kubernetes client corev1api connect_get_namespaced_pod_exec fails to run for python.
I have checked the python version == 2.7 and pip freeze - ipaddress==1.0.22, urllib3==1.24.1 and websocket-client==0.54.0 are the versions which satisfy the requirement - as mentioned here: https://github.com/kubernetes-client/python/blob/master/README.md#hostname-doesnt-match followed the issue on this thread - https://github.com/kubernetes-client/python/issues/36 - not much help.
Tried usings stream as suggested here - https://github.com/kubernetes-client/python/blob/master/examples/exec.py
Ran:
api_response = stream(core_v1_api.connect_get_namespaced_pod_exec,
name, namespace,
command=exec_command,
stderr=True, stdin=False,
stdout=True, tty=False)Got this error:
ApiException: (0) Reason: hostname '10.47.7.95' doesn't match either of '', 'cluster.local'
Without stream using directly the CoreV1Api -
Ran :
core_v1_api = client.CoreV1Api()
api_response = core_v1_api.connect_get_namespaced_pod_exec(name=name,namespace=namespace,command=exec_command,stderr=True, stdin=False,stdout=True, tty=False)Got this error:
ApiException: (400) Reason: Bad Request HTTP response headers: HTTPHeaderDict({'Date': 'Sat, 05 Jan 2019 08:01:22 GMT', 'Content-Length': '139', 'Content-Type': 'application/json'}) HTTP response body: {"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"Upgrade request required","reason":"BadRequest","code":400}
I wrote a simple program to check that:
from kubernetes import client, config
from kubernetes.stream import stream
# create an instance of the API class
config.load_kube_config()
api_instance = client.CoreV1Api()
exec_command = [
'/bin/sh',
'-c',
'echo This is Prafull Ladha and it is test function']
resp = stream(api_instance.connect_get_namespaced_pod_exec, "nginx-deployment-76bf4969df-467z2", 'default',
command=exec_command,
stderr=True, stdin=False,
stdout=True, tty=False)
print("Response: " + resp)It is working perfectly fine for me.
I believe you're using minikube for development purpose. It is not able to recognise your hostname. You can make it work by disabling assert_hostname in your program like:
from kubernetes.client import configuration
config.load_kube_config()
configuration.assert_hostname = FalseThis should resolve your issue.