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Deploy API Management API's through an Azure DevOps Pipeline

This is a sample implementation of a Azure DevOps pipeline deployment for Azure API Management API's.

This repo continues on the work done in the Azure API Management DevOps Resource Kit repo. Specifically, this repo focusses on the deploying the extracted API's in a repeatable way through an Azure DevOps Pipeline.

The challenges

Once the API(s) have been extracted from API Management, you have a nice collection of ARM templates which can be maintained through a DevOps process and deployed to various API Management instances.

When asked by customers about how to manage the API's within API Management in a DevOps process they are facing some or all of the following challenges:

  • ARM Templates for most people are not the first choice when it comes to Azure resource deployments, resulting in the creation of many custom scripts which are, most often, not reusable.
  • Policies embedded in ARM are impossible to maintain, extracting the policies to linked XML Files require a storage account during ARM deployments.
  • One repo per API or one for many is often a question not easily answered. Most of the concerns and objections for each are around security, control, deployment duration, deployment of API's not changed etc.
  • Manage API's at Scale and you'll find that custom scripts and pipelines are impossible to manage and maintain.

A Principled Approach

I am not pretending this is THE solution or THE recommended way of doing things. This repo only offers an approach based on some principles I use when discussing software development in general and in this case deployment of API's in a DevOps process.

No, these are not all the principles you can or should apply, these are just the ones I used to create something you can use in your day-to-day operation.

  • KISS, Keep It Stupidly Simple is one of my favorits. The approach should be simple enough to understand, deploy, maintain, improve and expand upon.
  • Common Practices without the use of hacks.
  • Configuration over Scripting to get going with the approach.
  • Leverage the Resource Kit as a consistent method for generating structured ARM Templates ready for redeployment.
  • External Policy Files to allow for maintenance and development outside of the ARM templates.
  • Deploy ARM Templates from the Resource Kit Extractor tool without any changes.

Parts of the Solution

The solution consists of three main parts:

  • The Resource Kit Extractor tool, which is not really part of this solution but this solution is based on how the tool extracts an API and the ARM Templates it generates.
  • An Azure DevOps Pipeline sample structure has been created which allows for individual and mass deployment of the API's present within a repo. The sample pipeline structure also introduces a bit of modularity and parametarization to support the need to only change configuration rather that change structures.
  • A PowerShell Deployment Task to deploy the ARM Templates making up the API within API Management. This PowerShell script takes care of copying linked files to a Blob Storage account and deploys the ARM Templates.

Known Limitations

As this approach is a work in progress the limitations are mostly within the current capabilites of the PowerShell deployment task recognizing the settings used during API extraction using the Extractor tool.

License

This project is licensed under the MIT License.

Contributing

This project welcomes contributions and suggestions.

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