kubernetes配備-kube-api

kube-apiコンポーネントの配備

Node、すなわちcontrollerノードにapiサービスを導入

k 8 s証明書の生成

apiに接続するための証明書

mkdir /data/ssl/k8s
cd /data/ssl/k8s

vim  k8s-ssl.sh
# cat ca-config.json
cat > ca-config.json << EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

# cat ca-csr.json
cat > ca-csr.json << EOF
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

# server-csr.json
cat > server-csr.json << EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "10.167.130.205",
      "kubernetes",
      "kubernetes.default",
      "kubernetes.default.svc",
      "kubernetes.default.svc.cluster",
      "kubernetes.default.svc.cluster.local"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server

# cat kube-proxy-csr.json
cat > kube-proxy-csr.json << EOF
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy

sh k8s-ssl.sh

ls *pem
ca-key.pem  ca.pem  kube-proxy-key.pem  kube-proxy.pem  server-key.pem  server.pem

cp /data/ssl/k8s/*pem /opt/kubernetes/ssl/

パッケージのインストールをダウンロード

https://github.com/kubernetes/kubernetes/

cd /data/src
tar zxvf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin/
cp kube-apiserver kube-scheduler kube-controller-manager kubectl /opt/kubernetes/bin

tokenファイルの追加

tokenファイルは後でnode 1 node 2としてapi申請証明書として使用されます.

vim /opt/kubernetes/cfg/token.csv
a94c6c11f24690b71065cb73647f2702,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
   ：     ，          head -c 16 /dev/urandom | od -An -t x | tr -d ' '   
   ：   
   ：UID
   ：   

kube-apiのプロファイルの作成

vim /opt/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://10.167.130.205:2379,https://10.167.130.206:2379,https://10.167.130.210:2379 \
--bind-address=10.167.130.205 \
--secure-port=6443 \
--advertise-address=10.167.130.205 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth \
--token-auth-file=/opt/kubernetes/cfg/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/opt/kubernetes/ssl/server.pem  \
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \
--client-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/opt/etcd/ssl/ca.pem \
--etcd-certfile=/opt/etcd/ssl/server.pem \
--etcd-keyfile=/opt/etcd/ssl/server-key.pem"


* --logtostderr     
* ---v     
* --etcd-servers etcd    
* --bind-address     
* --secure-port https    
* --advertise-address       
* --allow-privileged     
* --service-cluster-ip-range Service  IP   
* --enable-admission-plugins       
* --authorization-mode     ，  RBAC        
* --enable-bootstrap-token-auth   TLS bootstrap  ，     
* --token-auth-file token  
* --service-node-port-range Service Node          

kube-apiのサービスファイルの作成

vim /usr/lib/systemd/system/kube-apiserver.service

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-apiserver
ExecStart=/opt/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

systemctl daemon-reload
systemctl enable kube-apiserver
systemctl restart kube-apiserver