error validating data: [ValidationError(Pod): unknown field "containers" in io.k8s.api.core.v1.Pod

Question

I am trying to create some sample kubernetes pod file.

cat << EOF | kubectl create -f -
apiVersion: v1
kind: Pod
metadata:
name: nginx
spec:
containers:
- name: nginx
  image: nginx
EOF

But on executing this I am getting below error.

error: error validating "pod.yaml": error validating data: [ValidationError(Pod): unknown field "containers" in io.k8s.api.core.v1.Pod, ValidationError(Pod): unknown field "na me" in io.k8s.api.core.v1.Pod]; if you choose to ignore these errors, turn validation off with --validate=false

Solution

I am not sure about the exact issue but it got resolved with proper space indentation

---
apiVersion: v1
kind: Pod
metadata:
 name: nginx
spec:
 containers:
   - name: nginx
     image: nginx

It worked for me now with proper spaces. Mybad

Comments

[Shudipta Sharma]

If the exact format you have presented in the statement is true, then I have to say that the problem is in the format. See kubernetes.io/docs/concepts/workloads/pods/pod-overview/….

[Rocky Hai]

Thanks @ShudiptaSharma. Its the issue with format. After observing the error for sometime i came to know it is clearly displaying that which fields in pod are not in right space indentation. Oberservation helps :)

[Anthon]

Both version are valid YAML documents. In your question spec is a key in the root level mapping of the YAML file and has the value null, similar containers is a key in that same mapping with as value a list with one entry. In your answer the the value for spec is a mapping which has a key containers. As Kubernetes doesn't know about a root level key containers, it throws an error.