2.28秒创建一个k8s集群（非理论篇，理论自行 -- ）

准备3台centos 7+ （建议7以上，不然要会很麻烦，要升级内核等等，扯淡的东西）

安装docker 和k8s集群（均以最新版为例）基于官网

设置静态ip（可选）

查看本机的网关ip

cd /Library/Preferences/VMware\ Fusion/vmnet8

cat nat.conf

进入centos7

改

service network restart

修改主机名（可选）

echo 'newhostname' > /etc/hostname

centos 7：（可选）

更改模式命令：systemctl set-default graphical.target由命令行模式更改为图形界面模式

systemctl set-default multi-user.target由图形界面模式更改为命令行模式

更改后验证是否正确 shutdown -r now

关闭防火墙（建议）

Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.

systemctl disable firewalld.service

systemctl stop firewalld.service

systemctl status firewalld.service

yum 安装docker

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

systemctl enable docker

systemctl start docker

设置docker国内镜像仓库地址 阿里加速

sudo mkdir -p /etc/docker

sudo tee /etc/docker/daemon.json <<-'EOF'

{

"registry-mirrors": ["https://wwpko457.mirror.aliyuncs.com"]

}

EOF

sudo systemctl daemon-reload

sudo systemctl restart docker

禁用虚拟内存

sudo swapoff -a

设置k8s下载源

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=0

EOF

yum install -y kubelet kubeadm kubectl

— 开机启动

systemctl enable kubelet

systemctl start kubelet

Eg:

docker pull registry.aliyuncs.com/google_containers/kube-proxy:v1.17.0

docker tag registry.aliyuncs.com/google_containers/kube-proxy:v1.17.0 k8s.gcr.io/kube-proxy:v1.17.0

docker pull registry.aliyuncs.com/google_containers/pause:3.1

docker tag registry.aliyuncs.com/google_containers/pause:3.1 k8s.gcr.io/pause:3.1

docker pull registry.aliyuncs.com/google_containers/kube-apiserver-amd64:v1.17.0

docker tag registry.aliyuncs.com/google_containers/kube-apiserver-amd64:v1.17.0 k8s.gcr.io/kube-apiserver:v1.17.0

docker pull registry.aliyuncs.com/google_containers/kube-scheduler:v1.17.0

docker tag registry.aliyuncs.com/google_containers/kube-scheduler:v1.17.0 k8s.gcr.io/kube-scheduler:v1.17.0

docker pull registry.aliyuncs.com/google_containers/kube-controller-manager:v1.17.0

docker tag registry.aliyuncs.com/google_containers/kube-controller-manager:v1.17.0 k8s.gcr.io/kube-controller-manager:v1.17.0

docker pull registry.aliyuncs.com/google_containers/coredns:1.6.5

docker tag registry.aliyuncs.com/google_containers/coredns:1.6.5 k8s.gcr.io/coredns:1.6.5

docker pull registry.aliyuncs.com/google_containers/etcd:3.4.3-0

docker tag registry.aliyuncs.com/google_containers/etcd:3.4.3-0 k8s.gcr.io/etcd:3.4.3-0

docker pull quay-mirror.qiniu.com/coreos/flannel:v0.11.0-amd64

docker tag quay-mirror.qiniu.com/coreos/flannel:v0.11.0-amd64 quay.io/coreos/flannel:v0.11.0-amd64

Kubeadm 常用命令

https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-config/

kubeadm config images list

// 初始化k8s

kubeadm init --apiserver-advertise-address=172.16.203.100  --pod-network-cidr 10.244.0.0/16 --ignore-preflight-errors all --node-name k8s-master

安装pod网络插件

kubectl apply -f  https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

记录这个，因为这个是加入集群的令牌

kubeadm join 172.16.203.100:6443 --token m074vp.re0ahabqfbttzxv4     --discovery-token-ca-cert-hash sha256:d89f464796d5fedf950ea734802be373d9e04144151cefcceaae8f432ab2b2a2 --node-name k8s-node1

重启相关服务

systemctl restart kube-apiserver

systemctl restart kube-controller-manager

systemctl restart kube-scheduler

systemctl start kube-apiserver.service

systemctl start kube-controller-manager

systemctl start kube-scheduler

kubeadm reset

rm -rf $HOME/.kube

常用命令

kubectl get nodes -n kube-system

kubectl get pods -n kube-system

kubectl describe pod kube-proxy-6xq4r -n kube-system

kubectl delete pods kube-flannel-ds-amd64-gk2vn -n kube-system

// 重启

kubectl get pod PODNAME -n NAMESPACE -o yaml | kubectl replace --force -f -

kubectl get pod kube-apiserver-localhost.localdomain -n kube-system -o yaml | kubectl replace --force -f -

Kubectl create deployment nginx —image=nginx

暴露端口

kubectl expose deployment nginx --port=80 --type=NodePort

kubectl get pods,svc

kubectl get pods,svc -o wide

如果

docker pull quay.io/coreos/flannel:v0.11.0-amd64  慢可用 ：docker pull quay-mirror.qiniu.com/coreos/flannel:v0.11.0-amd64

基本master 结束

(管理界面ui)

https://raw.githubusercontent.com/kubernetes/dashboard/v1.1.0.1/src/deploy/recommended.yaml

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml