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Message #08042
Re: Howto Nova setup with HA?
>
> with a simple rsync script that runs on a periodic interval that syncs the image data.
>
>> Compute servers
>> * Each run their own copy of nova-api (only instances running on the
>> node use this)
>
> No. Compute nodes run nova-compute, not nova-api.
>
I think the intent here was to have access to the metadata service on each compute node - hence running both n-compute and n-API (this also avoids issues in getting metadata requests between nodes)
>> * nova-network (multi-host configuration) with private network <-- Needs
>> its own discussion I guess.
>>
>> Keystone
>> * How about keystone, same as glance I guess?
>
> Similar to glance-registry.
>
> Cheers,
> -jay
>
>> Best regards,
>>
>> Tristan van Bokkem
>> Datacenter Operations
>>
>> Contact:
>> E-mail Personal: tristanvanbokkem@xxxxxxx <mailto:tristanvanbokkem@xxxxxxx>
>> E-mail Support: info@xxxxxxx <mailto:info@xxxxxxx>
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>>
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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
>> <mailto:diego.parrilla@xxxxxxxxxxxx>****| +34 649 94 43 29
>> <tel:%2B34%20649%2094%2043%2029> | skype:diegoparrilla*
>> * <http://www.stackops.com/>
>> **
>>
>>
>>
>> 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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>>
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>>
>> --
>> Ghe Rivero
>> *OpenStack & Distribution Engineer
>> ***www.stackops.com* <http://www.stackops.com/> |
>> *ghe.rivero@xxxxxxxxxxxx
>> <mailto:diego.parrilla@xxxxxxxxxxxx>****| +34 625 63 45 23 |
>> skype:ghe.rivero*
>> * <http://www.stackops.com/>
>> *
>>
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>>
>> --
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> Dan Wendlandt
>> Nicira Networks: www.nicira.com <http://www.nicira.com>
>> twitter: danwendlandt
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>>
>>
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