Continuous configuration automation Īll continuous configuration automation (CCA) tools can be thought of as an extension of traditional IaC frameworks. Now enterprises are also using continuous configuration automation tools or stand-alone IaC frameworks, such as Microsoft’s PowerShell DSC or AWS CloudFormation. Traditionally, server (lifecycle) automation and configuration management tools were used to accomplish IaC. Broadly speaking, any framework or tool that performs changes or configures infrastructure declaratively or imperatively based on a programmatic approach can be considered IaC. There are many tools that fulfill infrastructure automation capabilities and use IaC. In the push method the controlling server pushes the configuration to the destination system. In the pull method the server to be configured will pull its configuration from the controlling server.
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The main difference is the manner in which the servers are told how to be configured. There are two methods of IaC: push and pull. Imperative defines specific commands that need to be executed in the appropriate order to end with the desired conclusion. The declarative approach defines the desired state and the system executes what needs to happen to achieve that desired state. The declarative approach focuses on what the eventual target configuration should be the imperative focuses on how the infrastructure is to be changed to meet this. The difference between the declarative and the imperative approach is essentially 'what' versus 'how'. There are generally two approaches to IaC: declarative (functional) vs. The lack of tests can lead to a lack of confidence in infrastructure deployments, or introduce a high barrier to entry for testing.
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The lack of Turing completeness may inhibit an author from offering software tests in the same language as the infrastructure definition. IaC uses machine readable definition files, and may or may not be Turing complete. These outcomes and attributes help the enterprise move towards implementing a culture of DevOps, the combined working of development and operations.
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Automation removes the risk associated with human error, like manual misconfiguration removing this can decrease downtime and increase reliability. Infrastructure automation enables speed through faster execution when configuring your infrastructure and aims at providing visibility to help other teams across the enterprise work quickly and more efficiently. Cost reduction aims at helping not only the enterprise financially, but also in terms of people and effort, meaning that by removing the manual component, people are able to refocus their efforts towards other enterprise tasks. The value of IaC can be broken down into three measurable categories: cost, speed, and risk.
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The ability to treat infrastructure like code and use the same tools as any other software project would allow developers to rapidly deploy applications. The thought of modelling infrastructure with code, and then having the ability to design, implement, and deploy application infrastructure with known software best practices appealed to both software developers and IT infrastructure administrators.
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With new tools emerging to handle this ever growing field, the idea of IaC was born.
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In 2006, the launch of Amazon Web Services’ Elastic Compute Cloud and the 1.0 version of Ruby on Rails just months before created widespread scaling problems in the enterprise that were previously experienced only at large, multi-national companies. IaC grew as a response to the difficulty posed by utility computing and second-generation web frameworks.