6.2 kube-apiserver

1.创建 kubernetes 证书和私钥

cat > kubernetes-csr.json <<EOF
{
  "CN": "kubernetes",
  "hosts": [
    "127.0.0.1",
    "172.17.13.204",
    "172.17.13.205",
    "172.17.13.202",
    "${CLUSTER_KUBERNETES_SVC_IP}",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "4Paradigm"
    }
  ]
}
EOF

2.生成及分发证书

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

ls kubernetes*pem

分发

for node_ip in ${NODE_IPS[@]}
  do
    echo ">>> ${node_ip}"
    ssh root@${node_ip} "mkdir -p /etc/kubernetes/cert/"
    scp kubernetes*.pem root@${node_ip}:/etc/kubernetes/cert/
  done

3.创建加密配置文件

cat > encryption-config.yaml <<EOF
kind: EncryptionConfig
apiVersion: v1
resources:
  - resources:
      - secrets
    providers:
      - aescbc:
          keys:
            - name: key1
              secret: ${ENCRYPTION_KEY}
      - identity: {}
EOF

分发

for node_ip in ${NODE_IPS[@]}
  do
    echo ">>> ${node_ip}"
    scp encryption-config.yaml root@${node_ip}:/etc/kubernetes/
  done

4.启动kube-apiserver(标红部分是metrics-server插件相关配置，暂时忽略等生成metrics证书后再配置)
a.kube-apiserver systemd unti模板

cat > kube-apiserver.service.template <<EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target

[Service]
ExecStart=/opt/k8s/bin/kube-apiserver \
  --enable-admission-plugins=Initializers,NamespaceLifecycle,NodeRestriction,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota \
  --anonymous-auth=false \
  --experimental-encryption-provider-config=/etc/kubernetes/encryption-config.yaml \
  --advertise-address=##NODE_IP## \
  --bind-address=##NODE_IP## \
  --insecure-port=0 \
  --authorization-mode=Node,RBAC \
  --runtime-config=api/all \
  --enable-bootstrap-token-auth \
  --service-cluster-ip-range=${SERVICE_CIDR} \
  --service-node-port-range=${NODE_PORT_RANGE} \
  --tls-cert-file=/etc/kubernetes/cert/kubernetes.pem \
  --tls-private-key-file=/etc/kubernetes/cert/kubernetes-key.pem \
  --client-ca-file=/etc/kubernetes/cert/ca.pem \
  --kubelet-client-certificate=/etc/kubernetes/cert/kubernetes.pem \
  --kubelet-client-key=/etc/kubernetes/cert/kubernetes-key.pem \
  --service-account-key-file=/etc/kubernetes/cert/ca-key.pem \
  --etcd-cafile=/etc/kubernetes/cert/ca.pem \
  --etcd-certfile=/etc/kubernetes/cert/kubernetes.pem \
  --etcd-keyfile=/etc/kubernetes/cert/kubernetes-key.pem \
  --etcd-servers=${ETCD_ENDPOINTS} \
  --requestheader-client-ca-file=/etc/kubernetes/cert/ca.pem \
  --requestheader-allowed-names=aggregator \
  --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/cert/metrics-server.pem \
  --proxy-client-key-file=/etc/kubernetes/cert/metrics-server-key.pem \
  --runtime-config=api/all=true \
  --enable-swagger-ui=true \
  --allow-privileged=true \
  --apiserver-count=3 \
  --audit-log-maxage=30 \
  --audit-log-maxbackup=3 \
  --audit-log-maxsize=100 \
  --audit-log-path=/var/log/kube-apiserver-audit.log \
  --event-ttl=1h \
  --alsologtostderr=true \
  --logtostderr=false \
  --log-dir=/var/log/kubernetes \
  --v=2
Restart=on-failure
RestartSec=5
Type=notify
User=root
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

b.通过模板创建文件

for (( i=0; i < 3; i++ ))
  do
    sed -e "s/##NODE_NAME##/${NODE_NAMES[i]}/" -e "s/##NODE_IP##/${NODE_IPS[i]}/" kube-apiserver.service.template > kube-apiserver-${NODE_IPS[i]}.service 
  done

c.分发

for node_ip in ${NODE_IPS[@]}
  do
    echo ">>> ${node_ip}"
    ssh root@${node_ip} "mkdir -p /var/log/kubernetes"
    scp kube-apiserver-${node_ip}.service root@${node_ip}:/etc/systemd/system/kube-apiserver.service
  done

d.启动服务

for node_ip in ${NODE_IPS[@]}
  do
    echo ">>> ${node_ip}"
    ssh root@${node_ip} "systemctl daemon-reload && systemctl enable kube-apiserver && systemctl restart kube-apiserver"
  done

e.检查运行状态

for node_ip in ${NODE_IPS[@]}
  do
    echo ">>> ${node_ip}"
    ssh root@${node_ip} "systemctl status kube-apiserver |grep 'Active:'"
  done

f.打印kube-apiserver写入etcd的数据

ETCDCTL_API=3 etcdctl 
    --endpoints=${ETCD_ENDPOINTS} 
    --cacert=/etc/kubernetes/cert/ca.pem 
    --cert=/etc/etcd/cert/etcd.pem 
    --key=/etc/etcd/cert/etcd-key.pem 
    get /registry/ --prefix --keys-only

g.查看相关信息

[root@kube-node1 ~]# kubectl cluster-info
Kubernetes master is running at https://172.17.13.204:6443

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

[root@kube-node1 ~]# kubectl get all --all-namespaces
NAMESPACE   NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
default     service/kubernetes   ClusterIP   10.254.0.1   <none>        443/TCP   56m

[root@kube-node1 ~]# kubectl get componentstatuses
NAME                 STATUS      MESSAGE                                                                                        ERROR
controller-manager   Unhealthy   Get http://127.0.0.1:10252/healthz: dial tcp 127.0.0.1:10252: getsockopt: connection refused
scheduler            Unhealthy   Get http://127.0.0.1:10251/healthz: dial tcp 127.0.0.1:10251: getsockopt: connection refused
etcd-2               Healthy     {"health":"true"}
etcd-1               Healthy     {"health":"true"}
etcd-0               Healthy     {"health":"true"}

检查 kube-apiserver 监听的端口

sudo netstat -lnpt|grep kube

授予 kubernetes 证书访问 kubelet API 的权限

kubectl create clusterrolebinding kube-apiserver:kubelet-apis --clusterrole=system:kubelet-api-admin --user kubernetes

最后

以上就是开朗石头为你收集整理的6.2 kube-apiserver的全部内容，希望文章能够帮你解决6.2 kube-apiserver所遇到的程序开发问题。

如果觉得靠谱客网站的内容还不错，欢迎将靠谱客网站推荐给程序员好友。