Agile/Scrum blog

Onderwerp: architecture

Technical Agile Coach

Door: Marco Kroonwijk ,  23-02-2015
Onderwerp: Technical Coach  Continuous Delivery  CD  Extreme Programming  XP  Agile Coach  Technical Debt  Architecture  Development Team  Role  Craftsmanship  Practices  

A while ago, I started working at Prowareness, and as new employees we choose our own role title best fitting our experience, skills, ambition and passion. I chose the title of Technical Agile Coach, without really having defined what it actually is. It just felt right!

However, occasionally, people ask me what a technical coach does and what the difference is with “other” Agile Coach titles. So here’s what that answer is, for me.

Continuous Deployment - Remote execution of PowerShell scripts from your build process

Prajeesh Prathap Door: Prajeesh Prathap,  29-09-2014
Onderwerp: CD  PowerShell  TFS  architecture  

Including Windows PowerShell script as part of your build and deployment process, brings you the flexibility of easily and effectively customize your packaging and deployment process. With the proper combination of environment configuration files (XML) and PowerShell scripts you can achieve the impossible. This post will show you how to run Windows PowerShell scripts remotely from a TFS build process.

Using CredSSP for second-hop remoting
One common issue with PowerShell remoting is the “double hop” problem. When the scripts are executed remotely on a Server A and then it tries to connect from Server A to Server B, the second connection fails to send the credentials to that server. As a result the second server fails to authenticate the request and rejects the connection. To get around this issue you need to use the CredSSP authentication mechanism in PowerShell.

Continuous Delivery – Patterns for zero downtime requirements (ARR setup)

Prajeesh Prathap Door: Prajeesh Prathap,  17-08-2014
Onderwerp: Continuous delivery  CD  zero downtime deployment  agile  architecture  

Microsoft Application Request Routing (ARR) is a proxy-based routing module that forwards HTTP requests to application servers based on HTTP headers, server variables, and load balance algorithms. With ARR you can increase application availability and scalability by better utilization of content server resources with lower management cost by creating opportunities for shared hosting environments.

Continuous Delivery – Patterns for zero downtime requirements

Prajeesh Prathap Door: Prajeesh Prathap,  27-07-2014
Onderwerp: Continuous delivery  CD  zero downtime deployment  agile  architecture  

One of the main problems teams face when practicing continuous delivery is to manage zero downtime deployments to the production environments. The goal is to deploy as soon as possible and depending on the heartbeat of the organization, this becomes a higher priority to manage active users without losing their data and sessions during a deployment process. In this post I'll share some of the ideas and approaches that are been used for achieving the goal of zero downtime deployments.

An important process for reducing risks and managing a zero deployment downtime is by following the blue-green deployment technique. In a blue-green deployment scenario, the approach is to bring up a parallel green environment and once everything is tested and ready to go, you simply switch all the traffic to the green environment and leave the blue environment idle. This also helps in easy rollback and switch to the blue environment if anything goes wrong in the current installation.