires human intervention.
Systems designers usually provide failover capability in servers, systems or networks requiring continuous availability – the used term is high availability – and a high degree of reliability.
At the server level, failover automation usually uses a “heartbeat” system which connects two servers, either through using a separate cable (for example, RS-232 serial ports/cable) or a network connection. As long as a regular “pulse” or “heartbeat” continues between the main server and the second server, the second server will not bring its systems online. There may also be a third “spare parts” server that has running spare components for “hot” switching to prevent downtime. The second server takes over the work of the first as soon as it detects an alteration in the “heartbeat” of the first machine. Some systems have the ability to send a notification of failover.
centos 7
