kubernetes-incubator/client-python picking up wrong host when used under Jupyter.(OK from cmdline)

[Michael Bright]

Here's a question I asked just now in the kubernetes-sig-apps group, but as it's Jupyter related, maybe someone here has an idea ...

I tried using kubernetes-incubator/client-python from within Jupyter.and was unable to get a *very* simple example working.

I'm running kubernetes (client-python v 2.0.0), Minikube v0.19, Anaconda Python 4.3.17, Python 3.6.1, Jupyter notebook 5.0.

When I run the following example from the command-line, it works fine:(yes it's using the same version of Anaconda Python)

    from kubernetes import client, config

    config.load_kube_config()

    v1 = client.CoreV1Api()

    print(v1.list_namespace())

When I run the example from within Jupyter I get connection refused.

It seems that v1.api_client.host is set to

    192.168.99.100:8443 when run from the command-line

    127.0.0.1:8080          when run from Jupyter

After several hours of playing with this I now have a workaround which is to run

    kubectl proxy --port=8080

in another terminal.

I'd really like to avoid that workaround so that my notebook is self contained.

As far as I can tell my shell ernvironment is identical between Jupyter and the command-line.

Any idea what I need to do to fix this?

[Michael Bright]

I tried opening a terminal from Jupyter and running my example from the command-line there - this works fine also.

[Yuvi Panda]

What does running:

```
import os
os.path.expanduser('~/.kube/config')
```

give you from inside Jupyter? That's similar to what load_kube_config
is using, and if that doesn't work load_kube_config won't either...

Can you also try explicitly specifying the path to kube/config - like
`config.load_kube_config('full-path-to-kube-.config-file')`?

Also am curious, what're you doing with the kubernetes API in a
Jupyter notebook? I do a lot of work around Kubernetes + Jupyter so
curious :)

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--
Yuvi Panda T
http://yuvi.in/blog

[Michael Bright]

Hi Yuri,

It expands to /home/mjb/.kube/config as I expect.

Thx,

Mike.

[Yuvi Panda]

Did you try the second suggestion?

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[Michael Bright]

Hi Yuri,

Yes, I tried explicitly calling

    config.load_kube_config('/home/mjb/.kube/config')

but this doesn't seem to have effect (?!), afterward  api_client.host is set to http://127.0.0.1:8080 which is not the value in 'home/mjb/.kube/config'

$ grep server /home/mjb/.kube/config 

    server: https://192.168.99.100:8443

    client-certificate: /home/mjb/.minikube/apiserver.crt

    client-key: /home/mjb/.minikube/apiserver.key

I get the answer I expect from the command-line:

To answer your other question, myself and Haikel Guemar are running a Container Orchestration lab at PyCon this week, doing some Docker Swarm, Kubernetes and Mesos respectively via command-line and via Python (of course!).

Regards,

Mike.

On 14 May 2017 at 09:42, Yuvi Panda <yuvi...@gmail.com> wrote:

Did you try the second suggestion?

On Sun, May 14, 2017 at 12:40 AM, Michael Bright <mjbri...@gmail.com> wrote:
>
> Hi Yuri,
>
> It expands to /home/mjb/.kube/config as I expect.
>
> Thx,
> Mike.
>
> On 14 May 2017 at 09:17, Yuvi Panda <yuvi...@gmail.com> wrote:
>>
>> import os
>> os.path.expanduser('~/.kube/config')
>
>
>
>
>

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>
> For more options, visit https://groups.google.com/d/optout.



--
Yuvi Panda T
http://yuvi.in/blog

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[Michael Bright]

Just to close on this, the problem just went away after a notebook shutdown/restart - I don't know why.

I actually restarted the notebook (not Jupyter itself) to be able to reproduce the problem before trying a suggestion from Sebastien Goasguen (to have Juoyter listen on 0.0.0.0)

On Sunday, May 14, 2017 at 6:05:06 AM UTC+2, Michael Bright wrote: