Open Stack

+1.

Regards,
Bulat Gaifullin
Mirantis Inc.



> On 08 Feb 2016, at 19:05, Igor Kalnitsky <ikalnitsky at mirantis.com> wrote:
> 
> Hey Fuelers,
> 
> When we are going to enable it? I think since HCF is passed for
> stable/8.0, it's time to enable task-based deployment for master
> branch.
> 
> Opinion?
> 
> - Igor
> 
> On Wed, Feb 3, 2016 at 12:31 PM, Bogdan Dobrelya <bdobrelia at mirantis.com> wrote:
>> On 02.02.2016 17:35, Alexey Shtokolov wrote:
>>> Hi Fuelers!
>>> 
>>> As you may be aware, since [0] Fuel has implemented a new orchestration
>>> engine [1]
>>> We switched the deployment paradigm from role-based (aka granular) to
>>> task-based and now Fuel can deploy all nodes simultaneously using
>>> cross-node dependencies between deployment tasks.
>> 
>> That is great news! Please do not forget about docs updates as well.
>> Those docs are always forgotten like poor orphans... I submitted a patch
>> [0] to MOS docs, please review and add more details, if possible, for
>> plugins impact as well.
>> 
>> [0] https://review.fuel-infra.org/#/c/16509/
>> 
>>> 
>>> This feature is experimental in Fuel 8.0 and will be enabled by default
>>> for Fuel 9.0
>>> 
>>> Allow me to show you the results. We made some benchmarks on our bare
>>> metal lab [2]
>>> 
>>> Case #1. 3 controllers + 7 computes w/ ceph.
>>> Task-based deployment takes *~38* minutes vs *~1h15m* for granular (*~2*
>>> times faster)
>>> Here and below the deployment time is average time for 10 runs
>>> 
>>> Case #2. 3 controllers + 3 mongodb + 4 computes w/ ceph.
>>> Task-based deployment takes *~41* minutes vs *~1h32m* for granular
>>> (*~2.24* times faster)
>>> 
>>> 
>>> 
>>> Also we took measurements for Fuel CI test cases. Standard BVT (Master
>>> node + 3 controllers + 3 computes w/ ceph. All are in qemu VMs on one host)
>>> 
>>> Fuel CI slaves with *4 *cores *~1.1* times faster
>>> In case of 4 cores for 7 VMs they are fighting for CPU resources and it
>>> marginalizes the gain of task-based deployment
>>> 
>>> Fuel CI slaves with *6* cores *~1.6* times faster
>>> 
>>> Fuel CI slaves with *12* cores *~1.7* times faster
>> 
>> These are really outstanding results!
>> (tl;dr)
>> I believe the next step may be to leverage the "external install & svc
>> management" feature (example [1]) of the Liberty release (7.0.0) of
>> Puppet-Openstack (PO) modules. So we could use separate concurrent
>> cross-depends based tasks *within a single node* as well, like:
>> - task: install_all_packages - a singleton task for a node,
>> - task: [configure_x, for each x] - concurrent for a node,
>> - task: [manage_service_x, for each x] - some may be concurrent for a
>> node, while another shall be serialized.
>> 
>> So, one might use the "--tags" separator for concurrent puppet runs to
>> make things go even faster, for example:
>> 
>> # cat test.pp
>> notify
>> {"A": tag => "a" }
>> notify
>> {"B": tag => "b" }
>> 
>> # puppet apply test.pp
>> Notice: A
>> Notice: /Stage[main]/Main/Notify[A]/message: defined 'message' as 'A'
>> Notice: B
>> Notice: /Stage[main]/Main/Notify[B]/message: defined 'message' as 'B'
>> 
>> # puppet apply test.pp --tags a
>> Notice: A
>> Notice: /Stage[main]/Main/Notify[A]/message: defined 'message' as 'A'
>> 
>> # puppet apply test.pp --tags a & puppet apply test.pp --tags b
>> Notice: B
>> Notice: /Stage[main]/Main/Notify[B]/message: defined 'message' as 'B'
>> Notice: A
>> Notice: /Stage[main]/Main/Notify[A]/message: defined 'message' as 'A'
>> 
>> Which is supposed to be faster, although not for this example.
>> 
>> [1] https://review.openstack.org/#/c/216926/3/manifests/init.pp
>> 
>>> 
>>> You can see additional information and charts in the presentation [3].
>>> 
>>> [0]
>>> - http://lists.openstack.org/pipermail/openstack-dev/2015-December/082093.html
>>> [1]
>>> - https://specs.openstack.org/openstack/fuel-specs/specs/8.0/task-based-deployment-mvp.html
>>> [2] -  3 x HP ProLiant DL360p Gen8 (XeonE5 6 cores/64GB/SSD)  + 7 x HP
>>> ProLiant DL320p Gen8 (XeonE3 4 cores/8-16GB/HDD)
>>> [3] -
>>> https://docs.google.com/presentation/d/1jZCFZlXHs_VhjtVYS2VuWgdxge5Q6sOMLz4bRLuw7YE
>>> 
>>> ---
>>> WBR, Alexey Shtokolov
>>> 
>>> 
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>>> 
>> 
>> 
>> --
>> Best regards,
>> Bogdan Dobrelya,
>> Irc #bogdando
>> 
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