Add kudu warm up logic #497
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A kudu container can be run on a particular instance before the deployment so that it prevents deployment time out issues.
Algorithm
Get all app service instances using arm api.
Sort them
Get the first instance and call warm up api on this.
And set up the cookies.
Now all further calls will be going on this instance in further deployments also.
Exception: If publish profile is being used as a credential then arm call can not be made.
So we have to make warm up call and that will land on a random instance.
After that cookies will be set and further calls will land on the same instance.
But for further deployments this will be repeated so less optimized than spn case.
SPN
https://github.com/kumaraksh1/msdocs-python-flask-webapp-quickstart/actions/runs/21391031834/job/61591086242
Publish Profile
https://github.com/kumaraksh1/msdocs-python-flask-webapp-quickstart/actions/runs/21392678109/job/61590074943
Tests
