K8S环境配置,换国内源插件

需要3个节点的K8S环境做实验,总结了搭建步骤,主要麻烦在各种源节点在国外,需要换各种国内源,dockerhub,cni插件,master初始化各种组件下不下来,手动在阿里云下载需要的组件,改tag,版本要一致

系统:ubuntu 20 server

 

规划: master-192.168.1.230

     node1-192.168.1.231

     node2-192.168.1.232

 

系统初始化(包括master和node):

     1.关闭防火墙

     2.关闭swap vim /etc/fstab  注释swap相关永久关闭

     3.设置主机名字 hostnamectl set-hostname

     4.master和node添加/etc/hosts ip和主机名对应关系

     5.将桥接的 IPv4 流量传递到 iptables 的链

       cat > /etc/sysctl.d/k8s.conf << EOF net.bridge.bridge-nf-call-ip6tables =1                    

       net.bridge.bridge-nf-call-iptables = 1

       EOF

       sudo sysctl --system

     6.时间同步

     7.安装docker kubelet kubeadm(master和node)

              sudo apt update sudo apt install docker.io sudo systemctl start docker sudo         systemctl enable docker

               

sudo apt-get update && sudo apt-get install -y ca-certificates curl software-properties-common apt-transport-https curl

curl -s https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo apt-key add - sudo tee /etc/apt/sources.list.d/kubernetes.list <<EOF deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main

EOF

sudo apt-get update

sudo apt-get install -y kubelet kubeadm kubectl

sudo apt-mark hold kubelet kubeadm kubectl

 

     8.初始化master :

             kubeadm init \

--apiserver-advertise-address=192.168.1.230 \

--image-repository registry.aliyuncs.com/google_containers \

--service-cidr=10.96.0.0/12 \

--pod-network-cidr=10.244.0.0/16

镜像下载失败的,可以手动dockerhub下载同版本的该tag

 

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

 

     10.安装cni插件(使用calico)

             kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml

     11:查看工作节点是否准备完成全部running状态,全部running后集群搭建成功

             kubectl get pods -n kube-system