1、文件准备

安装docker

yum install -y docker

systemctl status docker

增加docker国内镜像源

vi /etc/docker/daemon.json

添加内容为：

{
"registry-mirrors":["https://hub-mirror.c.163.com","https://registry.aliyuncs.com","https://registry.docker-cn.com","https://docker.mirrors.ustc.edu.cn"]
}

然后执行：

systemctl daemon-reload
systemctl restart docker

获取部署k3s文件

文件准备，例如k3s，install.sh。

curl https://raw.githubusercontent.com/rancher/k3s/master/install.sh -o install.sh

wget https://github.com/k3s-io/k3s/releases/download/v1.23.16%2Bk3s1/k3s

2、安装master节点

chmod 777 install.sh k3s
cp k3s /usr/local/bin
INSTALL_K3S_MIRROR=cn INSTALL_K3S_SKIP_DOWNLOAD=true ./install.sh
kubectl get nodes

3、安装agent节点

获取master节点上的token：

cat /var/lib/rancher/k3s/server/node-token

在master和agent节点上都需要关闭防火墙：

systemctl stop firewalld.service

chmod 777 install.sh k3s
cp k3s /usr/local/bin
INSTALL_K3S_MIRROR=cn K3S_URL=https://197.168.11.31:6443 K3S_TOKEN=K10782535704e853507bd8d210a9710456a621e3d6784cb95979b2f43b7364b089e::server:6a3761aeb2b4ca6011adf204d5f0a735 INSTALL_K3S_SKIP_DOWNLOAD=true ./install.sh

4、查看详情信息

kubectl get nodes -o wide

5、遇到问题

自Kubernetes1.24以后，K8S就不再原生支持docker。

配置INSTALL_K3S_EXEC="--docker"不在支持。

failed to pull image "rancher/mirrored-pause:3.6"...。（k3s通过containerd容器部署）

如果在master节点出现上述问题，解决方案：

cat >> /etc/rancher/k3s/registries.yaml <<EOF
mirrors:
  "docker.io":
    endpoint:
      - "https://registry.cn-hangzhou.aliyuncs.com"
      - "https://ustc-edu-cn.mirror.aliyuncs.com"
EOF
 
systemctl restart k3s

如果在agent节点上出现上述问题，解决方案：

cd /etc/rancher/
mkdir k3s
cd

cat >> /etc/rancher/k3s/registries.yaml <<EOF
mirrors:
  "docker.io":
    endpoint:
      - "https://registry.cn-hangzhou.aliyuncs.com"
      - "https://ustc-edu-cn.mirror.aliyuncs.com"
EOF