kubectl create from inside pod - docker

Question

I have a running jenkins pod and i am trying to execute following commands:
sudo kubectl --kubeconfig /opt/jenkins_home/admin.conf apply -f /opt/jenkins_home/ab-kubernetes/ab-back.yml
It is giving following error:
Error from server (NotFound): the server could not find the requested resource
What cound go wrong here?
ab-back.yml file
---
apiVersion: v1
kind: Service
metadata:
name: dg-back-svc
spec:
selector:
app: dg-core-backend-d
type: NodePort
ports:
- name: http
protocol: TCP
port: 8081
nodePort: 30003
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: dg-core-backend-d
spec:
replicas: 1
template:
metadata:
labels:
app: dg-core-backend-d
spec:
containers:
- name: dg-core-java
image: ab/dg-springboot-java:1.0
imagePullPolicy: IfNotPresent
command: ["sh"]
args: ["-c", "/root/post-deployment.sh"]
ports:
- containerPort: 8081
# livenessProbe:
# httpGet:
# path: /
# port: 8080
env:
- name: SPRING_PROFILES_ACTIVE
value: xxx
UPDATE:
kubectl version is as follows :
Client Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.0", GitCommit:"91e7b4fd31fcd3d5f436da26c980becec37ceefe", GitTreeState:"clean", BuildDate:"2018-06-27T20:17:28Z", GoVersion:"go1.10.2", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"6", GitVersion:"v1.6.0", GitCommit:"fff5156092b56e6bd60fff75aad4dc9de6b6ef37", GitTreeState:"clean", BuildDate:"2017-03-28T16:24:30Z", GoVersion:"go1.7.5", Compiler:"gc", Platform:"linux/amd64"}
On applying logs as --v=4,kubectl apply is working and giving logs as follows :
I0702 11:40:17.721604 1601 merged_client_builder.go:159] Using in-cluster namespace
I0702 11:40:17.734648 1601 decoder.go:224] decoding stream as YAML
service/dg-back-svc created
deployment.extensions/dg-core-backend-d created
but kubectl create is giving error as :
I0702 11:41:12.265490 1631 helpers.go:201] server response object: [{
"metadata": {},
"status": "Failure",
"message": "the server could not find the requested resource",
"reason": "NotFound",
"details": {
"causes": [
{
"reason": "UnexpectedServerResponse",
"message": "unknown"
}
]
},
"code": 404
}]
Also on doing kubectl get pods --v=10,it is giving log as :
Response Body: {
"metadata": {},
"status": "Failure",
"message": "only the following media types are accepted: application/json, application/yaml, application/vnd.kubernetes.protobuf",
"reason": "NotAcceptable",
"code": 406
}
I0702 12:34:27.542564 2514 request.go:1099] body was not decodable (unable to check for Status): Object 'Kind' is missing in '{
"metadata": {},
"status": "Failure",
"message": "only the following media types are accepted: application/json, application/yaml, application/vnd.kubernetes.protobuf",
"reason": "NotAcceptable",
"code": 406
}'
No resources found.
I0702 12:34:27.542813 2514 helpers.go:201] server response object: [{
"metadata": {},
"status": "Failure",
"message": "unknown (get pods)",
"reason": "NotAcceptable",
"details": {
"kind": "pods",
"causes": [
{
"reason": "UnexpectedServerResponse",
"message": "unknown"
}
]
},
"code": 406
}]

Answer 1

The problem is in versions, try to use the old version of the client or upgrade the server. kubectl supports one version forward and backward skew:
From documentation
a client should be skewed no more than one minor version from the
master, but may lead the master by up to one minor version. For
example, a v1.3 master should work with v1.1, v1.2, and v1.3 nodes,
and should work with v1.2, v1.3, and v1.4 clients.

Answer 2

Kubernetes server doesnt have this extensions/v1beta1 this resources. thats the reason why you cannot create dg-core-backend-d
You can check this by typing kubectl api-versions