[ovirt-users] How can I to add RAM to Hosted Engine VM?

Simone Tiraboschi stirabos at redhat.com
Mon Sep 26 12:02:57 UTC 2016

On Mon, Sep 26, 2016 at 11:10 AM, Gianluca Cecchi <gianluca.cecchi at gmail.com
> wrote:

>>> 25.09.2016, 09:14, "Roy Golan" <rgolan at redhat.com>:
>>> You need to edit the vm in the webui and increase the memory there. The
>>> next cold boot of the machine will load it with the new config. Do note
>>> that the engine has an interval which triggers the creation of the new
>>> vm.conf. The interval config item can be checked using
>>> ```
> Hello, from which version?
> In my case I have "oVirt Engine Version:" and I get
> this error if I try to modify from web admin, but I don't understand if it
> could be related with something different....
> https://drive.google.com/file/d/0BwoPbcrMv8mvdHRHamZJZm5iRkU/
> view?usp=sharing
> Currently general pane for hosted engine vm is this one, so that OS
> appears as "Other OS" (the engien vm was installed from appliance
> initially):
> https://drive.google.com/file/d/0BwoPbcrMv8mvbkkyejJ4V1gxd2M/
> view?usp=sharing
Hi Gianluca,
are you able to recall or verify which version of ovirt-hosted-engine-setup
did you used when you initially created your hosted-engine env?

I suspect that your issue could be somehow related to
https://bugzilla.redhat.com/show_bug.cgi?id=1328921 and
https://bugzilla.redhat.com/show_bug.cgi?id=1339306 which have been fixed
which patch http://gerrit.ovirt.org/57906 for new deployment but not for
who deployed before that and than simply upgraded engine rpms over his
working engine VM.

For 4.1 we are thinking at a mechanism to upgrade also engine VM definition
when running engine-setup, currently it's not available.
Probably the best option to fix it right now is something like:
- set global maintenance mode
- manually removing the engine VM from the engine DB (to let the
auto-import procedure trigger again)
- shutdown the engine VM
- copy your /var/run/ovirt-hosted-engine-ha/vm.conf somewhere
- edit it adding the required devices
- start the engine VM with hosted-engine --vm-start --vm-conf=myvm.conf
- wait for the auto-import procedure to kick in and re-import the engine VM
with the additional devices
- exit global maintenance mode

Roy, do you see something simpler to achieve the same result?

> Thanks,
> Gianluca
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