Kubernetes cluster deployment

Image download 、 Domain name resolution 、 Time synchronization please click Alibaba cloud open source image station

One 、 Environmental requirements

System version ：CentOS7.x edition

hardware configuration ： Memory 2GB above   cpu2 Supranuclear   Hard disk is larger than 30G

Cluster network configuration ： The intranet of all servers in the cluster must be interconnected , And you need to access the Internet to pull the image

Ban swap Partition

Two 、k8s Basic environment operation ：

1、 Turn off firewall ：

[[email protected] ~]# systemctl stop firewalld[[email protected] ~]# systemctl disable firewalld

2、 close selinux：

[[email protected] ~]# sed -i 's/enforcing/disabled/' /etc/selinux/config[[email protected] ~]# getenforce

3、 close swap Partition ：

Temporarily Closed ：

[[email protected] ~]# swapoff -a

Permanent ban ： Comment out /etc/fstab In the document swap That's ok

4、 Conduct hosts File editing ：

192.168.8.146     k8s-master

192.168.8.141      k8s-node1

192.168.8.129     k8s-node2 

5、 To be bridged IPv4 Flow to iptables Chain

[[email protected] ~]# cat > /etc/sysctl.d/k8s.conf << EOF> net.bridge.bridge-nf-call-ip6tables = 1> net.bridge.bridge-nf-call-iptables = 1> EOF

[[email protected] ~]# sysctl --system

6、 Turn on IP Forward capability

[[email protected] ~]# echo "1" > /proc/sys/net/ipv4/ip_forward

3、 ... and 、 install docker（ All three machines operate ）

1、 Uninstall the old version docker

[[email protected] ~]# yum remove docker docker-common docker-selinux docker-engine

2、 Install some necessary system tools

[[email protected] ~]# yum install -y yum-utils device-mapper-persistent-data lvm2

3、 To configure docker Stable version repository for

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

4、 Update installation package index

[[email protected] ~]# yum makecache fast

5、 install docker ce

[[email protected] ~]# yum -y install docker-ce-18.06.1.ce-3.el7

6、 Start up and start up automatically docker

[[email protected] ~]# systemctl enable docker && systemctl start docker

7、 see docker edition

[[email protected] ~]# docker --version

8、 Add alicloud YUM Software sources

[[email protected] ~]# vim /etc/yum.repos.d/kubernetes.repo[Kubernetes]baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64enabled=1gpgcheck=1repo_gpgcheck=1gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg

9、

[[email protected] ~]# yum clean all

10、

[[email protected] ~]# yum makecache

install kubeadm,kubelet and kubectl

11、 Due to frequent version updates , The version number deployment is specified here ：

[[email protected] ~]# yum install -y kubelet-1.15.0 kubeadm-1.15.0 kubectl-1.15.0[[email protected] ~]# systemctl enable kubelet

Four 、 Deploy Kubernetes Master（ This is in master Operation in the host ）：

[[email protected]~]#kubeadm init  --apiserver-advertise-address=192.168.8.146 --image-repository registry.aliyuncs.com/google_containers  --kubernetes-version v1.15.0 --service-cidr=10.1.0.0/16  --pod-network-cidr=10.244.0.0/16

    Be careful ：192.168.8.146ip yes master The host ip Address

5、 ... and 、 To configure kubectl Access cluster （ Three machines operate ）：

1、

[[email protected] ~]# mkdir -p $HOME/.kube

2、

[[email protected] ~]# cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

3、

[[email protected] ~]# chown $(id -u):$(id -g) $HOME/.kube/config

6、 ... and 、Master install flannel（ host master In the operation ）：

[[email protected]~]#kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

1、 Look at the index pod

[[email protected] ~]# kubectl get pod -n kube-system

2、 Look at the node

[[email protected] ~]# kubectl get node

7、 ... and 、 Join in node node （ On two node Do on ）：

1、

[[email protected] ~]# kubeadm join 192.168.8.146:6443 --token vhykt2.0jjdgdcnclxhts41  --discovery-token-ca-cert-hash sha256:bf42d67996e593a1e5844ba717d97e1249ed85bf86d83322b88c108d2f6a3dc1

2、 see node1 Whether the node is successful （ stay node1 Do on ）

[[email protected] ~]# docker ps

8、 ... and 、 View node information （ stay master operation ）

[[email protected] ~]# kubectl get node

Nine 、 Deploy dashboard（master Host operation ）

[[email protected]~]#wget https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml

1、

[[email protected] ~]# vim   kubernetes-dashboard.yaml

2、 install dashboard

[[email protected] ~]# kubectl apply -f kubernetes-dashboard.yaml

3、 Use master node ip Address + Port to access , Agreement is https Of

see Dashboard Port information ：

[[email protected] ~]# kubectl --namespace=kube-system get service kubernetes-dashboard

4、 Take my own server as the access object , Use ​ ​https://172.16.204.130:30310​​ Can access

5、Token

[[email protected] ~]# kubectl create serviceaccount dashboard-admin -n kube-system[[email protected]~]#kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin[[email protected] ~]# kubectl  get secret -n kube-system

6、 see token Specific information

[[email protected]~]# kubectl describe secret dashboard-admin-token-92djb -n kube-system

7、 Enter the secret order in the token

8、 Log in to the successful page ：

In this paper, from ：https://blog.51cto.com/u_15397018/5367484