一、节点基本配置
1、准备操作系统
2、 修改主机名
hostnamectl set-hostname master-1
hostnamectl set-hostname node1
hostnamectl set-hostname node2#验证hostnamectl status3、修改/etc/hosts
cat <<EOF >>/etc/hosts
192.168.255.137 master-1
192.168.255.131 node1
192.168.255.132 node2
EOF4、安装docker-ce
# 安装docker所需的工具yum install -y yum-utils device-mapper-persistent-data lvm2# 配置阿里云的docker源yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo# 指定安装这个版本的docker-ceyum install -y docker-ce-20.10.0 docker-ce-cli-20.10.0 containerd.io# 启动dockersystemctl enable docker && systemctl start docker5、配置docker镜像源及cgroup 驱动与系统匹配
cat <<EOF > /etc/docker/daemon.json
{"registry-mirrors": ["https://docker.m.daocloud.io","https://noohub.ru","https://huecker.io","https://dockerhub.timeweb.cloud","https://docker.rainbond.cc","https://docker.1ms.run","https://docker.1panel.live","https://hub1.nat.tf","https://docker-0.unsee.tech","https://docker.1panel.live","https://registry.dockermirror.com","https://docker.imgdb.de","https://docker.m.daocloud.io"],"exec-opts": ["native.cgroupdriver=systemd"]
}
EOF#重启docker
systemctl restart docker6、配置k8s搭建条件
# 关闭防火墙systemctl disable firewalld
systemctl stop firewalld# 临时禁用selinuxsetenforce 0# 永久关闭 修改/etc/sysconfig/selinux文件设置sed -i 's/SELINUX=permissive/SELINUX=disabled/' /etc/sysconfig/selinux
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config# 禁用交换分区swapoff -a# 永久禁用，打开/etc/fstab注释掉swap那一行sed -i 's/.*swap.*/#&/' /etc/fstab# 修改内核参数cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system7、安装3k：kubeadm、kubelet、kubectl
# 执行配置k8s阿里云源cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF# 安装kubeadm、kubectl、kubeletyum install -y kubelet-1.23.6 kubeadm-1.23.6 kubectl-1.23.6# 启动kubelet服务systemctl enable kubelet && systemctl start kubelet二、配置Master管理节点
1、初始化
使用以下命令初始化k8s
kubeadm init --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.23.6 --apiserver-advertise-address 192.168.255.137 --pod-network-cidr=10.244.0.0/16 --token-ttl 0# 下载管理节点中用到的6个docker镜像，你可以使用docker images查看到。这里需要等待两分钟，会卡在[preflight] You can also perform this action in beforehand using ''kubeadm config images pull初始化完成后会生成如下命令
master 节点依次执行截图上面三条命令
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config测试，查看节点，出现master节点
kubectl get node
2、安装网络插件
上面虽然master节点都有了，但是状态是“NotReady”，这就需要master节点安装以下两个网络插件：calico、flannel
安装网络插件需要配置网络访问环境
export http_proxy="http://192.168.255.1:7890"
export https_proxy="http://192.168.255.1:7890"unset http_proxy
unset https_proxycalico
#安装wget
yum install -y wget
#下载calico两个配置
wget https://raw.githubusercontent.com/projectcalico/calico/v3.26.0/manifests/tigera-operator.yaml
wget https://raw.githubusercontent.com/projectcalico/calico/v3.26.0/manifests/custom-resources.yaml
#取消代理后，执行kubectl命令，下面两条命令顺序不能错！
kubectl create -f tigera-operator.yaml
kubectl create -f custom-resources.yamlflannel
#设置代理执行下面的命令
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
#取消代理执行kubectl
kubectl apply -f kube-flannel.yml
以上两个插件安装完毕，一切顺利的话，会如下图所示，状态变成“Ready”，大功告成！
