Open Stack

Hi team,

A blueprint was created for tracking this idea: https://blueprints.launchpad.net/magnum/+spec/manually-manage-bay-nodes . I won't approve the BP until there is a team decision on accepting/rejecting the idea.

From the discussion in design summit, it looks everyone is OK with the idea in general (with some disagreements in the API style). However, from the last team meeting, it looks some people disagree with the idea fundamentally. so I re-raised this ML to re-discuss.

If you agree or disagree with the idea of manually managing the Heat stacks (that contains individual bay nodes), please write down your arguments here. Then, we can start debating on that.

Best regards,
Hongbin

> -----Original Message-----
> From: Cammann, Tom [mailto:tom.cammann at hpe.com]
> Sent: May-16-16 5:28 AM
> To: OpenStack Development Mailing List (not for usage questions)
> Subject: Re: [openstack-dev] [magnum] Discuss the idea of manually
> managing the bay nodes
> 
> The discussion at the summit was very positive around this requirement
> but as this change will make a large impact to Magnum it will need a
> spec.
> 
> On the API of things, I was thinking a slightly more generic approach
> to incorporate other lifecycle operations into the same API.
> Eg:
> magnum bay-manage <bay> <life-cycle-op>
> 
> magnum bay-manage <bay> reset –hard
> magnum bay-manage <bay> rebuild
> magnum bay-manage <bay> node-delete <name/uuid> magnum bay-manage <bay>
> node-add –flavor <flavor> magnum bay-manage <bay> node-reset <name>
> magnum bay-manage <bay> node-list
> 
> Tom
> 
> From: Yuanying OTSUKA <yuanying at oeilvert.org>
> Reply-To: "OpenStack Development Mailing List (not for usage
> questions)" <openstack-dev at lists.openstack.org>
> Date: Monday, 16 May 2016 at 01:07
> To: "OpenStack Development Mailing List (not for usage questions)"
> <openstack-dev at lists.openstack.org>
> Subject: Re: [openstack-dev] [magnum] Discuss the idea of manually
> managing the bay nodes
> 
> Hi,
> 
> I think, user also want to specify the deleting node.
> So we should manage “node” individually.
> 
> For example:
> $ magnum node-create —bay …
> $ magnum node-list —bay
> $ magnum node-delete $NODE_UUID
> 
> Anyway, if magnum want to manage a lifecycle of container
> infrastructure.
> This feature is necessary.
> 
> Thanks
> -yuanying
> 
> 
> 2016年5月16日(月) 7:50 Hongbin Lu
> <hongbin.lu at huawei.com<mailto:hongbin.lu at huawei.com>>:
> Hi all,
> 
> This is a continued discussion from the design summit. For recap,
> Magnum manages bay nodes by using ResourceGroup from Heat. This
> approach works but it is infeasible to manage the heterogeneity across
> bay nodes, which is a frequently demanded feature. As an example, there
> is a request to provision bay nodes across availability zones [1].
> There is another request to provision bay nodes with different set of
> flavors [2]. For the request features above, ResourceGroup won’t work
> very well.
> 
> The proposal is to remove the usage of ResourceGroup and manually
> create Heat stack for each bay nodes. For example, for creating a
> cluster with 2 masters and 3 minions, Magnum is going to manage 6 Heat
> stacks (instead of 1 big Heat stack as right now):
> * A kube cluster stack that manages the global resources
> * Two kube master stacks that manage the two master nodes
> * Three kube minion stacks that manage the three minion nodes
> 
> The proposal might require an additional API endpoint to manage nodes
> or a group of nodes. For example:
> $ magnum nodegroup-create --bay XXX --flavor m1.small --count 2 --
> availability-zone us-east-1 ….
> $ magnum nodegroup-create --bay XXX --flavor m1.medium --count 3 --
> availability-zone us-east-2 …
> 
> Thoughts?
> 
> [1] https://blueprints.launchpad.net/magnum/+spec/magnum-availability-
> zones
> [2] https://blueprints.launchpad.net/magnum/+spec/support-multiple-
> flavor
> 
> Best regards,
> Hongbin
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