mantle/kola/tests: adapt mpath verification

[jcapiitao]

The test needs to be adapted so it doesn't verify that we're on multipath based on whether the device is /dev/mapper/mpath or not, but instead based on udevadm output.

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ci/prow/rhcos	a010061	link	true	/test rhcos

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[dustymabe]

Running the multipath.partition test locally I don't see how this update will work:

[core@qemu0 ~]$ findmnt -nvr /var/lib/containers -o SOURCE
/dev/mapper/mpatha
[core@qemu0 ~]$ udevadm info /dev/mapper/mpatha | cat
P: /devices/virtual/block/dm-0
M: dm-0
R: 0
J: b252:0
U: block
T: disk
D: b 252:0
N: dm-0
L: 50
S: disk/by-uuid/dm-mpath-a4da5870-d6c8-4c02-b420-2f9f14d2bd9f
S: disk/by-label/dm-mpath-containers
S: disk/by-id/dm-name-mpatha
S: disk/by-label/containers
S: disk/by-id/scsi-0xd5f7e2fb9beb72d6
S: disk/by-diskseq/4
S: disk/by-id/wwn-0xxd5f7e2fb9beb72d6
S: disk/by-uuid/a4da5870-d6c8-4c02-b420-2f9f14d2bd9f
S: mapper/mpatha
S: disk/by-id/dm-uuid-mpath-0xd5f7e2fb9beb72d6
Q: 4
E: DEVPATH=/devices/virtual/block/dm-0
E: DEVNAME=/dev/dm-0
E: DEVTYPE=disk
E: DISKSEQ=4
E: MAJOR=252
E: MINOR=0
E: SUBSYSTEM=block
E: USEC_INITIALIZED=9164907
E: DM_UDEV_DISABLE_LIBRARY_FALLBACK_FLAG=1
E: DM_UDEV_PRIMARY_SOURCE_FLAG=1
E: DM_UDEV_RULES_VSN=3
E: DM_NAME=mpatha
E: DM_UUID=mpath-0xd5f7e2fb9beb72d6
E: MPATH_DEVICE_READY=1
E: DM_TYPE=scsi
E: DM_WWN=0xxd5f7e2fb9beb72d6
E: DM_SERIAL=0xd5f7e2fb9beb72d6
E: ID_FS_LABEL=containers
E: ID_FS_LABEL_ENC=containers
E: ID_FS_UUID=a4da5870-d6c8-4c02-b420-2f9f14d2bd9f
E: ID_FS_UUID_ENC=a4da5870-d6c8-4c02-b420-2f9f14d2bd9f
E: ID_FS_SIZE=1006632960
E: ID_FS_LASTBLOCK=262144
E: ID_FS_BLOCKSIZE=4096
E: ID_FS_TYPE=xfs
E: ID_FS_USAGE=filesystem
E: NVME_HOST_IFACE=none
E: DEVLINKS=/dev/disk/by-uuid/dm-mpath-a4da5870-d6c8-4c02-b420-2f9f14d2bd9f /dev/disk/by-label/dm-mpath-containers /dev/disk/by-id/dm-name-mpatha /dev/disk/by-label/containers /dev/disk/by-id/scsi-0xd5f7e2fb9beb72d6 /dev/disk/by-diskseq/4 /dev/disk/by-id/wwn-0xxd5f7e2fb9beb72d6 /dev/disk/by-uuid/a4da5870-d6c8-4c02-b420-2f9f14d2bd9f /dev/mapper/mpatha /dev/disk/by-id/dm-uuid-mpath-0xd5f7e2fb9beb72d6
E: TAGS=:systemd:
E: CURRENT_TAGS=:systemd:

There's no DM_MPATH string in there.

[dustymabe]

@jlebon in the var lib containers mpath test we have:

coreos-assembler/mantle/kola/tests/misc/multipath.go

Line 54 in 6ec2120

ExecStart=/usr/sbin/mpathconf --enable

and then use mpatha throughout that particular test. Should we be specifying userfriendlynames=no there and not using mpatha?