Hi Ariz, I agree that simple failover configurations are "so yesterday". Having said that, they seem to remain the lowest-hanging-fruit solution for those needing to eliminate a single point of failure without the time and budget to extend this to a proper load-balanced configuration. What are your suggestions for a simple drop-in solution? By this I would mean something that eliminates the SPOF whilst being possible within the following constraints:
- Supported by standard kernels of RHEL/CentOS and Debian/Ubuntu - Implemented using a pair of devices - No need to rewrite applications (the DRBD + HA can be extended to non-web applications) Kind regards, Jijo -- Federico Sevilla III, CISM, CISSP, PMP, MACS CP Chief Executive Officer F S 3 Consulting Inc. http://www.fs3.ph On 02/03/13 02:30, Holden Hao wrote: >> Implementing a Failover cluster to run a redundant website infra >> sounds lazy to me. You should consider implementing a Load-Balanced >> Cluster instead. Start by looking into the following tools: >> - Load Balancer: BigIP or simply use Apache HTTPD's mod_proxy_balancer[2] >> - Replication of Web Applications: use a deployment tool[3][4] since >> you don't really need to replicate the applications in real time >> - Replication of Content Uploads: GlusterFS[5], etc. >> - Replication of MySQL: MySQL Replication or Cluster[6] >> - Handling of Session Data in a LB cluster: leverage the >> above-mentioned tools (e.g. LB's sticky sessions) or simply use Zend >> Server's Session Clustering[7] > The above is closer to what I am more familiar with in Plone setups. > The image in the URL illustrates how large sites in Plone are > configured: > > http://developer.plone.org/_images/zeo_cluster_load_balanced.png > > I guess the above detailed by Ariz is how you would do it with > PHP-based applications. > > > > Holden > _________________________________________________ > Philippine Linux Users' Group (PLUG) Mailing List > http://lists.linux.org.ph/mailman/listinfo/plug > Searchable Archives: http://archives.free.net.ph _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List http://lists.linux.org.ph/mailman/listinfo/plug Searchable Archives: http://archives.free.net.ph
