kube-apiserver/etcd-controlplane ca 설명

journalctl -u etcd.service

 

kubectl logs etcd-master

 

 

 

[kube-apiserver.yaml]

  - command:
    - kube-apiserver
    - --advertise-address=172.17.0.10
 
    - --client-ca-file=/etc/kubernetes/pki/ca.crt

    - --etcd-cafile=/etc/kubernetes/pki/etcd/ca.crt
    - --etcd-certfile=/etc/kubernetes/pki/apiserver-etcd-client.crt
    - --etcd-keyfile=/etc/kubernetes/pki/apiserver-etcd-client.key
    - --etcd-servers=https://127.0.0.1:2379

    - --kubelet-client-certificate=/etc/kubernetes/pki/apiserver-kubelet-client.crt
    - --kubelet-client-key=/etc/kubernetes/pki/apiserver-kubelet-client.key
    - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
    
    - --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.crt
    - --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client.key
    
    - --requestheader-allowed-names=front-proxy-client
    - --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.crt
    - --requestheader-extra-headers-prefix=X-Remote-Extra-
    - --requestheader-group-headers=X-Remote-Group
    - --requestheader-username-headers=X-Remote-User
    - --secure-port=6443
    
    - --service-account-key-file=/etc/kubernetes/pki/sa.pub
    - --service-cluster-ip-range=10.96.0.0/12
    
    - --tls-cert-file=/etc/kubernetes/pki/apiserver.crt
    - --tls-private-key-file=/etc/kubernetes/pki/apiserver.key

• ca.crt, ca.key - Kubernetes Certificate Authority
• apiserver.crt, apiserver.key - API 서버 인증서
• apiserver-kubelet-client.crt, apiserver-kubelet-client.key API 서버가 kubelet에 안전하게 연결하는데 사용하는 클라이언트 인증서
• sa.pub, sa.key - ServiceAccount에 서명할 때 Controller Manager가 사용하는 Key

 ㅁ kube-api-server certificate file 

 --tls-cert-file=/etc/kubernetes/pki/apiserver.crt

 

ㅁ the Certificate file used to authenticate kube-apiserver as a client to ETCD Server (kube-apiserver를 ETCD 서버에 대한 클라이언트로 인증하는 데 사용되는 인증서 파일)

--etcd-certfile=/etc/kubernetes/pki/apiserver-etcd-client.crt

        

 ㅁ The key used to authenticate kubeapi-server to the kubelet server

-- kubelet-client-key=/etc/kubernetes/pki/apiserver-kubelet-client.key