[ovirt-users] How does VDSM-Fake actually work?

Wed Feb 17 18:28:16 UTC 2016

Hi Roman,

El 16/02/16 a las 10:27, Roman Mohr escribió:
> On Fri, Feb 12, 2016 at 12:45 PM, Michal Skrivanek 
> <michal.skrivanek at redhat.com <mailto:michal.skrivanek at redhat.com>> wrote:
>
>
>>     On 09 Feb 2016, at 12:15, Nicolás <nicolas at devels.es
>>     <mailto:nicolas at devels.es>> wrote:
>>
>>     Is there a way to get an account on mojo.redhat.com
>>     <http://mojo.redhat.com> or is it internal? I'm trying to open
>>     the document but credentials are required and I see no option to
>>     create an account.
>
>     yes it is
>
>     Eldad, would you please move it to ovirt.org <http://ovirt.org>
>     instead?
>
>
> I recently played with fakevdsm myself. The result was the patch 
> series in [1]. At least an updated README for the result of my patches 
> can be found in [2].
>
>     Thanks,
>     michal
>
>>
>>     El 04/02/16 a las 13:49, emarcian escribió:
>>>     Hi,
>>>     Seems like you need to change this settings update vdc_options
>>>     set option_value='false' where option_name='InstallVds';
>>>     follow the instructions here:
>>>     https://mojo.redhat.com/docs/DOC-990399
>>>
>>>     in case you using 3.6 there is a new war (if you run the
>>>     simulator as standalone).
>>>
>>>     -Eldad
>>>
>>>
>>>     On 02/04/2016 03:04 PM, Piotr Kliczewski wrote:
>>>>     Eldad is working on making it working with engine 3.6. He should be able to
>>>>     give you information you need.
>>>>
>>>>     On Wed, Feb 3, 2016 at 12:33 PM,<nicolas at devels.es> <mailto:nicolas at devels.es>  wrote:
>>>>>     Anything?
>>>>>
>>>>>     El 2016-02-02 10:18, Nicolás escribió:
>>>>>>     Hi,
>>>>>>
>>>>>>       I'm trying to set up VDSM-Fake
>>>>>>     (git://gerrit.ovirt.org/ovirt-vdsmfake.git) for some tests, however,
>>>>>>     I'm a bit confused about how does it actually work. As the
>>>>>>     instructions say, I was able to build the project with Maven (however,
>>>>>>     the org.ovirt.vdsm-jsonrpc-java dependency version had to be changed
>>>>>>     to 1.1.5 instead of 1.1.2-SNAPSHOT in pom.xml as this latter is no
>>>>>>     longer provided at the repository).
>>>>>>
>>>>>>       Once built, I run mvn jetty:run and the server started correctly:
>>>>>>
>>>>>>>     2016-02-02 11:01:51.957:INFO::jetty-6.1.26  [1]
>>>>>>>     2016-02-02 11:01:52.804:INFO::No  [2] Transaction manager found - if
>>>>>>>     your webapp requires one, please configure one.
>>>>>>>     2016-02-02 11:01:53,424 Application initialized.
>>>>>>>     2016-02-02 11:01:53,442 Opening a Stomp server localhost:54322
>>>>>>>     2016-02-02 11:01:53.702:INFO::Started  [3]
>>>>>>>     SelectChannelConnector at 0.0.0.0:54321
>>>>>>>     <mailto:SelectChannelConnector at 0.0.0.0:54321>
>>>>>>>     [INFO] Started Jetty Server
>>>>>>>     [INFO] Starting scanner at interval of 10 seconds.
>>>>>>       I could indeed verify it's listening on the VDSM port:
>>>>>>
>>>>>>>     [root at host ovirt-vdsmfake]# netstat -atpn | grep 54321
>>>>>>>     tcp6       0      0
>>>>>>>     :::54321
>>>>>>>     :::*                    LISTEN
>>>>>>>     44870/java
>>>>>>       So the next step is to add a fake host via REST. I used scripts
>>>>>>     provided here [4] and I successfully added the host, however, it
>>>>>>     starts installing all the VDSM packages as it were a normal host and
>>>>>>     therefore it tries to start vdsmd as well, which throws an error as
>>>>>>     the Jetty Server is already listening on the 54321 port. I shut down
>>>>>>     the Jetty Server and allowed oVirt Manager to install all the packages
>>>>>>     properly, then stopped vdsmd and started the Jetty Server, but
>>>>>>     expectedly oVirt Engine fails with message "Host xxx is non
>>>>>>     responsive", so what I actually got is a real VDSM host and not a fake
>>>>>>     one.
>>>>>>
>>>>>>       FWIW, the fake VDSM runs on a different host, ports are reacheable
>>>>>>     from the oVirt engine, proper /etc/hosts has been added to the engine
>>>>>>     to reach the host, and no further customization of web.xml has been
>>>>>>     done.
>>>>>>
>>>>>>       I feel like I'm missing something here. Could someone shed some light
>>>>>>     on what's wrong?
>>>>>>
>>>>>>       Thanks.
>>>>>>
>>>>>>       Nicolás
>
>
> @Nicolas I would recommend you to use the top of my gerrit patches to 
> run vdsmake:
>
>   git clone git://gerrit.ovirt.org/ovirt-vdsmfake 
> <http://gerrit.ovirt.org/ovirt-vdsmfake>
>   cd ovirt-vdsmfake
>   git fetch git://gerrit.ovirt.org/ovirt-vdsmfake 
> <http://gerrit.ovirt.org/ovirt-vdsmfake> refs/changes/70/53570/2 && 
> git checkout FETCH_HEAD
>
> then follow the instructions in the README of the checked out 
> repository [3].
>
> Hope that helps.
>
> Best Regards,
> Roman
>
>
> [1] 
> https://gerrit.ovirt.org/#/q/status:open+project:ovirt-vdsmfake+branch:master+topic:easy_access
> [2] https://gerrit.ovirt.org/#/c/53570/
> [3] https://gerrit.ovirt.org/#/c/53570/2/README
>

I could finally make fakevdsm work with your changes. Maybe I'm missing 
something but this works if the engine and the fake host are run on the 
same server - when I tried to run the fake host on a different host I 
wasn't seeing any responses from the host (the firewall was vanilla 
clean). In any case, I'm ok with both running on the same machine.

Will this be merged into master?

Thanks.
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