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High-Availability Openstack on a shoestring budget: Deploying a Minimal 3-node Cluster

As OpenStack deployments mature from evaluation/development to production environments supporting apps and services, high-availability becomes a key requirement. In a previous post, we showed you how to cluster the database backend - which is central to the operation of OpenStack. In that setup, you would have two controllers, while placing a 3-node Galera cluster on separate hosts.

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Using BitTorrent Sync to Transfer Database Backups Offsite

BitTorrent Sync is a simple replication application providing encrypted bidirectional file transfers that can run behind NAT and is specifically designed to handle large files. By leveraging the simplicity of Bittorrent Sync, we can transfer backup files away from our cluster, enhancing the backups availability and reducing the cost of broken backup, where you can regularly verify your backups off-site.

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Clustering MySQL Backend in OpenStack

OpenStack uses a database to store data for all OpenStack services such as compute nodes available, running instances, state and so on. The DB takes part in every user request, from listing all instances to creating new VMs, so it is central to the operation of OpenStack. In a high availability environment, the database should be clustered so as to avoid a single point of failure (SPOF). 

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How to Scale Joomla on Multiple Servers

Joomla! is estimated to be the second most used CMS on the internet after WordPress, with users like eBay, IKEA, Sony, McDonald’s and Pizza Hut. In this post, we will describe how to scale Joomla on multiple servers. This architecture not only allows the CMS to handle more users, by load-balancing traffic across multiple servers. It also brings high availability by providing fail-over between servers.

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How to Cluster Magento, nginx and MySQL on Multiple Servers for High Availability

Magento is an open-source e-commerce platform built on Zend PHP and MySQL. It is widely adopted by online retailers with some 150,000 sites known to use it. Single server setups are easy to set up, but if your store is a huge success, then you probably need to think about clustering your environment with multiple servers. Clustering is done at the web, database and file-system level, as all web nodes need access to catalog images. 

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Scaling Wordpress and MySQL on Multiple Servers for Performance

Over the years, WordPress has evolved from a simple blogging platform to a CMS. Over seven million sites use it today, including the likes of CNN, Forbes, The New York Times and eBay. So, how do you scale Wordpress on multiple servers for high performance? 

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Nagios Plugin for ClusterControl

Nagios is a very popular open source IT infrastructure monitoring tool, used by sysadmins to watch out for problems in their systems. If you use Nagios and would like to utilize it to monitor your database cluster, we have built a simple Nagios plugin for ClusterControl which can report on the status of your database cluster. The plugin is Nagios Plugin API v3.0 compatible.

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