K8S安装及配置教程

# 安装yum-utils包（提供yum-config-manager 实用程序）并设置稳定存储库
sudo yum install -y yum-utils 
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
# 安装Docker
sudo yum install  --allowerasing docker-ce docker-ce-cli containerd.io
# 启动Docker
sudo systemctl start docker
# 允许开机启动Docker
sudo systemctl enable docker

# /etc/docker创建daemon.json并添加
{
    "registry-mirrors":[
          "https://f1z25q5p.mirror.aliyuncs.com",
          "https://hub-mirror.c.163.com",
          "https://reg-mirror.qiniu.com",
          "https://docker.mirrors.ustc.edu.cn"
        ],
    "exec-opts": ["native.cgroupdriver=systemd"]  
}
# 控制台执行
sudo systemctl daemon-reload
sudo systemctl restart docker

cat <<EOF | sudo tee /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
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl
EOF
# 将 SELinux 设置为 permissive 模式（相当于将其禁用）
sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
sudo yum install -y kubelet-1.23.8 kubeadm-1.23.8 kubectl-1.23.8 --disableexcludes=kubernetes
sudo systemctl enable --now kubelet

swapoff -a # 关闭swapoff
sed -ri 's/.*swap.*/#&/' /etc/fstab # 永久关闭
cat > /etc/containerd/config.toml <<EOF
[plugins."io.containerd.grpc.v1.cri"]
  systemd_cgroup = true
EOF
systemctl restart containerd

# 创建/etc/sysctl.d/k8s.conf文件，并添加以下内容：
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward = 1

# 应用这些设置而不重启系统
modprobe br_netfilter
sysctl --system

# 创建开机启动服务 /etc/systemd/system/ load-br_netfilter.service
[Unit]
Description=Load br_netfilter kernel module
[Service]
Type=oneshot
ExecStart=/sbin/modprobe br_netfilter
[Install]
WantedBy=multi-user.target

sudo systemctl enable load-br_netfilter.service
sudo systemctl start load-br_netfilter.service

kubeadm init --image-repository registry.cn-hangzhou.aliyuncs.com/google_containers --kubernetes-version=v1.23.8 --v=6

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

kubeadm join 192.168.157.145:6443 --token gr2zor.rzccoywhm3hx2s1i \
        --discovery-token-ca-cert-hash sha256:d1583128f52c101bd9a851f4f0f789634b2463bf3f9f72987beae44248e5f966
# 创建新令牌
kubeadm token create --print-join-command

 kubectl get nodes