Infrastructure management can be very painful as your business start to grow. You might end up paying a lot of management, deployment as well as installation and upgrade of your infrastructure.
Similarly it is hard to implement dynamic scaleup and scale down during peak load as well as in case of some disaster, recovery can be painful to go back to the last working state. Infrastrucure as Code can help you fix all these issues.
You can deploy your infrastructure using CI/CD(Continious Integration and Continious Deployment), with this chances of human error is ruled out so you are going to get same infrastructure even you deploy 100 times.
You can use tools like Ansible & Puppet which are native to operating system which can execute tasks faster than usual. for example- deploying SQL Server Database manually can take upto one hour but same installation can finish in minutes if you use Puppet or Ansible for deployment.
With IAC, you can scale up and scale down your VMs at any time, for example if you use kubernetes or Openshift, you can use IAC via cloud config in AWS or Ansible Tower to scale on demand based on the condition mentioned in code for example: Scale another VM when CPU is more than 90%.
As we mentioned in above case, you can scale up and scale down on demand based on code automatically, this can help to save a lot of money for you for example- if at night when your website is not used that much, you can scale down some resources based on CPU usage, similarly you can scale up as soon as CPU goes high. This can help you save a lot of money in clouds like AWS, Azure and GCP.
Simply NO! There are a lot of tools which can help you deploy create IAC. All these tools are OpenSource and supported by big companies like Ansible is brought by Redhat and is also Terraform is supported by Hasicorp. Some of the examples of such tools is as below:
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