kubernetes1.20搭建笔记

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


#安装指定版本
sudo yum install -y docker-ce-20.10.7 docker-ce-cli-20.10.7 containerd.io-1.4.6

#	启动&开机启动docker
systemctl enable docker --now

# docker加速配置
# registry-mirrors 自己的阿里云镜像加速地址
# insecure-registries 私有镜像仓库
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://mbwkeham.mirror.aliyuncs.com"],
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2",
  "insecure-registries": ["192.168.2.1"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

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 xxx

# 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 < 
2、安装kubelet、kubeadm、kubectl 
#配置k8s的yum源地址
cat <> /etc/hosts
 
3、初始化master节点 
1、初始化 
kubeadm init 
--apiserver-advertise-address=192.168.2.xx 
--control-plane-endpoint=k8s-master 
--image-repository registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images 
--kubernetes-version v1.20.9 
--service-cidr=10.96.0.0/16 
--pod-network-cidr=192.168.0.0/16
 
2、记录关键信息 
Your Kubernetes control-plane has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

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

Alternatively, if you are the root user, you can run:

  export KUBEConFIG=/etc/kubernetes/admin.conf

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

You can now join any number of control-plane nodes by copying certificate authorities
and service account keys on each node and then running the following as root:

  kubeadm join k8s-master:6443 --token n8yyni.ce0wen7wuyyb4nro 
    --discovery-token-ca-cert-hash sha256:feaae18ddacfe6971bf3030af54b145ad8c5937c06344920245d8b9f55644668 
    --control-plane 

Then you can join any number of worker nodes by running the following on each as root:

kubeadm join k8s-master:6443 --token n8yyni.ce0wen7wuyyb4nro 
    --discovery-token-ca-cert-hash sha256:feaae18ddacfe6971bf3030af54b145ad8c5937c06344920245d8b9f55644668
 
3、安装Calico网络插件 
curl https://docs.projectcalico.org/manifests/calico.yaml -O

kubectl apply -f calico.yaml
 
4、加入worker节点 
kubeadm join k8s-master:6443 --token n8yyni.ce0wen7wuyyb4nro 
    --discovery-token-ca-cert-hash sha256:feaae18ddacfe6971bf3030af54b145ad8c5937c06344920245d8b9f55644668
 
令牌过期可使用命令重新生产
 
#新令牌
kubeadm token create --print-join-command