Introduce mount security mode for basic multi tenancy
Fixes#2164.
This adds three new parameters/options to StorageClass/flexvolume entry:
* `mountUser`
* `mountSecret`
* `mountSecretNamespace`
Signed-off-by: Alexander Trost <galexrt@googlemail.com>
We don't use volume manager argument in NewClusterController()
and NewFlexvolumeServer() functions, so remove the unused volume
manager parameter from those functions.
Signed-off-by: Dennis Chen <dennis.chen@arm.com>
Current Ceph volume manager code doesn't take the builtin
kernel module into the account, so the `modinfo` will fail
in this case. Also, we need to add error handling code to
make sure the volume manager does work when proceeding to
continue, otherwise we will encounter the `rbd` related issue
in the following step even we have an artificial `agent` pod
in running state.
Signed-off-by: Dennis Chen <dennis.chen@arm.com>