[AKS][aks-preview] az aks nodepool upgrade: Add new parameter --aks-custom-headers

[mainred]

---

This checklist is used to make sure that common guidelines for a pull request are followed.

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally?

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

About Extension Publish

There is a pipeline to automatically build, upload and publish extension wheels.
Once your PR is merged into master branch, a new PR will be created to update src/index.json automatically.
The precondition is to put your code inside this repo and upgrade the version in the PR but do not modify src/index.json.

set the env and add new test

• setup the local environment following:
  azdev setup --cli /home/azureuser/go/src/github.com/Azure/azure-cli --repo /home/azureuser/go/src/github.com/Azure/azure-cli-extensions

reference: https://github.com/Azure/azure-cli-dev-tools#style-linter-check-and-testing

• created generated recording files as it's not necessary to run the newly added test by talking to Azure.

azdev test aks-preview

test with the self-built aks-preview

• build and publish the extention

azdev extension publish aks-preview --storage-account $STORAGEACCOUNT --storage-subscription $STORAGESUB --storage-container azure-cli-extension --update-index

• add extension

az extension add --source $python-wheel-blob-url

• run aks-preview with newly added extension

az aks nodepool upgrade --resource-group $rg --cluster-name k8s --name dr2 --kubernetes-version 1.21.1 --aks-custom-headers WindowsContainerRuntime=containerd --debug

returns successfully and the header value can ben seen below:

cli.azure.cli.core.sdk.policies: Request headers:
cli.azure.cli.core.sdk.policies:     'x-ms-client-request-id': 'b7eaadd7-e556-11eb-9394-000d3ac57d3d'
cli.azure.cli.core.sdk.policies:     'CommandName': 'aks nodepool upgrade'
cli.azure.cli.core.sdk.policies:     'ParameterSetName': '--resource-group --cluster-name --name --kubernetes-version --aks-custom-headers --debug'
cli.azure.cli.core.sdk.policies:     'WindowsContainerRuntime': 'containerd'

[yonzhan]

aks

[mainred]

This is to support upgrading Windows nodepools from docker to containerd during the Windows containerd public preview.

cc @keikhara @AbelHu @palma21

[mainred]

@zhoxing-ms , could you please take a look? Thanks.

[zhoxing-ms]

@mainred Could you add some test cases for this new parameter?

[FumingZhang]

need to add a space to separate options