Centos k8s安装的服务使用的配置一般都在/etc/systemd/system/kube-apiserver.service，修改配置完后重启apiService即可
service kube-apiserver.service restart
/etc/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target
[Service]
ExecStart=/opt/kube/bin/kube-apiserver \
--advertise-address=172.16.48.9 \
--allow-privileged=true \
--anonymous-auth=false \
--api-audiences=api,istio-ca \
--authorization-mode=Node,RBAC \
--bind-address=172.16.48.9 \
--client-ca-file=/etc/kubernetes/ssl/ca.pem \
--endpoint-reconciler-type=lease \
--etcd-cafile=/etc/kubernetes/ssl/ca.pem \
--etcd-certfile=/etc/kubernetes/ssl/kubernetes.pem \
--etcd-keyfile=/etc/kubernetes/ssl/kubernetes-key.pem \
--etcd-servers=https://172.16.48.9:2379 \
--kubelet-certificate-authority=/etc/kubernetes/ssl/ca.pem \
--kubelet-client-certificate=/etc/kubernetes/ssl/kubernetes.pem \
--kubelet-client-key=/etc/kubernetes/ssl/kubernetes-key.pem \
--secure-port=6443 \
--service-account-issuer=https://kubernetes.default.svc \
--service-account-signing-key-file=/etc/kubernetes/ssl/ca-key.pem \
--service-account-key-file=/etc/kubernetes/ssl/ca.pem \
--service-cluster-ip-range=10.68.0.0/16 \
--service-node-port-range=5000-32767 \
--tls-cert-file=/etc/kubernetes/ssl/kubernetes.pem \
--tls-private-key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
--requestheader-client-ca-file=/etc/kubernetes/ssl/ca.pem \
--requestheader-allowed-names= \
--requestheader-extra-headers-prefix=X-Remote-Extra- \
--requestheader-group-headers=X-Remote-Group \
--requestheader-username-headers=X-Remote-User \
--proxy-client-cert-file=/etc/kubernetes/ssl/aggregator-proxy.pem \
--proxy-client-key-file=/etc/kubernetes/ssl/aggregator-proxy-key.pem \
--enable-aggregator-routing=true \
--v=2
Restart=always
RestartSec=5
Type=notify
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target