Kubernetes 1.25.2 安装

1、准备服务器

ip: 172.22.21.20，172.22.21.21，172.22.21.22

2、关闭防火墙

1.  
   systemctl stop firewalld
2.  
   systemctl disable firewalld

3、关闭swap分区

1.  
   swapoff -a # 临时
2.  
   vim /etc/fstab # 永久, 注释掉swap那一行

4、关闭selinux

1.  
   setenforce 0 # 临时
2.  
   sed -i 's/enforcing/disabled/' /etc/selinux/config # 永久

5、配置hosts

1.  
   cat >> /etc/hosts << EOF
2.  
   172.22.21.20 master
3.  
   172.22.21.21 slaver01
4.  
   172.22.21.22 slaver02
5.  
   EOF

6、修改iptables

1.  
   cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
2.  
   overlay
3.  
   br_netfilter
4.  
   EOF
5.  
    
6.  
   modprobe overlay
7.  
   modprobe br_netfilter
8.  
    
9.  
    
10.  
    cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
11.  
    net.bridge.bridge-nf-call-iptables = 1
12.  
    net.bridge.bridge-nf-call-ip6tables = 1
13.  
    net.ipv4.ip_forward = 1
14.  
    EOF
15.  
     
16.  
    sysctl --system

7、安装docker

yum install -y yum-utils   device-mapper-persistent-data   lvm2

yum-config-manager     --add-repo     https://download.docker.com/linux/centos/docker-ce.repo

yum list docker-ce --showduplicates | sort -r

yum install docker-ce-18.09.6 docker-ce-cli-18.09.6 containerd.io

1.  
   systemctl start docker # 启动 docker服务
2.  
    
3.  
   systemctl enable docker # 设置开机启动 docker

8、修改镜像源并禁掉cgroup

1.  
   mkdir -p /etc/docker
2.  
    
3.  
   cd /etc/docker && vim daemon.json
4.  
    
5.  
   # 修改文件
6.  
   {
7.  
   "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"],
8.  
   "exec-opts": ["native.cgroupdriver=systemd"]
9.  
   }

9、启动并配置docker自启动

1.  
   systemctl restart docker
2.  
   docker --version
3.  
   docker info

10、安装cri-docker、

10.1 下载rpm

https://github.com/Mirantis/cri-dockerd/releases/download/v0.2.6/cri-dockerd-0.2.6-3.el7.x86_64.rpm

10.2 安装cri-dockerd

rpm -ivh cri-dockerd-0.2.6-3.el7.x86_64.rpm

10.3 修改service文件

1.  
   vim /usr/lib/systemd/system/cri-docker.service
2.  
   ExecStart=/usr/bin/cri-dockerd --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/谷歌_containers/pause:3.8 --container-runtime-endpoint

10.4 启动cri-docker

systemctl start cri-docker && systemctl enable cri-docker

11、安装k8s

1.  
   cat > /etc/yum.repos.d/kubernetes.repo << EOF
2.  
   [kubernetes]
3.  
   name=Kubernetes
4.  
   baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
5.  
   enabled=1
6.  
   gpgcheck=0
7.  
   repo_gpgcheck=0
8.  
   gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
9.  
   https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
10.  
    EOF
11.  
     
12.  
    yum install -y kubelet-1.25.2 kubeadm-1.25.2 kubectl-1.25.2
13.  
    systemctl enable kubelet

12、部署master节点

1.  
   kubeadm reset --cri-socket=unix:///var/run/cri-dockerd.sock
2.  
    
3.  
   kubeadm init \
4.  
   --apiserver-advertise-address=172.22.21.20 \
5.  
   --image-repository registry.aliyuncs.com/谷歌_containers \
6.  
   --kubernetes-version v1.25.2 \
7.  
   --service-cidr=10.96.0.0/12 \
8.  
   --pod-network-cidr=10.244.0.0/16
9.  
   --cri-socket unix:///var/run/cri-dockerd.sock
10.  
     
11.  
    export KUBECONFIG=/etc/kubernetes/admin.conf
12.  
     
13.  
    # 安装 Pod 网络插件(CNI)
14.  
    wget https://docs.projectcalico.org/manifests/calico.yaml
15.  
    kubectl apply -f calico.yaml

13、其他节点加入集群

kubeadm join 172.22.21.20:6443 --token 5r5fib.00mlurgn42d0jfo4 --discovery-token-ca-cert-hash sha256:a82b499d9d6dd54bace49998bea48de68a17f312eb4752ab694680502c2befce --cri-socket=unix:///var/run/cri-docerd.sock

14、如果想master节点可以部署pod的话，需要执行下面命令

kubectl taint nodes --all node-role.kubernetes.io/control-plane-

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