Update on azure devops

20.-Azure-Devops-pipelines.md

@@ -32,6 +32,24 @@ We have an Azure Devops Release pipeline per microservice. Source artifact for t
 
 All releases pipelines are very similar, as we use Helm to deploy to Kubernetes:
 
+![Release tasks](./img/azure-devops/release-tasks.png)
 
+We use three Azure Devops Tasks:
 
+* A Helm task to install Helm in the build agent
+* A Helm task to perform the `helm init`
+* A Helm task to perform the `helm upgrade`
 
+The helm upgrade task **uses the chart files which are produced as a build output** to install the helm chart from disk
+
+![Helm upgrade task](./img/azure-devops/helm-upgrade-task.png)
+
+Following arguments are passed to the task:
+
+* Namespace where to install the release
+* Chart Type as "File Path" as we are using the yaml files
+* Chart Path: Path with the chart files (part of build output)
+* Release Name: Name of the release to upgrade
+* Set Values: The values to set to the chart. We have to pass the `inf.k8s.dns`and the image name and tag
+* Mark the checkboxes: Install if not present, recreate pods and Wait
+* Arguments: Additional yaml files needed