7:10 p.m.
Good day Francesco,
If I understand you correctly you can try the following via GUI:
1) Go to "Storage" menu.
2) Go to "Domain" menu.
3) Press "New Domain" button. The "New Domain" window will open.
4) Choose "iSCSI" from the "Storage Type" dropdown list.
5) At the "Discover Targets" section:
5a) For each path:
5a1) Enter path at the "Address" field.
5a2) Press "Discover" button.
5b) Press "Login All" button.
Hope it helps.
Pavel
On Mon, Nov 11, 2019 at 11:48 AM Francesco Castellano <
francesco.castellano(a)gmail.com> wrote:
Dear ones,
I beg your pardon for coming back on the same issue: let me rephrase more
succinctly.
A view from the REST API about our data domain is:
>
> $ curl -k -s -u 'admin@internal:supersecret' -H 'Accept:
> application/json' '
> https://engine.example.com/ovirt-engine/api/storagedomains' | jq '[
> .["storage_domain"?]|.[0:2]|.[]| {name:.name,storage: .storage |
> {type:.type, lun: [ .volume_group.logical_units.logical_unit[] | {portal:
> .portal, target: .target } ]} } ]'
> [
> {
> "name": "hosted_storage",
> "storage": {
> "type": "iscsi",
> "lun": [
> {
> "portal": "10.201.204.10:3260,0",
> "target":
"iqn.2002-03.com.compellent:5000d31004235a43"
> }
> ]
> }
> },
> {
> "name": "ovirt-data",
> "storage": {
> "type": "iscsi",
> "lun": [
> {
> "portal": "10.201.205.20:3260,0",
> "target":
"iqn.2002-03.com.compellent:5000d3100423524b"
> },
> {
> "portal": "10.201.205.20:3260,0",
> "target":
"iqn.2002-03.com.compellent:5000d3100423524a"
> },
> {
> "portal": "10.201.205.10:3260,0",
> "target":
"iqn.2002-03.com.compellent:5000d31004235a4b"
> },
> {
> "portal": "10.201.205.10:3260,0",
> "target":
"iqn.2002-03.com.compellent:5000d31004235a4a"
> },
> {
> "portal": "10.201.204.20:3260,0",
> "target":
"iqn.2002-03.com.compellent:5000d31004235246"
> },
> {
> "portal": "10.201.204.20:3260,0",
> "target":
"iqn.2002-03.com.compellent:5000d31004235245"
> },
> {
> "portal": "10.201.204.10:3260,0",
> "target":
"iqn.2002-03.com.compellent:5000d31004235a46"
> },
> {
> "portal": "10.201.204.10:3260,0",
> "target":
"iqn.2002-03.com.compellent:5000d31004235a45"
> }
> ]
> }
> }
> ]
Is there a way to add to the "hosted_storage" all the available path on
different iSCSI portals and different iSCSI targets, as I did for the
"ovirt-data" storage domain?
Thank you very much for your suggestions.
Best regards,
Francesco Castellano
On Wed, Nov 6, 2019 at 2:53 PM Francesco Castellano <
francesco.castellano(a)gmail.com> wrote:
> Dear sirs,
>
> we're trying to install an SHE oVirt 4.3.6 using an iSCSI SAN that
> provides us multiple targets (8) over 4 different portals. Following 5.1 of
> "RHV installation using Cockpit" we set up iscsi and multipath ahead with
a
> 90GB LUN to be used for the engine VM. Unfortunately, even if the node OS
> sees correctly the LUN, e.g.:
>
> # multipath -ll
>> 36000d31004235a000000000000000018 dm-34 COMPELNT,Compellent Vol
>> size=90G features='1 queue_if_no_path' hwhandler='0' wp=rw
>> `-+- policy='service-time 0' prio=1 status=active
>> |- 16:0:0:3 sdu 65:64 active ready running
>> |- 24:0:0:3 sdt 65:48 active ready running
>> |- 17:0:0:3 sds 65:32 active ready running
>> |- 25:0:0:3 sdv 65:80 active ready running
>> |- 15:0:0:3 sdx 65:112 active ready running
>> |- 29:0:0:3 sdw 65:96 active ready running
>> |- 28:0:0:3 sdy 65:128 active ready running
>> |- 20:0:0:3 sdz 65:144 active ready running
>> `- 21:0:0:3 sdaa 65:160 active ready running
>
>
> # lsscsi -ist | grep 36000d31004235a000000000000000018
>> [15:0:0:3] disk iqn.2002-03.com.compellent:5000d31004235a43,t,0x0
>> /dev/sdx 36000d31004235a000000000000000018 96.6GB
>> [16:0:0:3] disk iqn.2002-03.com.compellent:5000d31004235a43,t,0x0
>> /dev/sdu 36000d31004235a000000000000000018 96.6GB
>> [17:0:0:3] disk iqn.2002-03.com.compellent:5000d31004235a44,t,0x0
>> /dev/sds 36000d31004235a000000000000000018 96.6GB
>> [20:0:0:3] disk iqn.2002-03.com.compellent:5000d31004235243,t,0x0
>> /dev/sdz 36000d31004235a000000000000000018 96.6GB
>> [21:0:0:3] disk iqn.2002-03.com.compellent:5000d31004235244,t,0x0
>> /dev/sdaa 36000d31004235a000000000000000018 96.6GB
>> [24:0:0:3] disk iqn.2002-03.com.compellent:5000d31004235a48,t,0x0
>> /dev/sdt 36000d31004235a000000000000000018 96.6GB
>> [25:0:0:3] disk iqn.2002-03.com.compellent:5000d31004235a49,t,0x0
>> /dev/sdv 36000d31004235a000000000000000018 96.6GB
>> [28:0:0:3] disk iqn.2002-03.com.compellent:5000d31004235248,t,0x0
>> /dev/sdy 36000d31004235a000000000000000018 96.6GB
>> [29:0:0:3] disk iqn.2002-03.com.compellent:5000d31004235249,t,0x0
>> /dev/sdw 36000d31004235a000000000000000018 96.6GB
>>
>
> # iscsiadm -m session | grep -E '[a2]4[3489]' | sort -k 3.8
>> tcp: [1] 10.201.204.10:3260,0
>> iqn.2002-03.com.compellent:5000d31004235a43 (non-flash)
>> tcp: [2] 10.201.204.10:3260,0
>> iqn.2002-03.com.compellent:5000d31004235a43 (non-flash)
>> tcp: [3] 10.201.204.10:3260,0
>> iqn.2002-03.com.compellent:5000d31004235a44 (non-flash)
>> tcp: [6] 10.201.204.20:3260,0
>> iqn.2002-03.com.compellent:5000d31004235243 (non-flash)
>> tcp: [7] 10.201.204.20:3260,0
>> iqn.2002-03.com.compellent:5000d31004235244 (non-flash)
>> tcp: [10] 10.201.205.10:3260,0
>> iqn.2002-03.com.compellent:5000d31004235a48 (non-flash)
>> tcp: [11] 10.201.205.10:3260,0
>> iqn.2002-03.com.compellent:5000d31004235a49 (non-flash)
>> tcp: [14] 10.201.205.20:3260,0
>> iqn.2002-03.com.compellent:5000d31004235248 (non-flash)
>> tcp: [15] 10.201.205.20:3260,0
>> iqn.2002-03.com.compellent:5000d31004235249 (non-flash)
>>
>
> during the engine deploy neither via cockpit nor with "hosted-engine
> --deploy" it was able to see any LUN.
>
> Having a lot of portals (4) and each having 4 targets (two of which being
> independents path to the LUN), we chose a portal to discover, it proposed
> us 4 targets, and we had to choose a target to log in, but in the end, no
> LUN was proposed.
>
> After a few attempts, we found that, if we logged out from any targets
> (and clean up the open-iscsi database), after the login in an appropriate
> target, the installer proposed us the LUN, and we successfully deployed the
> SHE.
>
> But unfortunately, such an installation doesn't track effectively all the
> 8 paths over 8 different targets, but just the one chosen during the
> installation (this is different, for example, with respect to other LUNs
> for data domains that we attached afterwards). Thus we miss the HA we aimed
> to for the engine data domain.
>
> I said this, because when I ask for /ovirt-engine/api/storagedomains,
> whilst a second LUN has 8 children with different targets
> below storage_domain/${another data
> domain}/storage/volume_group/logical_units/logical_unit/, for the
> hosted_storage I just have one.
>
> My questions are:
>
> a) is there a way to add the other targets/paths consistently (even
> through the REST interface)?
> b) is there another installation, or recovery, procedure to get the
> engine data domain in high availability on our iSCSI topology?
>
> Thank you so much for your suggestions, they are really appreciated,
>
> Best regards,
> Francesco Castellano
>
>
>
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