There are existing patterns for converting UNIX variants to Azure. The main decision you will need to make is what type of target architecture you want on Azure. This will often be determined by how you want to maintain the application moving forward. If you want to keep this pretty much the same in the Azure version, then an emulation option (if available) or recompilation to VMs might be the right way to go. If you want to have a more cloud-native solution, then using PaaS services should be investigated as an option. Finally, if you are moving an ISV application from UNIX to Azure, you need to move forward with the vendor-recommended solution.
We’ve looked at moving from various types of legacy environments in the first four chapters, including this one on UNIX. We will now look at Azure services that enterprise applications can use in the next two chapters.