azurerm_function_app_host_keys: Retry when reading function key #10894
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This looks to address the issue seen in #9854 and #9869.
Specifically there is a race condition between the function app being created and the keys being available to read. This appears more in premium funcs on vnets than on normal functions.
This PR adds retry to the request to get keys, this should resolve the issue. I tested this approach with the following script to validate it, see blog here
Integration tests passing