[ovirt-users] Duplicate host_id after deployment via GUI, how is the hosted engine host_id selected?

[Thomas Klute]

Dear Simone,

thanks for the help, I already have noticed, that there is a mismatch
between SPM IDs and the hosts.
>From my knowledge this may be our fault.

 vds_name | vds_spm_id
 oVirt4   |          3
 oVirt2   |          4
 oVirt6   |          6
 oVirt5   |          5
 oVirt1   |          1
 oVirt3   |          2

oVirt3 was re-installed using the node ng image - and was assigned id 2
that was available at that time (taken into account this database query).
It was not available in fact because of the host ovirt2 having the
host_id=2 entry in the configuration on the host and the sanlock having
locked the appropriate space.

I can't remember where this mismatch came from but I assume that some
time ago someone maybe manually changed the entry on oVirt2 host in
order to match with the hostname (oVirtX -> Host id X).
Thus I think it is not a bug at the moment.

But that leads me to the next question:

Is there a manual way to align numbers in the hostnames with the SPM
IDs? (oVirt4 should be spm id 4)

Does this work? Update the database, change the entry in
hosted-engine.conf and then reboot the node?

Thanks & best regards,
Thomas


>
>
> On Mon, Apr 23, 2018 at 1:04 PM, Martin Sivak <msivak at redhat.com
> <mailto:msivak at redhat.com>> wrote:
>
>     Hello,
>
>     the ID should be coming from the SPM ID of the host as assigned by the
>     engine and duplicates should not be happening indeed.
>
>     Can you please tell us what version of engine you have and how was
>     first hosted engine node deployed? We recently changed the default
>     deployment method (4.2.2 in fact) and we would like to know whether
>     this might be related to that change or not.
>
>     Simone, do you know how to debug this? Are there logs we could use to
>     check the behavior? The host-deploy logs maybe?
>
>
> Thomas,
> can you please share the output of 
>   sudo -u postgres scl enable rh-postgresql95 -- psql -d engine -c
> "select vds_id, vds_name, vds_spm_id from vds"
> executed on the engine VM
>
> and the content of /var/log/ovirt-engine/host-deploy (still from the
> engine VM)?
>  
>
>
>     Best regards
>
>     --
>     Martin Sivak
>     SLA / oVirt
>
>     On Mon, Apr 23, 2018 at 12:54 PM, Thomas Klute <klute at ingenit.com
>     <mailto:klute at ingenit.com>> wrote:
>     > Dear oVirt Users,
>     >
>     > we installed a third ovirt node using the ovirt node ng image
>     (4.2.2), and
>     > added that node using the web interface of the hosted engine:
>     >
>     > Compute->Hosts->New - including the Hosted engine option "Choose
>     hosted
>     > engine deployment action" set to "Deploy"
>     >
>     > After that we found out, that on the new node the host_id entry
>     was causing
>     > problems. In
>     >
>     > /etc/ovirt-hosted-engine/hosted-engine.conf
>     >
>     > we found the entry
>     >
>     > ...
>     > host_id=2
>     > ...
>     >
>     > But that host id already exists and was alive during deployment
>     process.
>     > So my questions are:
>     >
>     > How is the host id chosen (when adding a new host via GUI)?
>     > Is there an option to preselect the host id in the GUI for a new
>     node?
>     > How can we prevent further duplicate host ids?
>     >
>     > Thanks and best regards,
>     > Thomas
>     >
>     >
>     > --
>     >
>     ________________________________________________________________________
>     >
>     >  Dipl.-Inform. Thomas Klute                         
>      klute at ingenit.com <mailto:klute at ingenit.com>
>     >  Geschäftsführer / CEO
>     > 
>     ----------------------------------------------------------------------
>     >  ingenit GmbH & Co. KG                       Tel. +49 (0)231 58
>     698-120
>     >  Emil-Figge-Strasse 76-80                    Fax. +49 (0)231 58
>     698-121
>     >  D-44227 Dortmund                                     
>      www.ingenit.com <http://www.ingenit.com>
>     >
>     >  Registergericht: Amtsgericht Dortmund, HRA 13 914
>     >  Gesellschafter : Thomas Klute, Marc-Christian Schröer
>     >
>     ________________________________________________________________________
>     >
>     >
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>     >
>
>

Sollten noch Fragen offen sein, stehen wir Ihnen natürlich jederzeit
gerne zur Verfügung.

Mit Grüßen aus Dortmund,
 Thomas Klute

-- 
________________________________________________________________________

 Dipl.-Inform. Thomas Klute                           klute at ingenit.com
 Geschäftsführer / CEO
 ----------------------------------------------------------------------
 ingenit GmbH & Co. KG                       Tel. +49 (0)231 58 698-120
 Emil-Figge-Strasse 76-80                    Fax. +49 (0)231 58 698-121
 D-44227 Dortmund                                       www.ingenit.com

 Registergericht: Amtsgericht Dortmund, HRA 13 914
 Gesellschafter : Thomas Klute, Marc-Christian Schröer
________________________________________________________________________

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