Tag Archives: devops

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The 5 Layer Model of Compute in Immutable Infrastructure

Introduction Designing systems for Immutable Infrastructure requires a deep understanding of how compute is deployed and configured in virtual and cloud environments. In order to help practitioners better understand this architectural paradigm I have created a 5 Layer Model for Compute in Immutable Infrastructure. The following is a high level overview of this model, what the layers are, and how they are deployed. It is meant to be used as… Read More »


Infrastructure Management with SaltStack: Part 3 – Reactor and Events

The Journey So Far: Infrastructure Management with SaltStack: Part 1 – The Setup Infrastructure Management with SaltStack: Part 2 – Grains, States, and Pillar Introduction By now I hope I have demonstrated the power of Salt and the simplicity underlying its configuration. Now we take another step down the salty path of Data Center management. The salt-master to salt-minion conversation to this point has been largely one way. Let’s discuss… Read More »


Infrastructure Management with SaltStack: Part 2 – Grains, States, and Pillar

Introduction In Infrastructure Management with SaltStack: Part 1 I introduced Salt and covered installing and basic use. In this post I’ll be going a bit deeper and discuss grains, The State system, and pillar system. This post is all about targeting minions and configuration management. Up to now every time we have invoked a command on a minion we have used the syntax salt “*” module.command. The “*” glob is the… Read More »


Infrastructure Management with SaltStack: Part 1 – The Setup

Introduction Lately there is quite a bit of talk in IT circles about devops and programmatic configuration management. During these conversations two names come up over and over, Puppet by Puppet Labs and Chef (née Opscode). There is a third option that deserves attention as well, Salt by SaltStack. Salt was developed by Tom Hatch and first released in 2011. Unlike the Ruby based Puppet and Chef it written in… Read More »