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From haosdent <haosd...@gmail.com>
Subject Re: service discovery in Mesos on CoreOS
Date Tue, 30 Jun 2015 03:19:57 GMT
Also have another service discovery tool. https://www.consul.io/
https://github.com/CiscoCloud/mesos-consul

On Tue, Jun 30, 2015 at 10:51 AM, zhou weitao <zhouwtlord@gmail.com> wrote:

>
>
> 2015-06-30 6:23 GMT+08:00 Andras Kerekes <andras.kerekes@ishisystems.com>:
>
>> Hi,
>>
>>
>>
>> Is there a preferred way to do service discovery in Mesos via mesos-dns
>> running on CoreOS? I’m trying to implement a simple app which consists of
>> two docker containers and one of them (A) depends on the other (B). What
>> I’d like to do is to tell container A to use a fix dns name
>> (containerB.marathon.mesos in case of mesos-dns) to find the other service.
>> There are at least 3 different ways I think it can be done, but the 3 I
>> found all have some shortcomings.
>>
>>
>>
>> 1.       Use SRV records to get the port along with the IP. Con: I’d
>> prefer not to build the logic of handling SRV records into the app, it can
>> be a legacy app that is difficult to modify
>>
>> 2.       Use haproxy on slaves and connect via a well-known port on
>> localhost. Cons: the Marathon provided script does not run on CoreOS, also
>> I don’t know how to run haproxy on CoreOS outside of a docker container. If
>> it is running in a docker container, then how can it dynamically allocate
>> ports on localhost if a new service is discovered in Marathon/Mesos?
>>
> Do you know this repo? https://github.com/QubitProducts/bamboo . And here
> our corp one https://github.com/Dataman-Cloud/bamboo branched from the
> above.
>
>> 3.       Use dedicated port to bind the containers to. Con: I can have
>> only as many instances of a service as many slaves I have because they bind
>> to the same port.
>>
>>
>>
>> What other alternatives are there?
>>
>>
>>
>> Thanks,
>>
>> Andras
>>
>
>


-- 
Best Regards,
Haosdent Huang

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