What is infrastructure as code, and how does it work? Learn the fundamentals, as well as the advantages and best practices.

What is infrastructure as code?

Infrastructure as code is a software-based approach to automating IT infrastructure provisioning and administration. This method allows developers to create and deploy the infrastructure components required to support applications as they are built, enhancing agility. IAC uses descriptive code, which resembles the DevOps approach to source code in many aspects. As a result, IAC allows for faster deployment and cross-team collaboration without adding complexity.

However, it cannot sacrifice speed for control, compliance, or security. As a result, developers must collaborate closely with centralized operations teams to ensure that observability is built into the development process.

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What challenges does IAC solve?

IAC provides a solution to the problem of complicated infrastructure environments. Hundreds of apps — each with infrastructure requirements based on architecture, function, traffic, and other factors — are common in large enterprises. As the number of unique environments grows, new deployments become more complex, as modifications to one stack may not have the same impact on others.

As a result, IT personnel are frequently forced to undertake time-consuming, manual tasks. It is also challenging for operations teams in this situation. Operations teams have more difficulty observing and managing their environment since they are generally centralized and distanced from the development process. It might result in performance and security issues, costing businesses time and money. On the other hand, IT teams can use IAC to automate these operations and focus on more business-critical concerns.

Breaking down the benefits of infrastructure as code

Making the switch to IAC has several advantages, including the following:

• Speed. Organizations can optimize their software development lifecycle by automating infrastructure deployment and configuration, producing higher-quality software faster, and boosting cross-team cooperation.
• Consistency. Developers may provision applications based on best practices with code-based infrastructure, reducing the risk of human error and freeing system administrators to focus on more critical responsibilities.
• Alignment. Because the developers who know the applications and their infrastructure requirements best may describe these requirements as they create, IAC enhances cross-team collaboration and alignment.

How does IAC work?

IAC automates infrastructure configuration and duties such as resource management and monitoring to streamline IT processes, maintain consistency, and give visibility.

In practice, IAC develops scripts that describe desirable end states by defining the desired end state or laying out a series of procedures to accomplish the desired end objective. In both cases, the goal is to establish infrastructure environments that are repeatable and identical to reduce total complexity.

Weighing the different approaches to infrastructure as code

There are two forms of IAC: imperative and declarative. Declarative IAC creates a framework for the final product, whereas urgent IAC provides detailed directions.

Imperative IAC defines the commands that specify infrastructure settings. In this approach to IAC, object-oriented programming languages like Java or C++ are used.

Declarative IAC, on the other hand, outlines the final state of infrastructure but leaves it up to the user to figure out how to get there. IT teams typically use languages like SQL or Haskell for declarative IAC.

Exploring IAC best practices

While there is no one-size-fits-all approach to deploying IAC, a few best practices can help teams implement and use it more efficiently. 

• Always. Because IAC is a program, one must test it regularly. It is similar to software development in that more testing leads to more dependable results. 
• Make a single source of truth your top priority. All infrastructure requirements and instructions should be kept in configuration files by developers. As a result, all IAC operations have a single source of truth. 
• Implement version control. A source of truth will emerge through time. It’s critical to use version control solutions so that teams know what has changed, when, and why. 
• Reduce the amount of paperwork you have. One of the most significant advantages of IAC is the reduction of complexity through automation. Over-documentation reintroduces this problem and can result in out-of-synch environments and configuration data. Configuration files require less documentation since they are a single source of truth. 
• Organize surveillance at a large scale. While IAC is effective, it adds a degree of abstraction that might cause teams to lose sight and control. Developers must incorporate observability throughout the development lifecycle to maintain visibility into how infrastructure affects application availability, performance, and security. Developers can specify, deploy, and instrument observability as they construct using monitoring as code.

Choosing the right infrastructure-as-code tools for your needs

Infrastructure-as-code solutions are intended to make setting and changing infrastructure even more accessible. They use one of two methods to achieve an objective: pushing or pulling.

A centralized server provides configuration data to particular systems in a push framework. The designs themselves initiate configuration data requests in a pull architecture. Most tools have only one approach by default, although organizations can modify it as needed.

Chef, Ansible, Terraform, and Puppet are some of the most popular tools on the market. However, the optimal fit for your IAC implementation is determined by your current needs and long-term objectives.

Infrastructure as code made easy with automatic and intelligent observability

Infrastructure as code can help you speed up deployments, save money, increase consistency, and match with DevOps goals. However, the transition to IAC is not made in a vacuum. As-code solutions, as part of larger IT environments, necessitate improved observability and monitoring to provide a good return on investment. While infrastructure-as-code tools make it easy to quickly spin up identical infrastructure setups that simplify provisioning and management, even minor faults can soon escalate into significant difficulties if replicated at scale.

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