kuberenetes 升级后新加入节点报错

[preflight] running pre-flight checks
    [WARNING RequiredIPVSKernelModulesAvailable]: the IPVS proxier will not be used, because the following required kernel modules are not loaded: [ip_vs_sh ip_vs ip_vs_rr ip_vs_wrr] or no builtin kernel ipvs support: map[ip_vs_rr:{} ip_vs_wrr:{} ip_vs_sh:{} nf_conntrack_ipv4:{} ip_vs:{}]
you can solve this problem with following methods:
 1. Run 'modprobe -- ' to load missing kernel modules;
2. Provide the missing builtin kernel ipvs support

[discovery] Trying to connect to API Server "172.19.170.254:6443"
[discovery] Created cluster-info discovery client, requesting info from "https://172.19.170.254:6443"
[discovery] Requesting info from "https://172.19.170.254:6443" again to validate TLS against the pinned public key
[discovery] Cluster info signature and contents are valid and TLS certificate validates against pinned roots, will use API Server "172.19.170.254:6443"
[discovery] Successfully established connection with API Server "172.19.170.254:6443"
[kubelet] Downloading configuration for the kubelet from the "kubelet-config-1.12" ConfigMap in the kube-system namespace
configmaps "kubelet-config-1.12" is forbidden: User "system:bootstrap:y1zgt7" cannot get configmaps in the namespace "kube-system"

$ kubectl get cm --all-namespaces
$ kubectl -n kube-system get cm kubelet-config-1.11 -o yaml --export > kubelet-config-1.12-cm.yaml
$ vim kubelet-config-1.12-cm.yaml       #modify at the bottom:
                                        #name: kubelet-config-1.12
                                        #delete selfLink
$ kubectl -n kube-system create -f kubelet-config-1.12-cm.yaml

$ kubeadm token list           #if no output, then create a token:
$ kubeadm token create
TOKEN                       ...     ...
a0b1c2.svn4my9ifft4zxgg     ...     ...
# Token prefix is "a0b1c2"

$ kubectl get roles --all-namespaces
$ kubectl -n kube-system get role kubeadm:kubelet-config-1.11 -o yaml > kubeadm:kubelet-config-1.12-role.yaml
$ vim kubeadm\:kubelet-config-1.12-role.yaml    #modify the following:
                                                #name: kubeadm:kubelet-config-1.12
                                                #resourceNames: kubelet-config-1.12
                                                #delete creationTimestamp, resourceVersion, selfLink, uid (because --export option is not supported)    
$ kubectl -n kube-system create -f kubeadm\:kubelet-config-1.12-role.yaml

$ kubectl get rolebindings --all-namespaces
$ kubectl -n kube-system get rolebinding kubeadm:kubelet-config-1.11 -o yaml > kubeadm:kubelet-config-1.12-rolebinding.yaml
$ vim kubeadm\:kubelet-config-1.12-rolebinding.yaml     #modify the following:
                                                            #metadata/name: kubeadm:kubelet-config-1.12
                                                            #roleRef/name: kubeadm:kubelet-config-1.12
                                                            #delete creationTimestamp, resourceVersion, selfLink, uid (because --export option is not supported)
- apiGroup: rbac.authorization.k8s.io                       #add these 3 lines as another group in "subjects:" at the bottom, with the 6 character token prefix from STEP 2
  kind: Group
  name: system:bootstrap:a0b1c2 
$ kubectl -n kube-system create -f kubeadm\:kubelet-config-1.12-rolebinding.yaml

$ sudo kubeadm join --token <token> <master-IP>:6443 --discovery-token-ca-cert-hash sha256:<key-value> 
# If you receive 2 ERRORS, run kubeadm join again with the following options:
$ sudo kubeadm join --token <token> <master-IP>:6443 --discovery-token-ca-cert-hash sha256:<key-value> --ignore-preflight-errors=FileAvailable--etc-kubernetes-bootstrap-kubelet.conf,FileAvailable--etc-kubernetes-pki-ca.crt