Gitlab Yaml for Rancher Server 2.0

gitlabaccount.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: gitlab-managed-apps
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: gitlab-sa
  namespace: gitlab-managed-apps 
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: gitlab-role
  namespace: gitlab-managed-apps
rules:
- apiGroups:
  - ""
  - extensions
  resources:
  - '*'
  verbs:
  - '*'
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: gitlab-rb
  namespace: gitlab-managed-apps
subjects:
  - kind: ServiceAccount
    name: gitlab-sa
    namespace: gitlab-managed-apps
roleRef:
  kind: Role
  name: gitlab-role
  apiGroup: rbac.authorization.k8s.io
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: gitlab-cluster
  namespace: gitlab-managed-apps
subjects:
  - kind: ServiceAccount
    name: default
    namespace: gitlab-managed-apps
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: v1
kind: Secret
metadata:
  name: gitlab-secret
  namespace: gitlab-managed-apps
  annotations: 
    kubernetes.io/service-account.name: gitlab-sa
type: kubernetes.io/service-account-token

Is this file still valid?

Trying to follow the steps on https://www.youtube.com/watch?v=efh76mKwyIc but Gitlab says gitlab-managed-apps is a reserved namespace when adding the kubernetes cluster to my Gitlab project.

Proper role binding:

apiVersion: v1 
kind: ServiceAccount 
metadata: 
  name: gitlab 
  namespace: default 
--- 
kind: ClusterRoleBinding 
apiVersion: rbac.authorization.k8s.io/v1beta1 
metadata: 
  name: gitlab-admin 
  namespace: default 
subjects: 
  - kind: ServiceAccount 
    name: gitlab 
    namespace: default 
roleRef: 
  kind: ClusterRole 
  name: cluster-admin 
  apiGroup: rbac.authorization.k8s.io 
--- 
apiVersion: v1 
kind: Secret 
metadata: 
  name: gitlab-token 
  namespace: default 
  annotations: 
    kubernetes.io/service-account.name: gitlab 
type: kubernetes.io/service-account-token