azure-container-apps VS docker-github-runner-linux

Azure Container Apps might be able to do this when sticky sessions enter public preview. Logic Apps is also a more flexible option - not sure what its timeouts/performance are like though

Scaling and deployments can now be done without any downtime when using health checks: https://github.com/microsoft/azure-container-apps/issues/497

But looks like it really is not supported right now - https://github.com/microsoft/azure-container-apps/issues/227

Issue 1: Azure Container Apps doesn't fully yet allow us to use the Container Apps system assigned managed identity to pull images from Azure Container Registry. This means that we have to enable the ACRs Admin Account in order to provision images from the Azure Container Registry. You can follow this GitHub issue regarding this bug.

There is similar question asked on GitHub and it has been marked as a "Feature request" - https://github.com/microsoft/azure-container-apps/issues/129

GitHub: https://github.com/microsoft/azure-container-apps

Before we kick this off, it's REALLY IMPORTANT to note that Container Apps is currently in preview! That means what I publish in my present might/will change in your future! One example of this is that the namespace that Container Apps currently reside in will be changing in March 2022, as referenced in this GitHub issue (Note to self, update this article!)

Container Apps seem to become a valid hosting option for our scenario and our requirements once BYO/bring-your-own virtual network feature is available.

We will actually be using a very similar approach for the docker image configuration based on one of my previous blog posts, 'Create a Docker based Self Hosted GitHub runner Linux container'. So do check out that post also if you wanted more info on how self hosted GitHub runner containers work.

You can use the following example workflow: kedaScaleTest.yml

For this step I will use a PowerShell script, Prepare-RBAC-ACI.ps1 running Azure-CLI, to create a Resource Group and grant access to our GitHub Service Principal App we created in the previous post.

I hope you have enjoyed this post and have learned something new. You can find the code samples used in this blog post on my GitHub project: docker-github-runner-windows or docker-github-runner-linux. ❤️

Open VSCode, you can clone the repo found on my GitHub project docker-github-runner-linux which contains all the files or simply follow along with the following steps. We will prepare a script that will be needed as part of our docker image creation.