12:42 p.m.
Hi Pavel,
thanks. This happens to be a prefect way to add a storage domain with all
the available paths; but unfortunately, I wanted to add the missing paths
for the hosted storage data domain, the data domain hosting the self-hosted
engine vm; and I'm not sure how to "change" the configs for hosted-storage
domain without the GUI provided by the engine itself.
Kind regards,
Francesco
On Mon, Nov 11, 2019 at 6:10 PM Pavel Bar <pbar(a)redhat.com> wrote:
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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