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A. Appendix
A.1. The stack user
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The Creating a Director Installation User section instructs readers to create a user named stack, which in turn will be used to deploy the Overcloud. You can use the stack account to run commands that require elevated privileges, such as deploying the back end (]) or loading the necessary environment variables for accessing the Overcloud (xref:test[).
Presumably, if you followed the instructions in Director Installation and Usage, the stack user would already exist. As such, it would be convenient to use it as needed.
The environment file in xref:envfile will configure the Block Storage service to use two NetApp back ends. The following snippet displays the relevant settings:
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