Kubernetes上安装KubeSphere

1.安装Docker

sudo yum remove docker*
sudo yum install -y yum-utils
#配置docker的yum地址
sudo yum-config-manager \
--add-repo \
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
#查看当前镜像源中支持的docker版本
yum list docker-ce --showduplicates
#安装指定版本
sudo yum install -y docker-ce-20.10.8 docker-ce-cli-20.10.8 containerd.io-1.4.8
#启动&开机启动docker
systemctl enable docker --now
# docker加速配置
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://82m9ar63.mirror.aliyuncs.com"],
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

2.安装Kubernetes

2.1基本环境

每个机器使用内网ip互通
每个机器配置自己的hostname，不能用localhost

#设置每个机器自己的hostname
hostnamectl set-hostname kht121

# 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

#关闭swap
swapoff -a  
sed -ri 's/.*swap.*/#&/' /etc/fstab

#允许 iptables 检查桥接流量
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sudo sysctl --system

2.2安装kubelet、kubeadm、kubectl

#配置k8s的yum源地址
cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
   http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

#查看当前镜像源中支持的kubelet版本
yum list kubelet --showduplicates

#安装 kubelet，kubeadm，kubectl
sudo yum install -y kubelet-1.23.10 kubeadm-1.23.10 kubectl-1.23.10

#启动kubelet
sudo systemctl enable --now kubelet

#所有机器配置master域名
echo "192.168.2.121  kht121" >> /etc/hosts

2.3初始化master节点

kubeadm init \
--apiserver-advertise-address=192.168.2.121 \
--control-plane-endpoint=k8s-master \
--image-repository registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images \
--kubernetes-version v1.23.10 \
--service-cidr=10.96.0.0/16 \
--pod-network-cidr=192.168.0.0/16

2.4记录关键信息