问题
I am having k8s cluster on centos7.2 with 1 master and 2 slaves. The cluster is working fine as far as it is serving on port 8080 but when I tries to secure Kube-API server by using certificates, I felt into the above error after restarting the kube-apiserver service and it is continuously writing this error in my log file at /var/log/messages.
kube-apiserver is started as-
KUBE_API_ADDRESS="--bind-address=0.0.0.0"
KUBE_API_PORT="--secure-port=6443"
KUBELET_PORT="--kubelet-port=10250"
KUBE_ETCD_SERVERS="--etcd-servers=http://kube-master:2379"
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"
KUBE_ALLOW_PRIV="--allow-privileged=true"
KUBE_API_TLS_CERT_FILE="--tls-cert-file=/home/abc/server.cert"
KUBE_API_TLS_PRIVATE_KEY_FILE="--tls-private-key- file=/home/abc/server.key"
KUBE_API_TOKEN_AUTH_FILE="--token-auth-file=/home/abc/token.csv" </br>
I am accessing API server using kubectl command as
kubectl --v=4 --server="https://$ip:6443" --certificate-authority="./ca.crt" --token="abcdTOKEN1234" get nodes
After that I am getting following error-
2930 helpers.go:153] Connection error: Get https://$ip:6443/api: x509: certificate signed by unknown authority
2930 helpers.go:96] Unable to connect to the server: x509: certificate signed by unknown authority
I performed same steps on ubuntu 14.04 and are working fine. I am not able to figure out where exactly I'm missing. Can anyone knows where I am wrong ? Thanks in advance.
来源：https://stackoverflow.com/questions/37239795/http-tls-handshake-error-from-ipport-remote-error-bad-certificate