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Infrastructure as code (IaC) is the process of managing and provisioning computer data centers through machine-readable definition files, rather than physical hardware configuration or interactive configuration tools. Both physical equipment such as bare-metal servers as well as virtual machines and associated configuration resources are called “infrastructure”, although they have nothing to do with actual infrastructure. The definitions may be in a version control system. It can use either scripts or declarative definitions, rather than manual processes, but the term is more often used to promote declarative approaches.

Infrastructure as code approaches are promoted for cloud computing, which is sometimes marketed as infrastructure as a service (IaaS). IaC supports IaaS, but should not be confused with it.

Methods of Infrastructure as Code

There are two methods of IaC: ‘Push’ and ‘Pull’ . The main difference is the manner in which the servers are told how to be configured. In the Pull method the server to be configured will pull its configuration from the controlling server. In the Push method the controlling server pushes the configuration to the destination system.