K8S加入新的node节点实现方式

# 关闭防火墙
systemctl stop firewalld 
systemctl disable firewalld
# 关闭selinux
sed -i 's/enforcing/disabled/' /etc/selinux/config  # 永久
setenforce 0  # 临时
# 关闭swap
swapoff -a  # 临时
sed -ri 's/.*swap.*/#&/' /etc/fstab    # 永久
# 根据规划设置主机名 node1
# hostnamectl set-hostname <hostname>
hostnamectl set-hostname node1
# 在新的node1修改hosts ，并同步到原有的master，node上
cat >> /etc/hosts << EOF
192.168.136.131 master
192.168.136.132 node
192.168.136.136 node1
EOF
#设置免密登陆,在master上执行
ssh-copy-id node1
# 将桥接的IPv4流量传递到iptables的链
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system  # 生效
# 时间同步
yum install ntpdate -y
ntpdate time.windows.com

wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
yum -y install docker-ce
systemctl enable docker && systemctl start docker

cat > /etc/docker/daemon.json << EOF
{
  "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}
EOF

systemctl daemon-reload
systemctl restart docker
docker info

cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

yum install -y kubelet-1.20.4 kubeadm-1.20.4 
systemctl enable kubelet

docker load -i k8s-images-v1.20.4.tar.gz

docker images

kubeadm token create --print-join-command

kubeadm join 192.168.136.131:6443 --token 7419pd.7f1t458gunw31062     --discovery-token-ca-cert-hash sha256:e2426645cc62d3ef06e722d9cc464ecdb32bdb840a3a88d6d8989eb8cf5b1835

kubectl get nodes