1.参考文档
https://v1-12.docs.kubernetes.io/docs/reference/command-line-tools-reference/kubelet-tls-bootstrapping/#bootstrap-tokens
https://kubernetes.io/zh/docs/setup/independent/create-cluster-kubeadm/
https://www.kubernetes.org.cn/5025.html
2.基础环境 (服务器IP：172.17.0.51,52,53)
a.系统版本 CentOS Linux release 7.6.1810 (Core)
b.kubernetes版本
kubernetes-server-linux-amd64(v1.13.1)
kubernetes-node-linux-amd64(v1.13.1)
kubernetes-client-linux-amd64(v1.13.1)
c.修改主机名 hostnamectl --static set-hostname node4051,修改 /etc/hosts
2.安装kubernetes server
Kubernetes master运行组件：
kube-apiserver,kube-scheduler,kube-controller-manager
a. 复制执行文件
tar -zxvf kubernetes-server-linux-amd64.tar.gz && cd kubernetes/server/bin/
cp kube-apiserver kube-scheduler kube-controller-manager kubectl /bin/
b. 创建TLS Bootstrapping Token
让kubelet先使用一个预定低权限使用者连接到kube-apiserver,然后在对kube-apiserver申请凭证签署
mkdir -p /etc/kubernetes/{conf,ssl} && cd /etc/kubernetes/conf
head -c 16 /dev/urandom | od -An -t x | tr -d ' '
生成tokens 938752325e746f9d52be37a3705184f3
创建tokens验证文件
cat token.csv
938752325e746f9d52be37a3705184f3,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
c.创建配置文件
创建kube-apiserver配置文件
cat << EOF > /etc/kubernetes/conf/kube-apiserver
KUBE_API_ARGS="--logtostderr=true \
--v=2 \
--etcd-servers=https://172.17.0.51:2379,https://172.17.0.52:2379,https://172.17.0.53:2379 \
--bind-address=172.17.0.51 \
--secure-port=6443 \
--advertise-address=172.17.0.51 \
--allow-privileged=true \
--service-cluster-ip-range=10.254.0.0/16 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth \
--token-auth-file=/etc/kubernetes/conf/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/etc/kubernetes/ssl/server.pem \
--tls-private-key-file=/etc/kubernetes/ssl/server-key.pem \
--client-ca-file=/etc/kubernetes/ssl/ca.pem \
--service-account-key-file=/etc/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/etc/etcd/ca.pem \
--etcd-certfile=/etc/etcd/server.pem \
--etcd-keyfile=/etc/etcd/server-key.pem \
--requestheader-client-ca-file=/etc/kubernetes/ssl/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/ssl/metrics-server.pem \
--proxy-client-key-file=/etc/kubernetes/ssl/metrics-server-key.pem \
--enable-aggregator-routing=true"
EOF
创建kube-controller-manager配置文件
cat << EOF > /etc/kubernetes/conf/kube-controller-manager
KUBE_CONTROLLER_MANAGER_ARGS="--logtostderr=true \
--v=2 \
--master=127.0.0.1:8080 \
--leader-elect=true \
--address=127.0.0.1 \
--service-cluster-ip-range=10.254.0.0/16 \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/etc/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/etc/kubernetes/ssl/ca-key.pem \
--root-ca-file=/etc/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/etc/kubernetes/ssl/ca-key.pem"
EOF
创建kube-scheduler配置文件
cat << EOF > /etc/kubernetes/conf/kube-scheduler
KUBE_SCHEDULER_ARGS="--logtostderr=true --v=2 --master=127.0.0.1:8080 --leader-elect"
EOF
创建kube-apiserver systemd文件
cat << EOF > /usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target
[Service]
EnvironmentFile=-/etc/kubernetes/conf/kube-apiserver
ExecStart=/usr/bin/kube-apiserver $KUBE_API_ARGS
Restart=on-failure
Type=notify
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
创建kube-controller-manager systemd文件
cat << EOF > /usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
Requires=kube-apiserver.service
After=kube-apiserver.service
[Service]
EnvironmentFile=-/etc/kubernetes/conf/kube-controller-manager
ExecStart=/usr/bin/kube-controller-manager \
$KUBE_CONTROLLER_MANAGER_ARGS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
创建kube-scheduler systemd文件
cat << EOF > /usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler Plugin
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
Requires=kube-apiserver.service
After=kube-apiserver.service
[Service]
EnvironmentFile=-/etc/kubernetes/conf/kube-scheduler
ExecStart=/usr/bin/kube-scheduler $KUBE_SCHEDULER_ARGS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
3.启动配置
systemctl daemon-reload
systemctl enable kube-apiserver
systemctl enable kube-controller-manager
systemctl enable kube-scheduler
systemctl start kube-apiserver
systemctl start kube-controller-manager
Systemctl start kube-scheduler
4.验证master节点
systemctl status {kube-apiserver,kube-controller-manager,kube-scheduler}
kubectl get cs,ns