k8s 搭建

yum remove docker*
 yum install -y yum-utils
  yum -config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
 yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
  yum install -y docker-ce-20.10.7 docker-ce-cli-20.10.7 containerd.io-1.4.6
   systemctl daemon-reload
 systemclt restart docker
  systemctl restart docker
 docker info
 systemctl stop firewalld
  systemctl disable firewalld
   systemctl status firewalld
   setenforce 0
    sed -i 's^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
  sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
    grep SELINUX /etc/selinux/config 
 swapoff -a 
  sed -ri 's/.*swap.*/#&/' /etc/fstab
  systemctl reboot
 free -m
   hostnamectlreconnect
   hostnamectl set-hostname k8s-master

cat >> /etc/hosts << EOF
192.168.19.129 k8s-master
192.168.19.130 k8s-node1
192.168.19.131 k8s-node2
EOF

cat << EOF | tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF

#允许iptables 检查桥接流量
cat << EOF | tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

sysctl --system

# 设置时间同步
yum install ntpdate -y
ntpdate time.windows.com

# 配置k8s  yum 源
cat <<EOF | 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

yum remove -y kubelet kubeadm kubectl
yum list kublet --showduplicates | sort -r 
yum install -y kubelet-1.20.9 kubeadm-1.20.9 kubectl-1.20.9


tee ./images.sh << 'EOF'
#!/bin/bash
images=(
kube-apiserver:v1.20.9
kube-proxy:v1.20.9
kube-controller-manager:1.20.9
kube-scheduler:v1.20.9
coredns:1.7.0
etcd:3.4.13-0
pause:3.2
)
for imageName in ${images[@]};do
docker pull registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/$imageName


## master 执行
kubeadm init --apiserver-advertise-address=192.168.19.129 \
--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=10.244.0.0/16
done
EOF

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


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 ex9ibk.kye5sdwmmplf5owg \
    --discovery-token-ca-cert-hash sha256:f3e2de7e5cd711157b79c2bf53433eb1dd11ee3021911b660aab6925fb2e83bc \
    --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 ex9ibk.kye5sdwmmplf5owg \
    --discovery-token-ca-cert-hash sha256:f3e2de7e5cd711157b79c2bf53433eb1dd11ee3021911b660aab6925fb2e83bc 
[root@localhost ~]# 
##重新生成 token
kubeadm token create --print-join-command

#网络插件
curl https://docs.projectcalico.org/archive/v3.20/manifests/calico.yaml -O

kubectl apply -f calico.yaml

#quay.io 开放下载

### 手动下载
  210  docker pull quay.io/calico/pod2daemon-flexvol:v3.20.6
  211  docker images
  212  docker tag quay.io/calico/pod2daemon-flexvol:v3.20.6 calico/pod2daemon-flexvol:v3.20.6
  213  set- o vi
  214  set -o vi
  215  docker images
  216  set -o vi
  217  docker pull quay.io/calico/node:v3.20.6 calico/kube-controllers:v3.20.6
  218  docker image
  219  docker images
  220  docker tag quay.io/calico/node:v3.20.6 calico/node:v3.20.6
  221  docker images
  222  docker pull quay.io/calico/kube-controllers:v3.20.6
  223  docker tag quay.io/calico/kube-controllers:v3.20.6 calico/kube-controllers:v3.20.6
  224  history

#升级内核
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm

wget https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.1/cri-dockerd-0.3.1-3.e17.x86_64.rpm