Docker is presenting the following or similar error:
Usage of loopback devices is strongly discouraged for production use. Either use `--storage-opt dm.thinpooldev` or use `--storage-opt dm.no_warn_on_loop_devices=true` to suppress this warning.
Docker is currently using loopback storage and direct LVM storage is desired instead.
- Red Hat Enterprise Linux 7
- Docker 1.6.2 and later
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