I eventually figured out that shared targets was the problem. I'm now using
three targets: one for BFS, one for hosted_storage and one for an additional
storage domain. This seems to be working fine. However, I've noticed that the
hosted_storage domain is only utilising a single path. Is there anyway to get
hosted_storage working with MP? The output of getDeviceList is below BFS -
3600a098038304631373f4d2f70305a6b hosted_storage -
3600a098038304630662b4d612d736762 2nd data domain -
3600a098038304630662b4d612d736764 [ { "status": "used",
"vendorID": "NETAPP", "GUID": "3600a098038304631373f4d2f70305a6b",
"capacity": "53687091200", "fwrev": "9000",
"discard_zeroes_data": 0, "vgUUID": "", "pathlist": [
{ "connection": "172.31.6.4", "iqn":
"iqn.1992-08.com.netapp:sn.cd78fb1bdc5311e8a98a00a098d7cd76:vs.4",
"portal": "1027", "port": "3260",
"initiatorname": "default" }, {
"connection": "172.31.6.5", "iqn":
"iqn.1992-08.com.netapp:sn.cd78fb1bdc5311e8a98a00a098d7cd76:vs.4",
"portal": "1028", "port": "3260",
"initiatorname": "default" } ], "pvsize": "",
"discard_max_bytes": 0, "pathstatus": [ {
"capacity": "53687091200", "physdev": "sda",
"type": "iSCSI", "state": "active", "lun": "0"
}, { "capacity": "53687091200",
"physdev": "sdb", "type": "iSCSI",
"state": "active", "lun": "0" } ],
"devtype": "iSCSI", "physicalblocksize": "4096", "pvUUID": "",
"serial": "SNETAPP_LUN_C-Mode_80F17_M_p0Zk", "logicalblocksize":
"512", "productID": "LUN C-Mode" }, { "status": "used",
"vendorID": "NETAPP", "GUID":
"3600a098038304630662b4d612d736762", "capacity": "107374182400",
"fwrev": "9300", "discard_zeroes_data": 0, "vgUUID":
"CeFXY1-34gB-NJPP-tw18-nZWo-qAWu-6cx82z", "pathlist": [ {
"connection": "172.31.6.7", "iqn":
"iqn.1992-08.com.netapp:sn.39d910dede8311e8a98a00a098d7cd76:vs.5",
"portal": "1030", "port": "3260",
"initiatorname": "default" } ], "pvsize":
"106971529216", "discard_max_bytes": 0, "pathstatus": [
{ "capacity": "107374182400", "physdev":
"sdc", "type": "iSCSI", "state": "active",
"lun": "0" } ], "devtype": "iSCSI",
"physicalblocksize": "4096", "pvUUID":
"eejJVE-BTns-VgK0-s00D-t1sP-Fc4y-l60XUt", "serial":
"SNETAPP_LUN_C-Mode_80F0f+Ma-sgb", "logicalblocksize": "512",
"productID": "LUN C-Mode" }, { "status": "used",
"vendorID": "NETAPP", "GUID": "3600a098038304630662b4d612d736764",
"capacity": "1099529453568", "fwrev": "9300",
"discard_zeroes_data": 0, "vgUUID":
"QNJvat-uz1N-s53M-WlH7-NM6L-CH5F-LpVhtR", "pathlist": [ {
"connection": "172.31.6.9", "iqn":
"iqn.1992-08.com.netapp:sn.7d9d3bb2dece11e8a98a00a098d7cd76:vs.6",
"portal": "1032", "port": "3260",
"initiatorname": "default" }, {
"connection": "172.31.6.10", "iqn":
"iqn.1992-08.com.netapp:sn.7d9d3bb2dece11e8a98a00a098d7cd76:vs.6",
"portal": "1033", "port": "3260",
"initiatorname": "default" } ], "pvsize":
"1099243192320", "discard_max_bytes": 0, "pathstatus": [
{ "capacity": "1099529453568", "physdev":
"sdd", "type": "iSCSI", "state": "active",
"lun": "0" }, { "capacity":
"1099529453568", "physdev": "sdf", "type":
"iSCSI", "state": "active", "lun": "0"
} ], "devtype": "iSCSI", "physicalblocksize":
"4096", "pvUUID": "cWucdo-DYZc-IlLU-VuED-6FAa-iLdx-dq3RWU",
"serial": "SNETAPP_LUN_C-Mode_80F0f+Ma-sgd", "logicalblocksize": "512",
"productID": "LUN C-Mode" }, { "status": "used",
"vendorID": "NETAPP", "GUID": "3600a098038304631373f4d2f70305a6e",
"capacity": "536952700928", "fwrev": "9300",
"discard_zeroes_data": 0, "vgUUID": "", "pathlist": [
{ "connection": "172.31.6.9", "iqn":
"iqn.1992-08.com.netapp:sn.7d9d3bb2dece11e8a98a00a098d7cd76:vs.6",
"portal": "1032", "port": "3260",
"initiatorname": "default" }, {
"connection": "172.31.6.10", "iqn":
"iqn.1992-08.com.netapp:sn.7d9d3bb2dece11e8a98a00a098d7cd76:vs.6",
"portal": "1033", "port": "3260",
"initiatorname": "default" } ], "pvsize": "",
"discard_max_bytes": 0, "pathstatus": [ {
"capacity": "536952700928", "physdev": "sde",
"type": "iSCSI", "state": "active", "lun": "1"
}, { "capacity": "536952700928",
"physdev": "sdg", "type": "iSCSI",
"state": "active", "lun": "1" } ],
"devtype": "iSCSI", "physicalblocksize": "4096", "pvUUID": "",
"serial": "SNETAPP_LUN_C-Mode_80F17_M_p0Zn", "logicalblocksize":
"512", "productID": "LUN C-Mode" } ] ---- On Sat, 03 Nov 2018
00:01:02 +0000 Nir Soffer <nsof...@redhat.com> wrote ---- On Fri, 2 Nov 2018,
20:31 Alan G <alan+ov...@griff.me.uk wrote: I'm setting up a lab with oVirt
4.2. All hosts are disk-less and boot from a NetApp using iSCSI. All storage
domains are also iSCSI, to the same NetApp as BFS. Whenever I put a host into
maintenance vdsm seems to try to un-mount all iSCSI partitions including the OS
partition, causing the host fail. Is this a supported configuration? This works
(with some issues, see bellow) for FC, when all luns are always connected. For
iSCSI we don't have a way to prevent disconnect since we are not aware thst you
boot from one of the luns. I guess we could detect that and avoid the
disconnect but nobody sent a patch to implement it. It can work if you serve
the boot luns from a different portal on same server. The system will create
additional iscsi connection for the ovirt storage domains and disconnecting
from storage will not affect your boot luns connection. It can also work if
your luns look like FC devices - to check this option, can you share output
of: vdsm-client Host getDeviceList On one of the hosts? Elad, did we test
such setup? You also need to blacklist the boot lun in vdsm config - requires
this patch for 4.2: https://gerrit.ovirt.org/c/93301/ And add multipath
configuration for the boot lun with "no_path_retry queue" to avoid readonly
file system if you loose all paths to storage. Nir
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