Variable as Namespace

[hikarukujo]

Maybe I'm missing something simple, but I cannot figure this out for the life of me. I'm trying to set the namespace to dev if the branch is not "master" and I have the branch detection working right now. But it looks like k8s-deploy will not take a variable as the namespace name. Maybe it's a syntax error I'm missing? Here is my yaml:

on:
  push:
    branches:
    - dev
    - master

name: CI/CD Workflow

jobs:
    build-and-deploy:
        runs-on: ubuntu-latest
        steps:
        # checkout the repo
        - name: 'Checkout GitHub Action'
          uses: actions/checkout@master
          
        - name: 'Login via Azure CLI'
          uses: azure/login@v1
          with:
            creds: ${{ secrets.AZURE_CREDENTIALS }}
        
        - name: 'Build and push image to ACR'
          uses: azure/docker-login@v1
          with:
            login-server: ${{ secrets.REGISTRY_LOGIN_SERVER }}
            username: ${{ secrets.REGISTRY_USERNAME }}
            password: ${{ secrets.REGISTRY_PASSWORD }}
        - run: |
            docker build . -t ${{ secrets.REGISTRY_LOGIN_SERVER }}/revio-calendar-backend:${{ github.sha }}
            docker push ${{ secrets.REGISTRY_LOGIN_SERVER }}/revio-calendar-backend:${{ github.sha }}

        - name: 'Set context for AKS'
          uses: Azure/aks-set-context@v1
          with:
            creds: ${{ secrets.AZURE_CREDENTIALS }}
            cluster-name: ${{ secrets.CLUSTER_NAME }}
            resource-group: ${{ secrets.RESOURCE_GROUP }}

        - name: 'Create AKS Secret'
          uses: Azure/k8s-create-secret@v1
          with:
            container-registry-url: ${{ secrets.REGISTRY_LOGIN_SERVER }}
            container-registry-username: ${{ secrets.REGISTRY_USERNAME }}
            container-registry-password: ${{ secrets.REGISTRY_PASSWORD }}
            secret-name: c1-k8s-secret

        - name: 'Set Dev Branch'
          env:
            NAMESPACE: dev
          run: echo "$NAMESPACE"
            
        - name: 'Set Master Branch'
          if: endsWith(github.ref, '/master')
          env:
            NAMESPACE: prod
          run: echo "$NAMESPACE"
    
        - name: 'Deploy to Kubernetes'
          uses: Azure/k8s-deploy@v1
          with:
            namespace: $NAMESPACE
            manifests: |
              manifests/deployment.yml
              manifests/service.yml
            images: |
              ${{ secrets.REGISTRY_LOGIN_SERVER }}/revio-calendar-backend:${{ github.sha }}
            imagepullsecrets: |
              c1-k8s-secret

I succeed on all steps but the last, which says it cannot find a namespace named "$NAMEPSACE":

Error from server (NotFound): error when creating "/tmp/Service_revio-calendar-backend_1592439878791": namespaces "$NAMESPACE" not found

Is there a way to use a variable to determine the namespace so I can avoid one yaml for master and one for other branches?

[thesattiraju]

You need to use namespace like ${{ env.NAMESPACE }} instead of $NAMESPACE. Given that the environment variable is not available in that context, it failed because of that.

When you use it like ${{ env.NAMESPACE }} this value gets replaced with the actual value of the variable and passed to the action.

[hikarukujo]

That didn't do the trick, it seems to ignore when I do that:

/usr/bin/kubectl apply -f /tmp/Deployment_revio-calendar-frontend_1592492995710,/tmp/Service_revio-calendar-frontend_1592492995710,/tmp/Ingress_revio-calendar-frontend-ingress_1592492995710 --namespace default
deployment.extensions/revio-calendar-frontend created
error: the namespace from the provided object "dev" does not match the namespace "default". You must pass '--namespace=dev' to perform this operation.
service/revio-calendar-frontend created
##[error]Error: error: the namespace from the provided object "dev" does not match the namespace "default". You must pass '--namespace=dev' to perform this operation.

This was with the following config:

    - name: 'Deploy to Kubernetes'
          uses: Azure/k8s-deploy@v1
          with:
            namespace: ${{ env.NAMESPACE }}
            manifests: |
              manifests/deployment.yml
              manifests/service.yml
              manifests/ingress-dev.yml
            images: |
              ${{ secrets.REGISTRY_LOGIN_SERVER }}/revio-calendar-frontend:${{ github.sha }}
            imagepullsecrets: |
              c1-k8s-secret
              - uses: actions/checkout@v2

[thesattiraju]

You have to declare that environment globally. I suppose that value is not added to the env context because of where you're declaring it.

Consider adding an environment section at the workflow level. Something like this: https://github.com/Azure/actions-workflow-samples/blob/master/Kubernetes/build-and-deploy-docker-image-aks-using-manifests.yml#L15

Documentation: https://help.github.com/en/actions/configuring-and-managing-workflows/using-environment-variables