Virtual machines are still the most common way to build and deploy applications via CI/CD. This session explores a new approach: KEDA, a cloud-native autoscaler that will drive the on-demand scaling of containerized build agents running on Azure Container Apps. By leveraging both technologies, we can build highly scalable, cost-efficient and sustainable CI/CD pipelines.

• Click here to view the meetup details

• Find the slides here

• Dockerfile for GitHub-runners is located here
• Dockerfile for Azure DevOps is located here

• Install Terraform or OpenTofu
• Inject your GitHub PAT as Terraform variable gh_token
• Update the following variables in vars.tf to match your needs:
  • repo_owner
  • repo_scope
  • repo_name_app
  • repo_name_job
  • image_tag
• Adopt the following locals in main.tf to match your needs:
  • prefix
  • location
  • runnerImage

• Initialize your GitHub repo by adding the Workflows release.yaml & docker-build.yaml to the path .github/workflows/
• Commit & push Dockerfile and entrypoint.sh to your repo and let the workflow build & release the image

• Run Terraform locally or via worklfow to create needed resources

# Initialize Terraform
terraform init
# Run Teerraform plan to see what will be created
terraform plan
# Execute Terraform apply to create resources
terraform apply -auto-approve

• Add this demo workflow to your repo and run the workflow:

name: Octo Organization CI

on:
  workflow_dispatch:
  push:
    branches: [ main ]

jobs:
  build:
    runs-on: [self-hosted]

    steps:
      - uses: actions/checkout@v4

      - name: Display summary
        run: |
          echo "### Next-Gen CICD! :rocket:" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "Hello from Container App" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "- $HOSTNAME" >> $GITHUB_STEP_SUMMARY

# App Env
az containerapp env logs show \
  --name gh-runner-env-app \
  --resource-group gh-runner-rg \
  | jq

# Job Env
az containerapp env logs show \
  --name gh-runner-env-job \
  --resource-group gh-runner-rg \
  | jq

az containerapp logs show \
  --name gh-runner-app \
  --resource-group gh-runner-rg \
  --type system \
  | jq


az containerapp logs show \
  --name gh-runner-app \
  --resource-group gh-runner-rg \
  --type console \
  | jq

# KEDA logs
ContainerAppSystemLogs_CL
| where EventSource_s == "KEDA"
| project TimeGenerated, EventSource_s ,Reason_s, Log_s, JobName_s, EnvironmentName_s
| order by TimeGenerated asc


# KEDA logs
ContainerAppSystemLogs_CL
| where EventSource_s == "ContainerAppController"
| project TimeGenerated, EventSource_s ,Reason_s, Log_s, JobName_s, EnvironmentName_s
| order by TimeGenerated asc

• GitHub - Autoscaling with self-hosted runners
• Tutorial: Deploy self-hosted CI/CD runners and agents with Azure Container Apps jobs
• Keda GitHub runner scaler
• Docker Github Actions Runner