problem description

create bootstrap role to give permission to connect apiserver request signature error, modified as follows:

[root@localhost kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap –clusterrole=system:node-bootstrapper –user=kubelet-bootstrap
Error from server (AlreadyExists): Clusterrolebindings, rbac authorization. K8s. IO “kubelet – the bootstrap” already exists

problem analysis

this is because an incorrect signature has been created previously, the signature is occupied, and the occupied signature

problem solved

1. Delete signature

kubectl delete clusterrolebindings kubelet-bootstrap

2, recreate successfully

[root@localhost kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap –clusterrole=system:node-bootstrapper –user=kubelet-bootstrap
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created