Best regards,
Tristan van Bokkem
Datacenter Operations
Contact:
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------------------------------------------------------------------------
*From:* Dan Wendlandt [mailto:dan@xxxxxxxxxx]
*To:* Ghe Rivero [mailto:ghe.rivero@xxxxxxxxxxxx]
*Cc:* netstack@xxxxxxxxxxxxxxxxxxx, darren.birkett@xxxxxxxxx,
openstack@xxxxxxxxxxxxxxxxxxx
*Sent:* Tue, 21 Feb 2012 18:13:55 +0100
*Subject:* Re: [Openstack] Howto Nova setup with HA?
2012/2/21 Ghe Rivero <ghe.rivero@xxxxxxxxxxxx
<mailto:ghe.rivero@xxxxxxxxxxxx>>
BigSwitch and Nicira have created different blueprints in
quantum to add their plugins for essex-4 about ten days ago,
Cisco already have it included almost from the beginning. No
news of them for the moment, but i really hope that both of them
make it in time!
Ghe Rivero
https://blueprints.launchpad.net/quantum/+spec/quantum-nvp-plugin
https://blueprints.launchpad.net/quantum/+spec/quantum-bigswitch-plugin
To be clear, there are several more existing and planned plugins for
Quantum, even beyond the three you mention. Each plugin will make
its own trade-offs in terms of HA for control plane and data plane
components. I'm planning on organizing a talk at the Folsom
summit/conference where people have a chance to talk about their
plugins. No need for a flame war here :)
One other point of confusion that I'd like to address is that there
is NO requirement that a plugin be merged into the main Quantum repo
for it to be a "valid" plugin. I know of several plugins that are
used despite not being merged in (in fact, at the summit, we're
going to discuss if ANY plugins should remain in the main repo...
this is likely a larger decision that should be made consistently
across all openstack projects).
Dan
2012/2/21 Diego Parrilla Santamaría
<diego.parrilla.santamaria@xxxxxxxxx
<mailto:diego.parrilla.santamaria@xxxxxxxxx>>
This is the kind of flame war I love... ;-)
if you think the HA challenges in Openstack Nova are at
MySQL and Rabbit level, you are not putting the focus on the
right components. The biggest HA (and scalability)
challenges in Nova are in the networking side. There are a
lot of companies tackling the networking challenges of Nova
(BigSwitch, Nicira, Cisco, etc...), and I would like to see
how they evolve in the future and how they will address this
problem. Right now, only promises.
Fight!
--
Diego Parrilla
<http://www.stackops.com/>*CEO*
**www.stackops.com* <http://www.stackops.com/> |
*diego.parrilla@xxxxxxxxxxxx
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**
On Tue, Feb 21, 2012 at 1:04 PM, i3D.net - Tristan van
Bokkem <tristanvanbokkem@xxxxxx
<mailto:tristanvanbokkem@xxxxxx>> wrote:
__
Hi Darren,
No, I am not looking at a performance increasment at
this moment. Just trying to make the different
components Nova is build on redundant. Of course a
master/master setup of mysql / rabbitmq with a floating
IP will probably work but it bugs me that Nova is not
really build with flexibility of it components in mind.
I understand it is impossible to cover every scenario
and you can make things redundant into the infinitive
but why doesn't have Nova any of this build in? Why do I
need to setup a Virtual IP/floating IP where Nova simple
could accept multiple locations and failover if the
first location fails. Or even round-robin to distribute
the load. All I am doing now is yet add another
component that can possibly fail as well.
Best regards,
Tristan van Bokkem
Datacenter Operations
Contact:
E-mail Personal: tristanvanbokkem@xxxxxxx
<mailto:tristanvanbokkem@xxxxxxx>
E-mail Support: info@xxxxxxx <mailto:info@xxxxxxx>
E-mail NOC: noc@xxxxxxx <mailto:noc@xxxxxxx>
Website: http://www.i3d.net Office:
Interactive 3D B.V.
Meent 93b
3011 JG Rotterdam
The Netherlands
Visit www.smartdc.net <http://www.smartdc.net> – SmartDC
is our in-house 36,000 sq. ft. datacenter in Rotterdam,
The Netherlands. High density hosting – multiple fiber
carriers in-house – Level3 PoP.
Interactive 3D (i3D.net) is a company registered in The
Netherlands at Meent 93b, Rotterdam. Registration #:
14074337 - VAT # NL 8202.63.886 <tel:8202.63.886>.B01.
Interactive 3D (i3D.net) is CDSA certified on content
protection and security. We are ranked in the Deloitte
Technology Fast 50 as one of the fastest growing
technology companies.
------------------------------------------------------------------------
*From:* Darren Birkett
[mailto:darren.birkett@xxxxxxxxx
<mailto:darren.birkett@xxxxxxxxx>]
*To:* i3D.net - Tristan van Bokkem
[mailto:tristanvanbokkem@xxxxxx
<mailto:tristanvanbokkem@xxxxxx>]
*Cc:* Florian Haas [mailto:florian@xxxxxxxxxxx
<mailto:florian@xxxxxxxxxxx>],
openstack@xxxxxxxxxxxxxxxxxxx
<mailto:openstack@xxxxxxxxxxxxxxxxxxx>
*Sent:* Tue, 21 Feb 2012 12:51:11 +0100
*Subject:* Re: [Openstack] Howto Nova setup with HA?
Surely it depends what you want out of it? If just
pure high
availability (ie ability to continue functioning
when primary node
goes down), then doesn't a master/master with
floating IP fit the
bill?
It sounds like what you're after is better
performance/throughput
rather than HA - the ability to write to multiple
masters at the same
time. Even here if nova *was* able to hit multiple
databases, a
master/master setup isn't going to suit, as each
write to one master
still needs to be replicated to the other so
throughput is going to be
the same. You'd then need to look to something like
a native mysql
cluster to get actual increased throughput.
Darren
On 21 February 2012 11:34, i3D.net - Tristan van Bokkem
<tristanvanbokkem@xxxxxx
<mailto:tristanvanbokkem@xxxxxx>> wrote:
> Ho Florian,
>
> I respect your opinion of course and I am not
here to start a fight. Point
> is, how I understand it Nova really isn't very
flexible on High Availability
> terms. I have now a master/master mysql setup
with a Virtual IP working just
> to work around the shortcomings Nova imo
introduces. This same story goes
> for RabbitMQ, I need to setup RabbitMQ in HA
(which is fine) but I need to
> setup a Virtual IP for it as well just so Nova
can correctly connect to it.
> Without the VIP the hole point of setting it up
in a cluster is useless as
> you still will point nova to one single host.
>
> It shouldn't be that hard to make Nova listen to
multiple mysql addresses
> and rabbitmq hosts in a cluster?
>
>
> Best regards,
>
> Tristan van Bokkem
> Datacenter Operations
>
> Contact:
> E-mail Personal: tristanvanbokkem@xxxxxxx
<mailto:tristanvanbokkem@xxxxxxx>
> E-mail Support: info@xxxxxxx <mailto:info@xxxxxxx>
> E-mail NOC: noc@xxxxxxx <mailto:noc@xxxxxxx>
> Website: http://www.i3d.net Office:
> Interactive 3D B.V.
> Meent 93b
> 3011 JG Rotterdam
> The Netherlands
>
> Visit www.smartdc.net <http://www.smartdc.net> –
SmartDC is our in-house 36,000 sq. ft. datacenter in
> Rotterdam, The Netherlands. High density hosting
– multiple fiber carriers
> in-house – Level3 PoP.
>
> Interactive 3D (i3D.net) is a company registered
in The Netherlands at Meent
> 93b, Rotterdam. Registration #: 14074337 - VAT #
NL 8202.63.886 <tel:8202.63.886>.B01.
> Interactive 3D (i3D.net) is CDSA certified on
content protection and
> security. We are ranked in the Deloitte
Technology Fast 50 as one of the
> fastest growing technology companies.
>
> ________________________________
> From: Florian Haas [mailto:florian@xxxxxxxxxxx
<mailto:florian@xxxxxxxxxxx>]
> To: openstack@xxxxxxxxxxxxxxxxxxx
<mailto:openstack@xxxxxxxxxxxxxxxxxxx>
> Sent: Fri, 17 Feb 2012 13:32:51 +0100
>
> Subject: Re: [Openstack] Howto Nova setup with HA?
>
> On Thu, Feb 16, 2012 at 3:28 PM, i3D.net -
Tristan van Bokkem
> <tristanvanbokkem@xxxxxx
<mailto:tristanvanbokkem@xxxxxx>> wrote:
>> Hi Tom,
>>
>> Thank you very much for sharing your knowledge,
this will help not only
>> me!
>> As I am still working on the MySQL part, you
mentioned multi-master which
>> I
>> have running indeed, but I suppose there still
will need to be some kind
>> of
>> entering point within the cluster. How did you
managed this?
>
> Virtual cluster IP addresses and highly available
MySQL (either DRBD
> or MySQL replication based). Pacemaker is very
well capable of
> managing this.
>
> Of course, since you also quoted
>
http://openlife.cc/blogs/2011/july/ultimate-mysql-high-availability-solution
> parts of which I wholeheartedly disagree with (as
with all of Henrik's
> Pacemaker bashing, but he's of course entitled to
his own opinion),
> then you might run away screaming from anything
that barely mentions
> Pacemaker in passing. But in reality[1],
Pacemaker is an extremely
> capable HA stack that would be well suited for this.
>
> Cheers,
> Florian
>
> [1] To be polite, I should say "in my humble
opinion," but my opinion
> on this really isn't humble at all, so I prefer
being honest over
> being polite. :)
>
> --
> Need help with High Availability?
> http://www.hastexo.com/now
>
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Nicira Networks: www.nicira.com <http://www.nicira.com>
twitter: danwendlandt
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