Check if R is running in an Azure VM
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An optional string to use as a nonce.
These functions check if R is running in an Azure VM by attempting to contact the instance metadata host.
in_azure_vm simply returns TRUE or FALSE based on whether it succeeds.
get_vm_cert provides a stronger check, by retrieving the VM's certificate and throwing an error if this is not found. Note that you should still verify the certificate's authenticity before relying on it.
in_azure_vm, a boolean. For
get_vm_cert, a PKCS-7 certificate object.
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