Azure app service deploy to multiple instances with auto scaling

user_14756192 0
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I've been trying to figure out the following: Do I need to disable auto scaling during a deploy when I'm using slots?

My Azure setup is:

  • One production site with auto scaling enabled
  • One staging slot
  • DevOps release going to the staging slot, which is then swapped with production

My thoughts are: what if the production site has spawned 3 instances, and I then start to release (to the 3 staging slot instances), but during this process, a scale out or in occurs, either adding or removing an instance. Would my release break in the middle or be rolled back?

azure-web-app-service azure deployment
1 Answers

As the official doc suggests scale settings is not swapped. The staging slot you have would be independent than production slot. And swap during scale in/out would not break the release. It will wait and adapt appropriately for the target slot to the scale need as per the scale rule and resource demand seamlessly.

user_137919530
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