> On Jun 1, 2015, at 1:37 PM, Nathaniel Braun <n.br...@criteo.com> wrote:
>
> By the way, regarding the _HOST convention: I indeed saw hat in the HBase
> package, and it works perfectly.
>
> What I meant was, I'm probably not the only one to need this. It would maybe
> be good to provide an "official" way of accomplishing it :)
I assume you mean an official Slider mechanism, since my understanding is that
the _HOST convention is used throughout other Hadoop related projects.
>
> Thanks
>
>
> ________________________________________
> From: Nathaniel Braun <n.br...@criteo.com>
> Sent: Monday, June 1, 2015 7:20 PM
> To: dev@slider.incubator.apache.org
> Subject: Re: Need hostname for use in appConfig.json
>
> Thanks for your answer,
>
> I did try using {THIS_HOST}, it didn't work
>
> Regards,
> Nathaniel
>
> ________________________________________
> From: Jon Maron <jma...@hortonworks.com>
> Sent: Monday, June 1, 2015 6:39:41 PM
> To: dev@slider.incubator.apache.org
> Subject: Re: Need hostname for use in appConfig.json
>
> Alternatively, you could also try using the convention used elsewhere in
> hadoop: username/_HOST@domain. _HOST is generally replaced at runtime with
> the host name. Most applications currently honor that convention (Internally
> calling SecurityUtil.getServerPrincipal(String principalConfig,String
> hostname))
>
>
>> On Jun 1, 2015, at 12:36 PM, Gour Saha <gs...@hortonworks.com> wrote:
>>
>> Have you tried using ${THIS_HOST} in appConfig? Did it not work?
>>
>> -Gour
>>
>> On 6/1/15, 9:14 AM, "Nathaniel Braun" <n.br...@criteo.com> wrote:
>>
>>> Hi everyone,
>>>
>>> We are currently working on the configuration files with Kerberos
>>> principals in them, and it turns out that the Kerberos principal is
>>> linked to the hostname, so we need it.
>>>
>>> What we would like to do is something like that:
>>>
>>>
>>> 1. In appConfig.json
>>>
>>> Set the global hostname: "site.global.hostname": "${THIS_HOST}"
>>>
>>>
>>> 2. In our default httpfs-site configuration file:
>>>
>>> Read that value using the following piece of code:
>>>
>>> <name>httpfs.authentication.kerberos.principal</name><value>HTTP/${@//site
>>> /global/hostname}</value>
>>> <name>httpfs.hadoop.authentication.kerberos.principal</name><value>HTTP/${
>>> @//site/global/hostname}</value>
>>>
>>> For this to work, we need the THIS_HOST variable to work in the
>>> appConfig.json file.
>>>
>>> How can we achieve such a feature?
>>>
>>> Thanks & regards,
>>> Nathaniel
>>>
>>
>
