I have an RBAC problem, but everything I test seems ok? - kubernetes

Question

This is a continuation of the problem described here (How do I fix a role-based problem when my role appears to have the correct permissions?)
I have done much more testing and still do not understand the error
Error from server (Forbidden): pods is forbidden: User "dma" cannot list resource "pods" in API group "" at the cluster scope
UPDATE: Here is another hint from the API server
watch chan error: etcdserver: mvcc: required revision has been compacted
I found this thread, but I am working in the current kubernetes
How fix this error "watch chan error: etcdserver: mvcc: required revision has been compacted"?
My user exists
NAME AGE SIGNERNAME REQUESTOR REQUESTEDDURATION CONDITION
dma 77m kubernetes.io/kube-apiserver-client kubernetes-admin <none> Approved,Issued
The clusterrole exists
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"rbac.authorization.k8s.io/v1","kind":"ClusterRole","metadata":{"annotations":{},"name":"kubelet-runtime"},"rules":[{"apiGroups":["","extensions","apps","argoproj.io","workflows.argoproj.io","events.argoproj.io","coordination.k8s.io"],"resources":["*"],"verbs":["*"]},{"apiGroups":["batch"],"resources":["jobs","cronjobs"],"verbs":["*"]}]}
creationTimestamp: "2021-12-16T00:24:56Z"
name: kubelet-runtime
resourceVersion: "296716"
uid: a4697d6e-c786-4ec9-bf3e-88e3dbfdb6d9
rules:
- apiGroups:
- ""
- extensions
- apps
- argoproj.io
- workflows.argoproj.io
- events.argoproj.io
- coordination.k8s.io
resources:
- '*'
verbs:
- '*'
- apiGroups:
- batch
resources:
- jobs
- cronjobs
verbs:
- '*'
The sandbox namespace exists
NAME STATUS AGE
sandbox Active 6d6h
My user has authority to operate in the kubelet cluster and the namespace "sandbox"
{
"apiVersion": "rbac.authorization.k8s.io/v1",
"kind": "ClusterRoleBinding",
"metadata": {
"annotations": {
"kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"rbac.authorization.k8s.io/v1\",\"kind\":\"ClusterRoleBinding\",\"metadata\":{\"annotations\":{},\"name\":\"dma-kubelet-binding\"},\"roleRef\":{\"apiGroup\":\"rbac.authorization.k8s.io\",\"kind\":\"ClusterRole\",\"name\":\"kubelet-runtime\"},\"subjects\":[{\"kind\":\"ServiceAccount\",\"name\":\"dma\",\"namespace\":\"argo\"},{\"kind\":\"ServiceAccount\",\"name\":\"dma\",\"namespace\":\"argo-events\"},{\"kind\":\"ServiceAccount\",\"name\":\"dma\",\"namespace\":\"sandbox\"}]}\n"
},
"creationTimestamp": "2021-12-16T00:25:42Z",
"name": "dma-kubelet-binding",
"resourceVersion": "371397",
"uid": "a2fb6d5b-8dba-4320-af74-71caac7bdc39"
},
"roleRef": {
"apiGroup": "rbac.authorization.k8s.io",
"kind": "ClusterRole",
"name": "kubelet-runtime"
},
"subjects": [
{
"kind": "ServiceAccount",
"name": "dma",
"namespace": "argo"
},
{
"kind": "ServiceAccount",
"name": "dma",
"namespace": "argo-events"
},
{
"kind": "ServiceAccount",
"name": "dma",
"namespace": "sandbox"
}
]
}
My user has the correct permissions
{
"apiVersion": "rbac.authorization.k8s.io/v1",
"kind": "Role",
"metadata": {
"annotations": {
"kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"rbac.authorization.k8s.io/v1\",\"kind\":\"Role\",\"metadata\":{\"annotations\":{},\"name\":\"dma\",\"namespace\":\"sandbox\"},\"rules\":[{\"apiGroups\":[\"\",\"apps\",\"autoscaling\",\"batch\",\"extensions\",\"policy\",\"rbac.authorization.k8s.io\",\"argoproj.io\",\"workflows.argoproj.io\"],\"resources\":[\"pods\",\"configmaps\",\"deployments\",\"events\",\"pods\",\"persistentvolumes\",\"persistentvolumeclaims\",\"services\",\"workflows\"],\"verbs\":[\"get\",\"list\",\"watch\",\"create\",\"update\",\"patch\",\"delete\"]}]}\n"
},
"creationTimestamp": "2021-12-21T19:41:38Z",
"name": "dma",
"namespace": "sandbox",
"resourceVersion": "1058387",
"uid": "94191881-895d-4457-9764-5db9b54cdb3f"
},
"rules": [
{
"apiGroups": [
"",
"apps",
"autoscaling",
"batch",
"extensions",
"policy",
"rbac.authorization.k8s.io",
"argoproj.io",
"workflows.argoproj.io"
],
"resources": [
"pods",
"configmaps",
"deployments",
"events",
"pods",
"persistentvolumes",
"persistentvolumeclaims",
"services",
"workflows"
],
"verbs": [
"get",
"list",
"watch",
"create",
"update",
"patch",
"delete"
]
}
]
}
My user is configured correctly on all nodes
apiVersion: v1
clusters:
- cluster:
certificate-authority-data: DATA+OMITTED
server: https://206.81.25.186:6443
name: kubernetes
contexts:
- context:
cluster: kubernetes
user: dma
name: dma#kubernetes
- context:
cluster: kubernetes
user: kubernetes-admin
name: kubernetes-admin#kubernetes
current-context: kubernetes-admin#kubernetes
kind: Config
preferences: {}
users:
- name: dma
user:
client-certificate-data: REDACTED
client-key-data: REDACTED
- name: kubernetes-admin
user:
client-certificate-data: REDACTED
client-key-data: REDACTED
Based on this website, I have been searching for a watch event.
I think have rebuilt everything above the control plane but the problem persists.
The next step would be to rebuild the entire cluster, but it would be so much more satisfying to find the actual problem.
Please help.
FIX:
So the policy for the sandbox namespace was wrong. I fixed that and the problem is gone!

Answer 1

I think finally understand RBAC (policies and all). Thank you very much to members of the Kubernetes slack channel. These policies have passed the first set of tests for a development environment ("sandbox") for Argo workflows. Still testing.
policies.yaml file:
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: dev
namespace: sandbox
rules:
- apiGroups:
- "*"
attributeRestrictions: null
resources: ["*"]
verbs:
- get
- watch
- list
- apiGroups: ["argoproj.io", "workflows.argoproj.io", "events.argoprpj.io"]
attributeRestrictions: null
resources:
- pods
- configmaps
- deployments
- events
- pods
- persistentvolumes
- persistentvolumeclaims
- services
- workflows
- eventbus
- eventsource
- sensor
verbs: ["*"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: dma-dev
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: dev
subjects:
- kind: User
name: dma
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: dma-admin
subjects:
- kind: User
name: dma
namespace: sandbox
roleRef:
kind: ClusterRole
name: cluster-admin
apiGroup: rbac.authorization.k8s.io
---
kind: NetworkPolicy
apiVersion: networking.k8s.io/v1
metadata:
name: access-nginx
namespace: sandbox
spec:
podSelector:
matchLabels:
app: nginx
ingress:
- from:
- podSelector:
matchLabels:
run: access
...