K8S 部署笔记

准备工作

ntpdate time.windows.com

swapoff -a

安装docker-ce、kubelet等

启动docker

systemctl start docker

启动kubelet

systemctl enable kubelet

初始化kube

kubeadm init
--apiserver-advertise-address=192.168.5.221
--image-repository registry.aliyuncs.com/google_containers
--kubernetes-version v1.17.0
--service-cidr=10.96.0.0/12
--pod-network-cidr=10.244.0.0/16

unset DOCKER_HOST

检查是否好了

kubectl get pods -n kube-system

kubectl get node

安装flannel插件

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

wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

kubectl apply -f kube-flannel.yaml

忘记秘钥或者重新连接

kubeadm token create --print-join-command

加入node

kubeadm join 192.168.5.221:6443 --token 5citnv.qwhlzu7ezy3fajke --discovery-token-ca-cert-hash sha256:dc3bd880169f5856a8baeeb636d02d7e64a857cc4ff1594559fe7c080b535b79

加入hosts

199.232.28.133 raw.githubusercontent.com

安装dashboard

kubectl delete -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta8/aio/deploy/recommended.yaml

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta8/aio/deploy/recommended.yaml

kubectl apply -f dashboard.yaml

kubectl get pods -n kubernetes-dashboard

kubectl create serviceaccount dashboard-admin -n kube-system
kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin

运行下面的复制token登录

kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk '/dashboard-admin/{print$ 1}')

eyJhbGciOiJSUzI1NiIsImtpZCI6IkYxWXRzbW44UFBLZFI0ZzlyRnJpZ0FENWZpOEd5NzlLZE9RdWRDVW9lWUkifQ.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.My1Y5IM91EYhNV9O7Aw4zdB4C9QW_itr_jGEtys-AqEBWRRByqrentrtW44WSMx85UOW8iSGtpOsomx2LluecI-6gExY6Z9ZIce9iy7M1Pv5rEyhS3OmtDZNbtU4FKSCgEA-cTiegUzNIP3sqD1fZFwma_Hq5CkUfj6LoRD79u2wGAlu4uWEBjXy08N4tkIf6z5ySsM7-BVP6Waj0pYLHVwc86QhjZ7qeVVaczmJL81ZZjq--ptTS-oWatDGz8MR5K5AiUIzoZUMyz2xy12N1VN7KmZnvbVJ-xbjYrmH67xNKB6_9seSaKs_tf9kHWjNnHF0DHcmPl74SEc1rrLkuQ

创建pod 测试集群

$ kubectl create deployment nginx --image=nginx
$ kubectl expose deployment nginx --port=80 --type=NodePort
$ kubectl get pod,svc

docker save -o flannel.tar lizhenliang/flannel:v0.11.0-amd64

部署镜像到k8s

创建镜像iamge 在镜像java 程序的根目录

docker build -t lizhenliang/java-demo .

一、通过dockerhub方法： 1、登录镜像仓库

docker login

一、通过dockerhub方法： 2 推iamge 到仓库

docker push lizhenliang/java-demo

一、通过dockerhub方法： 3 拉镜像到node节点

docker pull lizhenliang/java-demo

二、通过本地仓库方法： 1 导出镜像到本地

docker save -o java-demo.tar lizhenliang/java-demo

二、通过本地仓库方法： 2 scp 复制到node节点上，导入镜像，无需通过仓库

docker load -i java-demo.tar

部署docker ，先生成镜像yaml 模板

kubectl create deployment java-demo --image=lizhenliang/java-demo --dry-run -o yaml > deployjava.yaml
编辑如下内容
image: 改为本地地址，默认是docker官方hub地址

应用yaml

kubectl apply -f deployjava.yaml

暴露服务，先生成yaml

kubectl expose deployment java-demo --port=80 --target-port=8080 --type=NodePort -o yaml --dry-run > svc.yaml

暴露服务，应用yaml

kubectl apply -f svc.yaml

删除pods

kubectl get pod

kubectl delete java-demo-8548998c57-g2klp

删除已经部署的 pods 方法，要删除deployment ，光删除pod不行

kubectl get deployment

NAME READY UP-TO-DATE AVAILABLE AGE
java-demo 1/1 1 1 4d14h
nginx 1/1 1 1 5d15h

kubectl delete java-demo