环境

三台机器,所有机器相互做解析  centos7.4
关闭防火墙和selinux
 
# 设置主机名
# Master节点
hostnamectl set-hostname k8s-master
# node节点
hostnamectl set-hostname k8s-node1
 
reboot 重新启动服务器，主机名生效
 
 
[root@k8s-master ~]# vim /etc/hosts
192.168.68.250 k8s-master
192.168.68.252 k8s-node1
192.168.68.253 k8s-node2

1、准备cfssl证书生成工具

#选择master进行，也可选择其他

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


上传到/usr/bin/下
[root@k8s-master1 ~]# chmod +x /usr/bin/cfssl*

2、生成Etcd证书

-------------------------master1节点------------------------
1)自签证书颁发机构（CA）

#创建目录
[root@k8s-master1 ~]# mkdir -p ca/etcd
[root@k8s-master1 ~]# cd ca/etcd

#自签CA
[root@k8s-master1 etcd]# vim ca-config.json
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}

[root@k8s-master1 etcd]# vim ca-csr.json
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}

#生成证书
[root@k8s-master1 etcd]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -


2)使用自签CA签发Etcd HTTPS证书

#创建证书申请文件
[root@k8s-master1 etcd]# vim server-csr.json
{
    "CN": "etcd",
    "hosts": [
    "10.8.165.101",
    "10.8.165.102",
    "10.8.165.103"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}

*注：上述文件hosts字段中IP为所有etcd节点的集群内部通信IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP

#生成证书
[root@k8s-master1 etcd]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

3、从Github下载二进制文件

-------------------------master1节点------------------------

[root@k8s-master1 etcd]# cd ~
[root@k8s-master1 ~]# wget https://github.com/etcd-io/etcd/releases/download/v3.4.9/etcd-v3.4.9-linux-amd64.tar.gz

可能由于网络问题无法连接，可以下载下面的文件
链接：https://pan.baidu.com/s/1MEHHHaMCbuTczudztrBK5w?pwd=1eoa 
提取码：1eoa

4、部署Etcd集群

-------------------------master1节点------------------------

#创建工作目录并解压二进制包
[root@k8s-master1 ~]# mkdir -p /opt/etcd/{bin,cfg,ssl}
[root@k8s-master1 ~]# tar zxvf etcd-v3.4.9-linux-amd64.tar.gz
[root@k8s-master1 ~]# mv etcd-v3.4.9-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/

#创建etcd配置文件
[root@k8s-master1 ~]# vim /opt/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.8.165.101:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.8.165.101:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.8.165.101:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.8.165.101:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://10.8.165.101:2380,etcd-2=https://10.8.165.102:2380,etcd-3=https://10.8.165.103:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"


*参数解释
•	ETCD_NAME：节点名称，集群中唯一
•	ETCD_DATA_DIR：数据目录
•	ETCD_LISTEN_PEER_URLS：集群通信监听地址
•	ETCD_LISTEN_CLIENT_URLS：客户端访问监听地址
•	ETCD_INITIAL_ADVERTISE_PEERURLS：集群通告地址
•	ETCD_ADVERTISE_CLIENT_URLS：客户端通告地址
•	ETCD_INITIAL_CLUSTER：集群节点地址
•	ETCD_INITIALCLUSTER_TOKEN：集群Token
•	ETCD_INITIALCLUSTER_STATE：加入集群的当前状态，new是新集群，existing表示加入已有集群


#systemd管理etcd
[root@k8s-master1 ~]# vim /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd.conf
ExecStart=/opt/etcd/bin/etcd \
--cert-file=/opt/etcd/ssl/server.pem \
--key-file=/opt/etcd/ssl/server-key.pem \
--peer-cert-file=/opt/etcd/ssl/server.pem \
--peer-key-file=/opt/etcd/ssl/server-key.pem \
--trusted-ca-file=/opt/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem \
--logger=zap
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

#拷贝刚才生成的证书
[root@k8s-master1 ~]# cp ~/ca/etcd/*.pem /opt/etcd/ssl


#将上面Master节点所有生成的文件拷贝到节点Node2和节点Node3上
[root@k8s-master1 ~]# scp -r /opt/etcd/ k8s-node1:/opt/
[root@k8s-master1 ~]# scp /usr/lib/systemd/system/etcd.service k8s-node1:/usr/lib/systemd/system/
[root@k8s-master1 ~]# scp -r /opt/etcd/ k8s-node2:/opt/
[root@k8s-master1 ~]# scp /usr/lib/systemd/system/etcd.service k8s-node2:/usr/lib/systemd/system/


#在节点Node2和节点Node3分别修改etcd.conf配置文件
[root@k8s-node1 ~]# vim /opt/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd-2"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.8.165.102:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.8.165.102:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.8.165.102:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.8.165.102:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://10.8.165.101:2380,etcd-2=https://10.8.165.102:2380,etcd-3=https://10.8.165.103:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

[root@k8s-node2 ~]# vim /opt/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd-3"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.8.165.103:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.8.165.103:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.8.165.103:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.8.165.103:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://10.8.165.101:2380,etcd-2=https://10.8.165.102:2380,etcd-3=https://10.8.165.103:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"


---------------master1、node1、node2节点------------------

#启动并设置开机启动
systemctl daemon-reload
systemctl enable etcd
systemctl start etcd

*注：master如果先启动了，会出现start悬停等待的现象，这时候可以先把node1、node2的etcd启动，随后master的etcd会正常启动。

#查看集群状态
[root@k8s-master1 ~]# ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://10.8.165.101:2379,https://10.8.165.102:2379,https://10.8.165.103:2379" endpoint health --write-out=table
+---------------------------+--------+-------------+-------+
|         ENDPOINT          | HEALTH |    TOOK     | ERROR |
+---------------------------+--------+-------------+-------+
| https://10.8.165.101:2379 |   true |  8.280002ms |       |
| https://10.8.165.102:2379 |   true |  8.113125ms |       |
| https://10.8.165.103:2379 |   true | 17.479134ms |       |
+---------------------------+--------+-------------+-------+

如果输出上面信息，就说明集群部署成功。
如果有问题第一步先看日志：/var/log/message 或 journalctl -u etcd

四、安装Docker

五、部署Master

1、生成kube-apiserver证书

#创建目录
[root@k8s-master1 ~]# mkdir ca/k8s
[root@k8s-master1 ~]# cd ca/k8s

#自签证书颁发机构（CA）
[root@k8s-master k8s]# vim ca-config.json
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
[root@k8s-master k8s]# vim ca-csr.json
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}

#生成证书
[root@k8s-master1 k8s]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

会生成ca.pem和ca-key.pem文件

2、使用自签CA签发kube-apiserver HTTPS证书

#创建证书申请文件
[root@k8s-master1 k8s]# vim server-csr.json
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "10.8.165.101",    #master1
      "10.8.165.102",    #node1
      "10.8.165.103",    #node2
      "10.8.165.113",    #master2（预留）
      "10.8.165.250",    #vip（预留）
      "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"
        }
    ]
}

#生成证书
[root@k8s-master1 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server

会生成server.pem和server-key.pem文件

3、下载二进制文件

链接：https://pan.baidu.com/s/1oBCKAkxvzqlYPd9JxZ_QHQ?pwd=knyi 
提取码：knyi

#创建目录
[root@k8s-master1 k8s]# cd ~
[root@k8s-master1 ~]# mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs}

#解压二进制包
[root@k8s-master1 ~]# tar -zxf kubernetes-v1.20.4-server-linux-amd64.tar.gz

#拷贝
[root@k8s-master1 ~]# cd kubernetes/server/bin
[root@k8s-master1 bin]# cp kube-apiserver kube-scheduler kube-controller-manager /opt/kubernetes/bin
[root@k8s-master1 bin]# cp kubectl /usr/bin/

4、部署kube-apiserver

#创建配置文件
[root@k8s-master1 bin]# vim /opt/kubernetes/cfg/kube-apiserver.conf
KUBE_APISERVER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--etcd-servers=https://10.8.165.101:2379,https://10.8.165.102:2379,https://10.8.165.103:2379 \
--bind-address=10.8.165.101 \
--secure-port=6443 \
--advertise-address=10.8.165.101 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth=true \
--token-auth-file=/opt/kubernetes/cfg/token.csv \
--service-node-port-range=30000-32767 \
--kubelet-client-certificate=/opt/kubernetes/ssl/server.pem \
--kubelet-client-key=/opt/kubernetes/ssl/server-key.pem \
--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 \
--service-account-issuer=api \
--service-account-signing-key-file=/opt/kubernetes/ssl/server-key.pem \
--etcd-cafile=/opt/etcd/ssl/ca.pem \
--etcd-certfile=/opt/etcd/ssl/server.pem \
--etcd-keyfile=/opt/etcd/ssl/server-key.pem \
--requestheader-client-ca-file=/opt/kubernetes/ssl/ca.pem \
--proxy-client-cert-file=/opt/kubernetes/ssl/server.pem \
--proxy-client-key-file=/opt/kubernetes/ssl/server-key.pem \
--requestheader-allowed-names=kubernetes \
--requestheader-extra-headers-prefix=X-Remote-Extra- \
--requestheader-group-headers=X-Remote-Group \
--requestheader-username-headers=X-Remote-User \
--enable-aggregator-routing=true \
--audit-log-maxage=30 \
--audit-log-maxbackup=3 \
--audit-log-maxsize=100 \
--audit-log-path=/opt/kubernetes/logs/k8s-audit.log"


参考说明
•	--logtostderr：启用日志
•	---v：日志等级
•	--log-dir：日志目录
•	--etcd-servers：etcd集群地址
•	--bind-address：监听地址
•	--secure-port：https安全端口
•	--advertise-address：集群通告地址
•	--allow-privileged：启用授权
•	--service-cluster-ip-range：Service虚拟IP地址段
•	--enable-admission-plugins：准入控制模块
•	--authorization-mode：认证授权，启用RBAC授权和节点自管理
•	--enable-bootstrap-token-auth：启用TLS bootstrap机制
•	--token-auth-file：bootstrap token文件
•	--service-node-port-range：Service nodeport类型默认分配端口范围
•	--kubelet-client-xxx：apiserver访问kubelet客户端证书
•	--tls-xxx-file：apiserver https证书
•	1.20版本必须加的参数：--service-account-issuer，--service-account-signing-key-file
•	--etcd-xxxfile：连接Etcd集群证书
•	--audit-log-xxx：审计日志
•	启动聚合层相关配置：--requestheader-client-ca-file，--proxy-client-cert-file，--proxy-client-key-file，--requestheader-allowed-names，--requestheader-extra-headers-prefix，--requestheader-group-headers，--requestheader-username-headers，--enable-aggregator-routing

#拷贝刚才生成的证书
[root@k8s-master1 bin]# cp ~/ca/k8s/ca*pem ~/ca/k8s/server*pem /opt/kubernetes/ssl/

5、部署kube-controller-manager

#创建配置文件
[root@k8s-master1 bin]# vim /opt/kubernetes/cfg/kube-controller-manager.conf
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--leader-elect=true \
--kubeconfig=/opt/kubernetes/cfg/kube-controller-manager.kubeconfig \
--bind-address=127.0.0.1 \
--allocate-node-cidrs=true \
--cluster-cidr=10.244.0.0/16 \
--service-cluster-ip-range=10.0.0.0/24 \
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem  \
--root-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \
--experimental-cluster-signing-duration=87600h0m0s"   #证书过期时间10年

参数说明
•	--kubeconfig：连接apiserver配置文件
•	--leader-elect：当该组件启动多个时，自动选举（HA）
•	--cluster-signing-cert-file/--cluster-signing-key-file：自动为kubelet颁发证书的CA，与apiserver保持一致

生成kubeconfig文件

#生成kube-controller-manager证书
[root@k8s-master1 bin]# cd ~/ca/k8s/

[root@k8s-master1 k8s]# vim kube-controller-manager-csr.json
{
  "CN": "system:kube-controller-manager",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}

[root@k8s-master1 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager

#生成kubeconfig文件
[root@k8s-master1 k8s]# KUBE_CONFIG="/opt/kubernetes/cfg/kube-controller-manager.kubeconfig"
[root@k8s-master1 k8s]# KUBE_APISERVER="https://10.8.165.101:6443"

·终端执行（4条）
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-credentials kube-controller-manager \
  --client-certificate=./kube-controller-manager.pem \
  --client-key=./kube-controller-manager-key.pem \
  --embed-certs=true \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-controller-manager \
  --kubeconfig=${KUBE_CONFIG}

kubectl config use-context default --kubeconfig=${KUBE_CONFIG}

systemd管理controller-manager

[root@k8s-master1 k8s]# vim /usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-controller-manager.conf
ExecStart=/opt/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

#启动并设置开机启动
systemctl daemon-reload
systemctl enable kube-controller-manager
systemctl start kube-controller-manager

6、部署kube-scheduler

#创建配置文件
[root@k8s-master1 k8s]# vim /opt/kubernetes/cfg/kube-scheduler.conf
KUBE_SCHEDULER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--leader-elect \
--kubeconfig=/opt/kubernetes/cfg/kube-scheduler.kubeconfig \
--bind-address=127.0.0.1"

参数说明
•	--kubeconfig：连接apiserver配置文件
•	--leader-elect：当该组件启动多个时，自动选举（HA）

生成kubeconfig文件

#生成kube-scheduler证书（在/root/ca/k8s目录下）
[root@k8s-master1 k8s]# pwd
/root/ca/k8s

[root@k8s-master1 k8s]# vim kube-scheduler-csr.json
{
  "CN": "system:kube-scheduler",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}


#生成证书
[root@k8s-master1 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-scheduler-csr.json | cfssljson -bare kube-scheduler

生成kubeconfig文件

[root@k8s-master1 k8s]# KUBE_CONFIG="/opt/kubernetes/cfg/kube-scheduler.kubeconfig"
[root@k8s-master1 k8s]# KUBE_APISERVER="https://10.8.165.101:6443"


·终端执行（4条）
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-credentials kube-scheduler \
  --client-certificate=./kube-scheduler.pem \
  --client-key=./kube-scheduler-key.pem \
  --embed-certs=true \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-scheduler \
  --kubeconfig=${KUBE_CONFIG}

kubectl config use-context default --kubeconfig=${KUBE_CONFIG}

systemd管理scheduler

[root@k8s-master1 k8s]# vim /usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-scheduler.conf
ExecStart=/opt/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

#启动并设置开机启动
systemctl daemon-reload
systemctl enable kube-scheduler
systemctl start kube-scheduler

查看集群状态

#生成kubectl连接集群的证书
[root@k8s-master1 k8s]# vim admin-csr.json
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}

[root@k8s-master1 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin

#生成kubeconfig文件
[root@k8s-master1 k8s]# mkdir /root/.kube

[root@k8s-master1 k8s]# KUBE_CONFIG="/root/.kube/config"
[root@k8s-master1 k8s]# KUBE_APISERVER="https://10.8.165.101:6443"

·终端执行（4条）
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-credentials cluster-admin \
  --client-certificate=./admin.pem \
  --client-key=./admin-key.pem \
  --embed-certs=true \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-context default \
  --cluster=kubernetes \
  --user=cluster-admin \
  --kubeconfig=${KUBE_CONFIG}

kubectl config use-context default --kubeconfig=${KUBE_CONFIG}


#通过kubectl工具查看当前集群组件状态
root@k8s-master1 k8s]# kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-2               Healthy   {"health":"true"}   
etcd-0               Healthy   {"health":"true"}   
etcd-1               Healthy   {"health":"true"} 





#若出现下列情况，可按下面操作
[root@k8s-master1 k8s]# kubectl get cs
NAME                 AGE
etcd-0               <unknown>
scheduler            <unknown>
controller-manager   <unknown>
etcd-2               <unknown>
etcd-1               <unknown>

#从1.16开始就显示为unknow 具体原因:https://segmentfault.com/a/1190000020912684


#临时解决办法（通过模板）
[root@k8s-master1 k8s]# kubectl get cs -o=go-template='{{printf "|NAME|STATUS|MESSAGE|\n"}}{{range .items}}{{$name := .metadata.name}}{{range .conditions}}{{printf "|%s|%s|%s|\n" $name .status .message}}{{end}}{{end}}'
|NAME|STATUS|MESSAGE|
|scheduler|True|ok|
|controller-manager|True|ok|
|etcd-1|True|{"health":"true"}|
|etcd-0|True|{"health":"true"}|
|etcd-2|True|{"health":"true"}|

#查看k8s的名称空间
[root@k8s-master1 k8s]# kubectl get ns
NAME              STATUS   AGE
default           Active   3h21m
kube-node-lease   Active   3h21m
kube-public       Active   3h21m
kube-system       Active   3h21m

六、部署Worker Node

1、创建工作目录并拷贝文件

--------------------node1、node2节点-------------------
[root@k8s-node1 ~]# mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs}

#master将kubelet和kube-proxy拷贝给node1、node2节点
[root@k8s-master k8s]# cd ~/kubernetes/server/bin/
[root@k8s-master bin]# scp kubelet kube-proxy k8s-node1:/opt/kubernetes/bin/

#本地拷贝
[root@k8s-master1 bin]# cp kubelet kube-proxy /opt/kubernetes/bin

上传到/opt/kubernetes/bin下

2、部署kubelet

---------------------master1节点操作---------------------
[root@k8s-master1 bin]# vim /opt/kubernetes/cfg/kubelet.conf
KUBELET_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--hostname-override=k8s-master1 \    #每个节点的ip/名称
--network-plugin=cni \
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \
--config=/opt/kubernetes/cfg/kubelet-config.yml \
--cert-dir=/opt/kubernetes/ssl \
--pod-infra-container-image=lizhenliang/pause-amd64:3.0"

参数说明
•	--hostname-override：显示名称，集群中唯一
•	--network-plugin：启用CNI
•	--kubeconfig：空路径，会自动生成，后面用于连接apiserver
•	--bootstrap-kubeconfig：首次启动向apiserver申请证书
•	--config：配置参数文件
•	--cert-dir：kubelet证书生成目录
•	--pod-infra-container-image：管理Pod网络容器的镜像

#拉取镜像
[root@k8s-master1 bin]# docker pull lizhenliang/pause-amd64:3.0

#配置参数文件
[root@k8s-master1 bin]# vim /opt/kubernetes/cfg/kubelet-config.yml
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local
failSwapOn: false
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /opt/kubernetes/ssl/ca.pem
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
evictionHard:
  imagefs.available: 15%
  memory.available: 100Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
maxOpenFiles: 1000000
maxPods: 110


#授权kubelet-bootstrap用户允许请求证书
kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap


#生成kubelet初次加入集群引导kubeconfig文件
*在生成kubernetes证书的目录下执行以下命令生成kubeconfig文件
[root@k8s-master1 bin]# cd /root/ca/k8s/
[root@k8s-master1 k8s]# KUBE_CONFIG="/opt/kubernetes/cfg/bootstrap.kubeconfig"
[root@k8s-master1 k8s]# KUBE_APISERVER="https://10.8.165.101:6443"   # apiserver的 IP:PORT
[root@k8s-master1 k8s]# TOKEN="c47ffb939f5ca36231d9e3121a252940"    # 与master的token.csv里保持一致

·终端执行（四条）
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-credentials "kubelet-bootstrap" \
  --token=${TOKEN} \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-context default \
  --cluster=kubernetes \
  --user="kubelet-bootstrap" \
  --kubeconfig=${KUBE_CONFIG}

kubectl config use-context default --kubeconfig=${KUBE_CONFIG}

#systemd管理kubelet
[root@k8s-master1 k8s]# vim /usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
After=docker.service

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet.conf
ExecStart=/opt/kubernetes/bin/kubelet $KUBELET_OPTS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

#启动并设置开机启动
systemctl daemon-reload
systemctl enable kubelet
systemctl start kubelet

批准kubelet证书申请并加入集群

-----------------------master1节点-----------------------
# 查看kubelet证书请求
[root@k8s-master1 k8s]# kubectl get csr
NAME                                                   AGE   SIGNERNAME                                    REQUESTOR           CONDITION
node-csr-0UTuuhUTPbL02uDpLinrwBc_YDnmXj3t-JjUqMM247I   78s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending


#批准申请
kubectl certificate approve <申请的NAME>

[root@k8s-master1 k8s]# kubectl certificate approve node-csr-0UTuuhUTPbL02uDpLinrwBc_YDnmXj3t-JjUqMM247I
certificatesigningrequest.certificates.k8s.io/node-csr-0UTuuhUTPbL02uDpLinrwBc_YDnmXj3t-JjUqMM247I approved


[root@k8s-master1 k8s]# kubectl get node
NAME          STATUS     ROLES    AGE   VERSION
k8s-master1   NotReady   <none>   20s   v1.20.4


*注：由于网络插件还没有部署，节点会没有准备就绪 NotReady

3、部署kube-proxy

生成kube-proxy.kubeconfig文件

-------------------master节点-------------------------
#在/root/ca/k8s下创建证书请求文件
[root@k8s-master1 k8s]# vim kube-proxy-csr.json
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}

# 生成证书
[root@k8s-master1 k8s]# 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kubeconfig文件
[root@k8s-master1 k8s]# KUBE_CONFIG="/opt/kubernetes/cfg/kube-proxy.kubeconfig"
[root@k8s-master1 k8s]# KUBE_APISERVER="https://10.8.165.101:6443"

·终端执行（4条）
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-credentials kube-proxy \
  --client-certificate=./kube-proxy.pem \
  --client-key=./kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=${KUBE_CONFIG}

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-proxy \
  --kubeconfig=${KUBE_CONFIG}

kubectl config use-context default --kubeconfig=${KUBE_CONFIG}

配置文件

---------------------master1节点-------------------------

#创建配置文件
[root@k8s-master1 k8s]# vim /opt/kubernetes/cfg/kube-proxy.conf
KUBE_PROXY_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--config=/opt/kubernetes/cfg/kube-proxy-config.yml"

#配置参数文件
[root@k8s-master1 k8s]# vim /opt/kubernetes/cfg/kube-proxy-config.yml
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
metricsBindAddress: 0.0.0.0:10249
clientConnection:
  kubeconfig: /opt/kubernetes/cfg/kube-proxy.kubeconfig
hostnameOverride: k8s-master1
clusterCIDR: 10.244.0.0/16

systemd管理kube-proxy

---------------------master1节点-------------------------

[root@k8s-master1 k8s]# vim /usr/lib/systemd/system/kube-proxy.service
[Unit]
Description=Kubernetes Proxy
After=network.target

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-proxy.conf
ExecStart=/opt/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

#启动并设置开机启动
systemctl daemon-reload
systemctl enable kube-proxy
systemctl start kube-proxy

4、部署网络组件（Calico、flanneld二选一）

Calico（选择）

Calico是一个纯三层的数据中心网络方案，是目前Kubernetes主流的网络方案

#上传yaml文件
链接：https://pan.baidu.com/s/1jPzSdsnFKSFxkVQzc2lQ9g?pwd=x311 
提取码：x311



#部署Calico
[root@k8s-master1 k8s]# cd /opt/kubernetes/cfg/

*上传至/opt/kubernetes/cfg/

[root@k8s-master1 cfg]# kubectl apply -f calico.yaml
[root@k8s-master1 cfg]# kubectl get pods -n kube-system


等Calico Pod都Running，节点也会准备就绪
！！！！！！！！！！！！！！！！！！！！！！！！！！！！！
可能有点久，要初始化创建对应镜像，好几分钟，等吧骚年
waiting......................
！！！！！！！！！！！！！！！！！！！！！！！！！！！！！

[root@k8s-master1 cfg]# kubectl get pods -n kube-system
NAME                                      READY   STATUS    RESTARTS   AGE
calico-kube-controllers-97769f7c7-9d49d   1/1     Running   0          9m16s
calico-node-8djzj                         1/1     Running   0          9m16s

*看网速、看脸    快10分钟了

[root@k8s-master1 cfg]# kubectl get node
NAME          STATUS   ROLES    AGE   VERSION
k8s-master1   Ready    <none>   23m   v1.20.4

flanneld（没选）

--------------------------master1节点-----------------------
/opt/etcd/bin/etcdctl \
--cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem \
--endpoints="https://10.8.165.101:2379,https://10.8.165.102:2379,https://10.8.165.103:2379" \
put /coreos.com/network/config  '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'

-------------------master1、node1、node2节点------------------------
#下载二进制包
链接：https://pan.baidu.com/s/1vSxuXNQZU8yXkcCvDED1Pw?pwd=0ind 
提取码：0ind

[root@k8s-node1 ~]# tar zvxf flannel-v0.13.0-linux-amd64.tar.gz
[root@k8s-node1 ~]# mv flanneld mk-docker-opts.sh /opt/kubernetes/bin


#配置Flannel
[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/flanneld
FLANNEL_OPTIONS="--etcd-endpoints=https://10.8.165.101:2379,https://10.8.165.102:2379,https://10.8.165.103:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem"


#systemd管理Flannel
[root@k8s-node1 ~]# vim /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

#启动flannel和docker
systemctl daemon-reload
systemctl start flanneld
systemctl enable flanneld
systemctl daemon-reload
systemctl restart docker

**报错（Couldn‘t fetch network config）

原因：flanneld目前不能与etcdV3直接交互
参考：https://blog.51cto.com/u_8355320/2564588

#开启etcd 支持V2api功能，在etcd启动参数中加入 --enable-v2参数，并重启etcd2

master、node1、node2都改，并重启
[root@k8s-master etcd]# vim /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd.conf
ExecStart=/opt/etcd/bin/etcd \
--cert-file=/opt/etcd/ssl/server.pem \
--key-file=/opt/etcd/ssl/server-key.pem \
--peer-cert-file=/opt/etcd/ssl/server.pem \
--peer-key-file=/opt/etcd/ssl/server-key.pem \
--trusted-ca-file=/opt/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem \
--logger=zap \
--enable-v2     #此处添加
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

[root@master1 ~]# systemctl daemon-reload
[root@master1 ~]# systemctl restart etcd

·master查看etcd集群健康状况
[root@k8s-master etcd]# ETCDCTL_API=2 /opt/etcd/bin/etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://10.8.165.101:2379,https://10.8.165.102:2379,https://10.8.165.103:2379" cluster-health

#删除原来写入的子网信息
[root@k8s-master etcd]# /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://10.8.165.101:2379,https://10.8.165.102:2379,https://10.8.165.103:2379" del /coreos.com/network/config

#重新使用V2写入子网信息
ETCDCTL_API=2 /opt/etcd/bin/etcdctl \
--ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem \
--endpoints="https://10.8.165.101:2379,https://10.8.165.102:2379,https://10.8.165.103:2379" \
set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'

#重启flanneld服务
systemctl daemon-reload
systemctl start flanneld
systemctl enable flanneld

#修改docker文件
[root@k8s-node1 ~]# vim /usr/lib/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s

[Install]
WantedBy=multi-user.target

#重启docker
systemctl daemon-reload
systemctl restart docker

随后node还是NotReady

通过journalctl -f -u kubelet命令查看，发现没有安装相应的cni模块

因为kubelet配置了network-plugin=cni，但是还没安装，所以状态会是NotReady,不想看这个报错或者不需要网络，就可以修改kubelet配置文件，去掉network-plugin=cni 就可以了。

-----------------------node1、node2节点--------------------
#修改kubelet.conf
[root@k8s-node1 bin]# vim /opt/kubernetes/cfg/kubelet.conf
KUBELET_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--hostname-override=k8s-node1 \
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \
--config=/opt/kubernetes/cfg/kubelet-config.yml \
--cert-dir=/opt/kubernetes/ssl \
--pod-infra-container-image=lizhenliang/pause-amd64:3.0"

#删除之前的kubelet的认证文件
[root@k8s-node1 bin]# rm -rf /opt/kubernetes/ssl/kubelet*

#重启kubelet
[root@k8s-node1 bin]# systemctl restart kubelet


--------------------------master节点----------------------
#重新认证
[root@k8s-master ~]# kubectl get csr
NAME                                                   AGE       REQUESTOR           CONDITION
node-csr-NTYjTGk7zN-oSmSe4mbKuYQXEvvJpOlyIwy2tWwK9GA   29s       kubelet-bootstrap   Pending
node-csr-qVVLrp7PKGSFlA2Q0PGYZBTY_E1FnFoO3K4FGXOIz0Q   18s       kubelet-bootstrap   Pending

[root@k8s-master ~]# /opt/kubernetes/bin/kubectl certificate approve node-csr-NTYjTGk7zN-oSmSe4mbKuYQXEvvJpOlyIwy2tWwK9GA
certificatesigningrequest.certificates.k8s.io/node-csr-NTYjTGk7zN-oSmSe4mbKuYQXEvvJpOlyIwy2tWwK9GA approved
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl certificate approve node-csr-qVVLrp7PKGSFlA2Q0PGYZBTY_E1FnFoO3K4FGXOIz0Q
certificatesigningrequest.certificates.k8s.io/node-csr-qVVLrp7PKGSFlA2Q0PGYZBTY_E1FnFoO3K4FGXOIz0Q approved



#结果
[root@k8s-master ~]# kubectl get csr
NAME                                                   AGE       REQUESTOR           CONDITION
node-csr-NTYjTGk7zN-oSmSe4mbKuYQXEvvJpOlyIwy2tWwK9GA   68s       kubelet-bootstrap   Approved,Issued
node-csr-qVVLrp7PKGSFlA2Q0PGYZBTY_E1FnFoO3K4FGXOIz0Q   57s       kubelet-bootstrap   Approved,Issued

[root@k8s-master ~]# kubectl get node
NAME        STATUS    ROLES     AGE       VERSION
k8s-node1   Ready     <none>    20s       v1.20.4
k8s-node2   Ready     <none>    5s        v1.20.4

5、授权apiserver访问kubelet

#应用场景：例如kubectl logs

[root@k8s-master1 cfg]# vim apiserver-to-kubelet-rbac.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
  name: system:kube-apiserver-to-kubelet
rules:
  - apiGroups:
      - ""
    resources:
      - nodes/proxy
      - nodes/stats
      - nodes/log
      - nodes/spec
      - nodes/metrics
      - pods/log
    verbs:
      - "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: system:kube-apiserver
  namespace: ""
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:kube-apiserver-to-kubelet
subjects:
  - apiGroup: rbac.authorization.k8s.io
    kind: User
    name: kubernetes


[root@k8s-master1 cfg]# kubectl apply -f apiserver-to-kubelet-rbac.yaml

6、新增加Worker Node

拷贝已部署好的Node相关文件到新节点

----------------------master1节点-------------------------

#在Master1节点将Worker Node涉及文件拷贝到node1
[root@k8s-master1 cfg]# scp -r /opt/kubernetes k8s-node1:/opt/
[root@k8s-master1 cfg]# scp -r /usr/lib/systemd/system/{kubelet,kube-proxy}.service k8s-node1:/usr/lib/systemd/system
[root@k8s-master1 cfg]# scp /opt/kubernetes/ssl/ca.pem k8s-node1:/opt/kubernetes/ssl/

------------------------node1节点------------------------
#删除kubelet证书和kubeconfig文件
[root@k8s-node1 ~]# rm -f /opt/kubernetes/cfg/kubelet.kubeconfig
[root@k8s-node1 ~]# rm -f /opt/kubernetes/ssl/kubelet*

*注：这几个文件是证书申请审批后自动生成的，每个Node不同，必须删除


#修改对应文件的主机名
[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/kubelet.conf
--hostname-override=k8s-node1
[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/kube-proxy-config.yml
hostnameOverride: k8s-node1

#启动并设置开机启动
systemctl daemon-reload
systemctl enable kubelet kube-proxy
systemctl start kubelet kube-proxy

---------------------------master1节点--------------------
#在Master1上批准新Node kubelet证书申请

*查看证书请求
[root@k8s-master1 cfg]# kubectl get csr
NAME                                                   AGE   SIGNERNAME                                    REQUESTOR           CONDITION
node-csr-0UTuuhUTPbL02uDpLinrwBc_YDnmXj3t-JjUqMM247I   41m   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Approved,Issued
node-csr-xQsFeNF5nlB-rZQr2cIxFB18ET3kAGYHSC9GMSKDoI8   41s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending

*授权请求（Pending，一定要是待定状态的）
[root@k8s-master1 cfg]# kubectl certificate approve node-csr-xQsFeNF5nlB-rZQr2cIxFB18ET3kAGYHSC9GMSKDoI8
certificatesigningrequest.certificates.k8s.io/node-csr-xQsFeNF5nlB-rZQr2cIxFB18ET3kAGYHSC9GMSKDoI8 approved

#查看Node状态
[root@k8s-master1 cfg]# kubectl get node
NAME          STATUS     ROLES    AGE   VERSION
k8s-master1   Ready      <none>   41m   v1.20.4
k8s-node1     NotReady   <none>   61s   v1.20.4


*发现新加入的k8s-node1节点是NotReady状态，不要急，等待一下，跟master节点一样，Calico在做初始化

*这个时候可以去做node2，跟加入node1的步骤一样，当然最后也要等！！！

最终加入结果

#查看名称空间kube-system中的pod情况
[root@k8s-master1 cfg]# kubectl get pods -n kube-system
NAME                                      READY   STATUS    RESTARTS   AGE
calico-kube-controllers-97769f7c7-9d49d   1/1     Running   0          42m
calico-node-8djzj                         1/1     Running   0          42m
calico-node-h6ghf                         1/1     Running   0          15m
calico-node-nj9l7                         1/1     Running   0          8m1s


#查看Node状态
[root@k8s-master1 cfg]# kubectl get node
NAME          STATUS   ROLES    AGE     VERSION
k8s-master1   Ready    <none>   56m     v1.20.4
k8s-node1     Ready    <none>   16m     v1.20.4
k8s-node2     Ready    <none>   8m25s   v1.20.4