Understand the differences between containers and VMs A natural response when first working with Docker containers is to try and frame them in terms of virtual machines. Oftentimes we hear people describe Docker containers as “lightweight VMs”. This is completely understandable, and many people have done the exact same thing when they first started working with Docker. It’s easy to connect those dots as both technologies share some characteristics, but the key is that the underlying architecture is fundamentally different between containers and virtual machines.
Last Tuesday, I was together with two colleagues at the AWS Enterprise summit in the World Forum in The Hague. This was for me the second AWS summit that I attended. The event started with a keynote from Ian Massingham, Chief Evangelist (EMEA), AWS. Ian spoke about the impact that cloud has on enterprise IT. After the keynote, there was a plenary session by Hans Koolen, Senior Director, Philips IT Global Services.
VMware has released during the different VMUG and VMworld events, posters of some of their products. These posters are made by Technical Marketing and can be do wnloaded as pdf. These posters can be used as reference cards. You can find the posters at this link. For example the VMware vCloud suite.
Yesterday I was together with two KPN colleagues at the meetup from Docker Randstad. The meetup was hosted by Blendle in the center of Utrecht. Blendle also arranged the food and drinks. After everybody had some time to eat a slice of pizza, the official part of the evening started. Before the sessions started, Blendle was given the opportunity to tell how they use Docker. First presenter was Stijn Polfliet, founder and ceo of CoScale.
DRS Doctor is a command line tool that can be used to diagnose DRS behavior in VMware vCenter clusters. When run against a DRS enabled cluster, it records information regarding the state of the cluster, the work load distribution, DRS moves, etc., in an easy to read log format. The goal of DRS Doctor is to give VI admins better insight into DRS and the actions it performs. It is very useful for analyzing DRS actions and troubleshooting issues with very little overhead.
Docker is a scalable, open source technology that allows you to wrap all your code and supporting files into single bundles, known as containers. Get to grips with these efficient, reusable containers to develop sophisticated software solutions with this handy eGuide. You can get the book here