Tag Archives: HA
Balancing Traffic Across Data Centres Using LVS
The LVS (Linux Virtual Server) project was launched in 1998 and is meant to eliminate Single Point of Failures (SPOF). According to the linuxvirtualserver.org website: “LVS is a highly scalable and available server built on a cluster of real servers, … Continue reading
Building A Highly Available Nginx Reverse-Proxy Using Heartbeat
A cluster in computing is a term used to describe a group of closely linked computers often appearing as a single entity to the outside world. There are various types of clusters—high-availability (HA) clusters, load-balancing clusters, compute clusters or high … Continue reading
Posted in FLOSS, Published Articles
Tagged Cluster, HA, Heartbeat, nginx, Reverse-Proxy
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Building A Highly-Available Web Server Cluster
nginx (pronounced as ‘engine x’) is a powerful HTTP Web server/reverse proxy and IMAP/POP3 reverse proxy. According to a survey conducted in December 2008 by Netcraft, nginx has grown significantly and has surpassed lighttpd (also known as Lighty). Because of … Continue reading
Posted in FLOSS, Published Articles
Tagged Cluster, HA, Load Balancing, nginx, Reverse-Proxy
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Using SNAT for Highly Available Services
Problem Often network based services are restricted to a particular source IP address. A common example is SNMP. A good system/network administrator will restrict access to the SNMP daemon from a particular host, usually a central management server. Sometimes these … Continue reading
Highly Available Apache with mod_jk load balanced Tomcat
This how-to describes the procedure for setting up a highly available setup in which a pair of apache servers are load balancing a pair of tomcat servers. I have tested this configuration with Red Hat Enterprise 4, Fedora Core 5, … Continue reading