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Update and Deploy New Version of Application

In this lab, we will make a change to the web application and then re-deploy the new container image into AKS.

Update web application code

  1. Use the editor of your choice and browse to ~/blackbelt-aks-hackfest/app/web/src/components/

  2. Edit code for the Footer.vue

  3. Find the snippet below (line 13) and change the text "Azure Global Blackbelt Team" to your name or whatever you would like to display.

    <div class="row at-row flex-center flex-middle">
  <div class="col-lg-6">
  </div>
  <div class="col-lg-12 credits">
    Azure Global Blackbelt Team
  </div>
  <div class="col-lg-6">
  </div>
</div>

  4. Save your edits and close the file

Create new container image and push to ACR

  1. Browse to ~/blackbelt-aks-hackfest/app/web

  2. You should still have a Dockerfile created in an earlier lab

  3. Create a new image with an updated image tag

    docker build -t rating-web:new-version .

  4. Tag the new image and push to your Azure Container Registry

    # you may need to login again to your ACR. set these values to yours
ACR_SERVER=
ACR_USER=
ACR_PWD=

docker login --username $ACR_USER --password $ACR_PWD $ACR_SERVER

docker tag rating-web:new-version $ACR_SERVER/azureworkshop/rating-web:new-version

docker push $ACR_SERVER/azureworkshop/rating-web:new-version

  5. Verify image was pushed to ACR by checking your registry in the Azure Portal

Update kubernetes deployment

There are two ways to update the application with the new version. Both are described below. Choose one to proceed.

  1. Edit the YAML file and re-apply
  2. Update the deployment and re-set the image tag

Edit YAML and apply

  1. As we did in a prior lab, open the helper-files directory and review the file heroes-web-api.yaml

  2. Update the yaml file and replace the tag from v1 to new-version

    spec:
containers:
- image: mycontainerregistry.azurecr.io/azureworkshop/rating-web:new-version
    name:  heroes-web-cntnr

  3. Apply the new yaml file

    cd ~/blackbelt-aks-hackfest/labs/helper-files

kubectl apply -f heroes-web-api.yaml

Update the deployment

  1. Set the new image tag on the deployment object 
    kubectl get deploy

NAME                DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
heroes-api-deploy   1         1         1            1           29m
heroes-db-deploy    1         1         1            1           32m
heroes-web-depoy    1         1         1            1           29m

kubectl set image deployment/heroes-web-deploy heroes-web-cntnr=$ACR_SERVER/azureworkshop/rating-web:new-version

Check status

  1. You can see the updates and history for the changes from above 
    # this command will verify that latest deployment was successful
kubectl rollout status deployment/heroes-web-deploy

# each deployment creates a new replicaset
kubectl get replicaset | grep web

heroes-web-556f6f976c          0         0         0         34m
heroes-web-64f4795689          0         0         0         8m
heroes-web-67b4b7b887          1         1         1         1m

kubectl rollout history deployment/heroes-web-deploy

Browse to your newly deployed web application