fuel-dev team mailing list archive

[Dmitriy Novakovskiy <dnovakovskiy@xxxxxxxxxxxx>]

I may be wrong, but it seems like MongoDB is relevant only as a backend for
Ceilometer. I'm also not sure if there are any configuration screens
related to it.

To my current understanding:
- In 4.x we used MySQL as backend for Ceilometer, due to know bugs of
Ceilometer+MySQL Web GUI part of Ceilometer part didn't work
- In 5.x we use MongoDB as backend for Ceilometer - all should be working
neatly now :)

---
Regards,
Dmitriy


On Sat, May 24, 2014 at 8:23 AM, Meg McRoberts <mmcroberts@xxxxxxxxxxxx>wrote:

> Hi, all.  Does anyone have a sentence or two (or more) to add about
> MongoDB in OpenStack 5.0?
> This is the terminology article I have:
>
> http://docs.mirantis.com/openstack/fuel/fuel-5.0/terminology.html#mongodb
>
> It is just a bit weak, I'd say...
>
> I would like to have at least enough information to tell people what to do
> about the MongoDB item
> on the Fuel configuration screens:
>
>
> http://docs.mirantis.com/openstack/fuel/fuel-5.0/user-guide.html#assign-a-role-or-roles-to-each-node-server
>
> I do understand that a lot more MongoDB functionality is coming in 5.1.  I
> could include a link to the blueprint
> in the terminology article if you think it's appropriate, or make a vague
> statement about ongoing development
> work.
>
> Thanks much,
> meg
>
>
> On Wed, Apr 2, 2014 at 6:59 AM, Bogdan Dobrelya <bdobrelia@xxxxxxxxxxxx>wrote:
>
>> On 04/01/2014 03:58 PM, Vladimir Kuklin wrote:
>> > Guys
>> >
>> > We had a MongoDB integration meeting today and that;s what we discussed
>> > ordered by priority.
>> >
>> > Overall list of things to be done:
>> >
>> > 1) High: Finish work on puppet manifests:
>> >              replicaset connection
>> >              fix admin user rights
>> > 2) High: Check nailgun disk allocation in case of role combination
>> > 3) High: Use the following scheme for disk allocation
>> >              floor(n-1/2) for combined roles
>> >              n-1 for mongo-only node
>> > 4) Medium: use striped LVM/mdraid for mongo nodes - (the same for ceph)
>>
>> I believe native sharding[0] should be used instead of hw-level
>> "simulations" (striped raids) because sharding handles "entering
>> to/recovering from partitioning state"[1] far way better then degraded
>> striped raids could do :-)
>> Please correct me, if I'm wrong (I'm new with MongoDB and this
>> "sharding" stuff)
>>
>> [0] about sharding in Mongo (RU) http://habrahabr.ru/post/217393/
>> [1] some CAP consideraions
>>
>> http://www.infoq.com/articles/cap-twelve-years-later-how-the-rules-have-changed
>>
>> > 5) High: UI:
>> >              role-setting dependencies -> rebase mongo UI role request
>> >              1-disk mongo node should raise caution of non-production
>> > scenario
>> > 6) Medium: perform I/O tuning for filesystem (the same for ceph?):
>> >     a) deadline scheduler
>> >     b) common high-performance mount options (noatime, barriers=0,
>> > commit=600, journal=writeback)
>> > 7) Low: SSD-disks are preferrable
>> >
>> > These changes are to be reflected in the blueprint
>> > <https://blueprints.launchpad.net/fuel/+spec/mongodb-fuel-integration>
>> > drafted by Max Mazur.
>> >
>> > Please, provide your input or feedback if you have any.
>> >
>> >
>> > --
>> > Yours Faithfully,
>> > Vladimir Kuklin,
>> > Fuel Library Tech Lead,
>> > Mirantis, Inc.
>> > +7 (495) 640-49-04
>> > +7 (926) 702-39-68
>> > Skype kuklinvv
>> > 45bk3, Vorontsovskaya Str.
>> > Moscow, Russia,
>> > www.mirantis.com <http://www.mirantis.ru/>
>> > www.mirantis.ru <http://www.mirantis.ru/>
>> > vkuklin@xxxxxxxxxxxx <mailto:vkuklin@xxxxxxxxxxxx>
>> >
>> >
>>
>>
>> --
>> Best regards,
>> Bogdan Dobrelya,
>> Skype #bogdando_at_yahoo.com
>> Irc #bogdando
>>
>> --
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