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From Gurvinder Singh <gurvinder.si...@uninett.no>
Subject Re: spark on kubernetes
Date Sun, 22 May 2016 10:49:27 GMT
On 05/22/2016 10:23 AM, Sun Rui wrote:
> If it is possible to rewrite URL in outbound responses in Knox or other reverse proxy,
would that solve your issue?
Any process which can keep track of workers and application drivers IP
addresses and route traffic to those will work. Considering Spark Master
does exactly this due to all workers and application has to register to
the master, therefore I propose master to be the place to add such a
functionality.

I am not aware with Knox capabilities but Nginx or any other normal
reverse proxy will not be able to this on its own due to dynamic nature
of application drivers and to some extent workers too.

- Gurvinder
>> On May 22, 2016, at 14:55, Gurvinder Singh <gurvinder.singh@uninett.no> wrote:
>>
>> On 05/22/2016 08:32 AM, Reynold Xin wrote:
>>> Kubernetes itself already has facilities for http proxy, doesn't it?
>>>
>> Yeah kubernetes has ingress controller which can act the L7 load
>> balancer and router traffic to Spark UI in this case. But I am referring
>> to link present in UI to worker and application UI. Replied in the
>> detail to Sun Rui's mail where I gave example of possible scenario.
>>
>> - Gurvinder
>>>
>>> On Sat, May 21, 2016 at 9:30 AM, Gurvinder Singh
>>> <gurvinder.singh@uninett.no <mailto:gurvinder.singh@uninett.no>>
wrote:
>>>
>>>    Hi,
>>>
>>>    I am currently working on deploying Spark on kuberentes (K8s) and it is
>>>    working fine. I am running Spark with standalone mode and checkpointing
>>>    the state to shared system. So if master fails K8s starts it and from
>>>    checkpoint it recover the earlier state and things just works fine. I
>>>    have an issue with the Spark master Web UI to access the worker and
>>>    application UI links. In brief, kubernetes service model allows me to
>>>    expose the master service to internet, but accessing the
>>>    application/workers UI is not possible as then I have to expose them too
>>>    individually and given I can have multiple application it becomes hard
>>>    to manage.
>>>
>>>    One solution can be that the master can act as reverse proxy to access
>>>    information/state/logs from application/workers. As it has the
>>>    information about their endpoint when application/worker register with
>>>    master, so when a user initiate a request to access the information,
>>>    master can proxy the request to corresponding endpoint.
>>>
>>>    So I am wondering if someone has already done work in this direction
>>>    then it would be great to know. If not then would the community will be
>>>    interesting in such feature. If yes then how and where I should get
>>>    started as it would be helpful for me to have some guidance to start
>>>    working on this.
>>>
>>>    Kind Regards,
>>>    Gurvinder
>>>
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>>>
>>
>>
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