#35 Compatibility with oVirt/RHEV

[Paul Fx]

Hi Bart,

We have been working well with SCST connected to Oracle VM XEN environment for a number of months now, unfortunately we are unable to connect our oVirt/RHEV environment, yet our HP P2000 G3 & IBM v7000 G1 has no issues connect to oVirt/RHEV enironment.

Do you think this is an oVirt driver issue or SCST not supplying a compatibale config to oVirt?

Cheers

[Bart Van Assche]

Please provide more information. Is SCST running inside an oVirt virtual
machine? Are you using the iSCSI protocol? If so, has it been verified
with Wireshark or tcpdump that this really is oVirt related and that
this is not caused by e.g. firewall configuration?

[Paul Fx]

Hi Bart,

Sorry for delay replying, just trying to drill in deeper to the issue.

oVirt version 3.4.8
SCST version 3.3.x
Redhat 7.5
FC connections only.

lsmod | grep qla
qla2x00tgt 81582 0
scst 2399203 2 qla2x00tgt,scst_vdisk
qla2xxx_scst 442687 1 qla2x00tgt
scsi_transport_fc 64007 1 qla2xxx_scst

lsmod | grep scst
scst_vdisk 109407 0
scst 2399203 2 qla2x00tgt,scst_vdisk
dlm 169891 1 scst
libcrc32c 12644 4 xfs,nf_nat,scst_vdisk,nf_conntrack
crc_t10dif 12912 2 scst,sd_mod
qla2xxx_scst 442687 1 qla2x00tgt
scsi_transport_fc 64007 1 qla2xxx_scst

HANDLER vdisk_blockio {
DEVICE lun0 {
filename /dev/zvol/apsan2p1/zvol1
nv_cache 1
}
DEVICE lun1 {
filename /dev/zvol/apsan2p2/zvol1
nv_cache 1
}
}

TARGET_DRIVER qla2x00t {
TARGET 21:01:00:1b:32:bd:cf:8d {
enabled 1
GROUP ovs {
LUN 0 lun0
LUN 1 lun1
INITIATOR 21:00:00:24:ff:88:94:e9
INITIATOR 21:00:00:24:ff:2f:aa:6b
}
}

TARGET 21:01:00:1b:32:bd:2a:8c {
    enabled 1
    GROUP ovs {
            LUN 0 lun0
             LUN 1 lun1
            INITIATOR 21:00:00:24:ff:88:94:e8
            INITIATOR 21:00:00:24:ff:2f:aa:6a
    }
}

}

We rebuilt 2 x Redhat 7.5 and 2 x oVirt 3.4.8 hosts, the issue seems to be trying to connect 2 independent head units to same oVirt farm via SCST, the host are getting confused with lun id's, no matter what we do within scst.conf's there is no joy having multiple SCST supplied FC SAN connections to single oVirt Farm, were as this wasn't an issue with Oracle VM Manager (xen based). As we notice within oVirt that lun's were showing 4 paths each instead of 2.

Am I doing the wrong setup?
We tried changing 2nd units to lun3 & lun4 but this didn't work...
Is there a possible solution?

Cheers