1.kernel升级
升级到5.4.217
rpm –import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
yum –enablerepo=elrepo-kernel install kernel-lt -y
grub2-mkconfig
grub2-set-default 0
2.k8s安装
2.1 关闭交换分区
swapoff -a
sed -i ‘/ swap / s/^\(.*\)$/#\1/g’ /etc/fstab
2.2 安装kubelet kubeadm kubectl
准备repo
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
yum install -y kubelet kubeadm kubectl –disableexcludes=kubernetes
systemctl enable kubelet && systemctl start kubelet
2.3 转发 IPv4 并让 iptables 看到桥接流量
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF
sudo modprobe overlay
sudo modprobe br_netfilter
# 设置所需的 sysctl 参数，参数在重新启动后保持不变
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward = 1
EOF
# 应用 sysctl 参数而不重新启动
sudo sysctl –system
2.4 安装containerd
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager –add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install docker-ce docker-ce-cli containerd.io docker-compose-plugin
#生成默认配置文件并修改
containerd config default | tee /etc/containerd/config.toml
#修改config.toml
SystemdCgroup= true
sandbox_image = “registry.aliyuncs.com/google_containers/pause:3.6”
#重启服务
systemctl daemon-reload
systemctl restart crictl
cat >/etc/crictl.yaml<<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
EOF
#验证containerd是否配置正确
crictl pull nginx:1.15
3.kubeadm创建集群
3.1kubeadm集群初始化
#192.168.1.149 master节点执行
kubeadm init –apiserver-advertise-address=192.168.1.149 –kubernetes-version v1.25.2 –image-repository registry.aliyuncs.com/google_containers –service-cidr=10.11.0.0/16 –pod-network-cidr=10.22.0.0/16
3.2添加node节点
192.168.1.150
192.168.1.151
分别在150,151 节点执行
kubeadm join 192.168.1.149:6443 –token p7a3ok.jdl6wyan4dhc2sss –discovery-token-ca-cert-hash sha256:dae786d25a3997ed8dd9e20a261f390d5a71625c4970a644f112a6b70fc54380
kubeadm join 192.168.1.149:6443 –token p7a3ok.jdl6wyan4dhc2sss –discovery-token-ca-cert-hash sha256:dae786d25a3997ed8dd9e20a261f390d5a71625c4970a644f112a6b70fc54380
4.helm安装
wget https://get.helm.sh/helm-v3.4.1-linux-amd64.tar.gz
tar -xzvf helm-v3.4.1-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/
5.k8s时区修改
helm repo add k8tz https://k8tz.github.io/k8tz/
helm install k8tz k8tz/k8tz –set timezone=Asia/Shanghai
6.安装网络插件calico
wget https://docs.projectcalico.org/manifests/calico.yaml
kubectl apply -f calico.yaml
原文地址：http://www.cnblogs.com/52shaidan/p/k8tz.html
