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Description of problem: Python-hardware uses these two packages which are not part of RHEL 8 beta.
Sysbench was not in RHEL (my error) - I've rebuilt that.
Looking at the python-hardware code, sdparm is used directly by hardware/detect.py to obtain WCE (write cache enabled) and RCD (read cache disabled). We can change out the call to check WCE by reading /sys/block/%s/queue/write_cache. If it is "write back", then WCE = 1. If it is "write through", then WCE = 0. I am still investigating how to determine RCD, although it may not be possible (and we may have to simply set this to 0 at all times).
I suspect RCD isn't even needed.
https://github.com/redhat-cip/hardware/pull/49
RHEL8 tests on VM : Failed retrieving disk information device/model for vdf: [Errno 20] Not a directory: '/sys/block/vdf/device/device/model' Failed retrieving disk information device/revision for vdf: [Errno 20] Not a directory: '/sys/block/vdf/device/device/revision' Failed at getting disk information at /sys/block/vdf/device/scsi_disk/virtio9/cache_type: [Errno 2] No such file or directory: '/sys/block/vdf/device/scsi_disk/virtio9/cache_type' Although the code no longer pulls in the sdparm dependency, and it works on baremetal, it does not use correct pathing on VMs to find the relevant data. Furthermore, VMDK does not have "model" : : lrwxrwxrwx. 1 root root 0 Jul 9 21:40 /sys/block/dm-4 -> ../devices/virtual/block/dm-4 : : lrwxrwxrwx. 1 root root 0 Jul 9 21:10 /sys/block/vdf -> ../devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf ls -ld /sys/block/vdf/* -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/alignment_offset lrwxrwxrwx. 1 root root 0 Jul 9 21:10 /sys/block/vdf/bdi -> ../../../../../virtual/bdi/252:80 -rw-r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/cache_type -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/capability -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/dev lrwxrwxrwx. 1 root root 0 Jul 9 21:10 /sys/block/vdf/device -> ../../../virtio9 -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/discard_alignment -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/ext_range -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/hidden drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/block/vdf/holders -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/inflight drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/block/vdf/integrity drwxr-xr-x. 3 root root 0 Jul 9 21:10 /sys/block/vdf/mq drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/block/vdf/power drwxr-xr-x. 3 root root 0 Jul 9 21:10 /sys/block/vdf/queue -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/range -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/removable -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/ro -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/serial -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/size drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/block/vdf/slaves -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/block/vdf/stat lrwxrwxrwx. 1 root root 0 Jul 9 21:10 /sys/block/vdf/subsystem -> ../../../../../../class/block drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/block/vdf/trace -rw-r--r--. 1 root root 4096 Jul 9 21:40 /sys/block/vdf/uevent ls -ld /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/* -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/alignment_offset lrwxrwxrwx. 1 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/bdi -> ../../../../../virtual/bdi/252:80 -rw-r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/cache_type -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/capability -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/dev lrwxrwxrwx. 1 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/device -> ../../../virtio9 -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/discard_alignment -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/ext_range -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/hidden drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/holders -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/inflight drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/integrity drwxr-xr-x. 3 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/mq drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/power drwxr-xr-x. 3 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/queue -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/range -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/removable -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/ro -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/serial -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/size drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/slaves -r--r--r--. 1 root root 4096 Jul 11 15:41 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/stat lrwxrwxrwx. 1 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/subsystem -> ../../../../../../class/block drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/trace -rw-r--r--. 1 root root 4096 Jul 9 21:40 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block/vdf/uevent ls -ld /sys/devices/pci0000:00/0000:00:0d.0/virtio9/* drwxr-xr-x. 3 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/block -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/device lrwxrwxrwx. 1 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/driver -> ../../../../bus/virtio/drivers/virtio_blk -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/features -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/modalias drwxr-xr-x. 2 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/power -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/status lrwxrwxrwx. 1 root root 0 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/subsystem -> ../../../../bus/virtio -rw-r--r--. 1 root root 4096 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/uevent -r--r--r--. 1 root root 4096 Jul 9 21:10 /sys/devices/pci0000:00/0000:00:0d.0/virtio9/vendor
Alistair, as this has fixed the original problem in the bug - the sdparm dependency, I believe we should close this one and open a separate bug for the VM issue that you found as they're not related.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2019:2811
(In reply to Bob Fournier from comment #11) > Alistair, as this has fixed the original problem in the bug - the sdparm > dependency, I believe we should close this one and open a separate bug for > the VM issue that you found as they're not related. Hello, has anyone created a ticket for the VM issue. I have the same issue as described by @atonner@redhat.com