August 6, 2018

Amazon VPC Basics

For the past five weeks we have been getting deep in our Scalable Solutions series.  At Entasis we work with our customers to help them build solutions that are Scalable in design, Resilient by nature, with Performance on demand.  We feel that these three components are the pillars that all truly scalable solutions are built with.  Here is what we have gone over thus far: […]
July 30, 2018

Amazon EC2 Security Groups

In this installment of our Scalable Solutions series we are going to be reviewing one of the core components of EC2, the security group.  We have found that our customers find that the elasticity provided by security groups allows them to build more resilient solutions and expand them as performance dictates it, with consistent security policies. In case you missed our previous articles you may […]
July 23, 2018

AWS Application Load Balancer

This week in our Scalable Solutions series we are going to be covering the Elastic Load Balancer (specifically the Application Load Balancer or v2). At Entasis we help our customers build elastic and resilient solutions with performance on-demand.  If you need help finalizing your design, or implementing your vision please don’t hesitate to reach out to us at sales@entasistech.com.  Also if you are just looking […]
July 16, 2018

AWS Systems Manager Parameter Store

At Entasis we help our customers understand and modify their technology stacks so that scaling is a function of cost not a function of technology.  However when we look at scaling one of the largest problems is the consistency of an environment.  When we are running 100 application nodes then the opportunity for one node to go sideways and start handling traffic differently is much […]
July 9, 2018

AWS Certificate Manager

Today we are going to take a look at another one of my favorite services.  AWS Certificate Manager.  In this exploration we are going to be interacting with JSON which Powershell makes more difficult then it ought to.  So please keep in mind that if you are using the AWS CLI on bash or cygwin or similar your mileage will vary (especially where it comes […]
July 2, 2018

Amazon Route 53 Basics

This post will kick off a series on Scalable Solutions.  Entasis uses a strong architectural emphasis in our AWS Solutions Group to deliver solutions that are Elastic by nature, Resilient in design, with Performance on demand.  These are the three pillars of Scalable Solutions.  In this series we will be going through some of the architectural components and decisions which allow us to design and […]
December 28, 2015

Linux: Replace Disk in MD

On my lab machines I use a pair of physical disks, configured in a RAID 1 with MD, with LVM on top of that.  This gives me a lot of flexibility with full redundancy.  However recently I had a failure of a drive. Identify the Failure Here is what MD was telling me after I identified and removed the drive from the chassis to send […]
September 16, 2015

Bash: Dynamic Volume Group Mounter

This is similar, but an enhanced version of my custom_mount.sh previously published here: Bash: Automatically Mount File Systems on Volume Group if Present. This previous version was just a simple init script.  This updated version is designed for newer Linux distributions that use Systemd instead of Init. The Code The majority of the work is done by dvgmounter.sh.  It will check if the Volume Group is […]
September 15, 2015

Fedora 20: Use PPTP VPN

I have had this one in the queue for a while (I don’t even run of Fedora 20 anymore).  This one will be short and sweet, because there really isn’t a bunch of discussion that needs to go into it. By default Fedora 20 will block outbound PPTP VPN connections. Reload the rules.
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