Open Stack

> From: Robert Collins [mailto:robertc at robertcollins.net]
> Sent: 13 March 2014 09:52
> Subject: [openstack-dev] [TripleO] test environment requirements
> 
> So we already have pretty high requirements - its basically a 16G
> workstation as minimum.
> 
> Specifically to test the full story:
>  - a seed VM
>  - an undercloud VM (bm deploy infra)
>  - 1 overcloud control VM
>  - 2 overcloud hypervisor VMs
> ====
>    5 VMs with 2+G RAM each.
> 
> To test the overcloud alone against the seed we save 1 VM, to skip the
> overcloud we save 3.
> 
> However, as HA matures we're about to add 4 more VMs: we need a HA
> control plane for both the under and overclouds:
>  - a seed VM
>  - 3 undercloud VMs (HA bm deploy infra)
>  - 3 overcloud control VMs (HA)
>  - 2 overcloud hypervisor VMs
> ====
>    9 VMs with 2+G RAM each == 18GB
> 
> What should we do about this?
> 
> A few thoughts to kick start discussion:
>  - use Ironic to test across multiple machines (involves tunnelling brbm
> across machines, fairly easy)
>  - shrink the VM sizes (causes thrashing)
>  - tell folk to toughen up and get bigger machines (ahahahahaha, no)
>  - make the default configuration inline the hypervisors on the
> overcloud with the control plane:
>    - a seed VM
>    - 3 undercloud VMs (HA bm deploy infra)
>    - 3 overcloud all-in-one VMs (HA)
>   ====
>      7 VMs with 2+G RAM each == 14GB
> 
> 
> I think its important that we exercise features like HA and live
> migration regularly by developers, so I'm quite keen to have a fairly
> solid systematic answer that will let us catch things like bad firewall
> rules on the control node preventing network tunnelling etc... e.g. we
> benefit the more things are split out like scale deployments are. OTOH
> testing the micro-cloud that folk may start with is also a really good
> idea....

The script should be able to determine the local memory available, can we not create 2-3 configurations and choose the optimum for the developers workstation?  This keeps a low bar for entry, but allows for more complete testing by those that have the resources.

Any of the compromises reduces the effectiveness of the testing, so where no compromise is necessary it would be good to see none.

> 
> -Rob
> 
> --
> Robert Collins <rbtcollins at hp.com>
> Distinguished Technologist
> HP Converged Cloud
> 
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Thanks, 
Jon-Paul Sullivan ☺ Cloud Services - @hpcloud

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