kubectl apply -f kanali/hack/helm-rbac.yaml fails

[artworkad]

Hey guys,

I just wanted to try out kanali on a fresh kubernetes cluster:

kubectl apply -f kanali/hack/helm-rbac.yaml

However I get following error message:

serviceaccount "tiller" created Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply clusterrolebinding.rbac.authorization.k8s.io "tiller" created Error from server (Forbidden): error when applying patch: {"metadata":{"annotations":{"kubectl.kubernetes.io/last-applied-configuration":"{"apiVersion":"rbac.authorization.k8s.io/v1","kind":"ClusterRole","metadata":{"annotations":{},"name":"cluster-admin","namespace":""},"rules":[{"apiGroups":[""],"resources":[""],"verbs":[""]},{"nonResourceURLs":[""],"verbs":[""]}]}\n"},"namespace":""}} to: &{0xc4208c00c0 0xc42034bf80 cluster-admin kanali/hack/helm-rbac.yaml 0xc42009c000 26 false} for: "kanali/hack/helm-rbac.yaml": clusterroles.rbac.authorization.k8s.io "cluster-admin" is forbidden: attempt to grant extra privileges: [PolicyRule{Resources:[""], APIGroups:[""], Verbs:[""]} PolicyRule{NonResourceURLs:[""], Verbs:[""]}] user=&{[email protected] [system:authenticated] map[]} ownerrules=[PolicyRule{Resources:["selfsubjectaccessreviews"], APIGroups:["authorization.k8s.io"], Verbs:["create"]} PolicyRule{NonResourceURLs:["/api" "/api/" "/apis" "/apis/" "/healthz" "/swagger-2.0.0.pb-v1" "/swagger.json" "/swaggerapi" "/swaggerapi/*" "/version"], Verbs:["get"]}] ruleResolutionErrors=[]

[frankgreco]

@artjomzab

Are you experiencing this on Minikube or another environment? What version of Kubernetes are you using? (kubectl version)

[artworkad]

@frankgreco I am experiencing this in the google cloud on kubernetes version 1.8.10-gke.0

[frankgreco]

@artjomzab

After doing a little research I found this issue.

Because of the way Container Engine checks permissions when you create a Role or ClusterRole, you must first create a RoleBinding that grants you all of the permissions included in the role you want to create.

An example workaround is to create a RoleBinding that gives your Google identity a cluster-admin role before attempting to create additional Role or ClusterRole permissions.

This is a known issue in the Beta release of Role-Based Access Control in Kubernetes and Container Engine version 1.6.

They go on to say that in order to proceed without error, cluster-admin role should be added to current executing user. They provided this example:

$ kubectl create clusterrolebinding your-user-cluster-admin-binding --clusterrole=cluster-admin [email protected]

It is important to note that helm-rbac.yaml provides an excessive amount of permissions as it was intended to be used in a local/test environment. You will probably want to customize your own rbac policy for Helm. Here are some recommendations from Helm.