An illustration of a service as a platform is Azure Cloud Services (PaaS). This technology, like Azure App Service, is intended to provide scalable, dependable, and cost-effective apps. Azure Cloud Services and App Service are both housed on virtual machines (VMs), just like each other. The VMs, however, are more under your control. On virtual machines (VMs) that make use of Azure Cloud Services, you can deploy your own applications and have remote access to them.
Less simplicity of use translates into more control. In general, the Web Apps component of App Service makes it quicker and simpler to launch a web application than Azure Cloud Services, unless you actually require the extra control features.
Azure Cloud Services jobs come in two different varieties. The way your role is housed on the VMs is the only distinction between the two:
Web role: Uses IIS to automatically deploy and host your application.
Worker role: Runs your software independently without using IIS.
For instance, a straightforward application might only use one web role to provide a webpage. In a more complicated application, user requests might first be handled by a web role before being forwarded to a workers role to process. (Azure Queue storage or Azure Service Bus might be used for this communication.)
All of the VMs in a standalone executable run within the same cloud service, as the previous figure illustrates. The programme is accessed by users via a single public IP address, and requests are automatically distributed across its virtual machines (VMs). The technology avoids a single point of equipment failures while scaling and deploying the VMs in a Microsoft Cloud Services application.
Although apps run in virtual machines (VMs), it’s crucial to realise that Azure Cloud Services offers PaaS rather than infrastructure as a service (IaaS). Here is one method to approach things. You first establish and customize the infrastructure your application operates in with IaaS, including such Azure Virtual Machines. After that, you introduce your program into this setting. You are in charge of administering a large portion of this environment by performing tasks like installing updated operating system patches in each virtual machine. In contrast, PaaS makes it seem as though the ecosystem already exists. All that is required of you is application deployment. It runs on a platform that is managed for you, including the rollout of new operating system versions.
