Open
Description
Description of the problem/feature request
kube-linter could be very useful, thanks for creating it!
As an alternative approach to combining multiple YAML files into one using the document start (---) and stop (...) separators, I prefer to use the List kind.
Unfortunately, this appears to be ignored by kube-linter.
Please consider supporting it.
Description of the existing behavior vs. expected behavior
Using your documentation example:
echo '
apiVersion: v1
kind: Pod
metadata:
name: security-context-demo
spec:
securityContext:
runAsUser: 1000
runAsGroup: 3000
fsGroup: 2000
volumes:
- name: sec-ctx-vol
emptyDir: {}
containers:
- name: sec-ctx-demo
image: busybox
resources:
requests:
memory: "64Mi"
cpu: "250m"
command: [ "sh", "-c", "sleep 1h" ]
volumeMounts:
- name: sec-ctx-vol
mountPath: /data/demo
securityContext:
allowPrivilegeEscalation: false
' | kube-linter lint -Yields:
KubeLinter development
{elided}
Error: found 4 lint errors
But, incorporating the Pod into a List, fails:
echo '
apiVersion: v1
kind: List
metadata: {}
list:
- apiVersion: v1
kind: Pod
metadata:
name: security-context-demo
spec:
securityContext:
runAsUser: 1000
runAsGroup: 3000
fsGroup: 2000
volumes:
- name: sec-ctx-vol
emptyDir: {}
containers:
- name: sec-ctx-demo
image: busybox
resources:
requests:
memory: "64Mi"
cpu: "250m"
command: [ "sh", "-c", "sleep 1h" ]
volumeMounts:
- name: sec-ctx-vol
mountPath: /data/demo
securityContext:
allowPrivilegeEscalation: false
' | kube-linter lint -Yields (incorrectly):
Warning: no valid objects found.
Additional context
I have various occurrences of List's in my deployments that successfully deploy using kubectl create ....
I'm unable to use these currently with kube-linter because kube-linter doesn't support List.
For example:
# Provide an Example YAML `List` with one `Deployment`, one `Service` and one `VPA`
cat example \
| kube-linter lint -Warning: no valid objects found.
# Same Example YAML but using yq to extract the `Deployment`
cat example.yaml \
| yq '.items[0]' \
| kube-linter lint -KubeLinter development
Error: found 4 lint errors
# Same Example YAML but using yq to extract the `Service`
cat example.yaml \
| yq '.items[1]' \
| kube-linter lint -KubeLinter development
Error: found 1 lint errors