Until recently the organizations are suffering from lack of coordination between Development teams & IT Operations specially at the time of deployments. I witness this since my career started back in 2000. The term DevOps means for most organizations improving communications between development and deployment & maintenance teams thus increasing overall productivity, sustainability & availability.
Consider you developed a business critical application and after several tests on pre-production you handed over this to deployment team but it fails at first attempt. Later deployment team adjusted the configuration based on Production environment without informing you and deployed the application successfully. After 3 months when you release a update, once again it fails to install and break the application in production environment. This is/was the story of almost all organizations but thanks to Cloud technology and Azure Stack that can help you to adopt practices that enable DevOps.
Infrastructure as a Code (IaC) is utilized when deploying software in a Cloud using Self Services. By using Azure Resource Manager (ARM) templates in Azure Stack, you define reusable deployment configurations that you can use to quickly deploy application infrastructure with a predictable method that works every time. This is known as idempotent. The integration between ARM Templates and Desired State Configuration (DSC) enables you to also ensure the application is configured correctly when it is being deployed.
Developing applications for Azure or AzureStack allow developers to write application & infrastructure code at the same time & stored in same repository. With this approach application can run on any environment (Azure or AzureStack). Some benefits can be realized immediately but not limited to:
1. Infrastructure required for the application is defined as code (IaC), which implies fewer errors.
2. Deployment times are faster providing end users with more value from their applications.
3. Requirements can be defined for on-premises, off-premises, or both.
See how @AteaNorge is helping @Komplettno with consistent hybrid cloud: @Azure and #AzureStack : https://www.youtube.com/watch?v=DdLzafea5NY&feature=youtu.be