Adding Sandro,
Sandro, do you have any ideas?



On Tue, Nov 12, 2019 at 1:03 PM Alan G <alan+ov...@griff.me.uk> wrote:

> I have the same issue and haven't been able to find a solution. It seems
> that the initial LUN is hard coded into
> /etc/ovirt-hosted-engine/hosted-engine.conf and there's no way to add
> additional paths to it.
>
>
> ---- On Mon, 11 Nov 2019 17:42:17 +0000 *Francesco Castellano
> <francesco.castell...@gmail.com <francesco.castell...@gmail.com>>* wrote
> ----
>
> 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 <p...@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.castell...@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.castell...@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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