feat: use the Azure CLI as an auth method

[bacongobbler]

Signed-off-by: Matthew Fisher matt.fisher@microsoft.com

Reason for Change: This PR allows a user to authenticate using the Azure CLI 2.0 for development purposes. Marking this as a WIP as I haven't manually ran through with this; just experimenting with alternative auth methods.

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

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[bacongobbler]

I've gone through and manually tested this so I believe it's ready for review (once I rebase this).

To test, run az login, then interact with aks-engine as usual. No service principal is required for authentication, but you'll still need to create one for the cluster itself:

$ az login
$ az group create -n $RG_NAME -l $LOCATION
$ az ad sp create-for-rbac --role="Contributor" --scopes="/subscriptions/$SUBID/resourceGroups/$RG_NAME"
$ aks-engine deploy --auth-method cli ...

[CecileRobertMichon]

unit tests failed validate-dependencies

[bacongobbler]

d'oh. Thanks for catching that. Will fix

[CecileRobertMichon]

codecov is blocked because of our codecov breakage yesterday, if you rebase the PR it should run.

Is this ready for review?

[bacongobbler]

yes! I will go and rebase this now. Thanks for the heads up.

[bacongobbler]

to clarify: yes, this is ready for review.

[codecov]

Codecov Report

Merging #238 into master will decrease coverage by 0.05%.
The diff coverage is 48.48%.

@@            Coverage Diff             @@
##           master     #238      +/-   ##
==========================================
- Coverage   53.25%   53.19%   -0.06%     
==========================================
  Files          95       95              
  Lines       14246    14257      +11     
==========================================
- Hits         7586     7584       -2     
- Misses       5995     6008      +13     
  Partials      665      665

[CecileRobertMichon]

lgtm