1.部署kubelet
1.二进制包准备：将软件包从linux-node1复制到linux-node2中
[root@linux-node1 ~]# cd /usr/local/src/kubernetes/server/bin/ [root@linux-node1 bin]# cp kubelet kube-proxy /opt/kubernetes/bin/ [root@linux-node1 bin]# scp kubelet kube-proxy 192.168.56.12:/opt/kubernetes/bin/ [root@linux-node1 bin]# scp kubelet kube-proxy 192.168.56.13:/opt/kubernetes/bin/
2.创建角色绑定
#kubectl启动的时候需要访问api-server动态获取证书 [root@linux-node1 bin]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap clusterrolebinding.rbac.authorization.k8s.io "kubelet-bootstrap" created
3.创建 kubelet bootstrapping kubeconfig 文件，设置集群参数
[root@linux-node1 ssl]# kubectl config set-cluster kubernetes \ --certificate-authority=/opt/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=https://192.168.56.11:6443 \ --kubeconfig=bootstrap.kubeconfig Cluster "kubernetes" set.
4.设置客户端认证参数
[root@linux-node1 ssl]# kubectl config set-credentials kubelet-bootstrap \ --token=ad6d5bb607a186796d8861557df0d17f \ --kubeconfig=bootstrap.kubeconfig User "kubelet-bootstrap" set. [root@linux-node1 ssl]# ll bootstrap.kubeconfig -rw------- 1 root root 2086 Sep 23 15:30 bootstrap.kubeconfig
5.设置上下文参数
[root@linux-node1 ssl]# kubectl config set-context default \ --cluster=kubernetes \ --user=kubelet-bootstrap \ --kubeconfig=bootstrap.kubeconfig Context "default" created.
6.选择默认上下文
[root@linux-node1 ssl]# kubectl config use-context default --kubeconfig=bootstrap.kubeconfig Switched to context "default". [root@linux-node1 ssl]# cp bootstrap.kubeconfig /opt/kubernetes/cfg [root@linux-node1 ssl]# scp bootstrap.kubeconfig 192.168.56.12:/opt/kubernetes/cfg [root@linux-node1 ssl]# scp bootstrap.kubeconfig 192.168.56.13:/opt/kubernetes/cfg
7.部署kubelet 1.设置CNI(k8s网络接口插件)支持
[root@linux-node2 ~]# mkdir -p /etc/cni/net.d
[root@linux-node2 ~]# cat > /etc/cni/net.d/10-default.conf <<EOF
{
"name": "flannel",
"type": "flannel",
"delegate": {
"bridge": "docker0",
"isDefaultGateway": true,
"mtu": 1400
}
}
EOF8.创建kubelet目录
[root@linux-node2 ~]# mkdir /var/lib/kubelet
9.创建kubelet服务配置
[root@k8s-node2 ~]# cat > /usr/lib/systemd/system/kubelet.service <<EOF [Unit] Description=Kubernetes Kubelet Documentation=https://github.com/GoogleCloudPlatform/kubernetes After=docker.service Requires=docker.service [Service] WorkingDirectory=/var/lib/kubelet ExecStart=/opt/kubernetes/bin/kubelet \ --address=192.168.56.12 \ --hostname-override=192.168.56.12 \ --pod-infra-container-image=mirrorgooglecontainers/pause-amd64:3.0 \ --experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \ --kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \ --cert-dir=/opt/kubernetes/ssl \ --network-plugin=cni \ --cni-conf-dir=/etc/cni/net.d \ --cni-bin-dir=/opt/kubernetes/bin/cni \ --cluster-dns=10.1.0.2 \ --cluster-domain=cluster.local. \ --hairpin-mode hairpin-veth \ --allow-privileged=true \ --fail-swap-on=false \ --logtostderr=true \ --v=2 \ --logtostderr=false \ --log-dir=/opt/kubernetes/log Restart=on-failure RestartSec=5 EOF
10.启动Kubelet
[root@linux-node2 ~]# systemctl daemon-reload && systemctl enable kubelet && systemctl restart kubelet
11.查看服务状态
[root@linux-node2 kubernetes]# systemctl status kubelet
12.查看csr请求 注意是在linux-node1上执行
[root@linux-node1 kubernetes]# systemctl status kubelet
13.批准kubelet 的 TLS 证书请求
[root@linux-node1 ssl]# kubectl get csr|grep 'Pending' | awk 'NR>0{print $1}'| xargs kubectl certificate approve
certificatesigningrequest.certificates.k8s.io "node-csr-s0I6Fq1DFbi-CY6KtmXsKKR8npGpnVYz5TFQIjF97JI" approved
certificatesigningrequest.certificates.k8s.io "node-csr-sd1_Wsb15BbETUbi5XrAOVVyHs5uFyEce2jNR0ZVEOs" approved
查看可发现多了kubelet-client.crt这个证书
[root@linux-node2 ssl]# ll /opt/kubernetes/ssl/kubelet-client.crt
-rw-r--r-- 1 root root 1046 Sep 23 15:41 /opt/kubernetes/ssl/kubelet-client.crt执行完毕后，查看节点状态已经是Ready的状态了
[root@linux-node1 ssl]# kubectl get node NAME STATUS ROLES AGE VERSION 192.168.56.12 Ready <none> 29s v1.10.1 192.168.56.13 Ready <none> 13s v1.10.1
2.部署Kubernetes Proxy
1.配置kube-proxy使用LVS
[root@linux-node2 ~]# yum install -y ipvsadm ipset conntrack
2.创建 kube-proxy 证书请求
[root@linux-node1 ~]# cd /usr/local/src/ssl/
[root@linux-node1 ssl]# cat > kube-proxy-csr.json <<EOF
{
"CN": "system:kube-proxy",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF3.生成证书
[root@linux-node1 ssl]# cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \ -ca-key=/opt/kubernetes/ssl/ca-key.pem \ -config=/opt/kubernetes/ssl/ca-config.json \ -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
4.分发证书到所有Node节点
[root@linux-node1 ssl]# cp kube-proxy*.pem /opt/kubernetes/ssl/ [root@linux-node1 ssl]# scp kube-proxy*.pem 192.168.56.12:/opt/kubernetes/ssl/ [root@linux-node1 ssl]# scp kube-proxy*.pem 192.168.56.12:/opt/kubernetes/ssl/
5.创建kube-proxy配置文件
[root@linux-node1 ssl]# kubectl config set-cluster kubernetes \ --certificate-authority=/opt/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=https://192.168.56.11:6443 \ --kubeconfig=kube-proxy.kubeconfig Cluster "kubernetes" set. [root@linux-node1 ssl]# kubectl config set-credentials kube-proxy \ --client-certificate=/opt/kubernetes/ssl/kube-proxy.pem \ --client-key=/opt/kubernetes/ssl/kube-proxy-key.pem \ --embed-certs=true \ --kubeconfig=kube-proxy.kubeconfig User "kube-proxy" set. [root@linux-node1 ssl]# kubectl config set-context default \ --cluster=kubernetes \ --user=kube-proxy \ --kubeconfig=kube-proxy.kubeconfig Context "default" created. [root@linux-node1 ssl]# kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig Switched to context "default".
6.分发kubeconfig配置文件
[root@linux-node1 ssl]# cp kube-proxy.kubeconfig /opt/kubernetes/cfg/ [root@linux-node1 ~]# scp kube-proxy.kubeconfig 192.168.56.12:/opt/kubernetes/cfg/ [root@linux-node1 ~]# scp kube-proxy.kubeconfig 192.168.56.13:/opt/kubernetes/cfg/
7.创建kube-proxy服务配置
[root@linux-node2 bin]# mkdir /var/lib/kube-proxy [root@k8s-node2 ~]# cat > /usr/lib/systemd/system/kube-proxy.service <<EOF [Unit] Description=Kubernetes Kube-Proxy Server Documentation=https://github.com/GoogleCloudPlatform/kubernetes After=network.target [Service] WorkingDirectory=/var/lib/kube-proxy ExecStart=/opt/kubernetes/bin/kube-proxy \ --bind-address=192.168.56.12 \ --hostname-override=192.168.56.12 \ --kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig \ --masquerade-all \ --feature-gates=SupportIPVSProxyMode=true \ --proxy-mode=ipvs \ --ipvs-min-sync-period=5s \ --ipvs-sync-period=5s \ --ipvs-scheduler=rr \ --logtostderr=true \ --v=2 \ --logtostderr=false \ --log-dir=/opt/kubernetes/log Restart=on-failure RestartSec=5 LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF
8.启动Kubernetes Proxy
[root@linux-node2 ~]# systemctl daemon-reload && systemctl enable kube-proxy && systemctl start kube-proxy
9.查看服务状态 查看kube-proxy服务状态
[root@linux-node2 ssl]# systemctl status kube-proxy 检查LVS状态 [root@linux-node2 ssl]# ipvsadm -L -n IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.1.0.1:443 rr persistent 10800 -> 192.168.56.11:6443 Masq 1 0 0
如果你在两台实验机器都安装了kubelet和proxy服务，使用下面的命令可以检查状态：
[root@linux-node1 ssl]# kubectl get node NAME STATUS ROLES AGE VERSION 192.168.56.12 Ready <none> 11m v1.10.1 192.168.56.13 Ready <none> 10m v1.10.1
linux-node3节点请自行部署，只需修改启动文件里节点IP其余配置与node2相同。
