[Cloud Native] Install K8s on CentOS

Установка K8s на CentOS

建议配置docker 加速器

https://www.jianshu.com/p/1a4025c5f186

本文参考网址：

https://www.techrepublic.com/article/how-to-install-a-kubernetes-cluster-on-centos-7/

关闭防火墙 systemctl stop firewalld systemctl disable firewalld # 禁用SELINUX setenforce 0 sed -i --follow-symlinks 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux # 关闭swap `` swapoff -a ## 或永久关闭 vi /etc/fstab comment this line # /dev/mapper/centos-swap swap swap defaults 0 0 ```

设置br_netfilter modprobe br_netfilter echo '1' > /proc/sys/net/bridge/bridge-nf-call-iptables # 添加yum源 vi /etc/yum.repos.d/kubernetes.repo 添加内容如下-建议从本文参考网址拷贝如下内容，防止格式差异(本文第四行)： `` [kubernetes] name=Kubernetes baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg 阿里云源20191230更新 [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 ```

查看可用版本 yum list kubelet --showduplicate # 然后安装 then install ``` yum install -y kubelet kubeadm kubectl yum install -y kubelet-1.17.13-0 kubeadm-1.17.13-0 kubectl-1.17.13-0 yum install -y kubelet-1.13.5-0 kubeadm-1.13.5-0 kubectl-1.13.5-0 –skip-broken

systemctl daemon-reload systemctl enable kubelet systemctl restart kubelet ``''

kubeadm init启动，参考

https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/ echo '1' > /proc/sys/net/bridge/bridge-nf-call-iptables sudo bash -c 'echo 1 > /proc/sys/net/ipv4/ip_forward' echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables 用阿里云的镜像启动 建立一个配置文件 #cat init-config.yaml apiVersion: kubeadm.k8s.io/v1beta1 kind: ClusterConfiguration kubernetesVersion: v1.16.4 imageRepository: registry.aliyuncs.com/google_containers

kubeadm config images pull –config=init-config.yaml

— ### kubadm init: ``` calico:作为网络组件 –pod-network-cidr=192.168.0.0/16 kubeadm init –pod-network-cidr=192.168.0.0/16 –kubernetes-version=v1.17.13 –image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers kubeadm init –kubernetes-version=v1.17.13 –image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers kubeadm init –pod-network-cidr=192.168.0.0/17 –service-cidr=192.168.128.0/17 –kubernetes-version=v1.17.13 –image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers

kubeadm init –pod-network-cidr=192.168.0.0/16 –kubernetes-version=v1.17.13 –image-repository=registry.aliyuncs.com/google_containers kubeadm init –network-plugin=cni –kubernetes-version=v1.17.13 –image-repository=registry.aliyuncs.com/google_containers kubeadm init –kubernetes-version=v1.17.13 –image-repository=registry.aliyuncs.com/google_containers

calico： kubectl apply -f https://docs.projectcalico.org/archive/v3.14/manifests/calico.yaml

kubectl taint nodes –all node-role.kubernetes.io/master-

重新生成join语句 kubeadm token create –print-join-command –ttl=0

kubeadm join 172.16.20.199:6443 –token jncgw9.7bbex0rp5hah979y –discovery-token-ca-cert-hash sha256:a80e18efa6f775291373ba56142a9bc27514fd3917a0508ec429238a6e85e23d 常用命令： kubectl get pod –namespace=kube-system kubectl describe po kubernetes-dashboard-77fd78f978-kkffb –namespace=kube-system

Ссылка на документацию по Calico, которую я использовал для установки Calico v3.14.0, выглядит так: kubectl apply -f https://docs.projectcalico.org/v3.14.0/manifests/calico-typha.yaml kubectl apply -f https://docs.projectcalico.org/v3.14.0/manifests/calicoctl.yaml ```''

查看集群信息 ``` kubectl cluster-info kubectl get pods –all-namespaces

sudo journalctl -u kubelet –all | tail kubectl logs 99a04cab33e1 -n=istio-system

kubectl –kubeconfig=/home/linux/.kube/kubeconfig.yaml get svc -n ingress-nginx

kubectl get pods –all-namespaces

kubectl taint nodes –all node-role.kubernetes.io/master-

iptables -S -t nat

kubectl get cs,node,svc,pods,ingress –all-namespaces -o wide ``''

卸载 yum remove kubelet kubeadm kubectl ### 安装指定版本 `` yum install -y kubelet-1.13.5-0.x86_64 yum install -y kubectl-1.13.5-0.x86_64 yum install -y kubeadm-1.13.5-0.x86_64

20191230更新 yum install -y kubelet-1.21.8-0 kubectl-1.21.8-0 kubeadm-1.21.8-0 yum install -y kubelet-1.17.8-0 kubectl-1.17.8-0 kubeadm-1.17.8-0 yum install -y kubeadm-1.14.6-0 kubelet-1.14.6-0 kubectl-1.14.6-0 –disableexcludes=kubernetes ### 查看日志 journalctl -f -u kubelet ```

编辑应用，不需要yaml文件 ： kubectl edit deployment/my-nginx

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