Comment 2 for bug 1840492

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Cory Johns (johnsca) wrote :

The admin credentials are required by ceph-csi to support CephFS volume provisioning. I believe this is the only reason we require the admin relation currently, though in the past it was needed for RBD as well and there are still some references to that in the charm code that need to be cleaned up.

https://github.com/ceph/ceph-csi/blob/master/docs/deploy-cephfs.md