We are in the process of migrating from CentOS6 to CentOS7. What we would like to do is use node features to allow our users to select which version of CentOS their jobs require. Have we selected the best way to achieve this functionality? What I worry about is users not supplying a constraint causing some of their jobs to fail because they ran on the wrong version of CentOS. Is there a way to filter job submissions so that a default constraint could be added if one was not supplied by the user? Any thoughts or wisdom is appreciated. Thank you for your time.
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