K8s入门

1，docker的安装

## 使用阿里云镜像加速安装下载docker-ce
## 参考链接：https://yq.aliyun.com/articles/110806

# step 1: 安装必要的一些系统工具
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
# Step 2: 添加软件源信息
sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# Step 3: 更新并安装 Docker-CE
sudo yum makecache fast
sudo yum -y install docker-ce
# Step 4: 开启Docker服务
sudo service docker start

2，配置 docker 加速器

## 参考链接https://www.daocloud.io/mirror
## 该脚本可以将 --registry-mirror 加入到你的 Docker 配置文件 /etc/docker/daemon.json 中。适用于 Ubuntu14.04、Debian、CentOS6 、CentOS7、Fedora、Arch Linux、openSUSE Leap 42.1，其他版本可能有细微不同。更多详情请访问文档。
curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io

5，k8s基础命令

## https://kubernetes.io/docs/tutorials/

## 
kubectl  get  nodes
kubectl  cluster-info
## deployment
kubectl  run kubernetes-bootcamp  --image=docker.io/jocatalin/kubernetes-bootcamp:v1  --port=8080
kubectl  get  nodes
## 
kubectl  expose  deployment/kubernets-bootcamp  --type="NodePort"  --port=8080
kubectl  get  services

kubectl delete service -l run=kubernetes-bootcamp
kubectl get services

## scale
kubectl  get  deployments
kubectl  scale  deployments/kubernetes-bootcamp  --replicas=3
kubectl  get  deployments
kubectl  get  nodes

kubectl  scale  deployments/kubernetes-bootcamp  --replicas=2
kubectl  get  deployments
kubectl  get  nodes

## 
kubectl  set  image  deployments/kubernetes-bootcamp  kubernetes-bootcamp=jocatalin/kubernetes-bootcamp:v2

kubectl  rollout  undo  deployments/kubernetes-bootcamp
kubectl  get  nodes

kubectl  get  namespace

kubectl 管理应用程序生命周期

1、创建
kubectl run nginx --replicas=3 --image=nginx:1.14 --port=80
kubectl get deploy,pods

2、发布
kubectl expose deployment nginx --port=80  --type=NodePort  --target-port=80  --name=nginx-service
kubectl  get service

3、更新
kubectl  set image deployment/nginx  nginx=nginx:1.15

4、回滚
kubectl rollout history deployment/nginx
kubectl rollout undo deployment/nginx

5、删除
kubectl  delete deploy/nginx
kubectl  delete svc/nginx-service