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k8s原来这么简单（二）安装k8s1.23集群

官方文档：安装 kubeadm 安装条件

  1. 多台Linux机器 CentOS7
  2. 2G以上RAM，2个以上CPU
  3. 集群网络互通，可访问外网
  4. 关闭防火墙，关闭swap分区
准备安装环境
node IP
k8s-master 192.168.43.111
k8s-node1 192.168.43.112
k8s-node2 192.168.43.113
以下命令在三个主机上运行
关闭防火墙
systemctl stop firewalld && systemctl disable firewalld

关闭selinux
sed -i 's/enforcing/disabled/' /etc/selinux/config # 永久 setenforce 0 # 临时

关闭swap
swapoff -a # 临时 vi /etc/fstab # 永久

设置主机名
hostnamectl set-hostname

添加hosts
cat >> /etc/hosts << EOF 192.168.43.111 k8s-master 192.168.43.112 k8s-node1 192.168.43.113 k8s-node2 EOF

允许 iptables 检查桥接流量
cat <

cat <

sudo sysctl --system

安装Docker
yum install wget -y wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo yum -y install docker-ce systemctl enable docker && systemctl start docker

配置Docker
cat > /etc/docker/daemon.json << EOF { "exec-opts": ["native.cgroupdriver=systemd"], "log-driver": "json-file", "log-opts": { "max-size": "100m" }, "storage-driver": "overlay2", "registry-mirrors": ["https://vydiw6v2.mirror.aliyuncs.com"] } EOF


systemctl restart docker

安装kubeadm，kubelet和kubectl
添加阿里yum源
cat > /etc/yum.repos.d/kubernetes.repo << EOF [kubernetes] name=Kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=0 repo_gpgcheck=0 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF


sudo yum install -y kubelet-1.23.0 kubeadm-1.23.0 kubectl-1.23.0 --disableexcludes=kubernetes sudo systemctl enable --now kubelet


以下命令在master主机上运行
初始化master
https://kubernetes.io/zh/docs/reference/setup-tools/kubeadm/kubeadm-init/ kubeadm init \ --apiserver-advertise-address=192.168.43.111 \ --image-repository registry.aliyuncs.com/google_containers \ --kubernetes-version v1.23.0 \ --service-cidr=10.96.0.0/12 \ --pod-network-cidr=10.244.0.0/16 \ --ignore-preflight-errors=all vi /etc/profile export KUBECONFIG=/etc/kubernetes/admin.conf source /etc/profile


kubectl get nodes

【k8s原来这么简单（二）安装k8s1.23集群】
以下命令在node主机上运行
加入node 执行master init之后的join命令
kubeadm join 192.16...........


重新获取join命令
kubeadm token create --print-join-command


master上安装容器网络
https://kubernetes.io/zh/docs/concepts/cluster-administration/networking/#how-to-implement-the-kubernetes-networking-model
wget https://projectcalico.docs.tigera.io/manifests/tigera-operator.yaml --no-check-certificate wget https://projectcalico.docs.tigera.io/manifests/custom-resources.yaml --no-check-certificate


修改pod网络calicoNetwork
kubectl create -f tigera-operator.yaml kubectl create -f custom-resources.yaml


验证
kubectl get pods -n kube-system

kubectl get nodes -o wide


测试集群
kubectl create deployment nginx --image=nginx kubectl expose deployment nginx --port=80 --type=NodePort kubectl get pod,svc

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