What is Infrastructure
as Code and who can benefit?

Angelika Agapow
Angelika Agapow
Content Marketing Specialist
May 10
23 min


As software systems become increasingly sophisticated and complex, businesses require a more innovative approach to their technological infrastructure.

In 2020, the State of IT Infrastructure Report revealed that three-quarters of companies are in need of upgrading their IT infrastructure in order to integrate new technologies. Despite this, a surprising number of organizations still employ manual labor when setting up, operating, and managing their infrastructures.

This trend has resulted in delays, errors, inconsistencies, and discrepancies, causing further delays in technological advancements. Inefficiencies such as these are a waste of the talent and skills of employees, with many capable of contributing to the innovative growth of their companies but instead being tied to repetitive tasks. Manual labor also brings elevated costs and management overheads, further straining businesses.

The use of Infrastructure as Code is crucial in automating and optimizing business processes. Infrastructure as Code effectively utilizes automated workflows to aid in the provisioning and management of IT infrastructure. By using Infrastructure as Code, manual labor is greatly reduced, resulting in more significant cost and time savings. This enables businesses to focus on more innovative ventures that help drive their overall success. Therefore, understanding how to utilize Infrastructure as Code is a key element in staying ahead of the competition and driving growth.


What is Infrastructure as Code?

Infrastructure as code (IaC) is a modern and highly effective DevOps methodology that utilizes versioning and a descriptive model to define and deploy complex infrastructure, such as networks, virtual machines, load balancers, and connection topologies. By employing this approach, IaC enables organizations to achieve greater automation and repeatability in their software delivery pipelines.

One of the key advantages of IaC is that it ensures consistency in the deployment of infrastructure, which is an essential aspect of any application delivery process. With IaC, every deployment generates the same environment, thereby eliminating the risk of inconsistencies in the deployment process.

Moreover, IaC provides a unified set of practices and tools for DevOps teams to collaborate and deliver applications and supporting infrastructure rapidly and reliably at scale. This is achieved by utilizing a centralized code repository that helps in the management, tracking, and versioning of the IaC codebase.

Another advantage of IaC is that it allows for greater agility and flexibility in infrastructure deployment. This is because it enables teams to quickly provision and de-provision infrastructure resources on-demand, which significantly reduces the time-to-market for new features and applications.

IaC is an essential component of continuous delivery and a crucial factor in DevOps success. By utilizing this powerful methodology, organizations can achieve higher levels of automation, consistency, and agility in their application delivery pipelines, ultimately resulting in faster time-to-market, improved quality, and increased customer satisfaction.


How does Infrastructure as Code work?

The practice of Infrastructure as Code (IaC) revolutionizes the way developers handle infrastructure configurations. Instead of manually configuring infrastructure for each stage of software development, IaC allows developers to define configuration parameters in a domain-specific language (DSL) and store them as manifest files. These manifest files are easy to reuse, edit, copy, and share, making building, testing, staging, and deploying infrastructure quicker and more consistent.

The process of building infrastructure through IaC is straightforward and follows three steps. First, in-house or third-party developers codify infrastructure specifications in a domain-specific language. Second, the files are then transmitted to a master server, accord repository, or management application programming interface (API). Finally, the platform for creating the infrastructure follows the steps outlined in the code and configures the computer resources accordingly.


The architecture of Infrastructure as Code

Imperative and declarative methods

There are two main methods of using IaC, the imperative method, and the declarative method:


Imperative method

The imperative method involves the developer providing step-by-step instructions for the IaC to follow to achieve the desired solution. This method, which is organized around human thinking, gives the user full control over how automation happens. It is an efficient method that allows the user to automate every detail and layer of command for specific purposes.


Declarative method

The declarative method involves the user describing the solution they need and how it should look. They provide a blueprint for the final solution and leave the process of achieving it to the IaC. This method does not require much knowledge of IaC, making it accessible to anyone who needs it. Its greatest advantage is that it emphasizes the idempotent feature of IaC more than the imperative method, meaning that the code can be deployed multiple times in any manner, as long as it gives the results indicated by the user.

Both methods of using IaC have their advantages and disadvantages, depending on the specific needs of a user. Regardless of the method used, IaC remains a powerful tool that enables teams to manage infrastructure efficiently and effectively. Ultimately, the choice of the method used boils down to the specific needs of a user.


The process of IaC

Infrastructure as Code (IaC) is a process that simplifies the management of IT infrastructure. This process involves creating infrastructure using code, allowing developers to streamline their operations and accelerate their work.


#1 Writing the specifications for the infrastructure. This can be done using a domain-specific language, such as Hashicorp Configuration Language (HCL) or SQL. At this stage, the developer sets out the requirements for the infrastructure, making it the foundation of the subsequent creation process. It’s worth noting that the initial specification file can be used as a template for future modifications, making it an invaluable resource.

#2 The specifications are sent to a master server, code repository, or management API, facilitating the implementation of the infrastructure. Two methods can be used to send the specifications, the Pull or Push methods. With the Push method, instructions are sent from the control server to the destination system. In contrast, with the Pull method, the system needing configuration acquires it from the server. These two methods enable seamless communication between the server and the system, allowing developers to make any necessary modifications.

#3 Implementation. At this stage, the platform creates and configures the infrastructure’s resources with some steps by following the specifications outlined earlier. Declarative tools are preferred for IaC as they automate the implementation process, reducing the possibility of user errors. In contrast, the imperative method can be prone to errors, as the specifications are implemented following the steps the user provided.


Provisioning and configuration management

Infrastructure as Code (IaC) tools are becoming increasingly popular in the software development and deployment process. These tools are divided into two main categories: provisioning and configuration management. Each step plays an important role in the overall deployment process.


Provisioning management

It is primarily focused on setting up the IT infrastructure, which includes virtual machines, databases, and access to necessary resources. This stage is responsible for ensuring that everything required to support the software application is in place and available to users. Once the infrastructure is provisioned, the next stage of the deployment process can begin.


Configuration management

It is responsible for installing software, configuring servers, and maintaining the desired state of the infrastructure. This stage comes after provisioning and ensures that the infrastructure remains stable and functional over time.

While some IaC tools can perform both provisioning and configuration management tasks, most are designed to be more proficient at one stage or the other. Therefore, it is important to choose the right tool for each stage of the deployment process to ensure a successful and efficient workflow.


Mutable and immutable infrastructure

The choice between a mutable and immutable infrastructure can have significant implications for an organization’s operations. This decision represents a trade-off between flexibility and consistency.


Mutable infrastructure

It is designed to be modified and updated as business needs evolve. The ability to make changes easily can be beneficial, but it comes with a cost. Each update introduces potential vulnerabilities and weak points that hackers can exploit. Additionally, frequent changes can reduce consistency across the infrastructure, leading to problems with testing and deployment.


Immutable infrastructure

It is deployed and then left untouched. Any updates or alterations require a completely new version. While this may seem restrictive, there are significant benefits to this approach. Immutable infrastructures offer greater consistency and predictability since each version is independent of others. Furthermore, since versions are kept track of, it becomes easier to identify and remediate mistakes. Should problems occur, rolling back to a previous version is also a simpler process. This makes immutable infrastructures a popular choice for organizations seeking to reap the benefits of Infrastructure-as-Code (IaC).


Why traditional architecture no longer succeeds?

The traditional approach to managing IT infrastructure has long relied on manual processes. This has inevitably led to human errors and increased costs for businesses that rely on these systems.

Such manual actions require significant resources, with enterprises needing to hire experts and dedicate management teams to control processes that are both tedious and complex. This ultimately creates a cumbersome overhead and complicates communication within an organization.

One of the most significant drawbacks of manual processes is the time and effort required to configure servers to meet the needs of the operating system and applications before deployment. This process is hard, time-consuming, and requires specialists to perform a range of complicated tasks. Such complications make it difficult for businesses to scale up and respond to the increasing demands of their users. It also puts enterprise applications at risk, as any delays or technical shortcomings can lead to extended periods of unavailability. This can harm customer satisfaction and damage a brand’s reputation.

Moreover, identifying the cause of IT infrastructure issues tends to be a slow and difficult process without continuous monitoring.

IT professionals will often spend considerable time trying to troubleshoot and find the root cause of the issues. This leads to a significant loss of productivity throughout the organization and further complicates the process of scaling up and ensuring peak performance.

Enterprise organizations, therefore, need to embrace the latest Infrastructure as Code (IaC) solutions that enable them to automate processes, streamline configurations, and monitor systems continuously. This will reduce the risk of issues, improve service provision, and enhance the reputation of businesses for their customers.


IaC vs IaaS

In the realm of cloud computing, both Infrastructure as a Service (IaaS) and Infrastructure as Code (IaC) are essential concepts that play a crucial role in the design and development of efficient cloud infrastructures. While both these concepts pertain to infrastructure in a cloud environment, they are vastly different in their implementation and can be used in various scenarios.

When it comes to IaC, organizations have more control over the setup of their infrastructure, as they can code it as per their specific requirements. The resulting system is tailor-made to their specifications, which makes it possible for creative, innovative infrastructure designs that can be developed in-house. This level of customization can help organizations optimize their systems to perform the specific tasks at hand, resulting in greater efficiency and cost savings. Furthermore, IaC offers a high degree of automation, which can reduce the workload on IT teams and streamline infrastructure management.

On the other hand, IaaS is a cloud computing service provided by a third-party provider that allows organizations to rent computing resources over the Internet. The provider is responsible for the setup and maintenance of the infrastructure in a cloud environment, while the organization has control over the applications, operating systems, and data used on that infrastructure. This model is well-suited for organizations that require a quick and easy setup of their cloud infrastructure or do not have the technical expertise to set up and manage their infrastructure in-house. However, this approach may lack the level of customization and control that companies require for their specific needs.

Read more about IaaS or other services such as PaaS and SaaS in our How to get the best out of Azure for your business.


Infrastructure as Code: tools

There are several IaC tools available on the market today that specialize in different aspects of infrastructure management and provisioning.

  • Terraform: One of the primary contenders in the IaC space is Terraform. This powerful tool can help deploy infrastructure in various platforms, including AWS, Azure, Kubernetes, and Alibaba Cloud. Terraform’s infrastructure management functions guarantee the desired configuration setup across platforms.
  • Ansible: This open-source configuration management tool has IaC capabilities and offers wide infrastructure provisioning features while lacking infrastructure management functions. Ansible’s strength lies in its role-based system and simplicity in automating repetitive tasks and configurations.
  • Pulimi: It is another IaC tool that provides infrastructure setup and management features. Its main advantage is its language flexibility, which includes Python, TypeScript, JavaScript, Go, and C#.
  • Chef: It is a robust configuration management system that boasts excellent automation functions as well as infrastructure management features. Chef offers easy integration into DevOps practices alongside effective collaboration tools.
  • CFEngine: It is an IaC tool that specializes in configuration management rather than infrastructure management. This tool can be useful in responding to complex configuration requirements and supporting IT governance.
  • AWS CloudFormation: It’s a platform that enables users to manage AWS infrastructure. If your enterprise is already utilizing AWS cloud services, you can benefit from its seamless integration with your existing infrastructure.


Overall, IaC tools offer significant advantages in automating IT infrastructure management processes. By choosing the right tool, enterprises can increase speed, efficiency, accuracy, and scale while reducing errors, inconsistency, and time-consuming manual processes.


Infrastructure as Code and DevOps

DevOps is built on the principle of treating infrastructure the same way developers treat code. With infrastructure as code (IaC), organizations can achieve consistency and increase efficiency while reducing costs. IaC enables developers to implement changes to infrastructure using code, which can be tracked and managed as part of the application code.

Check out our DevOps guide and learn more about how it works.

Implementing infrastructure changes with IaC is an iterative process, enabling organizations to modify their infrastructure as needs changes and updates are required. This makes IaC a critical asset for DevOps teams, who can maintain a unified set of practices and tools to deliver applications and infrastructure efficiently and reliably at scale. IaC also helps to identify issues early in the development cycle through automated testing, thus preventing common deployment issues.

IaC simplifies the provisioning process, freeing up developers to focus on the application code and preventing delays that occur when the infrastructure is not ready. Operations teams also benefit from IaC as they no longer need to perform manual tasks and can rely on consistency throughout the application life cycle.

Automating the deployment of applications relies on consistency in the deployment environment. DevOps best practices, including CI/CD, can be applied to infrastructure in IaC enabling automation and continuous monitoring throughout the application life cycle. All environments, including production, should follow the same deployment process and IaC generates the same environment every time it is used.

In addition to reducing costs and increasing efficiency, IaC brings alignment between development and operations teams by providing a common platform for describing application deployment. This allows both teams to work together, supporting a DevOps approach and reducing errors and inconsistencies. IaC also removes the need for maintaining individual deployment environments, ensuring that the production environment will be consistent.

IaC is an essential component of DevOps practices and CI/CD, providing consistency and organization to infrastructure management while aligning development and operations teams. Proper implementation of IaC will reduce costs, increase efficiency, and ensure reliability throughout the application life cycle.

Read more about enterprise DevOps service.


Infrastructure as Code and Azure

The Azure platform offers a highly effective method for implementing Infrastructure as Code (IaC) by leveraging the native support offered through the Azure Resource Manager model. By generating declarative ARM templates that specify the infrastructure requirements for solution deployment, teams can easily manage automated infrastructure with greater control and precision.

In addition, a number of third-party platforms such as Terraform, Ansible, Chef, and Pulumi also provide comprehensive support for IaC management. By integrating these tools into their workflow, businesses can successfully automate the infrastructure management process and ensure more efficient use of resources. These platforms offer a range of features including multi-cloud support, reusable code, and more advanced functionality such as role-based access control and policy enforcement.

The benefits of implementing IaC are numerous, including improved deployment speed, higher resource utilization, reduced errors and downtime, and simplified management and scalability. As such, it is vital for organizations to consider adopting these tools and methodologies to optimize their infrastructure management capabilities.


Infrastructure as Code and AWS

When it comes to infrastructure as code, the goal is to apply the same level of rigor and discipline to infrastructure provisioning as one would to application code development. In other words, all configurations should be defined in a declarative fashion and stored in the same source control repository as application code, such as AWS CodeCommit. This way, orchestration and deployment efforts can more easily leverage the principles of infrastructure as code.

In the past, provisioning infrastructure was a combination of manual processes and scripts. Documentation was often saved in the form of run-books or text files that contained detailed step-by-step instructions. However, this approach had several shortcomings. Often, the person who wrote the run-book did not end up being the same person who executed the scripts or followed the run-book. Moreover, if the scripts and documentation were not updated frequently, it could lead to unreliable or inconsistent environments, thus acting as a bottleneck in the deployment process.

AWS provides several DevOps-centric services for infrastructure creation and management. One of the key aspects is the ability to create, deploy, and maintain infrastructure programmatically, in a descriptive and declarative fashion. AWS services provide a level of rigor, clarity, and reliability that is essential to a DevOps methodology. These specific AWS services that are core to DevOps principles and practices include numerous higher-level AWS DevOps practices. By embracing this mindset and leveraging the services available on AWS, organizations can experience the benefits of agile, scalable infrastructure that is consistent, traceable, and reproducible.


Infrastructure as Code challenges

The implementation of Infrastructure as Code (IaC) has become increasingly popular, however, like every system, it comes with its own set of challenges that need attention to ensure seamless functioning.


Configuration drift

One of the biggest challenges is configuration drift, which occurs when changes are made to the configuration of servers, resulting in non-uniformity among systems. To counter this issue, infrastructure immutability must be maintained, ensuring that any modification is done in the pre-established workflow to keep the infrastructure in check.


Potential error duplication

Moreover, even with the automation of IaC implementation, there is a potential error duplication, especially when writing parent codes manually. These errors may occur in multiple machines, leading to possible security breaches, and making it crucial to regularly check the code-generating IaC architecture. It is important to conduct strict and consistent quality checks and rigorous auditing processes to ensure error-free implementation. However, the additional efforts required for quality assurance may lead to increased overhead.


It is essential to comprehend these challenges and take corrective measures to ensure that the benefits of IaC continue to outweigh the potential pitfalls. Organizations should assess their IaC implementation strategy, ensure infrastructure immutability, enforce proper code checks, and allocate sufficient resources toward a successful IaC implementation. By addressing these challenges, companies can reap the benefits of IaC while minimizing the risks.


Infrastructure as Code best practices

Adopting Infrastructure as Code (IaC) can be a complex and challenging task for organizations. However, there are several best practices that can simplify the experience of IaC adoption and help organizations maximize the benefits of this approach.


1. Maintain a Single Source of Truth

This involves coding all infrastructure specifications in configuration files and using them as the primary source of information for all infrastructure management activities. The centralized configuration files prevent uncertainty and discrepancies and eliminate the need for maintaining additional documentation outside the source of truth. By practicing the Single Source of Truth principle, organizations can mitigate the risks of information inconsistencies and realize faster, more reliable infrastructure.


2. Create and maintain version control

All configuration files should be unified in one location and version controlled to ensure the infrastructure is safe, secure, and available. By keeping all configurations in a version-controlled environment, changes to the codebase can be better managed, tracked, and reconciled, just like with regular application code. The use of source control tools such as Git, Mercurial, Subversion, or others to maintain versions of the IaC codebase provides an audit trail for code changes. Using version control also enables organizations to collaborate, peer-review, test, and manage code updates better.


3. Test and monitor configurations

Since IaC is actual code, it can and should be continually tested to avoid errors and inconsistencies. Additionally, IaC tools can provide systems that offer testing and monitoring options, allowing organizations to validate servers before they go into production. This practice ensures that any potential problems are detected before they become production issues, reducing the risk of costly system outages and downtimes.


4. Utilize CI/CD and quality control for the repository with your IaC

One crucial recommendation is the use of Continuous Integration and Continuous Deployment (CI/CD) tools and quality control for the repository with your Infrastructure as Code. Adopting this practice helps in maintaining a high-quality standard of your code and facilitates agile development and faster feedback loops from DevOps teammates or developers after any changes have been made. There are many test frameworks, such as Terratest for Terraform, available that allow us to write real-world tests. By covering everything with Terratest, an organization can benefit from greater confidence in infrastructure and eliminate or minimize unexpected problems.


5. Make your Infrastructure as Code modular

This process involves breaking down infrastructure into separate modules or stacks that can be combined in an automated fashion. This approach provides various benefits for infrastructure management. Firstly, it allows for greater control over who has access to which parts of your infrastructure code. This level of access control is particularly important when working with junior engineers who may not have expertise and familiarity with certain parts of the infrastructure configuration. Additionally, modularizing infrastructure naturally limits the number of changes that can be made to the configuration, making it easier to detect bugs and more efficiently manage infrastructure.


To implement the above IAC best practices, it is essential to invest in the right tools and technology and ensure to work with experts who have the experience and skills to support the IaC adoption process. By doing so, organizations can realize improved infrastructure agility, scalability, and efficiency while reducing costs, minimizing risks, and staying competitive.


Advantages of Infrastructure as Code

As the digital transformation of businesses accelerates, Infrastructure as Code (IaC) is quickly becoming an essential tool for staying competitive. IaC offers several advantages over traditional IT management approaches such as more cost-effective scalability and robust security measures that extend to disaster recovery solutions – all without sacrificing productivity.

Read how to succeed in business transformation.

Investing in this technology will undoubtedly benefit any organization looking to stay ahead in today’s rapidly changing landscape. Let’s look at these benefits right now:


1. Cost reduction

Automation of complex IT infrastructure configuration with IaC can help teams make the most out of their financial budget. By saving precious time, resources, and money on these crucial tasks, engineering experts are able to direct more energy towards mission-critical endeavours while also reducing costs from other necessary aspects such as wages. This surplus could then be used for potential investments in future decisions or improvements elsewhere within the organization.


2. Speed

Infrastructure development, monitoring, and management have been revolutionized by IaC. Automating processes such as virtualization to user account management boosts the speed of setup and modification drastically – offering a two-fold improvement in efficiency for developers as well as other teams working on projects. This is all possible due to simple code that increases clarity among team members which helps improve overall performance involving time savings along with greater accuracy.


3. Low risk of human errors

Infrastructure as Code (IaC) is a powerful tool that can help reduce the risk of human errors in building and deploying infrastructure. When engineers or IT personnel manually build infrastructures, there may be mistakes made throughout the process; similarly, when new team members come on board to manage existing infrastructure systems built by an outgoing expert, they will struggle with understanding them without proper documentation being available. IaC automates long processes by providing detailed reports on how exactly everything works which makes it easier for newcomers to continue managing without issue.


4. Improved consistency

Human error can have costly consequences, particularly when it comes to repeatable activities such as deployment and configuration. Infrastructure as Code (IaC) offers a solution; automating these processes ensures consistency that manual efforts often cannot achieve in the same timeframe. This improves efficiency while drastically lessening the chances of unwelcome downtime, resource waste, or even serious misconfigurations – all factors which could otherwise introduce inconsistencies in the system.


5. Eliminate configuration drift

Infrastructure as Code not only enables powerful automation but also guarantees a consistent and secure environment. IaC ensures that multiple deployments have no effect on the system other than the first – which is exceptionally useful for preventing configuration drift caused by manual changes to resources. With this approach of versioning your infrastructure codebase within CI/CD pipelines, you can easily detect misalignments with desired configurations and restore quickly to ensure an optimal state at all times.


6. Improved security strategies

Infrastructure-as-Code (IaC) offers an array of useful security features, and its one-way deployment feature stands out in particular. With IaC, networking services can be provisioned with code and deployed the same way using public or private clouds – meaning that even complex security standards may be easily created and distributed across a network infrastructure to dramatically reduce gatekeeper review time for any changes made. This is especially valuable when managing infrastructures requiring strict adherence to high levels of security; making continual passes far more efficient than ever before.


7. Accountability

Infrastructure as Code (IaC) delivers significant benefits to teams in terms of productivity and accountability. This is achieved through two key features: self-documentation and source control, plus their cumulative effect. These enable easy access to the configuration’s source code, ensuring changes can be seen clearly with explanations on why they were made – boosting collaboration among team members for improved output results.


8. Disaster recovery

Utilizing version control can prove immensely beneficial for companies, as it provides a powerful disaster recovery option. Regardless of your level of expertise or the tools at hand, things won’t always go according to plan – that’s where well-preserved version history comes in handy. In just seconds you’ll be able to undo any recent changes and avoid an altogether disastrous situation.


Why choose Infrastructure as Code?

Infrastructure as code has become increasingly important in recent times due to three major trends that are happening simultaneously.


#1 The transition to the cloud

Firstly, there is an ongoing shift toward the cloud across various industries. As more companies move away from on-premises infrastructure, cloud-based infrastructure continues to be provisioned via APIs. This allows for easy management with infrastructure as code tools which further improves the efficiency and speed of operations.


#2 Cloud modernization

Secondly, organizations that have migrated to the cloud are often looking to maximize the benefits of their cloud environment through cloud modernization practices. This usually entails adopting technologies such as serverless, containers, and Kubernetes. These technologies, when applied correctly, can help organizations to deliver value more quickly and efficiently. However, using these technologies typically requires a more granular approach to managing infrastructure. Infrastructure as code offers such a granular and detailed approach.


#3 Frequent infrastructure changes

Lastly, there has been a significant and rapid increase in the rate at which organizations are changing their infrastructure. Cloud adoption, cloud modernization, and the need for businesses to move faster and more efficiently are all factors that contribute to this. Managing tens of resources that change infrequently can still be done with point-and-click or traditional scripts. However, the reality for many teams today is that they are managing thousands or tens of thousands of resources that change frequently – even on an hourly basis. This is where infrastructure as code becomes an essential tool for businesses and teams to take control of this complexity.


Overall, it is evident that infrastructure as code has become more important in recent years. The trends towards cloud adoption, cloud modernization, and frequent infrastructure changes signify the need for more significant emphasis on infrastructure as code. By achieving more efficient, granular, and detailed management of infrastructure, organizations can move faster, deliver value quicker and take control of their growing complexity in a streamlined and efficient way.

Angelika Agapow
Angelika Agapow
Content Marketing Specialist
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