k8s新版本集群搭建从0到1

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关闭selinux：
$ sed -i ‘s/enforcing/disabled/‘ /etc/selinux/config
$ setenforce 0

关闭swap：
$ swapoff -a $ 临时
$ vim /etc/fstab $ 永久

添加主机名与IP对应关系（记得设置主机名）：
设置主机名：
vi /etc/sysconfig/network
HOSTNAME=k8s-master
$ cat /etc/hosts
172.16.100.234 k8s-master
172.16.100.120 k8s-node1

将桥接的IPv4流量传递到iptables的链：
modprobe br_netfilter
$ cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
$ sysctl --system
四.所有节点安装Docker/kubeadm/kubelet
1.安装Docker
$ 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
$ docker --version
Docker version 19.03.12, build 48a66213fe
2.添加阿里云的yum源码
$ 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=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

3.安装kubeadm,kubelet kubectl
$ yum install -y kubelet kubeadm kubectl
$ systemctl enable kubelet
#安装kubelet 后会在/etc下生成文件目录/etc/kubernetes/manifests/
5.部署kubernetes Master
kubeadm init --kubernetes-version=v1.19.0 --image-repository=registry.aliyuncs.com/google_containers --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/16 --apiserver-advertise-address=172.16.100.234
使用kubectl工具：
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
$ kubectl get nodes 查看节点是否ready
6.安装Pod网络插件
$ kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
7.加入Kubernete Node
需要在Node端执行
kubeadm join 172.16.100.234:6443 --token 0ieaj1.qtkmnn7d1i35gg0z \
--discovery-token-ca-cert-hash sha256:ae06a272dda677e5966db22882d409be709178be14c062926de356c5d6b48133
8.测试集群
$ kubectl create deployment nginx --image=nginx
$ kubectl expose deployment nginx --port=80 --type=NodePort
$ kubectl get pod,svc
9.部署Dashboard
9.1.wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta5/aio/deploy/recommended.yaml
9.2修改yml文件（默认Dashboard只能集群内部访问，修改Service为NodePort类型，暴露到外部：不修改的话外部不能访问。）
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
type: NodePort（需要增加）
ports:

• port: 443
  targetPort: 8443
  nodePort: 30001(需要增加)
  selector:
  k8s-app: kubernetes-dashboard
  9.3
  kubectl apply -f recommended.yaml
  kubectl get pods,svc -n kube-system (查看安装情况)
  9.4.创建service account并绑定默认cluster-admin管理员集群角色：
  $ kubectl create serviceaccount dashboard-admin -n kube-system
  $ kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin
  $ kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk ‘/dashboard-admin/{print $1}‘)
  记录保存token，使用令牌登录
  登录地址https://172.16.100.234:30001/#/login，复制令牌即可登录

  

k8s新版本集群搭建从0到1

标签：amp   led   package   pack   wal   技术   文件目录   eof   hash   

原文地址：https://blog.51cto.com/luoguoling/2530664