20201208 kubernetes (二)

課堂資料

Logo[Kubernetes] Cluster Architecture小信豬的原始部落
Logok8s coredns CrashLoopBackOff知乎专栏
https://www.oneops.co/2019/06/15/kubernetes-install-binary.htmlwww.oneops.co
Logokubernets nodeport 无法访问_nodeport不生效-CSDN博客
Logo设置service的nodeport以后外部无法访问对应的端口的问题_51CTO博客_nodeport指定端口
http://pangguoming.com/blog/architecture/kubernetes-nodeports-denial-of-accesspangguoming.com

課堂練習

kube部屬應用

kubectl create deployment myweb --image=httpd
kubectl expose deployment myweb --type="NodePort" --port=80
kubectl get svc

Scale 應用

kubectl scale deployment myweb --replicas 3
kubectl get deployment
kubectl scale deployment myweb --replicas 2
kubectl get deployment
docker images | grep httpd

滾動更新

kubectl create deployment myweb2 --image=httpd:2.4.43
kubectl get deployment
kubectl get pod
kubectl describe pod [Name]
kubectl set image deployment myweb2 httpd=httpd:2.4.46
kubectl get pod
kubectl get deployment myweb2 -o yaml | grep name
kubectl set image deployment myweb2 httpd=httpd:2.4.46
kubectl get pod
kubectl describe pod [Name]
kubectl rollout undo deployment myweb2
kubectl get pod
kubectl describe pod [Name]
kubectl delete pod [Name]
kubectl get pod -o wide

nodeport cluster

kubectl get ns

  • ns：namespace

kubectl get pod
kubectl get pod -n kube-system
kubectl create ns myns
kubectl get ns
kubectl create deployment myweb3 --image=httpd -n=myns
kubectl get ns
kubectl get pod
kubectl get deployment -n default
kubectl get deployment -n myns
kubectl get deployment --all-namespaces
kubectl get pod -n default
kubectl get pod -n myns
kubectl get pod --all-namespace

安裝 kubelet、kubeadm、kubectl

kubectl get pod -o wide
kubectl exec [Name] date
kubectl exec [Name] -it -- bash
apt install net-tools
exit
kubectl get pods
kubectl describe pod [Name]
kubectl exec [Name] date
kubectl exec [Name] echo "hi"
kubectl exec [Name] -it bash
kubectl describe svc myweb

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