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+1, long awaited


> On 27 Jan 2015, at 14:05, Aleksandr Didenko <adidenko at mirantis.com> wrote:
> 
> Hi,
> 
> After starting implementing granular deployment we've faced a bunch of issues that would make further development of this feature much more complicated if we have to support both Simple and HA deployment modes. For example: simple mode does not require cluster (corosync, pacemaker, vips, etc), so we had to skip this task for Simple mode somehow - we can use conditional tasks, or conditional manifests in our tasks, or create separate task graphs for different deployment modes, etc - either way it's pretty much doubling the amount of work for some parts of Fuel and our development cycle.
> 
> At the moment, CI blocks us from further development of fuel-library modularization BP [2] because we still use Simple mode in CI. So in order to proceed with this BP we have two options:
> 
> 1) remove Simple mode from CI/QA and thus drop it completely from Fuel
> 2) double our efforts to support both Simple and HA modes in granular deployment
> 
> We have a BP about single-controller HA [1]. HA with single controller works just fine at the moment. So if you want to test Fuel on a minimum set of nodes, you can do this on 3 nodes (Fuel master, controller, compute), just like with Simple mode before. I suppose, it's time to finally drop support for Simple mode in Fuel :)
> 
> [1] https://blueprints.launchpad.net/fuel/+spec/single-controller-ha
> [2] https://blueprints.launchpad.net/fuel/+spec/fuel-library-modularization
> 
> --
> Regards,
> Aleksandr Didenko
> 
> 
> On Tue, Aug 26, 2014 at 9:25 AM, Mike Scherbakov <mscherbakov at mirantis.com> wrote:
> Definitely fuel spec is needed :)
> 
> 
> On Mon, Aug 25, 2014 at 8:45 PM, Evgeniy L <eli at mirantis.com> wrote:
> Hi Andrew, 
> 
> I have some comments regarding to you action items
> 
> >> 2) Removing simple mode from the ui and tests
> >> 3) Removing simple mode support from nailgun (maybe we leave it) and cli
> 
> We shouldn't do it, because nailgun should handle both versions of cluster.
> What we have to do here is to use openstack.yaml to keep all possible modes.
> For new release there will be only ha, to manage previous releases we have
> to create data migrations in nailgun to create the filed with modes i.e. multinode
> and ha.
> 
> Also fixes for ui are required too, I think it mostly related to wizard, 'mode' tab
> where use can chose ha or non ha cluster in case of new release there should
> be only ha, and in case of old releases there should be ha and multinode.
> 
> Thanks,
> 
> 
> 
> On Mon, Aug 25, 2014 at 8:19 PM, Andrew Woodward <xarses at gmail.com> wrote:
> Started a new thread so that we don't hijack the older thread.
>  as 
>  
> Andrew, will you work on it in 6.0? What are remaining items there? Also, it might affect our tests - simple mode runs faster so we use it for smoke ISO test. Anastasia, please confirm that we can switch smoke to one-ha-controller model, or even drop smoke at all and use BVT only (running CentOS 3 HA controllers and same with Ubuntu).
> 
> The primary reason that we haven't disabled single yet is was due to [0] where we where having problems adding additional controllers. With the changes to galera and rabbit clustering it appears that we ended up fixing it already.
> 
> The remaining issues are:
> 1) Ensuring we have good test coverage for the cases we expect to support [1]
> 2) Removing simple mode from the ui and tests
> 3) Removing simple mode support from nailgun (maybe we leave it) and cli
> 4) Updating documentation
> 
> [0] https://bugs.launchpad.net/fuel/+bug/1350266
> [1] https://bugs.launchpad.net/fuel/+bug/1350266/comments/7
> 
> -- 
> Andrew
> Mirantis
> Ceph community
> 
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> -- 
> Mike Scherbakov
> #mihgen
> 
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-- 
Tomasz 'Zen' Napierala
Sr. OpenStack Engineer
tnapierala at mirantis.com