[ovirt-devel] Engine High Availability

[Yaniv Kaul]

On Sun, Mar 6, 2016 at 1:24 PM, Sunny Shin <sunny4s.git at gmail.com> wrote:

>
> The relationship between ManageIQ and CloudForms seems the same as the one
> between oVirt and RHEVM, right?


Indeed. And we (the oVirt team) intend to contribute more and more to the
ManageIQ oVirt provider, to make it best in class!
Here's a fresh example being worked on -
https://github.com/ManageIQ/ovirt/pull/47
Y.


> Thank you so much for all your hard work and good information.
>
> Sunny
>
>
> 2016년 3월 6일 일요일, Yaniv Kaul<ykaul at redhat.com>님이 작성한 메시지:
>
> On Sat, Mar 5, 2016 at 4:48 AM, Sunny Shin <sunny4s.git at gmail.com> wrote:
>>
>>>
>>> It seems one engine has limitation such as not supporting over thousands
>>> or ten thousands of hosts. I heard that openstack supports unlimited(?)
>>> hosts with engine clustering similar to active-active ha. So, I thought
>>> that if active-active ha is supported, much more hosts are supported with
>>> one engine set.
>>
>>
>> As for OpenStack, I'll just advise that you don't believe everything you
>> hear.
>>
>>
>>> With current ovirt engine, if we want to deploy thousands of hosts, we
>>> may need multiple separate engines with hundreds of hosts each. And each
>>> engine has its own admin portal without one combined user interface. Am
>>> I right?
>>>
>>
>> Correct, though you can and should use ManageIQ[1] for example to manage
>> multiple oVirt engines. We are eagerly working on improving our integration
>> with it.
>> We are looking both into the next generation of oVirt engine to allow
>> higher scale as well as the coming release to improve the scale somewhat.
>> Y.
>>
>> [1] http://manageiq.org/
>>
>>>
>>> Sunny
>>>
>>>
>>> 2016년 3월 5일 토요일, Yaniv Kaul<ykaul at redhat.com>님이 작성한 메시지:
>>>
>>> On Fri, Mar 4, 2016 at 11:48 AM, Sunny Shin <sunny4s.git at gmail.com>
>>>> wrote:
>>>>
>>>>>
>>>>> Yaniv,
>>>>>
>>>>> Could you a little bit more elaborate what you are working on for
>>>>> engine scailability? I thought that active-active ha is the only way for
>>>>> that.
>>>>>
>>>>
>>>> Active Active is useful for both HA (where we believe hosted-engine is
>>>> a good solution) as well as scalability. If we improve the current
>>>> scalability, then we are good there too.
>>>> I've given several items below - it'd be difficult to enumerate all of
>>>> them - I suggest going through the gerrit commits in the last 2 months or
>>>> so and look at some of the work that has taken and is taking place, across
>>>> all areas of the product. Few random examples:
>>>> https://gerrit.ovirt.org/#/c/36593/
>>>> https://gerrit.ovirt.org/#/c/51235/
>>>>
>>>>
>>>> Is there anything specifically you are looking for?
>>>>
>>>>
>>>>> Sunny
>>>>>
>>>>>
>>>>> 2016년 3월 4일 금요일, Yaniv Kaul<ykaul at redhat.com>님이 작성한 메시지:
>>>>>
>>>>>
>>>>>>
>>>>>> On Fri, Mar 4, 2016 at 10:45 AM, Sunny Shin <sunny4s.git at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi Yaniv,
>>>>>>>
>>>>>>> Is there a plan to implement active-active HA in the near future? Is
>>>>>>> there any progress on it since the discussion in August 2013?
>>>>>>>
>>>>>>
>>>>>> No, not at the moment. We feel that Self-Hosted Engine (SHE) is a
>>>>>> great solution thus far.
>>>>>> We are working on improving the performance and scale of the engine,
>>>>>> to be able to handle more load, more hosts, more VMs, etc.
>>>>>> This is an ongoing work across all components, from VDSM, to engine
>>>>>> core, REST API, database calls and more.
>>>>>> Y.
>>>>>>
>>>>>>
>>>>>>>
>>>>>>> Sunny
>>>>>>>
>>>>>>> 2016-03-04 17:38 GMT+09:00 Yaniv Kaul <ykaul at redhat.com>:
>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Fri, Mar 4, 2016 at 2:03 AM, Sunny Shin <sunny4s.git at gmail.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Hi All,
>>>>>>>>>
>>>>>>>>> In the new architecture page (
>>>>>>>>> http://www.ovirt.org/documentation/architecture/architecture/),
>>>>>>>>> overall architecture picture shows that engine supports active-active high
>>>>>>>>> availability.
>>>>>>>>>
>>>>>>>>
>>>>>>>> This is inaccurate - the engine is not highly available in A/A
>>>>>>>> architecture. I'd appreciate if you could file an issue for it so we'll fix
>>>>>>>> this page.
>>>>>>>>
>>>>>>>>
>>>>>>>>>
>>>>>>>>> However, as per engine HA page (
>>>>>>>>> http://www.ovirt.org/develop/release-management/features/engine/engine-high-availability/),
>>>>>>>>> active-active HA is not supported yet and there are several implementation
>>>>>>>>> issues.
>>>>>>>>>
>>>>>>>>> So, could anyone give me a brief explanation about discrepancy
>>>>>>>>> between these two pages, and about the plan to implement this feature if
>>>>>>>>> not implemented yet?
>>>>>>>>>
>>>>>>>>
>>>>>>>> I suggest looking at self-hosted engine, which provides non-A/A
>>>>>>>> high availability for the engine.
>>>>>>>> Y.
>>>>>>>>
>>>>>>>>
>>>>>>>>>
>>>>>>>>> Sunny
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> Devel mailing list
>>>>>>>>> Devel at ovirt.org
>>>>>>>>> http://lists.ovirt.org/mailman/listinfo/devel
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>
>>
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