一、实验环境

• master节点：192.168.52.12
• node01节点：192.168.52.21
• node02节点：192.168.52.22

二、etcd部署

1.master节点

制作证书

• cfssl证书制作工具下载方式

vim cfssl.sh    ##制作下载脚本

curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl
curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson
curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo

bash cfssl.sh

定义ca证书

vim ca-config.json

{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"     
        ]  
      } 
    }         
  }
}

实现证书签名

vim ca-csr.json

{   
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}

生成ca-key.pem ca.pem证书

cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

指定etcd三节点之间的通信验证

vim server-csr.json
{
    "CN": "etcd",
    "hosts": [
    "192.168.52.12",
    "192.168.52.21",
    "192.168.52.22"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}

生成ETCD证书

下载ETCD二进制包地址

https://github.com/etcd-io/etcd/releases 

[root@master01 k8s]# ls
etcd-cert  etcd-v3.3.10-linux-amd64.tar.gz     kubernetes-server-linux-amd64.tar.gz
etcd.sh    flannel-v0.10.0-linux-amd64.tar.gz
[root@master01 k8s]# tar zxvf etcd-v3.3.10-linux-amd64.tar.gz 

[root@master01 k8s]# ls etcd-v3.3.10-linux-amd64
Documentation  etcd  etcdctl  README-etcdctl.md  README.md  READMEv2-etcdctl.md

创建cfg配置文件、bin命令文件、ssl证书

证书拷贝

[root@master01 k8s]# cp etcd-cert/*.pem /opt/etcd/ssl/

节点加入

此时状态会卡住，等待其他节点加入，但是此时的etcd进程已经开启
bash etcd.sh etcd01 192.168.52.12 etcd02=https://192.168.52.21:2380,etcd03=https://192.168.52.22:2380

拷贝证书去其他节点

[root@master01 k8s]# scp -r /opt/etcd/ root@192.168.195.150:/opt/
[root@master01 k8s]# scp -r /opt/etcd/ root@192.168.195.151:/opt/

拷贝启动脚本去其他节点

[root@master01 k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.52.21:/usr/lib/systemd/system/
[root@master01 k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.52.22:/usr/lib/systemd/system/

2.node01节点

vim /opt/etcd/cfg/etcd

#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.52.21:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.52.21:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.52.21:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.52.21:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.52.12:2380,etcd02=https://192.168.52.21:2380,etcd03=https://192.168.52.22:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

启动
systemctl start etcd
systemctl status etcd

3.node02节点

vim /opt/etcd/cfg/etcd

#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.52.22:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.52.22:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.52.22:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.52.22:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.52.12:2380,etcd02=https://192.168.52.21:2380,etcd03=https://192.168.52.22:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

启动
systemctl start etcd
systemctl status etcd

4.检查集群状态

[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.195.149:2379,https://192.168.195.150:2379,https://192.168.195.151:2379" cluster-health

三、docker引擎部署

• 所有的node节点部署docker引擎
• 参考博客地址：
  https://blog.csdn.net/weixin_45647891/article/details/114497609

四、flannel网络配置

• 写入分配的子网段到ETCD中，供flannel使用

1.master操作

[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.52.12:2379,https://192.168.52.21:2379,https://192.168.52.22:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'

//查看写入信息
[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.52.12:2379,https://192.168.52.21:2379,https://192.168.52.22:2379" get /coreos.com/network/config

//将需要的flannel压缩包拷贝到所有的node节点
cd k8s
scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.52.21:/root
scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.52.22:/root

2.node1节点操作

[root@node01 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz 
flanneld
mk-docker-opts.sh
README.md
//k8s工作目录
[root@node01 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node01 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/

//编辑flannel脚本
[root@localhost ~]# vim flannel.sh
#!/bin/bash

ETCD_ENDPOINTS=${1:-"http://127.0.0.1:2379"}

cat <<EOF >/opt/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} \
-etcd-cafile=/opt/etcd/ssl/ca.pem \
-etcd-certfile=/opt/etcd/ssl/server.pem \
-etcd-keyfile=/opt/etcd/ssl/server-key.pem"

EOF

cat <<EOF >/usr/lib/systemd/system/flanneld.service
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service

[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq \$FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure

[Install]
WantedBy=multi-user.target

EOF

systemctl daemon-reload
systemctl enable flanneld
systemctl restart flanneld

//开启flannel网络功能
[root@node01 ~]# bash flannel.sh https://192.168.52.12:2379,https://192.168.52.21:2379,https://192.168.52.22:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.   //返回信息，服务开启成功

//配置docker连接flannel
[root@node01 ~]# vim /usr/lib/systemd/system/docker.service
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always

[root@node01 ~]# cat /run/flannel/subnet.env 
DOCKER_OPT_BIP="--bip=172.17.80.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
DOCKER_NETWORK_OPTIONS=" --bip=172.17.80.1/24 --ip-masq=false --mtu=1450"

//重启docker服务
 systemctl daemon-reload
 systemctl restart docker

//查看flannel网络
ifconfig

创建centos：7容器并进入容器
[root@node01 ~]# docker run -it centos:7 /bin/bash
[root@f0281ed6aa12 /]# yum install net-tools -y
[root@f0281ed6aa12 /]# ifconfig

3.node2节点操作

• 操作同node01
  

4.ping通测试：ping通两个节点的centos:7容器

五、部署master组件

1.master01上操作

[root@master01 k8s]# unzip master.zip
[root@master01 k8s]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@master01 k8s]# mkdir k8s-cert
[root@master01 k8s]# cd k8s-cert/
[root@master01 k8s-cert]# ls
k8s-cert.sh

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 <<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 -

#-----------------------

cat > server-csr.json <<EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.52.12",  //master1
      "192.168.52.12",  //master2
      "192.168.52.100",  //vip
      "192.168.52.14",  //lb （master）
      "192.168.52.15",  //lb （backup）
      "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 > admin-csr.json <<EOF
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF

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

#-----------------------

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

//生成证书
[root@master01 k8s-cert]# bash k8s-cert.sh 

[root@master01 k8s-cert]# cp ca*pem server*pem /opt/kubernetes/ssl/
[root@master01 k8s-cert]# cd ..
//解压kubernetes压缩包
[root@master01 k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz
[root@master01 k8s]# cd /root/k8s/kubernetes/server/bin
//复制关键命令文件
[root@master01 bin]# cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin/

//使用 head -c 16 /dev/urandom | od -An -t x | tr -d ' ' 可以随机生成序列号
[root@localhost k8s]# cd /root/k8s
[root@localhost k8s]# vim /opt/kubernetes/cfg/token.csv
6aace3dbc452f5a652182514f7e9072b,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
序列号，用户名，id，角色

//二进制文件，token，证书都准备好，开启apiserver
[root@localhost k8s]# bash apiserver.sh 192.168.52.12https://192.168.52.12:2379,https://192.168.52.21:2379,https://192.168.52.22:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/systemd/system/kube-apiserver.service.
//检查进程是否启动成功
[root@localhost k8s]# ps aux | grep kube
//监听的https端口
[root@localhost k8s]# netstat -ntap | grep 6443
tcp        0      0 192.168.195.149:6443    0.0.0.0:*               LISTEN      46459/kube-apiserve 
tcp        0      0 192.168.195.149:6443    192.168.195.149:36806   ESTABLISHED 46459/kube-apiserve 
tcp        0      0 192.168.195.149:36806   192.168.195.149:6443    ESTABLISHED 46459/kube-apiserve 
[root@localhost k8s]# netstat -ntap | grep 8080
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      46459/kube-apiserve 

//启动scheduler服务
[root@localhost k8s]# ./scheduler.sh 127.0.0.1
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-scheduler.service to /usr/lib/systemd/system/kube-scheduler.service.
[root@localhost k8s]# ps aux | grep ku
[root@localhost k8s]# chmod +x controller-manager.sh 
//启动controller-manager
[root@localhost k8s]# ./controller-manager.sh 127.0.0.1
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service to /usr/lib/systemd/system/kube-controller-manager.service.
//查看master 节点状态
[root@localhost k8s]# /opt/kubernetes/bin/kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-2               Healthy   {"health":"true"}   
etcd-1               Healthy   {"health":"true"}   
etcd-0               Healthy   {"health":"true"}   

2.node节点部署

//master上操作
//把 kubelet、kube-proxy拷贝到node节点上去
[root@localhost bin]# scp kubelet kube-proxy root@192.168.52.21:/opt/kubernetes/bin/
root@192.168.52.21's password: 
kubelet                                                           100%  168MB  27.9MB/s   00:06    
kube-proxy                                                        100%   48MB  31.5MB/s   00:01    
[root@localhost bin]# scp kubelet kube-proxy root@192.168.52.22:/opt/kubernetes/bin/
root@192.168.52.22's password: 
kubelet                                                           100%  168MB  56.1MB/s   00:03    
kube-proxy                                                        100%   48MB  37.3MB/s   00:01    

//nod01节点操作（复制node.zip到/root目录下再解压）
[root@localhost ~]# ls
anaconda-ks.cfg  flannel-v0.10.0-linux-amd64.tar.gz  node.zip   公共  视频  文档  音乐
flannel.sh       initial-setup-ks.cfg                README.md  模板  图片  下载  桌面
//解压node.zip，获得kubelet.sh  proxy.sh 
[root@localhost ~]# unzip node.zip 

//在master上操作
[root@localhost k8s]# mkdir kubeconfig
[root@localhost k8s]# cd kubeconfig/
//拷贝kubeconfig.sh文件进行重命名
[root@localhost kubeconfig]# mv kubeconfig.sh kubeconfig
[root@localhost kubeconfig]# vim kubeconfig 
----------------删除以下部分----------------------------------------------------------------------
# 创建 TLS Bootstrapping Token
#BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')
BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008

cat > token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF

//获取token信息（红色部分）
[root@localhost ~]# cat /opt/kubernetes/cfg/token.csv 
6aace3dbc452f5a652182514f7e9072b,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
//配置文件修改为tokenID

# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
  --token=6aace3dbc452f5a652182514f7e9072b \
  --kubeconfig=bootstrap.kubeconfig
  
//设置环境变量（可以写入到/etc/profile中）
[root@localhost kubeconfig]# export PATH=$PATH:/opt/kubernetes/bin/
[root@localhost kubeconfig]# kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-1               Healthy   {"health":"true"}   
etcd-0               Healthy   {"health":"true"}   
etcd-2               Healthy   {"health":"true"}   

//修改kubeconfig配置文件
[root@master01 k8s]# ls
apiserver.sh           etcd       etcd-v3.3.10-linux-amd64  kubernetes                            scheduler.sh
cfssl.sh               etcd-cert  k8s-cert                  kubernetes-server-linux-amd64.tar.gz
controller-manager.sh  etcd.sh    kubeconfig                master.zip
[root@master01 k8s]# cd kubeconfig/
[root@master01 kubeconfig]# ls
bootstrap.kubeconfig  kubeconfig  kube-proxy.kubeconfig
[root@master01 kubeconfig]# vim kubeconfig

//生成配置文件
[root@localhost kubeconfig]# bash kubeconfig 192.168.52.12 /root/k8s/k8s-cert/
Cluster "kubernetes" set.
User "kubelet-bootstrap" set.
Context "default" created.
Switched to context "default".
Cluster "kubernetes" set.
User "kube-proxy" set.
Context "default" created.
Switched to context "default".
[root@localhost kubeconfig]# ls
bootstrap.kubeconfig  kubeconfig  kube-proxy.kubeconfig

//拷贝配置文件到node节点
[root@localhost kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.52.21:/opt/kubernetes/cfg/
root@192.168.52.21's password: 
bootstrap.kubeconfig                                              100% 2169     2.1MB/s   00:00    
kube-proxy.kubeconfig                                             100% 6275     4.2MB/s   00:00    
[root@localhost kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.52.22:/opt/kubernetes/cfg/
root@192.168.52.22's password: 
bootstrap.kubeconfig                                              100% 2169     1.8MB/s   00:00    
kube-proxy.kubeconfig                                             100% 6275     5.3MB/s   00:00    
//创建bootstrap角色赋予权限用于连接apiserver请求签名（关键）
[root@localhost kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created

//在node01节点上操作
[root@localhost ~]# bash kubelet.sh 192.168.52.21
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
//检查kubelet服务启动
[root@localhost ~]# ps aux | grep kube
root     106845  1.4  1.1 371744 44780 ?        Ssl  00:34   0:01 /opt/kubernetes/bin/kubelet --logtostderr=true --v=4 --hostname-override=192.168.52.21 --kubeconfig=/opt/kubernetes/cfg/kubelet.kubconfig --bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig --config=/opt/kubernetes/cfgkubelet.config --cert-dir=/opt/kubernetes/ssl --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0
root     106876  0.0  0.0 112676   984 pts/0    S+   00:35   0:00 grep --color=auto kube

//检查到node01节点的请求
[root@localhost kubeconfig]# kubectl get csr
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-NOI-9vufTLIqJgMWq4fHPNPHKbjCXlDGHptj7FqTa8A   4m27s   kubelet-bootstrap   Pending（等待集群给该节点颁发证书）

[root@localhost kubeconfig]# kubectl certificate approve node-csr-NOI-9vufTLIqJgMWq4fHPNPHKbjCXlDGHptj7FqTa8A
certificatesigningrequest.certificates.k8s.io/node-csr-NOI-9vufTLIqJgMWq4fHPNPHKbjCXlDGHptj7FqTa8A approved
//继续查看证书状态
[root@localhost kubeconfig]# kubectl get csr
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-NOI-9vufTLIqJgMWq4fHPNPHKbjCXlDGHptj7FqTa8A   8m56s   kubelet-bootstrap   Approved,Issued（已经被允许加入群集）
//查看群集节点，成功加入node01节点
[root@localhost kubeconfig]# kubectl get node
NAME              STATUS   ROLES    AGE    VERSION
192.168.52.21  Ready    <none>   118s   v1.12.3

//在node01节点操作，启动proxy服务
[root@localhost ~]# bash proxy.sh 192.168.195.150
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.
[root@localhost ~]# systemctl status kube-proxy.service 

node02部署

//在node01节点操作
//把现成的/opt/kubernetes目录复制到其他节点进行修改即可
[root@localhost ~]# scp -r /opt/kubernetes/ root@192.168.52.22:/opt/
The authenticity of host '192.168.52.22 (192.168.52.22)' can't be established.
ECDSA key fingerprint is SHA256:HyV9L/xOcN5435t9zCPMCC63XiwMwgBLIa7L++Gea0k.
ECDSA key fingerprint is MD5:4b:01:0f:c3:cb:3e:3a:4c:f0:51:85:fc:c1:6b:c5:fe.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.52.22' (ECDSA) to the list of known hosts.
root@192.168.52.22's password: 
flanneld                                                          100%  241   471.1KB/s   00:00    
bootstrap.kubeconfig                                              100% 2169     2.9MB/s   00:00    
kube-proxy.kubeconfig                                             100% 6275    10.3MB/s   00:00    
kubelet                                                           100%  379   130.7KB/s   00:00    
kubelet.config                                                    100%  269   420.0KB/s   00:00    
kubelet.kubeconfig                                                100% 2298     3.5MB/s   00:00    
kube-proxy                                                        100%  191   353.2KB/s   00:00    
mk-docker-opts.sh                                                 100% 2139     4.5MB/s   00:00    
flanneld                                                          100%   35MB  50.5MB/s   00:00    
kubelet                                                           100%  168MB  84.9MB/s   00:01    
kube-proxy                                                        100%   48MB  94.7MB/s   00:00    
kubelet.crt                                                       100% 2197   902.9KB/s   00:00    
kubelet.key                                                       100% 1679     2.3MB/s   00:00    
kubelet-client-2020-02-02-00-42-27.pem                            100% 1277   493.9KB/s   00:00    
kubelet-client-current.pem                                        100% 1277   429.5KB/s   00:00    

//把kubelet，kube-proxy的service文件拷贝到node2中
[root@localhost ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.52.22:/usr/lib/systemd/system/
root@192.168.52.22's password: 
kubelet.service                                                   100%  264   303.9KB/s   00:00    
kube-proxy.service                                                100%  231   209.1KB/s   00:00    

//在node02上操作，进行修改
//首先删除复制过来的证书，等会node02会自行申请证书
[root@localhost ~]# cd /opt/kubernetes/ssl/
[root@localhost ssl]# rm -rf *
//修改配置文件kubelet  kubelet.config kube-proxy（三个配置文件）

[root@localhost ssl]# cd ../cfg/
[root@localhost cfg]# vim kubelet

KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.52.22 \
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \
--config=/opt/kubernetes/cfg/kubelet.config \
--cert-dir=/opt/kubernetes/ssl \
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

[root@localhost cfg]# vim kubelet.config 
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.52.22
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local.
failSwapOn: false
authentication:
  anonymous:
    enabled: true
~                                  
[root@localhost cfg]# vim kube-proxy
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.52.22 \
--cluster-cidr=10.0.0.0/24 \
--proxy-mode=ipvs \
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
//启动服务
[root@localhost cfg]# systemctl start kubelet.service 
[root@localhost cfg]# systemctl enable kubelet.service 
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
[root@localhost cfg]# systemctl start kube-proxy.service 
[root@localhost cfg]# systemctl enable kube-proxy.service 
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.

//在master上操作查看请求

[root@localhost k8s]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-OaH9HpIKh6AKlfdjEKm4C6aJ0UT_1YxNaa70yEAxnsU   15s   kubelet-bootstrap   Pending
//授权许可加入群集
[root@localhost k8s]# kubectl certificate approve node-csr-OaH9HpIKh6AKlfdjEKm4C6aJ0UT_1YxNaa70yEAxnsU
certificatesigningrequest.certificates.k8s.io/node-csr-OaH9HpIKh6AKlfdjEKm4C6aJ0UT_1YxNaa70yEAxnsU approved
//查看群集中的节点
[root@localhost k8s]# kubectl get node
NAME              STATUS   ROLES    AGE   VERSION
192.168.52.21   Ready    <none>   21h   v1.12.3
192.168.52.22  Ready    <none>   37s   v1.12.3