no config file found: If installed by kubeadm

[gangadhars]

I have install kubernetes by using kubeadm (http://kubernetes.io/docs/getting-started-guides/kubeadm/).
I didn't find any config file.

Thanks

[ericharnold]

The kubeconfig file you are looking for is at /etc/kubernetes/admin.conf on the kubectl master node. You need to sudo to see this file. I copied this file to my user space at /home/myuser/admin.conf, did a chown to my user, and then scp'd the file to my app's git repo. Then I was able to access the kubectl master node remotely via pykube using the credentials in the admin.conf file

api = pykube.HTTPClient(pykube.KubeConfig.from_file("/home/myuser/git/myproject/kubectl/config/mycluster/admin.conf"))

[gangadhars]

Hi ericharnold!

I found the admin.conf file but I'm getting below error:

Traceback (most recent call last):
  File "ns.py", line 6, in <module>
    namespaces = filter(operator.attrgetter("name"), response)
  File "/usr/local/lib/python2.7/dist-packages/pykube/query.py", line 130, in __iter__
    return iter(self.query_cache["objects"])
  File "/usr/local/lib/python2.7/dist-packages/pykube/query.py", line 120, in query_cache
    cache["response"] = self.execute().json()
  File "/usr/local/lib/python2.7/dist-packages/pykube/query.py", line 104, in execute
    r = self.api.get(**kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pykube/http.py", line 127, in get
    return self.session.get(*args, **self.get_kwargs(**kwargs))
  File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 501, in get
    return self.request('GET', url, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 488, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 609, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/adapters.py", line 497, in send
    raise SSLError(e, request=request)
requests.exceptions.SSLError: hostname '172.16.2.120' doesn't match either of 'kubernetes', 'kubernetes.default', 'kubernetes.default.svc', 'kubernetes.default.svc.cluster.local', '172.16.2.120', '10.96.0.1'

Thanks

[ericharnold]

You may have SSL cert issues based on the hostnames you assigned to your nodes before you deployed kubeadm for the first time. We found that we had to assign fully qualified hostnames in Ubuntu in the cluster.local domain before we installed kubeadm. For example we set hostnames to node1.cluster.local, node2.cluster.local, etc. This includes updating both the /etc/hostname and /etc/hosts files using this name. Then we installed kubeadm init and kubeadm join and all the K8s nodes now have the fully qualified hostname when you display kubectl get nodes. This was also necessary to find the pod logs in the Kubernetes dashboard web interface. It seems that kube-dns depends on this.

[wsbmilk]

use insecure_url for kube-apiserver OR use kubectl proxy may resolve it.