About k8s deployment error resolution

• Error message

Warning  FailedCreatePodSandBox  89s               kubelet            Failed to create pod sandbox: rpc error: code = Unknown desc = [failed to set up sandbox container "1c97ad2710e2939c0591477f9d6dde8e0d7d31b3fbc138a7fa38aaa657566a9a" network for pod "coredns-7f89b7bc75-qg924": networkPlugin cni failed to set up pod "coredns-7f89b7bc75-qg924_kube-system" network: error getting ClusterInformation: Get "https://[10.96.0.1]:443/apis/crd.projectcalico.org/v1/clusterinformations/default": x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernetes"), failed to clean up sandbox container "1c97ad2710e2939c0591477f9d6dde8e0d7d31b3fbc138a7fa38aaa657566a9a" network for pod "coredns-7f89b7bc75-qg924": networkPlugin cni failed to teardown pod "coredns-7f89b7bc75-qg924_kube-system" network: error getting ClusterInformation: Get "https://[10.96.0.1]:443/apis/crd.projectcalico.org/v1/clusterinformations/default": x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernetes")]

• Performance status

[root@linux03 ~]# kubectl get pods -n kube-system
NAME                              READY   STATUS              RESTARTS   AGE
coredns-7f89b7bc75-jzs26          0/1     ContainerCreating   0          63s
coredns-7f89b7bc75-qg924          0/1     ContainerCreating   0          63s

# coredns cannot run

• Change calico.yaml

# Cluster type to identify the deployment type
  - name: CLUSTER_TYPE
  value: "k8s,bgp"
# New below
  - name: IP_AUTODETECTION_METHOD
    value: "interface=ens192"
    # ens192 is the local NIC name

• kubectl apply -f calico.yaml
• Check that it is running

[root@linux03 ~]# kubectl get pods -n kube-system
NAME                                       READY   STATUS    RESTARTS   AGE
calico-kube-controllers-69496d8b75-2nm5k   1/1     Running   0          23m
calico-node-8wfk9                          1/1     Running   0          23m
calico-node-9vn4v                          1/1     Running   0          23m
calico-node-qm8s2                          1/1     Running   0          23m
coredns-7f89b7bc75-jzs26                   1/1     Running   0          26m
coredns-7f89b7bc75-qg924                   1/1     Running   0          26m
etcd-linux03                               1/1     Running   0          26m
kube-apiserver-linux03                     1/1     Running   0          26m
kube-controller-manager-linux03            1/1     Running   0          26m
kube-proxy-29lcf                           1/1     Running   0          25m
kube-proxy-c29wz                           1/1     Running   0          26m
kube-proxy-lpgrr                           1/1     Running   0          25m
kube-scheduler-linux03                     1/1     Running   0          26m