Hi,
Thanks for the reply..
I managed to do it as per Rodrigo's recommendation
1- I loaded the configmaps into different paths by using HostName
2- I read the values from the paths before starting the image as following:
- command:
- sh
- -exc
- |
export KAFKA_EXT_HOST=`cat /opt/data/shared/$HOSTNAME` && \
export
KAFKA_ADVERTISED_LISTENERS=INSIDE://$(POD_IP):9092,OUTSIDE://$KAFKA_EXT_HOST:9094
&& \
start-kafka.sh
Thanks again and have a good day
On Sunday, August 19, 2018 at 3:11:34 AM UTC-4, Niranjan Kolly wrote:
>
> Use hostpath directory mount if you have more than one config file for
> each env.. and use node antiaffinity.
>
>
> Thanks,
> Niranjan
>
> On Sat, Aug 18, 2018, 7:41 AM Rodrigo Campos <[email protected]
> <javascript:>> wrote:
>
>> On Friday, August 17, 2018, ilter P <[email protected] <javascript:>>
>> wrote:
>>
>>> Hi Rodrigo,
>>>
>>> Thanks for the reply
>>> First of all this is stable external image and I dont want to maintain
>>> my version.
>>> Secondly, the values that I would like to get are created during my
>>> deployment (ingress external host urls) and I can only map them during
>>> container initializing.
>>>
>>> What i tried in 1st option is trying to create environment variable with
>>> the value of executing the command $(eval cat <PATH>)
>>>
>>> Here is the block I am trying in statefulset
>>> - name: KAFKA_ADVERTISED_LISTENERS
>>> value: INSIDE://$(POD_IP):9092,OUTSIDE://$(eval cat
>>> /opt/conf/ext-url):9093
>>>
>>>
>> So, it's the $(pod_ip) part working?
>> If so, why not have the file /opt/conf/ext-url be an env var? Is that
>> file coming from a configMap volume? Or how is it created?
>>
>>
>>> And ext-url is mounted via dynamic configMaps
>>> - name: cm-vol
>>> configMap:
>>> name: kafka-0
>>> items:
>>> - key: kafka-ext-host
>>> path: ext-host
>>>
>>
>> Why not use an env variable from the configMap? If that is what you want
>> in an env var, you can just have it. Instead of using it as a volume, use
>> it as an env var.
>>
>> What am I missing?
>>
>>
>>>
>>> Note: I went to this direction after observing that reading from dynamic
>>> configMap is not working
>>> valueFrom:
>>> configMapKeyRef:
>>> key: kafka-ext-host
>>> name: $(POD_NAME) . --> Kubernetes giving error to here
>>>
>>
>> Yeah, that won't work
>>
>>
>>>
>>> So the question is that, can I use "cat <PATH>" command to environment
>>> variable ?
>>>
>>
>> Not as part of the yaml. But if you have it mounted as the item you want,
>> you may just have it as an env var.
>>
>> And if it's not the case, the hack I mentioned in my previous mail I
>> think should work.
>>
>>
>>>
>>> I hope it is little bit clear now :) Sorry for the mess
>>>
>>
>> Thanks!
>>
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