集群部署

环境准备

各个机器设置自己的域名

hostnamectl set-hostname k8s-master01

hostnamectl set-hostname k8s-node01

hostnamectl set-hostname k8s-node02

所有机器执行

# 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

#打开ip转发
echo 1 > /proc/sys/net/ipv4/ip_forward

安装 kubelet、kubeadm、kubectl

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
exclude=kubelet kubeadm kubectl
EOF

sudo yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes

sudo systemctl enable --now kubelet

版本

 kubeadm.x86_64 0:1.23.5-0       kubectl.x86_64 0:1.23.5-0       kubelet.x86_64 0:1.23.5-0

卸载

yum remove -y kubelet kubeadm kubectl
kubeadm reset -f
modprobe -r ipip
lsmod
rm -rf ~/.kube/
rm -rf /etc/kubernetes/
rm -rf /etc/systemd/system/kubelet.service.d
rm -rf /etc/systemd/system/kubelet.service
rm -rf /usr/bin/kube*
rm -rf /etc/cni
rm -rf /opt/cni
rm -rf /var/lib/etcd
rm -rf /var/etcd

安装Kubernetes

echo "172.21.0.6  cluster-endpoint" >> /etc/hosts

主节点

kubeadm init \
--apiserver-advertise-address=172.21.0.6 \
--control-plane-endpoint=cluster-endpoint \
--image-repository registry.cn-hangzhou.aliyuncs.com/google_containers 
--service-cidr=10.96.0.0/16 \
--pod-network-cidr=192.168.0.0/16

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 cluster-endpoint:6443 --token 95518m.djo1uufc2q3tt4gz \
        --discovery-token-ca-cert-hash sha256:080934642e32fa52f053eaf8835fa31b7379c728a1aef70a37028475f33236b2 \
        --control-plane

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

kubeadm join cluster-endpoint:6443 --token 95518m.djo1uufc2q3tt4gz \
        --discovery-token-ca-cert-hash sha256:080934642e32fa52f053eaf8835fa31b7379c728a1aef70a37028475f33236b2

kubeadm token create --print-join-command

节点

kubeadm join cluster-endpoint:6443 --token 95518m.djo1uufc2q3tt4gz \
        --discovery-token-ca-cert-hash sha256:080934642e32fa52f053eaf8835fa31b7379c728a1aef70a37028475f33236b2