Case Study: Varnish Load Balancer for 1 Million Visitors

Recently, we had to setup Varnish load balancer for a website having 1 Million visitors per day. Provisioning load balancer based on this scale is a challenging task. We need to do several benchmarking tests in order to reach our optimum solution. Let us see how we did the load balancer setup for supporting [...]

Case Study: WebSockets with AWS Autoscaling

Customer Problem The client was facing frequent downtime and heavy resource usages on his website hosted in Amazon AWS instance. So he needs to ensure High Availability ( HA ) for his website. The client's requirement was to setup a loadbalancer to ensure high avaliablity and also he needed caching for faster content [...]

2018-09-27T12:38:35+05:30September 27th, 2018|Server Administration, Server Management|0 Comments

VMware Backup with Veeam Backup and Replication

Veeam Backup and Replication is a tool used as a backup and availability solution for VMware, Hyper-V and physical servers with Windows or Linux as the guest OS. It is a flexible and reliable backup and recovery solution for virtualised data and application level like Active Directory and SQL server. Veeam is used as [...]

2018-07-30T12:34:40+05:30July 27th, 2018|Server Administration|0 Comments

PowerDNS Authoritative Server with DNSSEC

PowerDNS is a free and open source DNS server with great features. The GUI is very handy and easy to manage. It has commands to manipulate the DNS records and zones. It supports all Linux platforms. Let's see how to install PowerDNS authoritative server with DNSSEC. You need a fresh Linux server. Recommended configuration - [...]

VMware restore with Veeam Backup and Replication

Backup and recovery of a virtual machine can be a daunting task. Veeam Backup and replication provides an efficient way to backup, restore and replicate data across multiple storage locations. Veeam Backup and replication has moved from just a backup tool to an availability tool. It enables backup of virtual, cloud and physical server backups [...]

2018-06-05T10:09:05+05:30May 29th, 2018|Server Administration|0 Comments

VMWare Automation Tools

"Will automation replace today’s system administrators? Well, it is the skilful use of these tools that will foster their credibility." Introduction Virtualization is meant to ease the life of a system administrator, physical and hardware infrastructure that created a lot of bottlenecks have been eliminated over the years. However, [...]

VMware Cloud on AWS

VMware Cloud on AWS is a unified Software Define Data Centre (SDDC) platform that integrates vSAN, VMware vSphere, and NSX virtualization technologies. It is optimized to run on a very flexible, dedicated, bare-metal Amazon Web Services infrastructure and offers a variety of AWS services including functionalities, elasticity, and security. The vSphere allows administrators to operate [...]

Installing Asterisk PBX 13 on CentOS

Asterisk is an open source framework to set up communications over IP phones. Asterisk software coverts the normal server for communications servers. It supports VoIP gateways, conference servers. Nowadays most of the businesses organisation and government agencies & call centres using Asterisk as their communications platform. Mainly asterisk voice quality is amazing with latest [...]

2018-04-16T17:44:59+05:30April 11th, 2018|Server Administration|0 Comments

VMware NSX Overview: Security Use Case

VMware NSX is as a product of the Software Defined Data Centre (SDDC) which provides a network virtualization platform that uses micro-segmentation to define fine-grained security in the data center. Virtualization with NSX duplicates Layer 2 to Layer 7 of the Networking model which allows for complex and multiple tier network topologies setups in [...]

VMware vSphere High Availability

vSphere HA is a recommended low-cost ESX’s feature that monitors virtual machines in a resource pool and detects downtime. In cases of downtimes, it powers on the virtual machines using resources on another host within the same cluster. The powering on is possible since the virtual machine disk (VMDK) are all kept within a [...]