Windows Server 2016 Technical Preview 5 was released on 27th April 2016 & it’s well known by now that it supports docker with its windows server containers. Microsoft also started uploading windows server core with various application as docker images to docker hub. I was wondering whether it’s possible to run Windows 2016 TP5 on an EC2 instance and launch a windows container inside the EC2 instance. EC2 officially supports only upto Windows 2012 R2 and I couldn’t find any 2016 AMI’s in Ireland region. Read more

Amazon did a limited release of the programmable Dash button and unsurprisingly it got sold out within a day. It’s stated in amazon.com that “We don’t know when or if this item will be back in stock.”, hence you might need to wait to get one. I take this opportunity to write a post about how I used the AWS IoT button that I received in AWS re:Invent 2015 to show case AWS IoT to the team. Read more

Blue/Green deployment is a well-known method to deploy an application without any downtime. Performing DNS switch is one of the very common techniques to achieve this. Using DNS switch has a minor issue with DNS caching which might take some time for DNS change to be propagated. Apart from DNS switch, AWS gives us two different options to switch the stacks. One is to have single ELB and swap it across auto-scaling group and another is switching the launch configuration of the auto-scaling group. Read more

If you had noticed, there has been a gap of few weeks since my last post. I went off the radar to prepare for AWS Certified Solution Architect Professional exam. Lots of learning and completed it successfully. I can’t provide any details on the questions since I have signed a NDA. But I shall provide some suggestions based on my experience. Read through the blue print and understand the weight-age for different sections. Read more

Let’s Encrypt is a free and open certificate authority managed by a public benefit organization called ISRG which concentrates on the security communication over the Internet. There are many technology companies like Mozilla, Akamai, EFF, Cisco, IdenTrust, Facebook, etc are sponsors and the platinum sponsors have a seat in their Technical Advisory Board. It uses Automated Certificate Management Environment (ACME) protocol to enable communication between the certification authority and the web server to which the certificate is issued. Read more