Variable for kubernetesServiceEndpoint in Kubectl task can handle only Global Variables

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Question, Bug, or Feature?
Type: Bug

Enter Task Name: Kubectl task

list here (V# not needed):
https://github.com/Microsoft/azure-pipelines-tasks/tree/master/Tasks

Environment

• Server - Azure Pipelines
• Agent - Private:

Issue Description

Variable for kubernetesServiceEndpoint in Kubectl task can handle only Global Variables and Stage Variable are not recognized

When using kubectl task and login command the kubernetesServiceEndpoint accepts only the Global Variable When setting the variable inside stage the kubectl task login complains it can’t find the resource. Service endpoint is private and security is set to all pipelines

when echoing the variable is reflected KubeTest

this is how variable is set.

  displayName: Deploy to Test
  variables:
  - name: k8sNamespace
    value: wso2is
  - name: k8sReleaseName
    value: test
  - name: k8sService
    value: KubeTest
  - group: test-wso2is
  jobs:

this is how is used:

- task: Kubernetes@1
  displayName: Login to Kubernetes
  inputs:
    connectionType: Kubernetes Service Connection
    kubernetesServiceEndpoint: $(k8sService)
    command: login

Task logs

N/A

Troubleshooting

When setting the variable in the global variables, deployment stage accept it and can work with variable. When hardcoding the Kubernetes endpoint also everything works fine.

Error logs

Error message appears even before any stage starts.

There was a resource authorization issue: "The pipeline is not valid. Job DeployTest: Step input kubernetesServiceEndpoint references service connection $(k8sService) which could not be found. The service connection does not exist or has not been authorized for use. For authorization details, refer to https://aka.ms/yamlauthz."```

[harlandgomez]

I saw this somewhere which works for me: {{ variables.k8sService }} instead of $(k8sService)

[iasha102]

I had more days to test everything. And come to this: If I declare the variable in the global section and then redeclare it in the staging section, then everything works fine. And this does not happen with other variables.