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 1}')

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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

kubectl get deployment

NAME READY UP-TO-DATE AVAILABLE AGE
nginx 1/1 1 1 5d15h